bluuebunny/crossref_metadata_2025_split huggingface dataset:
Impact of Oilfield Operating Cost Splitting Ratio on the Evaluation of Listed Developed Reserves
Authors: Yang Jixiang 
Published: September 2020

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.