bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of surface drainage system in Zhangbei coal mine and forecast of gas drainage
Authors: Wang Bo
Published: September 2020

In order to optimize the design of the surface well extraction system at the 11418-working face of Zhangbei Mine, the gas drainage volume at the 11418 working face of Zhangbei Mine is predicted. Based on COSFLOW numerical analysis, this paper predicts the amount of gas drainage and gas emission from the borehole of the 11218 face in Zhangbei Mine. Through the CFD simulation of the gas distribution law in the goaf of the 11418 face, the layout position of the surface well is optimized. The gas drainage test showed the gas drainage volume of the borehole in the 11418 working face of Zhangbei Mine. The research shows that the use of ground-well extraction technology in the goaf can replace the high-drainage roadway in the roof and reduce the gas drainage intensity of other measures, thereby reducing the engineering cost.
Analysis on the restriction of oil use to environmental protection
Authors: Sun Ping , Li Junpei
Published: September 2020

In recent years, with the rapid development of the economy of various countries and the vigorous development of all walks of life, as one of the main raw materials of the products of major enterprises, the use of oil has also increased, but at the same time, it has caused a lot of repairable and irreparable hazards. This paper expounds the importance of oil for economic development and the current situation of oil, which is also strong. The importance of environmental protection is adjusted. The earth is the home for human beings to survive. The improvement on the natural environment is one of the bases of human survival. The restrictive factors of oil on the implementation of environmental protection policies are listed. After that, I put forward some suggestions, hoping that enterprises or governments can increase business investment in renewable energy, slow down the negative pressure of petroleum on the environment, and promote the harmonious development of human and nature.
Design and Verification of Valve Fire-Resistant Experimental Device
Authors: Xiang Yingjun , Li Jilin
Published: September 2020

The valve plays the role of a switch in the production process of the petrochemical industry, but there are often fire and explosion accidents in actual working conditions. The fire resistance of the valve is the ability of the valve to maintain normal operation in high temperature flames. It is a measure of the safety performance of the valve. Important indicators. This article mainly describes in detail the principle, equipment structure and design schemes of the fire resistance test device. The test of the valve fire test device was successfully carried out. The tests show that the performance parameters of the test device, such as temperature and pressure, meet the relevant requirements of the standard API 607 and API 6FB. Using high-precision sensors and advanced data collectors, it can simultaneously collect data such as pressure, temperature, and leakage. The fire resistance test of the valve was successfully completed, and the problems existing in the test were improved, and the direction of future optimization was proposed.
Optimization of calculation method for natural gas deviation coefficient of tight sandstone gas reservoir in Ordos Basin
Authors: Yang Xiaolong , Wu Yong , Wang Lei , Zhao Yinchen , Zhou Zhedong , An Weibing
Published: September 2020

The deviation coefficient of natural gas is an important parameter in the evaluation of gas reservoir geological reserves and the analysis of pipeline gathering and transportation capacity. For S blocks the status quo, no natural gas high pressure physical properties test data. In the current commonly used deviation based on the analysis of calculation method and the suitable condition, according to the S block formation temperature pressure condition and gas components, using different calculation methods for calculation, the gas deviation factor under different pressure and adjacent regions natural gas high pressure physical properties test results, S block gas deviation factor calculation method for optimization. The research shows that the calculated results of the beggs-Brill method are similar to the test results, and it is appropriate to use the Beggs-Brill method to calculate the natural gas deviation coefficient in Block S.
Discussion on the probiems and treatment methods in the development of aonan low permeability oilfield
Authors: Liu Xingjia
Published: September 2020

Although the geological conditions of low permeability oilfield are poor and the development is difficult, with the rapid development of China’s economy, the demand for petroleum products is increasing, and the rich oil reserves of low permeability oilfield are attracting more and more attention. This paper discusses the problems existing in the development of Aonan low permeability oilfield, analyzes the main factors affecting the development effect, and discusses how to effectively develop and treat low permeability oilfield.
Data Analysis of Hydraulic Fracturing Pressure in Unconventional Oil and Gas Fields
Authors: Lei Jingchao , Fan Yijun , Li Yueli , Xu Tonghao
Published: September 2020

After the completion of fracturing construction in unconventional oil and gas fields, the phenomenon of water hammer oscillation in the process of pump stopping during fracturing construction will lead to the inaccuracy of reflecting the trend of pressure transformation and increase the difficulty of fracturing effect evaluation in the process of fracturing construction. Therefore, three filtering methods, Savitzky-Golay filter, FFT filter and wavelet transform filter, are used to calibrate the measured pressure in this paper It is found that the method of wavelet transform can achieve the most ideal effect by comparing with the measured data. The field example of well X1 in Ordos Basin proves that the method of wavelet transform can accurately reflect the trend of pressure transformation. This method is of great significance to improve the evaluation of post pressure effect in the process of fracturing construction.
Impact of Oilfield Operating Cost Splitting Ratio on the Evaluation of Listed Developed Reserves
Authors: Yang Jixiang
Published: September 2020

