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A Comparison Study between the Newly Developed Vertical Wells Steam Assisted Gravity Drainage and the Conventional SAGD Process
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作者 M. Shirif A. Alarbah +1 位作者 H. Ibrahim E. Shirif 《Engineering(科研)》 2017年第6期575-590,共16页
A numerical simulation study using the CMG-STAR Simulator was performed to compare the performance of the newly developed process (VWSAGD) utilizing vertical wells to enhance heavy oil recovery during steam assisted g... A numerical simulation study using the CMG-STAR Simulator was performed to compare the performance of the newly developed process (VWSAGD) utilizing vertical wells to enhance heavy oil recovery during steam assisted gravity drainage against the conventional steam assisted gravity drainage process which utilized horizontal wells (HWSAGD) under the same operating conditions. Two identical reservoir models were simulated for the two processes using 3-Dimensional, black heavy oil model (14° API). Each reservoir type consists of 49 × 49 × 20 grid blocks on a 5-acre model, which incorporated a typical heavy oil reservoir rock and fluid properties taken from the SPE case study, stspe001.dat (CMG 2015 release). A sensitivity analysis for both processes was performed for the grid density, soaking time, steam quality, bottom hole producing pressure, steam injection rate, reservoir thickness, reservoir area, and horizontal to vertical permeability anisotropy. More preferable reservoir conditions are those such as high horizontal to vertical permeability ratio, thick reservoir oil zones, as well as improved reservoir recovery for the VWSAGD process. Under unfavorable conditions such as thin reservoir oil zones, an improved reservoir recovery response was limited for the VWSAGD process and could be uneconomical in real field cases. Finally, the simulation results from this study include cumulative recoveries, Steam oil ratios, produced water-oil ratios, pressure and temperature distributions, and production rates. In addition, the results from this study have shown that the new VWSAGD process is more favorable than the conventional HWSAGD process. 展开更多
关键词 Ertical WELLS Steam assisted gravity drainage CONVENTIONAL SAGD PROCESS
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Models of steam-assisted gravity drainage(SAGD) steam chamber expanding velocity in double horizontal wells and its application
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作者 ZHOU You LU Teng +3 位作者 WU Shouya SHI Lanxiang DU Xuan WANG Junling 《Petroleum Exploration and Development》 2019年第2期347-354,共8页
The development of steam chamber can be used to evaluate steam-assisted gravity drainage(SAGD) performance. The velocity of steam chamber expanding is the key parameter for evaluating the development of steam chamber.... The development of steam chamber can be used to evaluate steam-assisted gravity drainage(SAGD) performance. The velocity of steam chamber expanding is the key parameter for evaluating the development of steam chamber. Based on SAGD technology theory and heat transfer theory, two calculation model methods, observation well temperature