bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimization and Adjustment Method of Well Pattern in Three Types of Reservoirs in Ultra-high Water Cut Stage
Authors: Wang Peng
Published: June 2022

The well pattern development effect of the three types of reservoirs that have entered the late stage of ultra-high water cut is gradually getting worse, and the inefficient and ineffective wells are gradually increasing. It is necessary to optimize and adjust the well pattern of layer series to improve the development effect. According to the current well pattern, this paper studies the reservoir development, the development status of different well patterns and the adaptability of layer series well pattern combination, and gives the well pattern adjustment methods of three types of reservoirs in the later stage of high water cut in different blocks. This paper summarizes three types of well pattern optimization adjustment methods for three types of reservoirs: 1. For the problems of large well pattern spacing and low control degree in some blocks, infill adjustment is implemented to reduce well spacing; 2. To solve the problems that the adjusted thickness of Class III oil layers in some blocks decreases with the return of Class II oil layers, the original two to three sets of well patterns are mined, and the well spacing is large, and the mining intervals are crossed, the layer series well patterns are merged to improve the injection-production relationship with each other and reduce the well spacing; It is the problem of small well spacing, rapid increase of water cut and small adjustment room of three types of oil layers in some blocks, and well pattern splitting is implemented. Combining with the actual situation, this paper gives the well pattern adjustment modes of three types of oil layers in different blocks at the later stage of high water cut, which has strong guiding significance for the future adjustment of development zones.
Research on well selection and layer selection methods for tapping the remaining oil at the top of thick oil layers using ultra-short radius lateral drilling horizontal wells
Authors: Yang Guangyao
Published: June 2022

The flexible drilling method of ultra-short radius sidetrack horizontal wells is an effective method to utilize the remaining oil at the top of thick oil reservoirs. By analyzing the current status of the SZ oilfield well network, development stage and sand body development characteristics, combined with the characteristics of ultra-short radius lateral drilling horizontal well technology, the areas and formations suitable for ultra-short radius lateral drilling horizontal well tapping are identified, and the criteria for selecting wells and formations for ultra-short radius lateral drilling horizontal wells are established, which is a guide for the application of this technology.
Small well-spaced area development adjustment practices and awareness
Authors: Wang Hongli
Published: June 2022

The small well spacing block was encrypted and adjusted three times from 2009 to 2012, with the injection and extraction well spacing shortened from 250m to 106m, and the proportion of small well spacing wells accounting for 71.3% of the water drive, mainly distributed in Area A, Area B and Area C. The current well network density in the small well spacing area is 90.7 wells/Km2, the formation pressure is 9.12Mpa, there are more exploited layers vertically, the contradiction between layers and within layers is prominent, and there are large differences in oil formation mobilization, resulting in a rapid rise in water content. Through fine geological research, the focus is on improving the use of thin and poor oil formations, controlling the rate of water-bearing rise and restoring the energy of the formation, and constantly exploring effective methods for “controlling water-bearing and decreasing” during the period of exceptionally high water-bearing, so as to improve the development effect of the block and achieve the purpose of stabilizing oil and controlling water.
Study on the law and application effect of variable fluidity polymer flooding to enhance oil recovery
Authors: Chou Cuiying
Published: June 2022

At present, our country most of reservoir with low permeability, strong heterogeneity and poor sand body development characteristics, so for maximizing the aggregate material oil displacement effect of technology on the basis of reservoir play, need on polymer flooding experiment foundation of the converter combined with oil displacement wall and degree of control theory and flow theory, polymer qualitative drop sticky technology is put forward. This paper first analyzed the introduction of variable fluidity polymer in detail, combined with the principle of variable fluidity polymer technology, summed up the experimental process and results of variable fluidity polymer flooding enhanced oil recovery.
Fracturing method and application of low permeability reservoir
Authors: Zhang Huaiwen
Published: June 2022

Fracturing technology of low permeability reservoir is the key technology of reservoir recovery, and the key link of the key technology is fracturing layer selection. In the context of increasing production demand for low permeability reservoirs, the research and development of oilfield technology has carried out related research on low permeability reservoir fracturing method to ensure that the application of technology is more reasonable.
Application of oil and water well dynamic monitoring data in dynamic analysis of oilfield development
Authors: Mei Lingli
Published: June 2022

With the continuous development of social economy, oil field industry has made ideal progress in the current development, while meeting the needs of people’s production and travel, and making common progress with the industrial industry and other fields. This paper analyzes the dynamic analysis of oilfield development under the condition that the stratification of underground oil layer is more and more complicated. Oilfield well dynamic monitoring is mainly aimed at monitoring downhole technology, formation pressure, oil and water output, etc., mainly to provide accurate downhole dynamic data for oilfield development operators, so that the staff can better carry out dynamic analysis, so that oilfield development effect is more ideal.
Research on prediction method of subsequent water flooding index of an oilfield
Authors: Li Liang
Published: June 2022