Proven reserves of oil and gas reflect the value of the oilfield and its future development. At present, the developed reserves of Daqing oilfield play an absolutely dominant role in the proved reserves. Under the condition of certain parameters, the economic limit yield plays a decisive role in the developed reserves, and the split ratio of operation cost is one of the key factors affecting the economic limit yield. The impact of operation cost splitting ratio on the evaluation of listed developed reserves is studied to provide support for the objective and reasonable evaluation of developed reserves in the future. Based on the formula of economic limit production, the relationship between economic limit production and operating cost splitting ratio of a single well is derived, and the effect of operating cost splitting ratio on the verified developed reserves under different oil prices is obtained. The results show that the change of operation cost splitting ratio under low oil price has great influence on the proved developed reserves.
Study on determination method of economic limit water cut of water drive oilfield in ultra-high water cut stage
Authors: Mao Yiping
Published: September 2020

According to the waterflooding characteristics in extra-high water cut stage of oilfield, a calculation model which is based on profit and loss balance principle has been created. This model can be used to identify the economic limit water cut of producers with different cost component. With the use of this model, the economic limit water cut in a development block of Daqing Oilfield with different oil prices has been calculated, and according to the economic benefit, producers have been classified into different group. This model is a significant basis of well shut-in and oil-field development.
Field Analysis and performance study of an integrated hydrocyclone for degassing and deoiling
Authors: Lu Qiuyu , Wang Suling , Zhang Yong , Zhao Xinyu , Dong Kangxing
Published: September 2020

To solve the problem of oil and water being unable to be efficiently separated under gas-containing conditions, an integrated cyclone capable of efficiently separating the three phases of oil, gas and water is designed based on the principle of cyclonic separation. Flow field analysis and separation performance study of different treatment amounts, split ratios and oil contents were conducted, and the effects of gas-phase distribution, oil-phase distribution, pressure field and separation efficiency in the cyclone under different conditions were shown. Results indicate that show that the outlet pressure drop, the increase rate and the separation efficiency gradually increase as the processing capacity increases. As the split ratio increases, the oil-phase separation efficiency gradually decreases, and the pressure loss at the bottom flow port gradually increases. The experiment and simulation show that the separation efficiency is the highest when the sum of the internal overflow splits is 50%, and the optimal processing capacity is 23 m3/h. The cyclone has a strong adaptability to liquids with different conditions, and the separation efficiency can reach 98.6%.
Research and Understanding of Reservoir Sedimentary Facies Characteristics in New Drilling Area
Authors: Zhang Hong
Published: September 2020

After more than 50 years of development, Daqing Oilfield has gained a lot of knowledge in basic geological research. But because of the new drilling area increased in recent years, with the increasing density of the well pattern, there are certain problems in the study of sedimentary facies characteristics and the recognition of sedimentary patterns in the new drilling area. Therefore, the new drilling area needs to be improved and re-recognized on the basis of the study of the whole secondary stratum and the sedimentary facies of the whole area, so as to further drive the overall re-recognition of the geological characteristics of the entire development area and the geological characteristics of sedimentary unit-level structure modeling and numerical simulation, so as to further consolidate the geological foundation of oilfield development.
Analysis of shortcoming of M-1 down hole problems dealing
Authors: Yang Sen , Yu Xiaogang
Published: September 2020

This article introduce M-1 down hole problems during drilling operation for analysis Operator’s fault when dealing with down hole problems. Through review the process of the first spud in, the second spud in and the third spud in, and give comment to each process and analysis what’s wrong with the operation. At last get a conclusion: The major mistakes is decision-making. After the second spud in, the situation of severe collapse and shrinkage of the upper formation and losses of the lower formation. At the third spud in, due to the low density of the mud, the water loss is high. For the control of the trajectory of the 8 1/2” wellbore, the decision maker is a bit ridiculous. Those summary will give other drilling contractors some experience whom will drill well in this block in the nearly future.
Reservoir energy response mechanism during shale gas accumulation in Longmaxi Formation
Authors: Tang X , Zhou TQ , Guo YC , Qiang Y , Zheng Z , Guo S
Published: September 2020