method and steam chamber edge method for estimating the horizontal expanding velocity of steam chamber, were presented. Through analyzing the monitoring data and numerical simulation results of a typical super heavy oil block developed by SAGD in Fengcheng oilfield in Xinjiang, NW China, the development patterns of steam chamber and temperature variation law in the observation well at different stages are determined. The observed temperature data was used to calculate steam chamber expanding velocity. The calculated chamber velocity at different time was applied to predict the temperature distribution of oil drainage zone at the edge of steam chamber and SAGD oil rate. The results indicate that temperature function of high temperature zone in the observation well temperature curve has a linear relationship with measuring depth.The characteristic section can be used to calculate key parameters such as the angle of the drainage interface, expanding edge and velocity of steam chamber. The field production data verify that the results of the two proposed methods of steam chamber growth are reliable and practical, which can provide theoretical support for the efficient development of SAGD. 展开更多
关键词 steam-assisted gravity drainage observation well temperature STEAM CHAMBER STEAM CHAMBER EXPANDING VELOCITY oil drainage zone
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Deterministic tools to predict gas assisted gravity drainage recovery factor
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作者 Maryam Hasanzadeh Mohammad Madani 《Energy Geoscience》 EI 2024年第3期24-38,共15页
Naturally fractured rocks contain most of the world's petroleum reserves.This significant amount of oil can be recovered efficiently by gas assisted gravity drainage(GAGD).Although,GAGD is known as one of the most... Naturally fractured rocks contain most of the world's petroleum reserves.This significant amount of oil can be recovered efficiently by gas assisted gravity drainage(GAGD).Although,GAGD is known as one of the most effective recovery methods in reservoir engineering,the lack of available simulation and mathematical models is considerable in these kinds of reservoirs.The main goal of this study is to provide efficient and accurate methods for predicting the GAGD recovery factor using data driven techniques.The proposed models are developed to relate GAGD recovery factor to the various parameters including model height,matrix porosity and permeability,fracture porosity and permeability,dip angle,viscosity and density of wet and non-wet phases,injection rate,and production time.In this investigation,by considering the effective parameters on GAGD recovery factor,three different efficient,smart,and fast models including artificial neural network(ANN),least square support vector machine(LSSVM),and multi-gene genetic programming(MGGP)are developed and compared in both fractured and homogenous porous media.Buckinghamπtheorem is also used to generate dimensionless numbers to reduce the number of input and output parameters.The efficiency of the proposed models is examined through statistical analysis of R-squared,RMSE,MSE,ARE,and AARE.Moreover,the performance of the generated MGGP