考虑平面连通差异的杏六区西部注水细分标准
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摘要
杏六区西部进入特高含水开发期后,剩余油分布零散,油层动用状况极不均衡。为了减缓目前开发存在的矛盾,以矿场资料和数值模拟资料为基础,研究纵向和平面影响因素对注水开发效果的影响,应用灰色关联分析方法确定注水开发效果的主要影响因素及其权重,然后根据油水井在各层中实际生产关系,确定考虑平面连通差异的细分注水体系和标准,并应用数值模拟方法分析细分标准实施前后开发效果和油层动用状况变化。研究结果表明,影响注水开发效果的主要因素为渗透率变异系数、平面相接触关系差异因子、平面渗透率突进系数差异因子、层段砂岩厚度和单卡层段油层数,权重依次为0.22、0.21、0.20、0.18、0.19。细分注水标准为:①单卡层段油层数小于6个;②层段单卡砂岩厚度小于6 m;③渗透率变异系数低于0.51;④平面相接触关系差异因子小于0.26;⑤平面渗透率突进系数差异因子小于0.53。新标准建立后含水上升速度略有降低,预测采收率为48.51%,与老标准相比提高了0.35%。研究成果为改善注水开发效果和注水层段合理划分调整提供了依据。
After West Block Xing-6 entering the period of ultra-high water cut, the remained oil is rather scattered and oil reservoirs are extremely uneven developed. In order to alleviate the existing contradictions of the development, on the bases of the field data and numerical simulation data, the influences of the vertical and horizontal influencing factors on the water flooding development effect were studied, and with the help of grey correlation analyzing method, the main influencing factors and their weights of water flooding development effect were determined. Then according to the actual production relationships of the oil and water wells in each layer, the subdividing system and standards were made sure considering the planar connectivity difference. And moreover the numerical simulating method was used to analyze the changes of the development effect and reservoir developed conditions before and after the implementation of the subdividing standards. The study results show that the main factors of influencing the waterflooding effect are permeability variation coefficient, difference factor of the planar-facies contact relationship, difference factor of the planar permeability breakthrough coefficient, interval sandstone thickness and single-grip-interval oil layer number, their weights are 0.22, 0.21, 0.20, 0.18 and 0.19. The subdividing standards: ① less than 6 single-grip-interval oil layer numbers; ②less than 6 m single-grip-interval sandstone thickness; ③less than 0.51 permeability variation coefficient; ④less than 0.26 difference factor of the planar-facies contact relationship; ⑤less than 0.53 difference factor of the planar permeability breakthrough coefficient. After the new standards established, the rise rate of the water cut drops a bit, the predicted recovery is 48.51%, compared with the old standards, the recovery is higher by 0.35%. The study results can provide the evidences for improving the development effects of the water flooding and reasonable division and adjustment of the water injecting intervals.
After West Block Xing-6 entering the period of ultra-high water cut, the remained oil is rather scattered and oil reservoirs are extremely uneven developed. In order to alleviate the existing contradictions of the development, on the bases of the field data and numerical simulation data, the influences of the vertical and horizontal influencing factors on the water flooding development effect were studied, and with the help of grey correlation analyzing method, the main influencing factors and their weights of water flooding development effect were determined. Then according to the actual production relationships of the oil and water wells in each layer, the subdividing system and standards were made sure considering the planar connectivity difference. And moreover the numerical simulating method was used to analyze the changes of the development effect and reservoir developed conditions before and after the implementation of the subdividing standards. The study results show that the main factors of influencing the waterflooding effect are permeability variation coefficient, difference factor of the planar-facies contact relationship, difference factor of the planar permeability breakthrough coefficient, interval sandstone thickness and single-grip-interval oil layer number, their weights are 0.22, 0.21, 0.20, 0.18 and 0.19. The subdividing standards: ① less than 6 single-grip-interval oil layer numbers; ②less than 6 m single-grip-interval sandstone thickness; ③less than 0.51 permeability variation coefficient; ④less than 0.26 difference factor of the planar-facies contact relationship; ⑤less than 0.53 difference factor of the planar permeability breakthrough coefficient. After the new standards established, the rise rate of the water cut drops a bit, the predicted recovery is 48.51%, compared with the old standards, the recovery is higher by 0.35%. The study results can provide the evidences for improving the development effects of the water flooding and reasonable division and adjustment of the water injecting intervals.
引文
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[7]赵鑫,刘月田,丁耀,等.海上油田优势水流通道模糊综合识别模型[J].断块油气田,2017,24(1):91-95.ZHAO Xin,LIU Yuetian,DING Yao,et al.Fuzzy comprehensive recognition model of dominant water channels in offshore oilfield[J].Fault-Block Oil & Gas Field,2017,24(1):91-95.
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[9]邸士莹,缪立南,肖继健.利用测试资料指导厚油层细分提高注水效率[J].石油仪器,2014,28(4):54-57.DI Shiying,MIAO Linan,XIAO Jijian.Application of test data to guide the subdivision of thick oil layer to improve water injection efficiency[J].Petroleum Instruments,2014,28(4):54-57.
[10]白敬妍.浅析水井多级细分与浅调剖措施在杏九区西部精细分层注水试验区应用效果[J].中国石油和化工标准与质量,2014,34(7):186.BAI Jingyan.Analysis on the application effect of multistage subdivision and shallow zoning of wells in the west of xingjiu district[J].China Petroleum and Chemical Standard and Quality,2014,34(7):186.