In order to explore the microscopic energy response mechanism of the shale gas accumulation process in the Longmaxi Formation, the energy balance theory is taken as the core. Based on the tectonic evolution and hydrocarbon generation history simulation, the elastic energy and gas elasticity of the Longmaxi Formation shale reservoir block are discussed. Can wait for energy response characteristics. It is meaningful to quantify the energy changes in the development of shale gas reservoirs. The results show that the accumulation of shale gas is controlled by the evolution of different energy systems in the geological history process. The accumulation of shale gas is controlled by the changing process of different energy systems in the geological history process;The dynamic balance of energy system changes the shale gas accumulation effect. The shale gas from the sedimentary-diagenetic-hydrocarbon generation stage, the gas reservoir energy mainly shows three major evolution stages.
Finite element analysis of building block ark stranded
Authors: Zeng Lingqi , Wang Yu
Published: September 2020

Using the direct calculation method based on the finite element theory, based on the reasonable creation of the finite element model, the ANSYS software is used to perform finite element analysis on the blockage of the ark of the building block. This article mainly uses the reef rocking condition of half-angle 45° For example, to simulate the damage of the hull to the hull under the extreme conditions by the stranded reef, and perform finite element analysis to improve the structure of the building block ark and improve the performance of the hull.
Analysis of the Position of the Reducer Intermediate Shaft’s Influence on Bearing Selection
Authors: Zhang Teng , Bailey Ben
Published: September 2020

The proper configuration of the bearing not only affects the internal structure and service life of the gearbox, but also determines the service life of the bearing itself. In this paper, through changing the angle formed by the input shaft and the intermediate shaft of two-stage reducer in the transverse position, the model was built for several times. the changes of bearing force, bearing damage degree and fatigue life under different conditions were compared and analyzed, and the optimal type of the intermediate bearing was selected according to the results.
Design and field test of hydraulic thruster
Authors: Zhao Jianjun , Cui Xiaojie
Published: September 2020

With the increase of inclination and friction in the process of drilling deep wells or highly deviated wells, the horizontal component of the gravity of drilling strings decreases continuously, causing difficulty in applying weight on bit and slow penetration, which cannot meet the urgent demand of improving the quality and efficiency of drilling. Therefore, a single-stroke two-stage hydraulic thruster has been proposed, which changes the traditional way of applying WOB by pushing the piston rod down by differential pressure between the annulus and the tool tube. The performance parameters of the tool have been obtained through the ground test, the sealing performance and structural strength are reliable, and the stretching motion is stable. The field application of hydraulic thruster has been carried out in well Tao-2-4-18A, and the results showed that the drilling rate increased by about 50% compared with that of adjacent wells in both the Zhifang formation and the Heshanggou formation. In addition, the flexible pressurized propulsion function of this tool could effectively protect the bit and reduce times of trips.
Study on the displacement characteristics of flue gas complex thermal fluid
Authors: Li Binfei , Zang Yunong , Wang Chengjian
Published: September 2020

One of the component of flue gas is CO2 which can cause environment problem, and flue gas-assisted heavy oil thermal recovery can significantly improve the effect of heavy oil development. Therefore, research on features of flue gas composite hot fluid flooding are of great significance. This paper used one-dimensional core tube experiments to reveal the evolution of the temperature field and displacement zone during the development of flue gas composite thermal fluids. At the same time, it monitored the displacement pressure variation under different methods, and clarified displacement characteristics and oil displacement efficiency. The results show that with the injection of flue gas, the heat spread ranges of steam zone and hot water zone are expanded, and the heat utilization rate is improved. Oil flooding efficiency and maximum oil recovery rate of cold water/hot water-flue gas flooding efficiency is higher than that of cold water/hot water which at the same temperature, and the oil displacement efficiency and maximum oil recovery rate is improved. The hot water/hot water-flue gas flooding pressure variation and stable pressure variation are lower than cold water/cold water-flue gas flooding at the same temperature. Oil displacement efficiency of flue gas composite hot fluid flooding is obviously higher than pure steam flooding.
Research on Laboratory Evaluation of Coalbed Methane Reservoir Water Blocking Damage Removal in Hancheng Block
Authors: Jiang Jianxun , Lu Mingchang , Feng Kun , Wang Fenglin
Published: September 2020

Owing to factors such as production system change, pump shutdown and workover, there was sudden drop in formation fluid velocity of coalbed methane well in Hancheng block, resulting in water blocking damage, the gas production plunged after the well was reopened. In order to remove the water blocking damage of coalbed methane reservoir, this paper integrated extensive survey, initially selected two nonionic surfactants (B4-B5) and three anionic surfactants (B1-B3) as the experimental subjects. The results showed that the mixed effect of B3 and B5 is the best. In order to further improve the formula system, the experimental study on the selection of auxiliaries was conducted, the results showed that under the premise of meeting environmental protection, ethanol could play a good role in reducing surface tension and defoaming, and the effect was best when the addition amount was 3%. The formula of coal seam water blocking agent PT was determined through the laboratory water-blocking evaluation experiment, and laid the foundation for the subsequent field test.
Approach for simulating natural gas consumption factor based on grey prediction method
Authors: Liu Yongquan , Diao Shujuan , Chang Yan
Published: September 2020