correlation is compared to the traditional models.Results demonstrate that the ANN model predicts the GAGD recovery factor more accurately than the LSSVM and MGGP models.The maximum R^(2)of 0.9677 and minimum RMSE of 0.0520 values are obtained by the ANN model.Although the MGGP model has the lowest performance among the other used models(the R2 of 0.896 and the RMSE of 0.0846),the proposed MGGP correlation can predict the GAGD recovery factor in fractured and homogenous reservoirs with high accuracy and reliability compared to the traditional models.Results reveal that the employed models can easily predict GAGD recovery factor without requiring complicate governing equations or running complex and time-consuming simulation models.The approach of this research work improves our understanding about the most significant parameters on GAGD recovery and helps to optimize the stages of the process,and make appropriate economic decisions. 展开更多
关键词 Gas assisted gravity drainage Recovery factor Deterministic tools Statistical evaluation
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CO2 assisted steam flooding in late steam flooding in heavy oil reservoirs 被引量:1
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作者 XI Changfeng QI Zongyao +7 位作者 ZHANG Yunjun LIU Tong SHEN Dehuang MU Hetaer DONG Hong LI Xiuluan JIANG Youwei WANG Hongzhuang 《Petroleum Exploration and Development》 2019年第6期1242-1250,共9页
To improve the oil recovery and economic efficiency in heavy oil reservoirs in late steam flooding,taking J6 Block of Xinjiang Oilfield as the research object,3D physical modeling experiments of steam flooding,CO2-foa... To improve the oil recovery and economic efficiency in heavy oil reservoirs in late steam flooding,taking J6 Block of Xinjiang Oilfield as the research object,3D physical modeling experiments of steam flooding,CO2-foam assisted steam flooding,and CO2 assisted steam flooding under different perforation conditions are conducted,and CO2-assisted steam flooding is proposed for reservoirs in the late stage of steam flooding.The experimental results show that after adjusting the perforation in late steam flooding,the CO2 assisted steam flooding formed a lateral expansion of the steam chamber in the middle and lower parts of the injection well and a development mode for the production of overriding gravity oil drainage in the top chamber of the production well;high temperature water,oil,and CO2 formed stable low-viscosity quasi-single-phase emulsified fluid;and CO2 acted as a thermal insulation in the steam chamber at the top,reduced the steam partial pressure inside the steam chamber,and effectively improved the heat efficiency of injected steam.Based on the three-dimensional physical experiments and the developed situation of the J6 block in Xinjiang Oilfield,the CO2 assisted steam flooding for the J6 block was designed.The application showed that the CO2 assisted steam flooding made the oil vapor ratio increase from 0.12 to 0.16 by 34.0%,the oil recovery increase from 16.1%to 21.5%,and the final oil recovery goes up to 66.5%compared to steam flooding after perforation adjustment. 展开更多