With the gradual end of polymer flooding in polymer flooding blocks of type II oil reservoirs, the scale of subsequent water flooding production and injection in oil fields is increasing. As can be seen from the subsequent water flooding production, due to different factors such as reservoir properties and injection-production rates, various indicators in the block vary greatly, which brings difficulties to the prediction of indicators in the later stage. Therefore, it is urgent to carry out follow-up research on the change law of water-flooding related indexes to provide scientific basis for index prediction and index control. Based on a large number of actual production data of oil field, the influencing factors of index change are analyzed, and the variation law of actual index of subsequent water flooding in oil field is made clear. By fitting the actual production data of successive water flooding blocks over the years, the empirical formula which accords with the water flooding characteristic curve and production decline of an oilfield is given.
Discussion on the influence of geological parameters on reservoir development in Daqing Oilfield
Authors: Ning Jing
Published: June 2022

With the improvement of social development level, the development speed of all walks of life has been rapidly improved. This increase in speed makes the industry’s demand for energy also show a growing trend. Based on this, relevant departments have also increased the research on oilfield exploration and reservoir development. Among them, through research, it is found that geological parameters have a very significant impact on the oil reservoir development effect. Only based on geological parameters can the developed oil reservoir have the support of objective data and guarantee the development effect. This paper will analyze and study the influence of geological parameters on reservoir development in Daqing oilfield.
Study on combination boundary of permeability level difference and water injection intensity based on reservoir numerical simulation technology
Authors: Zhou Yongquan
Published: June 2022

Series of strata combination in water drive for determining phase development, reservoir property and development parameters difference problems seriously affect the development effect, in order to reduce portfolio development difference between oil layers for the effects of the development in this paper, by using the method of numerical simulation, through the ECLIPSE numerical simulation software, 1 note 4 pick the ideal model is set up and simulated the process of production, To optimize the combined development of reservoir objects, to clarify the combined boundary of permeability level difference and water injection intensity, and to provide theoretical basis for guiding the selection of relevant parameters in the actual production of oil fields.
Influencing factors and strategies of water drive oilfield development effect
Authors: Hao Xuejiao
Published: June 2022

At the present stage, with the rapid social and economic development, people’s demand for oil resources continues to rise. Based on this situation, oil prices continue to rise. At the same time, the management of old oil fields is difficult. In this regard, combined with the example of S oilfield, this paper analyzes the factors affecting the production of S water drive oilfield, and puts forward the adjustment strategy of the production plan, hoping to provide reference for related units.
Analysis on the variation law of polymer flooding index in the first and second oil reservoirs of Daqing Oilfield
Authors: Zhou Yao
Published: June 2022

With the development of oilfield exploitation in China, in-depth understanding of the change of polymer flooding injection-production index can effectively alleviate the contradiction of polymer flooding and improve the production efficiency. Based on this, taking Daqing oilfield as an example, this paper makes a detailed analysis on the classification of polymer flooding stages and the prediction methods of development indicators for the first and second oil layers, and mainly discusses the variation rules of injection-production indicators in the process of polymer flooding for the first and second oil layers, in order to provide reference for others.
Research on temperature propagation law based on thermite plugging and abandonment technology
Authors: Sun Ruitao , Zhang Jie , Li Zhilin , Li Xin , Tao Huaizhi , Yu Sheng , Zhang Wenzhen
Published: June 2022

The continuous exploration and development of oil wells increases the risk of leakage from abandoned wells and brings challenges to the traditional plugging and abandonment technology. In order to overcome the above problems, a thermite plugging and abandonment technology is proposed in this field. The technology uses the aluminothermic reaction to melt the original or set material for sealing. The natural convection under different confinement conditions directly affects the heat flux transfer in the heat transfer process. In order to study the melting effect of the thermite reaction on sandstone, based on the heat conduction theory, a heat conduction model based on the temperature release law of the thermite reaction was established. The numerical simulation results show that the surrounding heat transfer conditions are the key factors affecting the heat transfer effect in the axial and radial directions without considering the particle size and dosage of the thermite itself. This work is of great significance for studying the temperature law of thermite reaction release and the future research of thermite plugging and abandonment technology.
Adsorption Behaviour and Thermodynamic Study of Triazine as A Corrosion Inhibitor for Mild Steel in Oilfield Produced Water
Authors: Wang Qianlong , Panaerhan  , Lei Bo , Han Xiaoyu , Qu Le , Li Yongfei , Wang Peng
Published: June 2022