The natural gas consumption has changed significantly in last ten years in China. This paper conducted a series of evaluations to analyze the China natural gas consumption. By analyzing the natural gas consumption sector, three important sectors, Industrial, Residential and Transport, are chosen as the study objectives. The main application of these three factors were discussed and different determinants for each sector were chosen. Correlation factor of each determinant was then calculated through grey coefficients analysis to investigate the relationship between determinants and natural gas consumption. We hope this evaluation can help to provide better policy plan of natural gas consumption in China.
Pressure system adjustment technology before polymer injection in XX block
Authors: Zheng Yanru
Published: September 2020

There are two problems in the upward-return block: one is the insufficient testing and fracturing pockets; the other is the complex comprehensive adjustment. According to the pocket depth of test and fracturing requirements, combined with plugging cost, casing size of oil and water wells, development status of lower layers and length requirements of plugging intervals, the plugging mode is determined. According to permeability, effective thickness, injection-production perfection, injection pressure and subsidence, the comprehensive adjustment method is determined.
Research and adjustment methods in the mid-term of injection of salt-resistant polymer flooding
Authors: Li Yongchao
Published: September 2020

In order to maximize the ultimate recovery of the salt-resistant polymer flooding block, this paper analyzes the problems existing in the mid-phase of the polymer injection in the salt-resistant block and combines the dynamic data research to formulate the main methods for adjusting the salt-resistant polymer flooding stage. Suggestions for the next adjustment are provided, which provide reference for future adjustment of the same type of block.
New method of tapping potential of remaining oil after chemical flooding
Authors: Zhong Weiwei
Published: September 2020

In the study area, the chemical flooding type II oil layer and the water flooding type III oil layer exhibited alternating distribution in the horizon. The recovery factor during the chemical flooding stage was relatively low, at 7.44%, and had the potential for mining. Subsequent water flooding phases cannot use conventional potential tapping methods. It is necessary to further explore new targeted potential tapping methods and explore new ways for more cost-effective development. This study makes full use of dynamic data, fine reservoir description data and numerical modeling data to identify the remaining oil in the subsequent waterflooding stage, through coordinated adjustment of well patterns in the second and third types of oil layers, using unblocking, periodic production, reduced-speed oil production, and rotation Use wells and other methods to comprehensively tap potential and tap remaining oil.
Feasibility Study on Reservoir Layered Injection in Sabei Development Zone
Authors: Feng Han
Published: September 2020

Layered water injection is a method to solve the contradiction between layers in the process of oilfield development. It is an important method to achieve effective water injection, maintain the energy of the formation, maintain the long-term stable and high production of the oilfield, and improve the reserves and recovery rate of water drive. In the process of developing by layered water injection method, the common method for determining the distribution of each layer does not consider the distribution of remaining oil in the small layer. Based on the Weng’s cycle model and Logistic’s law of growth, this paper deduces the quantitative relationship between the production level and the cumulative volume of injected water. According to the distribution rules of remaining reserves in small layers, with the aim of improving the efficiency of water injection sweep and the utilization of remaining oil, a new model for calculating the reasonable injection volume of each layer in the layered injection well based on the distribution of remaining oil was established. The fine numerical simulation method was used to analyze the adaptability of the thickness method, the formation coefficient method and the remaining oil method for layered injection and each stage of the development of the oil field. The remaining oil method is recommended. The research results were applied on site in well group A of the water drive block in the Sabei Development Zone. The water content of the well group decreased by 1.5% and the average daily oil volume increased by 1.2t, indicating a new method of layered injection and the injection volume of each layer the research results of the suitability of the determination method can be used to guide the optimization adjustment of the injection volume of each layer of the injection well in the differentiated layer of the Sabei development.
Study on Mathematical Characterization and Numerical Simulation Method of Heavy Oil Chemical Combination Flooding Mechanism
Authors: Sun Zhixue , Wang Chuankang
Published: September 2020

Due to the difficulty in the exploitation of heavy oil, chemical flooding as a technology to enhance oil recovery has received extensive attention from the petroleum industry. In view of actual engineering needs, taking Jin 8 block as an example, the single variable method is used to optimize the injection-production parameters affecting heavy oil chemical combination flooding. The results show that the injection concentration is 0.6%, the slug ratio is 3:2, and the injection section. When the plug volume is 0.35PV, the development effect is better, which can provide theoretical guidance for the actual production of heavy oil reservoirs.
Research on the Tracking and Adjusting Method of Typical Well Group in the Second Class Reservoir
Authors: Cai Ming
Published: September 2020