关键词 heavy oil reservoir three-dimensional physical simulation experiment STEAM FLOODING CO2 assisted STEAM FLOODING STEAM CHAMBER steam(CO2)chamber overriding gravity drainage
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新疆油田浅层超稠油SAGD高效低碳开发技术研究与展望 被引量:2
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作者 孙新革 罗池辉 +2 位作者 张胜飞 张文胜 罗双涵 《特种油气藏》 CAS CSCD 北大核心 2024年第1期1-8,共8页
针对“双碳”目标背景下超稠油开发高能耗与油田高质量发展矛盾日益加剧的问题,新疆油田通过SAGD机理研究与现场实践,在维持蒸汽腔高效扩展,突破储层渗流屏障遮挡,提高浅薄层驱泄复合效率,实现水平井长水平段高效均衡产液等方面持续攻关... 针对“双碳”目标背景下超稠油开发高能耗与油田高质量发展矛盾日益加剧的问题,新疆油田通过SAGD机理研究与现场实践,在维持蒸汽腔高效扩展,突破储层渗流屏障遮挡,提高浅薄层驱泄复合效率,实现水平井长水平段高效均衡产液等方面持续攻关,取得显著效果。采用气体辅助技术,实现蒸汽腔隔热保压增能,油汽比可提高20%;利用立体井网及储层升级扩容技术,改善Ⅲ类超稠油油藏渗流特征,泄油速度可增大20%~40%;采用全密闭生产方式,VHSD产液温度由100℃上升至150℃,采油速度提高50%;深化热采流量控制器(FCD)机理研究,完善油藏-井筒耦合优化设计方法,水平井水平段动用程度可提高20%。“十四五”期间,新疆油田将深化溶剂辅助SAGD、无水SAGD和控温水热裂解等技术研究,逐步完善浅层超稠油低碳高效开发技术系列,该研究可为稠油油藏开发提供借鉴。 展开更多
关键词 浅层超稠油 重力泄油 驱泄复合 气体辅助 储层扩容 低碳开发技术
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基于时移微重力监测技术的SAGD蒸汽腔扩展规律研究
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作者 郑爱萍 刘欢 +4 位作者 黄后传 赵婧含 杨登杰 马建强 李玄 《新疆石油地质》 CAS CSCD 北大核心 2024年第6期680-686,共7页
为揭示稠油油藏蒸汽辅助重力泄油(SAGD)蒸汽腔扩展规律,利用时移微重力监测技术,对新疆重油油田H井区侏罗系齐古组稠油油藏的蒸汽腔扩展规律进行研究。通过时移微重力监测获取了反映油藏剩余密度的剩余重力异常数据,利用该数据进行三维... 为揭示稠油油藏蒸汽辅助重力泄油(SAGD)蒸汽腔扩展规律,利用时移微重力监测技术,对新疆重油油田H井区侏罗系齐古组稠油油藏的蒸汽腔扩展规律进行研究。通过时移微重力监测获取了反映油藏剩余密度的剩余重力异常数据,利用该数据进行三维最小二乘反演,确定了蒸汽腔的纵向分布,并提出了解释蒸汽腔扩展规律与剩余重力异常关系的方法。该方法能够有效解释H井区5个井组蒸汽腔的扩展规律,把蒸汽腔的演变过程划分为上升阶段、横向扩展阶段及向下扩展阶段,并利用井温监测验证了该方法的准确性与可靠性。该方法揭示了SAGD蒸汽腔在油藏中的扩展规律,为稠油油藏的高效开发提供了技术支持,有助于优化稠油油藏的生产调控措施,也为同类型油藏开发提供了理论和实践基础。 展开更多
关键词 稠油油藏 时移微重力 蒸汽辅助重力泄油 蒸汽腔 扩展规律 重力异常 剩余密度
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苏北盆地江苏油田CO_(2)驱油技术进展及应用
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作者 唐建东 王智林 葛政俊 《油气藏评价与开发》 CSCD 北大核心 2024年第1期18-25,F0002,共9页
CCUS(碳捕集、利用与封存)技术对绿色低碳转型、实现“双碳”目标意义重大,而CO_(2)驱油埋存是其重要内容。苏北盆地江苏油田针对复杂断块油藏提高采收率的技术瓶颈开展CO_(2)驱油技术攻关及多种类型矿场试验,形成了以重力稳定驱、驱吐... CCUS(碳捕集、利用与封存)技术对绿色低碳转型、实现“双碳”目标意义重大,而CO_(2)驱油埋存是其重要内容。苏北盆地江苏油田针对复杂断块油藏提高采收率的技术瓶颈开展CO_(2)驱油技术攻关及多种类型矿场试验,形成了以重力稳定驱、驱吐协同等为特点的复杂断块油藏CO_(2)驱油的4种差异化模式,成功开展了花26断块“仿水平井”重力稳定驱等技术先导试验,建成了10×10^(4) t的复杂断块油藏CCUS示范工程。江苏油田累计注入液碳量30.34×10^(4) t,累计增油量9.83×10^(4) t,实现了较好的增产效果及经济效益。技术研究及试验可为其他复杂断块油藏的CO_(2)驱开发提供参考借鉴。 展开更多
关键词 复杂断块 CO_(2)驱油模式 重力稳定驱 提高采收率 CO_(2)封存
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Oil production rate predictions for steam assisted gravity drainage based on high-pressure experiments 被引量:2
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作者 GUO Jia ZAN Cheng +1 位作者 MA DeSheng SHI Lin 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第2期324-334,共11页
Dual-well steam assisted gravity drainage(SAGD) has significant potential for extra-heavy oil recovery.China is conducting two dual-well SAGD pilot projects in the Fengcheng extra-heavy oil reservoir.Quick,direct pred... Dual-well steam assisted gravity drainage(SAGD) has significant potential for extra-heavy oil recovery.China is conducting two dual-well SAGD pilot projects in the Fengcheng extra-heavy oil reservoir.Quick,direct predictions of the oil production rate by algebraic models rather than complex numerical models are of great importance for designing and adjusting the SAGD operations.A low-pressure scaled physical simulation was previously used to develop two separate