In recent years, the corrosion problem of equipment and pipeline caused by oilfield produced water is becoming increasingly serious. In this work, corrosion inhibitor of triazine, synthesized from formaldehyde and ethanolamine, was evaluated using weight-loss techniques. The triazine was found to inhibit the corrosion of mild steel in simulated oilfield produced water. The adsorption of inhibitor was studied, which was consistent with the assumption of Langmuir adsorption model. Thermodynamic parameters of corrosion inhibition process were further calculated and analyzed, which indicated that adsorption of triazine inhibitor was exothermic, spontaneous and physical process.
Design of well seismic combined with horizontal well and tracking adjustment while drilling in block A
Authors: Yang Wei
Published: June 2022

Based on the accurate understanding of the reservoir, oil-water distribution and structure of block A, the main oil layers are locally developed in well blocks A, B and C, the favorable parts of the structure are optimized, and the horizontal wells are deployed according to the principle of “increasing the production of horizontal wells in the main layer, not adding new platforms, and the horizontal section is not easy to be too long”. Apply new drilling data to carry out fine structure interpretation and reservoir inversion prediction, update geological model, and guide horizontal well trajectory optimization design and tracking adjustment.
Evaluation and Potential Analysis of Fracture Network Fracturing in Oil Production X Plant
Authors: Di Liu
Published: June 2022

The oilfields developed by our factory are mainly ultra-low permeability reservoirs, and the problems of non-injection and non-production are prominent. When conventional oil well fracturing is used, there are problems such as insufficient water injection energy, low oil increase rate after fracturing, and short validity period, and it is difficult to achieve benefit management. To this end, since 2013, while controlling the under-injected wells, the application of fracture network fracturing has been gradually increased, and a total of 116 wells have been fractured. The contribution reached 4.13%, and the annual mitigation comprehensive decrease contribution was 3.62%.
Widening fracturing potential in different kinds of oilfields
Authors: Zhang Qiaoming
Published: June 2022

The old oilfields in our factory have entered the period of high water cut, the target of fracturing has changed from the main layer to the non-main layer, and the main layers have been fractured again and again. We have difficulty in choosing proper layers because good layers are in high-water-cut and there are not enough emerge in poor layers. As the oil quality of new oilfields deteriorates gradually, the effect of the fracturing gets worse and the effective period is short. The fracturing potential is gradually reducing. In this paper, according to the characteristics of different oilfields, the focus of potential exploitation will be shifted to the high aquifer where the remaining oil is enriched and thin differential layer in old oilfields, The new oilfields will carry out fracturing reconstruction corresponding to oil and water wells to shorten the displacement distance. By constantly quantifying and optimizing the principle of well selection and layer selection, perfecting the adjustment mode, optimizing the fracturing technology and scale, and taking the “three development”, the fracturing potential is further released. The effect of the fracturing is guaranteed, and the development of the oilfield is improved.
Research on Ultra-low Permeability Oil Development System Based on Oilfield Fracturing Water Displacement System
Authors: Qin Guibin
Published: June 2022

In order to realize the effective water injection development of oilfield reservoirs, large-scale fracturing technology was introduced. The simulation confirmed that the large-scale fracturing well has the characteristics of high initial production, fast water injection effect, and rapid water cut rise after the effect., the research results show that compared with elastic development, water injection development can solve the problem of rapid formation energy depletion, and at the same time increase the reservoir producing area and displacement time. The final water content of water injection huff and puff is about 25% lower than that of conventional water injection, and advanced water injection can increase the production of conventional elastic development by about 30% in the early stage. It can be seen that these two new development methods are conducive to suppressing water flooding and improving oil recovery.
Early and middle Jurassic sequence stratigraphic division of M coalfield in Xinjiang
Authors: Yao Qiuhui , Cui Kai
Published: June 2022

The coal accumulation in the M coalfield occurred in the Early-Middle Jurassic. There are three main coal-bearing strata in the M coalfield, the Early Jurassic Talicike Formation, the Yangxia Formation and the Middle Jurassic Kizilenur Formation. Based on the sequence stratigraphic division and sedimentary environment analysis of 85 Jurassic wells in the Kubai Basin, and the compilation of sequence stratigraphic correlation profiles for 20 well-connected wells, this paper comprehensively studies the drilling, logging, outcrop, core and paleontological data. This paper establishes the isochronous sequence stratigraphic correlation framework of the Jurassic in the Kubai Basin with third-order sequences as units. Finally, this paper studies the sequence stratigraphic characteristics and lithofacies paleogeography of each Jurassic sequence in the M coalfield.
Effect of paraffin precipitation on core flow in porous media capacity during fracturing
Authors: Wang Guangtao , Gong Yufeng , Cao Zongxiong , Deng Xianan , Li Changheng
Published: June 2022