The ternary compound flooding of the second-class oil layer has achieved good effects of increasing oil and dewatering in the field test. However, during the promotion process, the injection and production conditions are unstable. Seems particularly important. This paper selects the typical well group in the weak alkaline ternary compound flooding block of the second-class oil layer in a certain area, conducts potential analysis on the problems existing in development, strictly controls the injection quality at the injection end, and adopts measures such as sub-injection, parameter adjustment and fracturing Injection capacity, improve the utilization of the oil layer; the corresponding fracturing at the production end, improve the connection relationship, improve the utilization of the thin layer, maximize the potential of remaining oil, synchronize the tracking and adjustment methods at the injection and production ends to extend the fracturing During the stable period, the development effect of the well group is improved, which provides a technical basis for solving similar problems in the future, and can further improve the oil displacement efficiency of the ternary compound flooding.
Analysis on the changing law of sand body in narrow and small distributary channel after intensification
Authors: Wang Shengnan
Published: September 2020

Since the production test of Beizhong Block began in 1965, due to the need of development and adjustment, multiple sets of well patterns have been encrypted, such as primary encryption, secondary encryption, and triple encryption well patterns. Some new knowledge can be obtained on the distribution of the body. In order to improve the development effect of the oil field and further increase the recoverable reserves, in 2015, the reservoir was encrypted in the Beizhong block, and 163 wells were supplemented. The prediction accuracy and the analysis of the changes have made clear the changing laws of different types of sand bodies, and improved the understanding of the sand bodies.
Application Status and Prospect of Combined Treatment Technology for Oily Sludge in Domestic Oil Fields
Authors: Song Yang
Published: September 2020

The oily sludge has a wide range of sources and complex composition, the corresponding treatment technology and equipment also show a diversified trend, after the combined treatment of oily sludge, the oily sludge can meet the technical requirements of resource utilization and harmless treatment. Through the actual and literature research, the principle, scope, characteristics and development of the commonly used oily sludge treatment methods at home and abroad are summarized, the application status of several new oily sludge combined treatment technologies in China’s petrochemical enterprises is introduced, including sieving fluidization-tempering-mechanical dehydration technology, electrochemical bio-coupling advanced treatment technology, sludge centrifugal dewatering-superheated steam injection treatment technology, hot-washing coupling treatment technology and microbial-plant combined treatment technology, summarized whether the oil content of the residue after treatment by the existing treatment method meets the standard requirements of HJ 607-2011 “Technical Specifications for Pollution Control of Used Mineral Oil Recovery, Recycle and Reuse” and the resource utilization of the residue goes. The problems and treatment effects of the integrated oil sludge treatment technology in application have not yet been treated in a satisfactory manner to completely treat all oily sludge, and further research is needed.
Study on Gas Drainage Technology of High-level Borehole in Fully Mechanized Caving Face
Authors: Zhang Peng
Published: September 2020

In view of the problem of gas safety in fully mechanized caving face under complex geological conditions, taking high-level borehole gas extraction as the main gas control means to improve the extraction effect and ensure gas safety during mining, this paper takes 131301 fully mechanized caving face of Xinji No. 1 Coal Mine of Zhongmei as an example to study and analyze the layout of high-level borehole. Through the actual measurement, the gas concentration in the upper corner retaining wall is basically controlled below 0.2%, and in the return air lane is controlled below 0.08%, which shows that this method has achieved good gas drainage effect and ensured gas safety during mining.
Experimental study on cutting and sealing technology of drilling hole in bedding drainage
Authors: Zhang Yongjiang
Published: September 2020

Aiming at the problem that it is difficult to guarantee the quality of hole sealing and air leakage easily appear in bedding drilling of coal seam with high gas and low permeability, a new type of hole sealing process is put forward, which is assisted by cutting seam in the hole sealing section with the help of ultra-high pressure hydraulic cutting technology. Field tests show that, compared with the traditional “two blocks and one injection” sealing process, the initial concentration of gas extraction boreholes in the slit sealing process increases by 1.5~2 times, the extraction concentration increases by 2~3.5 times, and the gas extraction concentration exceeds 60% within 30 days.
Research on the optimization analysis and monitoring elements of tailings pond
Authors: Lu Zhanjin
Published: September 2020

This paper introduces how to select the monitoring elements scientifically, normatively and reasonably from the two links of monitoring elements and installation points of tailings dam. Based on ISM theory, the monitoring elements are systematically optimized, and obtains the corresponding monitoring model. According to the monitoring technical specifications of tailings dam and the analysis of safety risk factors in the whole life cycle, the layout of monitoring points of tailings dam is optimized, and a set of reasonable layout process is summarized, which provides theoretical guidance for the safety monitoring of the tailings dam.
Stress Shadow of fracture Law of Horizontal Well Seam Networks
Authors: Rui Yiming , Yang Chengbin
Published: September 2020