theoretical models corresponding to the two different growth stages observed in the SAGD steam chambers,which are the steam chamber rising stage and the steam chamber spreading stage.A high-pressure scaled model experiment is presented here for one dual-well SAGD pattern to further improve the prediction models to reasonably predict oil production rates for full production.Parameters that significantly affect the oil recovery during SAGD were scaled for the model size based on the reservoir characteristics of the Fengcheng reservoir in China.Experimental results show the relationship between the evolution of the steam chamber and the oil production rate during the entire production stage.High-pressure scaled model test was used to improve the gravity drainage models by modifying empirical factors for the rising model and the depletion model.A new division of the SAGD production regime was developed based on the relationship between the oil production rate and the evolution of steam chamber.A method was developed to couple the rising and depletion models to predict oil production rates during the SAGD production,especially during the transition period.The method was validated with experiment data and field data from the literature.The model was then used to predict the oil production rate in the Fengcheng reservoir in China and the Athabasca reservoir in Canada. 展开更多
关键词 extra-heavy oil steam assisted gravity drainage (SAGD) physical simulation theoretical model
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Predicting the performance of steam assisted gravity drainage (SAGD) method utilizing artificial neural network (ANN) 被引量:1
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作者 Areeba Ansari Marco Heras +2 位作者 Julianne Nones Mehdi Mohammadpoor Farshid Torabi 《Petroleum》 CSCD 2020年第4期368-374,共7页
As the price of oil decreases,it is becoming increasingly important for oil companies to operate in the most costeffective manner.This problem is especially apparent in Western Canada,where most oil production is depe... As the price of oil decreases,it is becoming increasingly important for oil companies to operate in the most costeffective manner.This problem is especially apparent in Western Canada,where most oil production is dependent on costly enhanced oil recovery(EOR)techniques such as steam-assisted gravity drainage(SAGD).Therefore,the goal of this study is to create an artificial neural network(ANN)that is capable of accurately predicting the ultimate recovery factor of oil reservoirs by steam-assisted gravity drainage(SAGD).The developed ANN model featured over 250 unique entries for oil viscosity,steam injection rate,horizontal permeability,permeability ratio,porosity,reservoir thickness,and steam injection pressure collected from literature.The collected data set was entered through a feed-forward back-propagation neural network to train,validate,and test the model to predict the recovery factor of SAGD method as accurate as possible.Results from this study revealed that the neural network was able to accurately predict recovery factors of selected projects with less than 10%error.When the neural network was exposed to a new simulation data set of 64 points,the predictions were found to have an accuracy of 82%as measured by linear regression.Finally,the feasibility of ANN to predict the recovery performance of one of the most complicated enhanced heavy oil recovery techniques with reasonable accuracy was confirmed. 展开更多
