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200 Dead Oil Wells Go into Operation
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《China Oil & Gas》 CAS 1996年第2期112-112,共1页
200DeadOilWellsGointoOperation¥//Relyingontechnologicalprogresses,200deadoilwellswhichwereabandonedforyearsh... 200DeadOilWellsGointoOperation¥//Relyingontechnologicalprogresses,200deadoilwellswhichwereabandonedforyearshavebeenoverhauled... 展开更多
关键词 Dead oil wells Go into Operation
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Variability in Quantity and Salinity of Produced Water from an Oil Production in South Kuwait
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作者 Feras Al Salem Thies Thiemann 《Engineering(科研)》 2024年第1期8-23,共16页
Produced water (PW) is the largest waste stream in the oil and gas industry. Water remains trapped for millions of years in the reservoir with oil and gas. When a hydrocarbon reservoir is infiltrated by a production w... Produced water (PW) is the largest waste stream in the oil and gas industry. Water remains trapped for millions of years in the reservoir with oil and gas. When a hydrocarbon reservoir is infiltrated by a production well, the produced fluids commonly contain water. The understanding of this water’s constituents and volumes is vital for the sustainable continuity of production operations, as PW has a number of negative impacts on the infrastructure integrity of the operation. On the other hand, PW can be an alternative source of irrigation water as well as of industrial salt. Interestingly, both the quantity as well as the quality of PW do not remain constant but can vary, both progressively and erratically, even over short periods of time. This paper discusses such a situation of variable PW in an oil and gas operation in the State of Kuwait. 展开更多
关键词 Produced Water oil wells Water-Cut Salinity Fluctuation Total Dissolved Solids
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Multistring analysis of wellhead movement and uncemented casing strength in offshore oil and gas wells 被引量:7
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作者 Liu Xiuquan Chen Guoming +3 位作者 Chang Yuanjiang Zhang Lei Zhang Weiguo Xie Hua 《Petroleum Science》 SCIE CAS CSCD 2014年第1期131-138,共8页
This paper presents a theoretical method and a finite element method to describe wellhead movement and uncemented casing strength in offshore oil and gas wells.Parameters considered in the theoretical method include o... This paper presents a theoretical method and a finite element method to describe wellhead movement and uncemented casing strength in offshore oil and gas wells.Parameters considered in the theoretical method include operating load during drilling and completion and the temperature field,pressure field and the end effect of pressure during gas production.The finite element method for multistring analysis is developed to simulate random contact between casings.The relevant finite element analysis scheme is also presented according to the actual procedures of drilling,completion and gas production.Finally,field cases are presented and analyzed using the proposed methods.These are four offshore wells in the South China Sea.The calculated wellhead growths during gas production are compared with measured values.The results show that the wellhead subsides during drilling and completion and grows up during gas production.The theoretical and finite element solutions for wellhead growth are in good agreement with measured values and the deviations of calculation are within 10%.The maximum von Mises stress on the uncemented intermediate casing occurs during the running of the oil tube.The maximum von Mises stress on the uncemented production casing,calculated with the theoretical method occurs at removing the blow-out-preventer (BOP) while that calculated with the finite element method occurs at gas production.Finite element solutions for von Mises stress are recommended and the uncemented casings of four wells satisfy strength requirements. 展开更多
关键词 Offshore oil and gas wells drilling and completion gas production wellhead movement uncemented casing strength gap element
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Numbers of Oil Production Wells under CNPC
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《China Oil & Gas》 CAS 1996年第2期92-92,共1页
NumbersofOilProductionWellsunderCNPC¥//(AtYearEnd)cers.Thenumberofoilproductionwellsis20784inDaqingoilfields... NumbersofOilProductionWellsunderCNPC¥//(AtYearEnd)cers.Thenumberofoilproductionwellsis20784inDaqingoilfields.14367inShenglian... 展开更多
关键词 Numbers of oil Production wells under CNPC
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Intelligent Recognition Method of Insufficient Fluid Supply of Oil Well Based on Convolutional Neural Network 被引量:1