In order to improve the fracturing success rate and modification effect of multistage and multiple cluster volume fracturing in horizontal wells. This paper studies the theoretical model of crustal stress change caused by a single artificial fracture and also considers the superposition distribution model of the stress field. With the increasing net stress, the decrease of Poisson’s ratio, the degree of interference between fractures will become more significant. When fractures reach a certain period, the interference degree remains unchanged. The emphasis of the study lies in the basis for the optimization method of forming active volumetric fractures and establishes a reservoir.
Analysis of the characteristics of flue gas foam seepage and its influencing factors
Authors: Wang Chengjian , Li Binfei
Published: September 2020

The flue gas foam-assisted steam flooding technology is beneficial to inhibit the steam channeling, delay the steam overriding and improve the heat utilization rate. At the same time, it is also conducive to carbon dioxide storage, which has a broad application prospect. However, the current research on the seepage characteristics and influencing factors of flue gas foam-assisted steam flooding is insufficient. In this paper, the sand pack flooding experiments were carried out by changing the gas-liquid ratio, injection rate, temperature, permeability and other parameters. The results showed that in the case of low gas-liquid ratio, the number and size of foams are small and the connectivity between foams is poor. When the gas-liquid ratio is high, the gas-phase composition is high so that gas channeling occurs and the plugging effect is reduced. Experiments showed that when the gas-liquid ratio is 2:1, the resistance factor is the largest and the plugging performance is the best. When the injection rate is 3mL/min, the foam is stable, which is beneficial to the foam plugging. When the injection rate is lower than 3 mL/min, the foam is sparse and the foam liquid film is thin so that the plugging effect is poor. When the injection flow rate is higher than 3 mL/min, more foam with smaller size will be formed under the influence of shear action, and the Jamin effect on the pore throat will be weakened, which is difficult to be plugged by the foam system. With the increase of experimental temperature, the intermolecular force of the solution was strengthened, the foam volume was enlarged and the liquid film was thinned so that the foam stability and the plugging performance were weakened. Oil saturation has a greater impact on the plugging ability of the flue gas foam. The higher the oil saturation, the weaker the plugging ability is. The research can provide reference for the application of flue gas foam plugging technology.
Geological modeling of thin and poor reservoir based on well seismic multi-disciplinary
Authors: Zhang Wen , Wang Jiuxing , Li Zhandong , Qu Guohui
Published: September 2020

The reservoir physical properties of Tai X block are poor and the major development are thin and poor layers. The average porosity is 18.9% and the air permeability is 22.3×10−3μm2, the Tai X block is a low-permeability reservoir. The block has the characteristics of large area, large number of faults, dense distribution of small faults and complex intersection conditions. It is difficult to obtain a high accurate geological model by using only logging data or seismic data, resulting in inaccurate stratiraphic interpretation results. Therefore, the joint well-seismic technique is used to combine logging data with seismic data to achieve the purpose of accurately identifying faults and establishing complete reservoir structure, and successfully deployed a horizontal well across the fault.
Research on environment optimization system of mining operation area based on modern open-pit mine geological structure
Authors: Yan Shen , Fang Yu
Published: September 2020

After studying a large number of mining and excavation sites, the author of this article sampled and analysed the geological structure of the collection area. By comparing the soil geological structure, the degree of environmental damage caused by the excavation process was studied, and a variety of open-pit mine geological structures were analysed and studied. After analysing the relevant data, a modern open-pit mine geological structure of the mining operation area environment optimization system was established. This system can integrate the existing resources of the mine based on the analysis and restoration of ecological vegetation and enter the corresponding parameters., Can design a 3D landscape planning mottled corridor matrix spatial pattern model, combined with the current situation of abandoned land in mining and can be combined with corresponding landscape design strategies (such as artistic aesthetics), the system has the design points of modern engineering technology, in the beautification of the environment Utilizing the existing geological conditions to optimize the environment of the mining operation area has an important auxiliary role.
Study of influences of rock hardness on crack evolution rule under hydraulic fracturing
Authors: Liu Jialiang , Liu Yonghao , Zhu Yujie , Zhou Dongping , He Hua , Zhou Junjie , Wang Kai
Published: September 2020

In order to study the crack evolution rules of hydraulic fracturing rock with different hardness, a numerical model of hydraulic fracturing rock was established. It explored the expansion length, expansion width, propagation rate of crack and initiation pressure of hydraulic fracturing different hardness rocks. The results show that the expansion length, the propagation rate along length and the initiation pressure of crack were positively correlated with the rock hardness, and the expansion width and propagation rate along width were negatively correlated with the rock hardness. In addition, considering the effect of in-situ stress difference, it took granite as an example, and studied the effect of in-situ stress difference on crack propagation. It is found that as the in-situ stress difference increases, the initiation pressure of the crack decreases, and the crack expansion length and the propagation rate along length shows a linear increase, but it has little effect on the crack expansion width. The results can provide theoretical references for improving the application of hydraulic fracturing technology in hard rock excavation, such as the coal roadway excavation, the tunnel excavation and so on.
Rigid-Flexible Coupling Dynamics Simulation of Wedge Press
Authors: Li Qingdang , Li Shuaishuai , Wang Yu
Published: September 2020