关键词 Enhanced oil recovery Steam assisted gravity drainage Artificial neural network
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Study of reservoir properties and operational parameters influencing in the steam assisted gravity drainage process in heavy oil reservoirs by numerical simulation 被引量:2
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作者 Farshad Dianatnasab Mohammad Nikookar +1 位作者 Seyednooroldin Hosseini Morteza Sabeti 《Petroleum》 2016年第3期236-251,共16页
This study was originally aimed at suggesting a two-dimensional program for the Steam Assisted Gravity Drainage(SAGD)process based on the correlations proposed by Heidari and Pooladi,using the MATLAB software.In fact,... This study was originally aimed at suggesting a two-dimensional program for the Steam Assisted Gravity Drainage(SAGD)process based on the correlations proposed by Heidari and Pooladi,using the MATLAB software.In fact,the work presented by Chung and Butler was used as the basis for this study.Since the steam chamber development process and the SAGD production performance are functions of reservoir properties and operational parameters,the new model is capable of analyzing the effects of parameters such as height variation at constant length,length variation at constant height,permeability variation,thermal diffusivity coefficient variation and well location on the production rate and the oil recovery among which,the most important one is the thermal diffusivity coefficient analysis.To investigate the accuracy and authenticity of the model outcomes,they were compared with the results obtained by Chung and Butler.The privilege of this method over that proposed by Heidari and Pooladi lies in its ability to investigate the effect of thermal diffusivity coefficient on recovery and analyzing the effect of temperature distribution changes on thickness diffusivity.Based on the observations,results reveal that the proposed model gives more accurate predictions compared to the old model proposed by Chung&Butler. 展开更多
关键词 Simulation Steam assisted gravity drainage(SAGD) Heat profile Thermal diffusivity coefficient Bitumen recovery
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泡沫协同注气重力驱提高采收率实验
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作者 陈小龙 《大庆石油地质与开发》 CAS 北大核心 2024年第5期123-131,共9页
针对泡沫协同注气重力驱(GAGD)提高采收率效果及机理认识不清的问题,通过三维物理模拟岩心驱替实验,研究泡沫与注气重力驱的协同增油效果;采用大尺寸微观模型开展微观驱替实验,分析油、气、泡沫间的驱替关系与驱油机制。从宏、微观角度... 针对泡沫协同注气重力驱(GAGD)提高采收率效果及机理认识不清的问题,通过三维物理模拟岩心驱替实验,研究泡沫与注气重力驱的协同增油效果;采用大尺寸微观模型开展微观驱替实验,分析油、气、泡沫间的驱替关系与驱油机制。从宏、微观角度,全面揭示泡沫与GAGD组合驱的驱油潜力。结果表明:泡沫与GAGD组合驱替方式可以有效解决GAGD气窜后产油量急剧下降的问题,组合驱岩心实验采收率高达59.4%,远高于GAGD岩心实验采收率(44.9%);气体突破后注泡沫时机越早,泡沫与GAGD组合驱的驱替效果越好;注入泡沫量越多,泡沫与GAGD组合驱效果越好,但这种增幅作用会随着注入量的增多逐渐减小;泡沫与GAGD组合驱的微观驱油机制表现为泡沫封堵主要流动通道,而非主流通道内的泡沫“遇油消泡”,泡沫在孔隙中会残留表面活性剂溶液,形成气-表面活性剂-油模式下的多重驱替方式,将GAGD扩大波及体积的作用与表面活性剂提高驱油效率的作用相结合,协同增效,极大地提高了原油采收率。研究成果为泡沫协同注气重力驱的技术优化与矿场实践提供了依据。 展开更多
关键词 重力气驱 泡沫驱 微观驱替 采收率