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作者 Yanfeng He Zhenlong Wang +2 位作者 Bin Liu Xiang Wang Bingchao Li 《Open Journal of Yangtze Oil and Gas》 2021年第3期116-128,共13页
Traditional methods for judging the degree of insufficient fluid supply in oil wells have low efficiency and limited accuracy. To address this problem, a method for intelligently identifying the degree of insufficient... Traditional methods for judging the degree of insufficient fluid supply in oil wells have low efficiency and limited accuracy. To address this problem, a method for intelligently identifying the degree of insufficient fluid supply in oil wells based on convolutional neural networks is proposed in this paper. Firstly, 5000 indicator diagrams with insufficient liquid supply were collected from the oilfield site, and a sample set was established after preprocessing;then based on the AlexNet model, combined with the characteristics of the indicator diagram, a convolutional neural network model including 4 layers of convolutional layers, 3 layers of down-pooling layers and 2 layers of fully connected layers is established. The backpropagation, ReLu activation function and dropout regularization method are used to complete the training of the convolutional neural network;finally, the performance of the convolutional neural network under different iteration times and network structure is compared, and the super parameter optimization of the model is completed. It has laid a good foundation for realizing the self-adaptive and intelligent matching of oil well production parameters and formation fluid supply conditions. It has certain application prospects. The results show that the accuracy of training and verification of the method exceeds 98%, which can meet the actual application requirements on site. 展开更多
关键词 Degree of Insufficient Fluid Supply in oil wells Indicator Diagram Convolutional Neural Network Alexnet Backpropagation Algorithm ReLu Activation Function Dropout Regularization
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Progress and Development Direction of “Three-High” Oil and Gas Well Testing Technology 被引量:1
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作者 Bo Zhang Fayon Yuan +3 位作者 Hao Su Ming Cao Ruifeng Guo Chenxiang Sun 《Journal of Power and Energy Engineering》 2022年第6期1-13,共13页
By reviewing the development of “three-high” oil and gas well testing technology of Sinopec in recent years, this paper systematically summarizes the application of “three-high” oil and gas well testing technology... By reviewing the development of “three-high” oil and gas well testing technology of Sinopec in recent years, this paper systematically summarizes the application of “three-high” oil and gas well testing technology of Sinopec in engineering optimization design technology, and high temperature and high pressure testing technology, high pressure and high temperature transformation completion integration technology. Major progress has been made in seven aspects: plug removal and re-production technology of production wells in high acid gas fields;wellbore preparation technology of ultra-deep, high-pressure, and high-temperature oil and gas wells;surface metering technology;and supporting tool development technology. This paper comprehensively analyzes the challenges faced by the “three-high” oil and gas well production testing technology in four aspects: downhole tools, production testing technology, safe production testing, and the development of low-cost production test tools. Four development directions are put forward: 1) Improve ultra-deep oil and gas testing technology and strengthen integrated geological engineering research. 2) Deepen oil and gas well integrity evaluation technology to ensure the life cycle of oil and gas wells. 3) Carry out high-end, customized, and intelligent research on oil test tools to promote the low-cost and efficient development of ultra deep reservoirs. 4) Promote the fully automatic control of the surface metering process to realize the safe development of “three-high” reservoirs. 展开更多
关键词 “Three-High” oil and Gas wells oil Test Geological Engineering Integra-tion Intelligent Downhole Tools
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Reduction behavior and kinetics of vanadium–titanium sinters under high potential oxygen enriched pulverized coal injection 被引量:1
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作者 Jin-fang Ma Guang-wei Wang +4 位作者 Jian-liang Zhang Xin-yu Li Zheng-jian Liu Ke-xin Jiao Jian Guo 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第5期493-503,共11页