Low-permeability sandstone reservoirs have become an important exploration and reserve increase target in China, but most low-permeability sandstone reservoirs with high wax content and high freezing point will reduce their production after fracturing injection, especially in winter. Therefore, it is necessary to analyze the field fracturing construction measures and reservoir characteristics. Generally, the fracturing fluid injected by fracturing operation is at room temperature, even lower than 5 °C in winter, and the viscosity and freezing point of crude oil in this block are high. Therefore, the research focuses on the properties of crude oil and the influence of temperature reduction on oil-bearing cores. In order to find out the mechanism of reservoir cold damage, this paper first observed the pore throat of rock sample slice after displacement experiment, and found that there were black paraffin particles in some pore throats; then the distribution of core pore size after displacement was analyzed by T2 spectrum of NMR, and it was found that the proportion of small pores increased gradually with the decrease of temperature. Finally, the displacement experiment is used to simulate the change of permeability in the process of formation cooling and heating after field fracturing. The permeability of crude oil is tested by changing the ambient temperature of displacement experiment. It is found that the permeability before cooling is larger than that after heating recovery, and the process is irreversible. Therefore, the cause of cold damage is that the injection temperature of fracturing fluid is far lower than the formation temperature and the precipitation of paraffin during the cooling process of crude oil. For reservoirs with high wax content and high freezing point, paraffin precipitation caused by cold damage has a great influence on formation permeability, and cold damage can be prevented by changing injection fracturing fluid temperature or adding paraffin inhibitor.
Laboratory experimental study on the binary combination flooding system in low permeability conglomerate reservoir
Authors: Zhao Fajun , Zhu Guangmeng , Jiang Yifan , Guo Qinyuan , Fu Dongli
Published: June 2022

In view of the poor injection-production effect of low permeability conglomerate complex fault block reservoir in Xinjiang Oilfield in the late development stage of high water cut, the indoor experimental study of binary compound flooding system was carried out. By compounding the petroleum sulfonate and polymer binary system, the viscosity and morphology parameters of the binary compound flooding system were measured. The microscopic pore structure of the core in this block was analyzed by GE Phoenix Nanotom S, and four groups of experimental schemes were designed to study the oil displacement efficiency of the whole diameter core binary compound flooding system. The experimental results showed that the binary system of surfactant and polymer showed additive synergistic effect. The performance of binary compound system is less affected by polymer molecular weight and solution concentration, which meets the viscosity requirement of low permeability conglomerate for binary compound flooding system. The porosity of samples is relatively small and the connectivity between pores is relatively poor. The experimental results of physical model oil displacement efficiency show that the oil recovery can be increased by more than 17% by injecting 0.3PV 1200mg/L polymer + 0.5% (w) surfactant binary compound system.
Research on Exploration System of Petroleum Geological Development Based on Oilfield Fracturing Technology
Authors: Zhang Jing
Published: June 2022

Oil and gas energy is one of the necessary energy sources for social development. In the process of oil development and exploration, hydraulic fracturing technology plays a vital role. Hydraulic fracturing technology can not only stabilize the production of conventional oil and gas fields, realize the development of low-permeability oil and gas reservoirs, help the development and adjustment of old oil fields, but also increase the development production of special oil reservoirs and tap the potential of oil and gas fields. In this paper, an electrical simulation experiment method for the productivity of horizontal well staged fracturing is studied. Firstly, according to the actual formation conditions after staged fracturing of horizontal wells, a set of three-dimensional electric field simulation device is simulated and developed; According to the wellbore trajectory, formation permeability and formation thickness, etc., the electrolyte and electrolytic cell size for electrical simulation are set. Finally, the current signal is collected to determine the size of the production capacity. Using this experimental method, we carried out the optimization simulation of horizontal well fracturing fracture shape and location, optimization simulation of fracture number and spacing, and comparison of different formation thicknesses for a fluvial facies sedimentary sand body. This electrical simulation experiment method can accurately simulate the influence of various parameters of horizontal well fracturing and completion on productivity, and has certain guiding significance for the design of horizontal well fracturing and completion.
Investigation on the asymmetric inter-fracture asynchronous huff-n-puff technology for the horizontal well group in the tight oil reservoir
Authors: Kang Shaofei , Pu Chunsheng , Huang Feifei , Wang Yuchuan , Wang Kai , Zhang Tong
Published: June 2022