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基于非稳态热传导的SAGD开发指标预测模型 被引量:3
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作者 丁超 王攀 +4 位作者 秦亚东 梁向进 郑爱萍 李宁 邢向荣 《岩性油气藏》 CAS CSCD 北大核心 2023年第1期160-168,共9页
根据传热学和热采理论,利用程序设计的方法,对考虑边界效应的SAGD(蒸汽辅助重力泄油)非稳态热传导模型和开发关键指标解析解及开发指标的快速预测进行了研究。研究结果表明:(1)现有的非稳态热传导模型对传热外边界的温度假设存在局限性... 根据传热学和热采理论,利用程序设计的方法,对考虑边界效应的SAGD(蒸汽辅助重力泄油)非稳态热传导模型和开发关键指标解析解及开发指标的快速预测进行了研究。研究结果表明:(1)现有的非稳态热传导模型对传热外边界的温度假设存在局限性,根据能量守恒原理修正传热外边界条件,建立传热深度与累积传热量的解析关系,可定量计算上覆和下伏地层的热损失;(2)在巴特勒经典SAGD产量模型基础上,推导的蒸汽腔上升及横向扩展阶段和下压阶段的产水量、油汽比和蒸汽热利用率等解析模型,可实现SAGD特定开发阶段或全生命周期开发关键指标的快速预测;(3)通过与实际指标对比,井组生产6.4 a预测油汽比和含水率的符合率均在95%以上,证实了解析模型和程序设计的可靠性;(4)根据准噶尔盆地风城油田重32井区油藏参数,预测分析的不同油层厚度条件下SAGD蒸汽热利用率和关键开发指标表明,蒸汽热利用率大于35%、油汽比大于0.15对应油层厚度应大于12 m。 展开更多
关键词 非稳态传热 SAGD 热损失 蒸汽热利用率 油汽比 重32井区 风城油田 准噶尔盆地
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重力泄水辅助蒸汽驱开采机理及油藏工程设计 被引量:1
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作者 李培武 曹峻博 +3 位作者 张崇刚 李鑫 杨光璐 李迎环 《大庆石油地质与开发》 CAS 北大核心 2023年第4期99-104,共6页
针对辽河油田稠油区块蒸汽吞吐后期产量低、转换开发方式难度大的问题,按照“垂向泄水提高热效率、直平采液提高采注比、水平井注汽提干度、注采泄稳定控制扩波及”的技术思路,开展重力泄水辅助蒸汽驱油藏工程研究,进一步明确开采机理... 针对辽河油田稠油区块蒸汽吞吐后期产量低、转换开发方式难度大的问题,按照“垂向泄水提高热效率、直平采液提高采注比、水平井注汽提干度、注采泄稳定控制扩波及”的技术思路,开展重力泄水辅助蒸汽驱油藏工程研究,进一步明确开采机理并明确了各阶段开发特征,并对油藏工程关键参数进行优化设计。研究表明:采用上下叠置水平井与直井组合的立体井网,实现了平面蒸汽驱替、垂向重力泄水的渗流模式;重力泄水辅助蒸汽驱立体井网可为蒸汽腔的形成创造良好的条件,有效缓解了深层、特-超稠油埋藏深、沿程热损失大造成的井底蒸汽干度低、注采不同平衡等系列矛盾;重力泄水辅助蒸汽驱可划分为直井、水平井井间热连通,重力泄水辅助蒸汽驱驱替阶段和蒸汽驱调整3个阶段;重力泄水辅助蒸汽驱现场试验取得较好的开发效果,预计汽驱结束采收率可达到58.6%,为深层-特深层稠油开发方式转换提供了新途径。研究成果为同类油藏进一步提高采收率提供了借鉴。 展开更多
关键词 重力泄水辅助蒸汽驱 深层稠油 水平井 注采参数
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加拿大油砂非凝析气体辅助SAGD开采特征及影响因素研究 被引量:1
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作者 张艳玉 王欣 +3 位作者 孙晓飞 王成胜 孙君 任树亮 《河南理工大学学报(自然科学版)》 CAS 北大核心 2023年第3期10-17,共8页
常规SAGD开采蒸汽超覆现象严重、蒸汽腔发育不均匀、后期开发效果差,非凝析气体辅助SAGD开采即SAGP(steam and gas push)可有效改善SAGD开发效果,但SAGP开采机理、开发特征和影响因素仍未完全明确。采用室内实验和数值模拟相结合方法,揭... 常规SAGD开采蒸汽超覆现象严重、蒸汽腔发育不均匀、后期开发效果差,非凝析气体辅助SAGD开采即SAGP(steam and gas push)可有效改善SAGD开发效果,但SAGP开采机理、开发特征和影响因素仍未完全明确。采用室内实验和数值模拟相结合方法,揭示SAGP开采机理,明确蒸汽腔发育、剩余油分布等开发特征,探讨非凝析气体类型、注入方式、注入时机等因素的影响规律。结果表明:非凝析气体可降低稠油黏度和储层顶部热量损失速率,从而提高稠油可流动性和蒸汽热利用效率;SAGP过程中利用二氧化碳的辅助效果优于甲烷和氮气,尽早注入非凝析气体可形成“椭圆形”蒸汽腔;非凝析气体注入速率为4000 m^(3)/d时效果最好,超过该值非凝析气体会抑制蒸汽腔发育;采用段塞式注入非凝析气体效果优于连续式注入方式,最优段塞长度为2个月。研究结果对于加拿大油砂SAGP高效开发具有重要意义。 展开更多
关键词 加拿大油砂 蒸汽辅助重力泄油 非凝析气体 数值模拟 技术机理 开发特征
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不同成因岩溶储集体氮气辅助重力驱实验 被引量:1
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作者 程洪 《新疆石油地质》 CAS CSCD 北大核心 2023年第5期613-617,共5页
针对塔河油田储集体复杂特点和中—下部剩余油动用难题,结合地质信息和建模结果,构建了考虑储集体类型、裂缝分布及裂缝-缝洞组合关系的储集体剖面模型,开展了表层岩溶储集体、古暗河储集体和断溶储集体的驱替实验,并对油气水多相流动... 针对塔河油田储集体复杂特点和中—下部剩余油动用难题,结合地质信息和建模结果,构建了考虑储集体类型、裂缝分布及裂缝-缝洞组合关系的储集体剖面模型,开展了表层岩溶储集体、古暗河储集体和断溶储集体的驱替实验,并对油气水多相流动进行可视化分析;研究了氮气辅助重力驱前后的剩余油赋存状态,对比了不同成因岩溶储集体采收率提高程度。结果表明:对于不同成因的岩溶储集体,氮气辅助重力驱均有助于实现均衡驱替,但不同成因岩溶储集体高采收率程度存在差异,断溶储集体、表层岩溶储集体和古暗河储集体原油采收率分别提高12%、9%和7%;有助于明确储集体类型对氮气辅助重力驱的影响,为缝洞型油藏提高采收率技术发展提供支持。 展开更多
关键词 塔河油田 碳酸盐岩储集层 缝洞型油藏 岩溶储集体 氮气辅助重力驱 剩余油 提高采收率
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超稠油油藏直井与水平井组合SAGD技术研究 被引量:71
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作者 刘尚奇 王晓春 +2 位作者 高永荣 杨立强 由世江 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2007年第2期234-238,共5页