In this work, the reduction behavior of vanadium–titanium sinters was studied under five different sets of conditions of pulverized coal injection with oxygen enrichment. The modified random pore model was establishe... In this work, the reduction behavior of vanadium–titanium sinters was studied under five different sets of conditions of pulverized coal injection with oxygen enrichment. The modified random pore model was established to analyze the reduction kinetics. The results show that the reduction rate of sinters was accelerated by an increase of CO and H2contents. Meanwhile, with the increase in CO and H2contents, the increasing range of the medium reduction index (MRE) of sinters decreased. The increasing oxygen enrichment ratio played a diminishing role in improving the reduction behavior of the sinters. The reducing process kinetic parameters were solved using the modified random role model. The results indicated that, with increasing oxygen enrichment, the contents of CO and H2in the reducing gas increased. The reduction activation energy of the sinters decreased to between 20.4 and 23.2 kJ/mol. © 2017, The Author(s). 展开更多
关键词 Activation energy COAL Injection (oil wells) Kinetic parameters KINETICS OXYGEN Pulverized fuel SINTERING TITANIUM VANADIUM
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A proposed NMR solution for multi-phase flow fluid detection 被引量:5
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作者 Jun-Feng Shi Feng Deng +7 位作者 Li-Zhi Xiao Hua-Bing Liu Feng-Qin Ma Meng-Ying Wang Rui-Dong Zhao Shi-Wen Chen Jian-Jun Zhang Chun-Ming Xiong 《Petroleum Science》 SCIE CAS CSCD 2019年第5期1148-1158,共11页
In the petroleum industry,detection of multi-phase fluid flow is very important in both surface and down-hole measurements.Accurate measurement of high rate of water or gas multi-phase flow has always been an academic... In the petroleum industry,detection of multi-phase fluid flow is very important in both surface and down-hole measurements.Accurate measurement of high rate of water or gas multi-phase flow has always been an academic and industrial focus.NMR is an efficient and accurate technique for the detection of fluids;it is widely used in the determination of fluid compositions and properties.This paper is aimed to quantitatively detect multi-phase flow in oil and gas wells and pipelines and to propose an innovative method for online nuclear magnetic resonance(NMR)detection.The online NMR data acquisition,processing and interpretation methods are proposed to fill the blank of traditional methods.A full-bore straight tube design without pressure drop,a Halbach magnet structure design with zero magnetic leakage outside the probe,a separate antenna structure design without flowing effects on NMR measurement and automatic control technology will achieve unattended operation.Through the innovation of this work,the application of NMR for the real-time and quantitative detection of multi-phase flow in oil and gas wells and pipelines can be implemented. 展开更多
关键词 oil and gas wells Multi-phase flow NMR Online detection
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MATHEMATICAL AND COMPUTER SIMULATION TECHNOLOGY OF CONDENSATE OIL AND GAS WELLS STIMULATED BY ELECTROMAGNETIC HEATING 被引量:2
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作者 PU Chun-sheng PEI Run-you +2 位作者 HUANG Hai FENG Jin-de SU Guo-hui 《Journal of Hydrodynamics》 SCIE EI CSCD 2007年第3期292-302,共11页
In this article, the recent research achievements on the theory and technology of condensate oil and gas wells stimulated by electromagnetic induction heating during middle or late exploitation period were introduced ... In this article, the recent research achievements on the theory and technology of condensate oil and gas wells stimulated by electromagnetic induction heating during middle or late exploitation period were introduced for the first time at home and abroad. A new kind of electromagnetic wave induction heating equipment XAEMH-1 was developed. Taking near wellbore zone temperature field as the main research object, which is the key factor for the condensation and retrograde vaporization during electromagnetic heating, the mathematical simulation model for a condensate oil and gas well stimulated by electromagnetic heating to eliminate blockage near wellbore region was established. A corresponding computer system was developed to dynamically predict and evaluate the efficiency of this electromagnetic heating process. Through this computer system, the near wellbore region distributions of several important factors such as temperature, pressure, condensate oil saturation and relative permeability can be described quantitatively. A condensate gas well in a late exploitation period reservoir here in China was chosen as a practical example to test the effectiveness of this new technology and some satisfactory results were obtained. These results proved that it is feasible to eliminate the near wellbore region blockage by electromagnetic heating. A new prospective stimulation method was given for the condensate oil and gas reservoirs during middle or late exploitation period. 展开更多