Water huff-n-puff is one of the effective energy supplement methods for the development of tight oil reservoirs by horizontal wells. However, the oil production performance of water huff-n-puff severely decreases after several cycles. Available researches indicate that the inter-fracture asynchronous injection-production technology for the horizontal well is an efficient method for improving the oil production performance of water huff-n-puff. However, considering the object of the inter-fracture asynchronous huffn- puff is the single horizontal well, the study for a horizontal well group is less. Therefore, the asymmetric inter-fracture asynchronous huff-n-puff technology for the horizontal well group was investigated in this paper. The oil productions of the horizontal well group for different huff-n-puff modes were compared and analyzed first. After that, the oil recovery mechanisms of the asymmetric inter-fracture asynchronous huff-n-puff technology for the horizontal well group were revealed. Finally, the influence of operating parameters on the oil production of the horizontal well group for the asymmetric inter-fracture asynchronous huff-n-puff technology for the horizontal well group was studied by the numerical simulation method. The results show that compared with the water huff-n-puff, the accumulative oil productions for the asymmetric inter-fracture asynchronous huff-n-puff technology for the horizontal well group increased by 5134.8m3, and the increased amplitude is 36.86%. The imbibition, the inter-fracture displacement, and the inter-well displacement are the main oil recovery mechanisms of the asymmetric inter-fracture asynchronous huff-n-puff technology for the horizontal well group. The accumulative oil production of the horizontal well group for the asymmetric inter-fracture asynchronous huff-n-puff increases first, and then declines, finally tend to be stable with the increase of injection rate. Both the injection volume and the soaking time show a positive correlation with the accumulative oil production. The accumulative oil production of the horizontal well group decreases with the increase of production rate due to the aggravation of water channeling in the production stage. This work could provide certain theoretical guidance for the effective development of similar reservoirs by the horizontal well group.
Research and application of plugging technology for fractured formation in Yihuang block
Authors: Sun Yan
Published: June 2022

The formation drilling in Yihuang block is prone to loss and difficult to plug. Through field practice and mechanism analysis, it is concluded that the leakage in this block is mainly caused by the propagation of micro-fractures and the connection of natural fractures. In view of the leakage characteristics of the block, the indoor study is carried out, and all the plugging materials in the plugging zone are cemented and solidified with gel materials, forming a plugging working liquid called Dust-1. The working fluid works at well temperature of 50~60°C, curing strength of 24 hours is 28MPa, good fluidity, strong pressure bearing capacity and can be cured. In the field test of 7 Wells in Yihuang block, the drilling cost is reduced by 15%, and the pressure bearing capacity of leakage layer is increased from 1.19g/cm3 to 1.25g/cm3, indicating that this technology can meet the plugging needs of differential pressure induced fracture loss in Yihuang block.
The discussion about comprehensive regulation and control methods of Low and non-effective circulation layers in ultra-high water cut stage
Authors: Wang Yu
Published: June 2022

As the oilfield enters the ultra-high water cut stage, the development situation of water flooding is becoming increasingly severe, facing problems such as increasing natural decline, rapid water cut rise, and serious low and non-effective circulation. How to accurately identify low and non-effective circulation layers, effectively adjust them, and alleviate the interlayer contradiction, is an important subject of water control and efficiency improvement project. In recent years, in view of the difficulty in identifying low and non-effective circulation layers in water flooding and the unsatisfactory control effect, a platform of preferential seepage channels identification has been developed, to achieve accurate identification of low and non-effective circulation layers. A classification and evaluation of low and non-effective circulation layers use the recognition results combined with the dynamic and static data has been carried out. The personalized plan has been carried on the field application. It achieved good effect for improving producing reservoir effectively, controlling water cut rising, providing reference basis for determining control low and non-efficient circulation layers.
Study on Class 3 reservoirs infill adjustment methods
Authors: Zhang Yu
Published: June 2022

The exploitation object of the Class 3 reservoirs of infill adjustment well pattern is SaPu thin and poor oil reservoir and Gaotaizi oil reservoir. The remaining oil potential of thin and poor oil reservoir and untabulated reservoir is brought into full play to the maximum extent, which is the focus of this infill adjustment. Therefore, it is necessary to carry out effective research on the formulation of mining plan, the dynamic change law of new and old wells from plane connection to vertical sedimentary units, and the tracking and adjustment of surrounding wells. First, according to the change law of sand body control degree in different oil layers and different well spacing, combined with the remaining oil distribution characteristics of Class 3 reservoirs of Sapugao oil layers, the well pattern and well spacing are optimized. The second is to study the complex well pattern, well location relationship and its matching adjustment timing. Through the structural adjustment of the infill well pattern of the Class 3 reservoirs in plane and vertical combination, A set of adjustment and tapping technology of the infill well area of the Class 3 reservoirs is formed, which gives full play to the remaining oil potential. Compared with the expected single well daily oil production of the typical region increases by 1.2t, water cut decreases by 2.8 percentage points, and the natural decline is - 10.22%. The research results of this innovative well pattern infill combination method and potential tapping method of matching adjustment have certain reference significance for guiding the adjustment and potential tapping of infill well area of Class 3 reservoirs in water drive.
A method for predicting the build-up rate of single-bending positive displacement motor assembly in compound drilling
Authors: Hu Guangqiang , Zhou Taibin , Diao Binbin , Liu Zhe , Liu Rui
Published: June 2022