辽河油田曙一区杜84块兴隆台油层兴Ⅵ组为厚层块状超稠油油藏,50℃下脱气原油黏度大于100Pa.s。针对该油藏的地质特征、原油性质与开发现状,分析了直井与水平井组合蒸汽辅助重力泄油(SAGD)技术的适应性,在现有直井已吞吐多个周期、地层... 辽河油田曙一区杜84块兴隆台油层兴Ⅵ组为厚层块状超稠油油藏,50℃下脱气原油黏度大于100Pa.s。针对该油藏的地质特征、原油性质与开发现状,分析了直井与水平井组合蒸汽辅助重力泄油(SAGD)技术的适应性,在现有直井已吞吐多个周期、地层压力已大幅下降的情况下,应用数值模拟技术研究了直井与水平井组合SAGD技术的水平井部署方式并对SAGD注采参数进行了优化。研究结果表明,直井与水平井组合SAGD技术是杜84块兴Ⅵ油层组超稠油油藏蒸汽吞吐后的有效接替技术,可提高原油采收率30%,累计油汽比可达到0.296。最佳的布井方式为水平生产井在两排垂直井中间,且位于侧下方,垂向距离为20m,水平井段长度为280m;井底注汽干度必须大于70%,且生产井排液速度必须与注汽井注汽速度相匹配。 展开更多
关键词 超稠油 接替技术 蒸汽辅助重力泄油(SAGD) 水平井
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二氧化碳气体辅助SAGD物理模拟实验 被引量:27
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作者 张运军 沈德煌 +3 位作者 高永荣 李军辉 李杰 刘岩 《石油学报》 EI CAS CSCD 北大核心 2014年第6期1147-1152,共6页
为进一步提高蒸汽辅助重力泄油(SAGD)的开发效果,针对辽河油田杜84块馆陶组超稠油油藏SAGD开采的现状,采用二维物理模拟技术,开展了通过添加CO2气体改善SAGD开发效果的机理及技术可行性实验。实验研究结果表明:CO2气体辅助SAGD开发杜84... 为进一步提高蒸汽辅助重力泄油(SAGD)的开发效果,针对辽河油田杜84块馆陶组超稠油油藏SAGD开采的现状,采用二维物理模拟技术,开展了通过添加CO2气体改善SAGD开发效果的机理及技术可行性实验。实验研究结果表明:CO2气体辅助SAGD开发杜84块馆陶组超稠油油藏在技术上是可行的,超稠油SAGD过程中添加的CO2气体具有非凝析气和溶剂的双重作用机理;从CO2气体辅助SAGD实验的温度场发育数据来看,CO2气体有利于SAGD蒸汽腔的侧向扩展,增加蒸汽的横向波及体积;添加的CO2气体使SAGD的采收率、油/汽比及采油速度都明显提高。同时,进一步研究了添加的CO2气体量对SAGD开发效果的影响程度,初步优化出CO2气体与蒸汽的最佳注入比例为20%。 展开更多
关键词 超稠油油藏 二氧化碳 蒸汽辅助重力泄油 CO2气体辅助 物理模拟
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氮气辅助SAGD开采技术优化研究 被引量:48
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作者 高永荣 刘尚奇 +1 位作者 沈德煌 郭二鹏 《石油学报》 EI CAS CSCD 北大核心 2009年第5期717-721,共5页
利用物理模拟及数值模拟方法,研究了在蒸汽辅助重力泄油(SAGD)过程中添加氮气提高顶水超稠油油藏开发效果的生产机理,主要包括:形成隔热层,降低热损失,提高热效率;维持系统压力,改善流度比;降低原油黏度,提高流动能力。优选出了氮气... 利用物理模拟及数值模拟方法,研究了在蒸汽辅助重力泄油(SAGD)过程中添加氮气提高顶水超稠油油藏开发效果的生产机理,主要包括:形成隔热层,降低热损失,提高热效率;维持系统压力,改善流度比;降低原油黏度,提高流动能力。优选出了氮气注入方式、氮气与蒸汽比和氮气总注入量。研究结果表明,氮气辅助SAGD开采技术在杜84块馆陶油层开采中是可行的,有利于蒸汽腔的侧向扩展,增加蒸汽的横向波及体积;在SAGD过程中添加氮气能够有效控制顶水下泄,延长SAGD生产时间3~4年,提高了油藏采收率和油汽比。 展开更多
关键词 超稠油 顶水油藏 蒸汽超覆 氮气 蒸汽辅助重力泄油(SAGD)
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超稠油直井-水平井组合蒸汽辅助重力泄油物理和数值模拟 被引量:73
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作者 杨立强 陈月明 +1 位作者 王宏远 田利 《中国石油大学学报(自然科学版)》 EI CAS CSCD 北大核心 2007年第4期64-69,共6页
研究了中深层超稠油油藏在直井蒸汽吞吐中后期,用直井注汽水平井采油的方式转蒸汽辅助重力泄油(steam as-sisted gravity drainage,SAGD)开发的机理。应用高温高压比例物理模拟方法,研究了水平井布于直井斜下方时SAGD蒸汽腔的形成和扩... 研究了中深层超稠油油藏在直井蒸汽吞吐中后期,用直井注汽水平井采油的方式转蒸汽辅助重力泄油(steam as-sisted gravity drainage,SAGD)开发的机理。应用高温高压比例物理模拟方法,研究了水平井布于直井斜下方时SAGD蒸汽腔的形成和扩展过程。结果表明,转SAGD的初期以蒸汽驱动作用为主并逐步向重力泄油作用过渡,并可划分为蒸汽吞吐预热、驱替泄油、稳定泄油、衰竭开采4个开采阶段。利用数值模拟优选了布井方式、井网井距、水平井段长度、转SAGD时机和注采参数。该模拟方法在辽河油田杜84块超稠油油藏开发中取得了较好的现场试验效果。 展开更多
关键词 SAGD 超稠油 物理模拟 数值模拟 蒸汽吞吐
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水平井火驱辅助重力泄油燃烧前缘展布与调控 被引量:19
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作者 梁金中 关文龙 +3 位作者 蒋有伟 席长丰 王伯军 李晓玲 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2012年第6期720-727,共8页
通过三维物理模拟实验研究水平井火驱辅助重力泄油过程中不同阶段燃烧前缘和结焦带的展布规律,并分析各阶段燃烧前缘稳定推进机理及影响因素。燃烧前缘的扩展可分为点火启动、径向扩展和向前推进3个阶段。点火启动阶段,油层上部最先实... 通过三维物理模拟实验研究水平井火驱辅助重力泄油过程中不同阶段燃烧前缘和结焦带的展布规律,并分析各阶段燃烧前缘稳定推进机理及影响因素。燃烧前缘的扩展可分为点火启动、径向扩展和向前推进3个阶段。点火启动阶段,油层上部最先实现点火,点火温度、点火时间和注气速率是该阶段的关键操作参数。径向扩展阶段,燃烧前缘呈"漏斗状"继续向四周和下部扩展,此时调控的关键在于注气速率与燃烧前缘的面积相匹配。燃烧前缘推进到水平井趾端射孔段后,以一定的倾角朝水平井跟部方向推进,超覆式燃烧和结焦带对水平井筒的封堵是该阶段实现稳定泄油的重要原因。在矿场试验中,应从井网模式、点火参数和注采制度等方面采取优化措施来维持燃烧前缘的稳定推进。 展开更多
关键词 火驱辅助重力泄油 水平井 燃烧前缘 展布特征 物理模拟
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