关键词 Condensate oil and gas wells electromagnetic heating stimulation mathematical and computer simulation
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Experimental study and field application of appropriate selective calculation methods in gas lift design 被引量:2
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作者 Afshin Davarpanah Behnam Mirshekari 《Petroleum Research》 2018年第3期239-247,共9页
The most common way to achieve an enormous production rate of a reservoir is to increase drawdown pressure during the production procedure by decreasing the bottom-hole pressure.This process was done by artificial pat... The most common way to achieve an enormous production rate of a reservoir is to increase drawdown pressure during the production procedure by decreasing the bottom-hole pressure.This process was done by artificial patterns like a gas lift.Nowadays,most of the wells worldwide due to years of production and reducing the amount of energy which was supplied by natural drive mechanisms are being placed on artificial lift methodologies.Hence,the number of wells that used this method will continue to increase.The primary purposes in the gas lift design of a wellbore are to determine the proper depths and the location of valve installation,select appropriate flow regime during the pipeline and calibrate the pressures of the operating and unloading valves.The purpose of this research is to design gas lift system in the oil wells of on the south fields of Iran by considering the maximum production connate water volume of 40 percent and average pressure drop(20-25 psia)throughout the year regarding production continuously or increasing the flow rate of the wells.Therefore,20 wells that their number starts A to T with this locations L280N,W115S and W002S are the candidates for gas lift procedures.Furthermore,the appropriate flow regimes through the well are being studied,and the most proper method for gas lifting and required surficial equipment will be designed for this field.Consequently,due to increasing the volume of gas and connate water among the production after gas lifting,fundamental changes on the equipment,flow regimes and gas lift system are being proposed that production will be done by proper engineering method.In the well gas lift design,Beggs&Brill Revised method is being selected for hydraulic calculation of pipeline flow due to low errors. 展开更多
关键词 Gas lift design Natural drive mechanism Flow regime oil wells Operating valves
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Artificial intelligence method for predicting the maximum stress of an off-center casing under non-uniform ground stress with support vector machine 被引量:2
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作者 DI QinFeng WU ZhiHao +4 位作者 CHEN Tao CHEN Feng WANG WenChang QIN GuangXu CHEN Wei 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2020年第12期2553-2561,共9页
The situation of an off-center casing under non-uniform ground stress can occur in the process of drilling a salt-gypsum formation,and the related casing stress calculation has not yet been solved analytically. In add... The situation of an off-center casing under non-uniform ground stress can occur in the process of drilling a salt-gypsum formation,and the related casing stress calculation has not yet been solved analytically. In addition,the experimental equipment in many cases cannot meet the actual conditions and the experimental cost is very high. These comprehensive factors cause the existing casing design to not meet the actual conditions and cause casing deformation,affecting the drilling operation in Tarim oil field. The finite element method is the only effective method to solve this problem at present,but the re-modelling process is time-consuming because of the changes in the parameters,such as the cement properties,casing centrality,and the casing size. In this article,an artificial intelligence method based on support vector machine(SVM) to predict the maximum stress of an offcenter casing under non-uniform ground stress has been proposed. After a program based on a radial basis function(RBF)-support vector regression(SVR)(ε-SVR) model was established and validated,we constructed a data sample with a capacity of 120 by using the finite element method,which could meet the demand of the nine-factor ε-SVR model to predict the maximum stress of the casing. The results showed that the artificial intelligence prediction method proposed in this manuscript had satisfactory prediction accuracy and could be effectively used to predict the maximum stress of an off-center casing under complex downhole conditions. 展开更多
关键词 support vector machine maximum stress off-center casing non-uniform ground stress oil and gas wells
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