In this paper, according to the installation and replacement process of disc single edge hob, the automatic disassembly process of the press wedge of hob is selected as the main object for analysis and research, and a press wedge disassembly device is proposed based on the mechanical design theory, and its structure design and simulation analysis are carried out. First of all, through the understanding of the development and research status of tool change technology at home and abroad, the structure of tool box and the disassembly process of disc hob are analyzed. The disassembly process is divided into three steps, and the expected path curve is obtained by cubic spline interpolation. Secondly, a kind of wedge removal device is proposed and designed. The design scheme is divided into two parts: wedge clamping mechanism and path guiding mechanism. The functional requirements and mechanism realization methods are discussed respectively. The wedge clamping mechanism realizes the clamping power by transforming the traditional three claw chuck, and the path guiding mechanism adopts the two degree of freedom mechanical arm to realize the wedge pressing along the expected curve path In order to verify its feasibility and rationality, the nx10.0 software is used to build the three-dimensional assembly model of the wedge removal device. Then, the trajectory planning simulation of the two degree of freedom manipulator is carried out, the manipulator model is established by using Matlab / Robotics toolbox, and the correctness of the kinematic equation is verified by comparative solution; the workspace of the manipulator is obtained by Monte Carlo simulation, and the correctness of the theoretical working area of the manipulator is verified by comparison; the method of quintic polynomial and cubic spline interpolation is adopted Methods the multi node trajectory planning of the manipulator joint was carried out, and the displacement, velocity and acceleration curves of the two joints of the manipulator were calculated based on the intermediate data points of the expected path, which verified the good motion stability of the manipulator. Finally, the virtual prototype model of the wedge removal device is established by the joint simulation method of Adams and ANSYS, and the rigid flexible coupling dynamic simulation analysis is carried out to simulate the movement track of the wedge in the removal process, which is basically consistent with the expected path curve, which verifies the feasibility of the removal device; the stress distribution of the connecting rod is evaluated and analyzed to verify that the connecting rod can meet the material requirements Material strength requirements.
Experimental Research on Rotation-Percussion Drilling of Diamond Bit Based on Stress Wave
Authors: Ding Yu , Tan Zhuoying , Li Shuguang
Published: September 2020

Rotary-percussive drilling is a common form of drilling in geotechnical engineering. in order to study the effect of rotational speed and impact speed on rock-breaking efficiency, a drilling simulation platform developed by ourselves and a drill pipe equipped with diamond bit were used to conduct simulated drilling experiments. By monitoring the stress wave during drilling, the strain, stress and energy changes at different rotational speeds and impact velocities can be obtained, and the optimal drilling parameters can be determined. The results show that both speed and impact velocity have direct influence on the drilling process. When the rotational speed is kept constant, the drilling efficiency increases first and then decreases with the increase of the impact velocity. When the impact velocity remains constant, the drilling efficiency decreases with the increase of rotating speed. With the increase of rotational speed, the optimal impact velocity also increases. It is helpful to improve the drilling efficiency by reasonable choice of speed and impact speed.
Effect of Silicone Waterproofing Agent on the Properties of Ceramic Recycled Aggregate Cement Mortar
Authors: Zhao Liang , Yao Shuang , Huang Xinyi , Liu Ting , Qin Fang
Published: September 2020

The ceramic waste were crushed and sieved to replace partially the sand to prepare cement mortar as aggregate, and different quality of silicone waterproofing agents were added to study the effects on the mechanical properties and water absorption under natural curing conditions. The experimental results indicated that through 28 days of natural curing, the flexural strength of ceramic recycled aggregate cement mortar was 1.18% higher than that of ordinary cement mortar, the compressive strength is 2.94% lower, the water absorption is 0.5% lower, which means the performance difference is not obvious. With the increasing amount of the silicone waterproofing agent, the compressive and flexural strength of the samples gradually decreased, and the water absorption decreased first and then increased. When the amount of waterproofing agent is 2%, the comprehensive performances of the sample were the best: the28-day flexural strength was 6.84 MPa, the compressive strength was 42.8MPa, and the water absorption was 4.66%.
Study on Hydrogeological Prospecting Technology of Healthy Environment for Urban Residents
Authors: Yang Xudong , Ji Lei , Yu Tianbo
Published: September 2020