Accurately predicting the build-up rate of single-bending positive displacement motor (PDM) assembly in compound drilling is helpful to rational design the well trajectory, realize compound drilling in long well sections and improve the rate of penetration. Based on the calculation model of corrected build-up rate of single-bending PDM assembly in sliding drilling, the build-up rate calculation method of single-bending PDM assembly in compound drilling was established by combining the trajectory measurement data of the drilled sections, and the influence law of parameters such as bending angle, weight on bit, bit anisotropy index and formation inclination on the build-up rate of compound drilling was analyzed. And the following results are obtained. First, the build-up effect of the single-bending PDM assembly during compound drilling is mainly the result of the leverage effect and pendulum effect of the drill tool assembly, as well as the natural deviation of formation. Second, the composite drilling build-up rate is related to the drilling tool structure, bit performance, drilling parameters, formation inclination and other factors. In conclusion, the factors affecting the build-up rate of conventional drilling tool assembly also have impacts on the composite drilling build-up rate of single-bending PDM assembly. The method is important for the control of well trajectory during compound drilling.
Deepwater Oil-Based Drilling Fluid Systembased on Grey Wolf Optimized BP neural network
Authors: Sui Dianjie , Zhan Mingwang , Sui Dianxue , Zhao Fulei , Yu Qiannan
Published: June 2022

In this paper, a BP neural network model with 5-9-6 structure is constructed according to various fault gases and different fault types ofWater-based drilling fluid and synthetic-based drilling fluid. While there are few studies relating to oil-based drilling fluid, which is attributed to the potential toxicity of conventional oil-based drilling fluid to the marine environment. However, oil-based drilling fluid is excellent in protecting the borehole stability. To this end, an environmentally friendly deepwater oil-based drilling fluid was developed based on the traditional oil-based drilling fluid. With the advantages such as good borehole stability and good wettability, this drilling fluid will not pollute the marine environment, is resistant to high temperature, and protects hydrocarbon reservoir, which is of great significance for rational exploration and development of deep-sea resources.
Research Status of Deepwater Drilling Fluid on Artificial Intelligence
Authors: Sui Dianjie , Zhan Mingwang , Sui Dianxue , Zhao Fulei , Yu Qiannan
Published: June 2022

The potential benefits of creating intelligence are huge, Oil, as the world’s main energy material, is an important energy that relates to the national economy and people’s livelihood. In recent years, with the rapid development of national economy and society, the demand for energy has also increased. In this context, deepwater energy has become the focus of attention. In this paper, the research results of and the challenges faced by deepwater drilling fluid at home and abroad in recent years are summarized.
Preparation of oligosaccharide CQ01 and its lubricity in drilling fluid
Authors: Wang Qingchen , Wang Weiliang , Hu Zubiao , Wei Yan , Chen Gang
Published: June 2022

Based on its good water solubility, temperature resistance and environmental protection, oligosaccharides are widely used in food and beverage, baking and medical care. In view of the poor lubrication performance of drilling fluid in ultradeep wells, long horizontal wells and highly deviated wells, and the problems of environmental protection and temperature resistance faced by drilling fluid lubricants, its application is limited. Therefore, in order to reduce its limitations and improve its application, it is necessary to study oligosaccharides. Using vegetable gum rich in oligosaccharides as raw materials, oligosaccharide CQ01 high-performance lubricant can be developed, and its action efficiency in drilling fluid can be experimentally investigated. High performance drilling fluid lubricant meeting the requirements of environmental protection and drilling engineering can be developed, and its lubrication performance, temperature resistance and compatibility can be evaluated in laboratory experiments. The results show that oligosaccharide CQ01 has multiple effects of increasing viscosity and cutting, reducing filtration and improving the lubricating performance of drilling fluid. CQ01 lubricating fluid with low content of oligosaccharide has good adaptability to drilling bentonite. The lubrication mechanism of oligosaccharide CQ01 is that the hydrophilic group (- OH) in oligosaccharide CQ01 molecule is adsorbed on the borehole wall rock surface or drilling cuttings surface to form a chemical adsorption film, resulting in the friction surface being separated by the chemical adsorption film to play the role of lubrication.
Influence Factors and Elimination on Iron Content Using ICP-AES Method in Oilfield Produced Water
Authors: Wang Xinqiang , Guo Zilong , Chen Xing , Liu Zhuang , Yang Nan , Xie Juan
Published: June 2022

ICP-AES method can be used to determine multiple metallic elements simultaneously, and has the advantages of high sensitivity, good repeatability and high accuracy. In the paper, the detection limit of iron content was determined by stepwise dilution method. The influence of the cationic concentration on the determination of iron element was studied, and the matrix matching method was proposed to eliminate the influence. The results show that, the determination limit of Iron element is 0.01 mg·L-1. Because the other cationic content is several times or even tens of times as much as iron ions, it has a great influence on the determination results of Iron element. The effects of cationic concentration can be effectively eliminated by establishing a standard curve using matrix matching. After digestion pretreatment on the oil and gas field produce water, The standard adding recovery rate was between 95% and 105%, and the RSD is less than 4%. Compare this method with o-phenanthroline spectrophotometry, its relative error is within 5%. Therefore, ICP-AES method can fully meet the requirements of determination of iron content in oil field produce water, and greatly improves the efficiency and accuracy of the laboratory analysis of oil and as field wastewater.
Study on Recycling Scheme of Lake Mead Wastewater
Authors: Li Sichen , Huang Jingyang , Su Wangyu , Liu Mocheng
Published: June 2022