Hydrogeological survey is the focus of environmental geological survey. Hydrogeological disasters have a greater impact and are closely related to the healthy living environment of residents. Understanding the actual situation of the hydrogeological environment through survey work can provide a reliable basis for disaster prevention and control. In this regard, the article will take hydrogeological survey as the research object, and conduct in-depth research on the content and main points of hydrogeological survey in environmental geological survey.
Tectonic Characteristics of the East Sichuan Basin and Regional Tectonic Evolution Characteristics of Regional Tectonic Belt
Authors: Zhang Ruigang , Luan Jinhua , Chen Yang , Chen Fei , Liu Yongwang
Published: September 2020

Most sedimentary basins in China have undergone multi-stage tectonic evolution. This paper takes the eastern Sichuan region as the research object and relies on modern geological research methods to systematically study the basin’s dynamic characteristics and tectonic evolution process in the eastern Sichuan region. The results show that the tectonic squeezing of SW and NW from the Daba Mountain orogenic belt and the Jiangnan-Xuefeng Mountain orogenic belt, respectively, make eastern Sichuan a complex structural interference zone that is both combined and compounded. The eastern Sichuan NE and NW structural combinations The type clearly records the structural transformation effect of the two. The history of tectonic evolution since the Middle Paleozoic in the eastern Sichuan Basin is divided into five phases: the deposition of source rocks of the Wufeng Formation-Longmaxi Formation in the Caledonian Period and the parallel unconformity contact with the overlying strata caused by the end of Silurian tectonic compression; Haixi The tectonic transformation of the Early-Indochina period is mainly manifested by the inheritance of the Caledonian period, and the interaction between the Devonian-Early Carboniferous strata and the early Indosinian marine facies and terrestrial sediments is lacking, and the fold deformation in the region is weak. In the early period, a series of NE-directional faults formed mainly in the eastern Sichuan region during the NNW-SSE compression. In the late Yanshan-Early Himalayan period, the NNW-SSE ~ NWW-SEE compression became stronger than in the early Yanshan period, and the eastern NE NE-boundary faults formed. In the late Himalayan period, NE-SW was squeezed. The Wujiang fault system at the border of the southeast of Sichuan was mainly formed during this period, and the southern strata were obviously transformed by this period.
Sequence stratigraphic division of the Shisanlitai Formation of Neoproterozoic in Southern Liaoning, China
Authors: Wu Zijie , Zhang Guoren , Gao Fuliang , Wang Haipeng , Qiu Longwei , Sun Qi , Yu Feng , Zhong Mishan
Published: September 2020

Sequence stratigraphy is the most important prediction theory in the field of petroleum exploration, and is hailed as a theoretical revolution in geology. At present, countries around the world have begun to pay attention to the study of marine carbonate rocks. The Shisanlitai Formation in Dalian, Liaoning is an important Neoproterozoic stratum in China, with a large number of carbonate rocks. Through comprehensive analysis of the field measured profiles, the sequence stratigraphy of the Shisanlitai Formation was studied. A total of 4 sequence boundary were identified, and 3 sequence, 7 para-sequence sets and 20 para-sequences were divided. It is considered that the Shisanlitai Formation is a platform marginal sedimentary facies. The regional geotectonic and astronomical cyclic methods are used to discuss the environmental evolution of the Ganjingzi Formation. Platform marginal beach → platform marginal slope → platform marginal reef evolution process, and summarized that there were 4 short exposures from the end of the Majiatun period to the Shisanlitai Formation period in the Dalian area affected by the low-amplitude tectonic ups and downs in the late Yangtze cycle 4 sequence boundary and 3 sequences are formed. Through comprehensive and systematic analysis of the sequence stratigraphy and sedimentary evolution of the Shisanlitai Formation, it provides a basis for exploring the oil and gas resources in southeastern Liaoning.
Seismic Sedimentary Technology and Its Application in Deposition Analysis of SQ7 in Shannan Region
Authors: Han Xiaofeng , Huang Yunfeng , Wei Lihua
Published: September 2020

The thickness of SQ7 sand body in Shannan area is thin, the lateral variation is fast, the distribution of sedimentary sand body is not clear, and the conventional sedimentary analysis method and reservoir prediction technology can not meet the requirements of fine oil and gas exploration. On the basis of the principle and research method of seismic sedimentology, the lithologic reversion of seismic profile was carried out by using 90° phasorization, and seismic sedimentology was carried out to study the plane distribution characteristics of SQ7 sand body in this area by using the technique of stratum isochronous section. Based on the analysis of seismic attribute sections and lithologic time sections under the equivalent time frame, the temporal and spatial evolution law and sedimentary microfacies of braided river delta deposits in the southern source system of the SQ7 period in this area are revealed. The distribution of sand body is described in detail, which provides the basis of seismic deposition for oil and gas exploration and deployment.