There is a sever draught happening in the Mead Lake that the observation of the lake elevation is decreasing dramatically. With increasing water demand in people’s life, people need to find more supply for them to meet their needs. There is a good way that recycling the wastewater from sinks, toilets and showers. For some people, they may think it impossible and even disgusting but this kind of technology exists and developing. Before conducting the wastewater recycling program, we need to investigate more about the impact of drought on reservoirs like the volume and elevation change of the Lake Mead and consider wastewater recycling as a solution to water shortages, Introduced by the environmental issue, the wastewater recycling program can be conducted. We consider some factors that may influence the plan like the changes in the water level of Lake Mead, demand of water and cost. We also prioritize the decisions that local leaders need to make and their impact. Finally we give our plan for this wastewater recycling program into three stages.
Cause Analysis and Solution of Boron Concentration Reduction in Three Generation Nuclear Power Passive Core Makeup Tank (CMT)
Authors: Qu Tianzuo , Li Shuaishuai , Wei Jiefeng , Fang Qishu
Published: June 2022

During the normal operation of the third-generation nuclear power plant, according to the requirements of the technical specification (TS), the CMT should be sampled every seven days, which should be controlled between 3400ppm and 4500ppm. However, due to various reasons, the boron concentration of CMT will drop abnormally. In order to meet the requirements of the technical specification, it is necessary to supplement boron to CMT frequently, which will cause a series of serious problems. Therefore, it is necessary and urgent to solve the problem of abnormal reduction of boron concentration in CMT.
Application Research and Simulation Analysis of Power Address Mining Based on Address Fuzzy Matching Algorithm
Authors: Guo Jian
Published: June 2022

Address recognition, as one of the important scenarios of natural language processing in big data applications, is an important and extremely practical technical means. Currently, the evolution of big data applications is being actively promoted, and more and more people are using big data technology to empower power address recognition. Address information in many data assets is the core area of connected devices, and the analysis and mining of core algorithms has extremely high value. This paper first analyzes the application scenarios involved in the common address information of electric power, and formulates the extraction and matching method according to the key points of the core application scenarios and the address recognition requirements; then, based on the data samples, the accuracy and calculation speed of the address recognition method are studied, and the Algorithms are analyzed and compared. Practicality; finally summarize the algorithm, and look forward to ways to improve the algorithm in the future.
Thermodynamic study on Chemical Looping Gasification of Biomass with the CuMn2O4 and CaO dual-effect oxygen carrier
Authors: Wang Ziyu , Xi Jiaze , Zhang Yunwei , Xue Meng , Du Shijie
Published: June 2022

CuMn2O4 and CaO were mixed in a certain proportion to prepare dual-effect oxygen carriers. A model of biomass chemical looping gasification with corn cob as biomass, CuMn2O4 and CaO as the active ingredient of dual-effect oxygen carriers was performed, and the thermodynamic analysis of the reaction was performed. The appropriate reaction conditions and the appropriate proportion of reactants were obtained by taking the yield of syngas component, the carbon conversion rate and the removal capacity of CO2 as the main evaluation indicators. The optimal value of n(CuMn2O4)/n(B) is 0.09, the optimal reaction temperature is 800°C, the optimal reaction pressure is standard atmospheric pressure, the optimal value of n(CaO)/n(B) is 1.5, the optimal value of n(H2O)/n(B) is 1. In this reaction system, the yield of H2 can reach 1.1857 mol/mol, the yield of CO can reach 0.33224 mol/mol, the carbon conversion rate can reach 50.70%, and the adsorption rate of CO2 by CaO can reach 58.08%.
Two-tier power planning considering capacity tariff compensation
Authors: Wang Sixian , Ma Xiaoqing , Li Yang , Liu Zongqi
Published: June 2022

Faced with a high proportion of new energy power systems in the future, thermal power units will become the main peaking power source, and the reasonable recovery of their capacity value will become a focus of attention. To plan the power supply structure while considering the capacity tariff of thermal units and support the development of low-carbon energy, this paper proposes a two-tier power supply planning model that coordinates the scenery-to-fire ratio with the capacity tariff and proposes a capacity compensation mechanism for thermal units based on the effective capacity. With the gradually increasing ratio of scenery to fire, the capacity tariff compensation for thermal power units will be on the rise, providing a reference for the coordinated development of power supply planning and power market under the high proportion of new energy.
Vibration control technology of reheat steam hot section pipeline of 135MW unit
Authors: Yuan Tangqing , Yuan Fei , Li Jidong , Zhang Huakai , Jian Mingjian
Published: June 2022

Based on the on-site cold and hot state inspection of the four pipelines of a 350MW unit in Shandong, combined with the review and calculation of stress, design and installation data, operation and maintenance records and other data, this paper formulates a practical adjustment plan and construction scheme, implements comprehensive adjustment and treatment of the four pipeline supports and hangers, basically restores the normal working state of the supports and hangers and pipelines, and ensures the safe operation of the unit.
Analysis and treatment of large-scale nuclear heating commissioning problems
Authors: Li Shuaishuai , Yang Donghai , Qu Tianzuo , Fang Qishu
Published: June 2022

Through the modification of a nuclear power plant, the extraction steam on the exhaust pipe of the high-pressure cylinder of the steam turbine is used to heat the circulating water of the heat network, and the pressurized anf heated circulating water of the heat network is supplied to the secondary thermal power station, and then supplied to various users after heat exchange, realizing the first large-scale nuclear heating in China. This paper introduces the function and process of nuclear heating system, and focuses on the analysis of the problems in the commissioning process, which provides a reference for the commissioning of other domestic nuclear power plants after nuclear heating modification.
Research progress and application of photobioreactor in wastewater treatment
Authors: Xiao Yingtian , Luo Yuhu
Published: June 2022

The first photobioreactors were born in the 1950s, and photobioreactors based on microalgae have potential applications in the pharmaceutical industry, food and feed production, environmental engineering, wastewater treatment, and renewable energy. Photobioreactors were first used in pollutant treatment for carbon dioxide sequestration in 1953 at the Carnegie Institute in Washington. Photobioreactors use stable and efficient algae cultivation technology to create an artificial environment that provides all necessary conditions for algae growth such as (light, temperature, nutrients), and these conditions can be controlled and monitored, especially for microalgae cultivation, It is convenient for the rapid, stable and controllable growth of microalgae. Currently, there are many types of microalgae-based photobioreactors in terms of configuration, fabrication materials, and operating modes. It can optimize biomass production, improve the efficiency of pollutant removal, reduce cost and improve space advantage. The most common structures for photobioreactors are flat, columnar and tubular, followed by hoses and hybrid photobioreactors, taking their flexibility and efficacy to a higher level. Each photobioreactor type has its own advantages and disadvantages in terms of operation, biomass production, pollutant removal efficiency, and level of upgrade.
Research on lake protection scheme based on clustering algorithm
Authors: Ji Rongchang , Yan Zhien , Lin Haihao , Zheng Hao
Published: June 2022

In recent years, global drought, particularly in the lake region, has become a crucial issue of discussion for a few specialists. In this paper, based on this background, establishes a clustering algorithm to determine the effect of major factors, uses a multiple regression model and game model analysis to determine the change of water in the area and waste water recycling, as well as discusses the gains of drought problem solving in the actual process of solving the wastewater problem.
Experimental study on long-term aging of photovoltaic modules in plateau environment
Authors: Zhou Guomin
Published: June 2022

There are some studies on the long-term aging power attenuation of components in China, but in Tibet, an area with high altitude and high ultraviolet intensity, there are no specific data and research materials on whether the attenuation factor of component power is the same as that in the mainland, whether the high altitude environment has an impact on the service life of components, and how the impact law is. The law and degree of aging attenuation of modules are an important basis for the maintenance of photovoltaic power stations. Therefore, it is very meaningful to study the long-term aging attenuation of photovoltaic modules in high-altitude areas.
Design and Operational Effect Analysis of the Consumption Early Warning Function of the New Energy Cloud Platform
Authors: Li Nana , Xie Guohui , Qi Caijuan , Ma Yanxia , Shan Yu
Published: June 2022

The New Energy Cloud platform provides users with efficient, fair, just, and quality services, and optimizes the business environment in the new energy field. It is of immense significance in promoting national energy transformation, accelerating power system reform, and building the Energy Internet, and can effectively support the construction of energy big data centers, form an ecosystem of the energy industry, drive the intelligent manufacturing of equipment, and boost economic growth. We studied the design of the consumption early warning function of the consumption computing sub-platform of the New Energy Cloud, and propose the analysis indicators and consumption early warning methods and the operational benefit analysis process of the consumption early warning function. Finally, we demonstrate the results of the consumption early warning function of the New Energy Cloud platform and analyze the operational effect of the consumption early warning function.
Research on Water Supply Reconstruction Design of Fire Pool
Authors: Duan Chunyi , Hong Chen
Published: June 2022

With the continuous promotion of secondary water supply in urban high-rise buildings, the corresponding difficulty of water supply management is also increasing. In order to facilitate water supply management, enable users to use tap water that meets the requirements of the national standard, and improve the living standards of urban residents, this paper analyzes the design of the secondary water supply reconstruction, and puts forward corresponding suggestions for its design, aiming to further improve the secondary water supply. Renovation lays the foundation.