[11]徐杨,张涛,梁聪,等.致密油藏细分注水的模糊数学模型[J].陕西科技大学学报,2017,35(3):111-115.XU Yang,ZHANG Tao,LIANG Cong,et al.Layered injection wells distinguished by fuzzy mathematics method in tight reservoirs[J].Journal of Shaanxi University of Science & Technology,2017,35(3):111-115.
[12]袁庆峰.认识油田开发规律科学合理开发油田[J].大庆石油地质与开发,2004,23(5):60-67.YUAN Qingfeng.Understanding oilfield development rule,scientifically and reasonably developing oilfields[J].Petroleum Geology & Oilfield Development in Daqing,2004,23(5):60-67.
[13]冯其红,王波,王相,等.高含水油藏细分注水层段组合优选方法研究[J].西南石油大学学报(自然科学版),2016,38(2):186.FENG Qihong,WANG Bo,WANG Xiang,et al.Study on layer combination optimization method of subdivision water injection in high water-cut reservoirs[J].Journal of Southwest Petroleum University(Science & Technology Edition),2016,38(2):186.
[14]赵辉,李阳,高达,等.基于系统分析方法的油藏井间动态连通性研究[J].石油学报,2010,31(4):633-636.ZHAO Hui,LI Yang,GAO Da,et al.Research on reservoir interwell dynamic connectivity using systematic analysis method[J].Acta Petrolei Sinica,2010,31(4):633-636.
[15]黄伏生,赵永胜.高含水期砂岩油田细分注水最佳分级模拟研究[J].大庆石油地质与开发,1998,17(2):30-53.HUANG Fusheng,ZHAO Yongsheng.Study on the best grade simulation of water injection in sandstone oilfield in high water bearing period[J].Petroleum Geology & Oilfield Development in Daqing,1998,17(2):30-53.
[16]唐亮,殷艳玲,张贵才.注采系统连通性研究[J].石油与天然气学报,2008,30(4):134-136.TANG Liang,YIN Yanling,ZHANG Guicai.Study on connectivity of an injection-production system[J].Journal of Oil and Gas Technology,2008,30(4):134-136.
[17]王任一.基于生产动态数据的井间储层连通性识别方法[J].石油与天然气地质,2019,40(2):443-450.WANG Renyi.An approach to recognize interwell reservoir connectivity based on production data[J].Oil & Gas Geology,2019,40(2):443-450.
[18]谢华,王凤.细分注水方法的研究[J].油气田地面工程,2007,26(2):8-9.XIE Hua,WANG Feng.Study on the method of segmenting water injection[J].Oil-Gasfield Surface Engineering,2007,26(2):8-9.
[19]许家峰,张金庆,安桂荣,等.国内海上注水开发油田注采系统调整潜力[J].大庆石油地质与开发,2016,35 (6):53-56.XU Jiafeng,ZHANG Jinqing,AN Guirong,et al.Potentials of the injection-production system adjustment for China offshore water-flooded oilfields [J].Petroleum Geology & Oilfield Development in Daqing,2016,35 (6):53-56.
[20]胡罡,田选华,刘全稳,等.胜利断块油藏细分注水技术界限研究[J].数学的实践与认识,2017,47(3):102-113.HU Gang,TIAN Xuanhua,LIU Quanwen,et al.Study on technology policy limitation of subdivision water injection complex fault block reservoirs of Shengli Oilfield[J].Mathematics in Practice and Theory,2017,47(3):102-113.
[21]周锡生,赵玉武,郑晓旭,等.龙虎泡油田高含水期注水开发调整技术[J].大庆石油地质与开发,2015,34 (1):51-55.ZHOU Xisheng,ZHAO Yuwu,ZHENG Xiaoxu,et al.Water flooding adjustment techniques for Longhupao Oilfield at high-watercut stage[J].Petroleum Geology & Oilfield Development in Daqing,2015,34 (1):51-55.
[22]王玥.喇萨杏油田细分注水改善开发效果探讨[J].长江大学学报(自然科学版),2013,10(26):140-143.WANG Yue.Discussion on development effect of segment water injection in Lamadian,Sartu and Xingshugang Oilfields[J].Journal of Yangtze University (Natural Science Edition),2013,10(26):140-143.
[23]尹淑敏.分流河道砂体注水开发过程储层参数变化特征[J].大庆石油地质与开发,2015,34 (4):69-72.YIN Shumin.Variation characteristics of the reservoir parameters in the development course of the water flooding for the distributary channel sandbodies[J].Petroleum Geology & Oilfield Development in Daqing,2015,34 (4):69-72.
[2]朱亚婷.基于单砂体的低渗透砾岩油藏细分注水政策研究[J].重庆科技学院学报(自然科学版),2017,19(4):13-17.ZHU Yating.Study on subdivision water injection policy of low permeability conglomerate reservoir based on the research of single sand body[J].Journal of Chongqing University of Science and Technology (Natural Sciences Edition),2017,19(4):13-17.
[3]赵辉,康志江,孙海涛,等.水驱开发多层油藏井间连通性反演模型[J].石油勘探与开发,2016,43(1):99-106.ZHAO Hui,KANG Zhijang,SUN Haitao,et al.An interwell connectivity inversion model for waterflooded multilayer reservoirs[J].Petroleum Exploration and Development,2016,43(1):99-106.
[4]陈荣芹.复杂断块油藏细分注水开发方案优化研究[J].断块油气田,2006,13(1):29-30.CHEN Rongqin.Optimization study on the development plan of subdivision injection in the complicated fault block reservoir[J].Fault-Block Oil & Gas Field,2006,13(1):29-30.
[5]林立.特高含水期细分注水层段组合参数优化[J].中国石油和化工标准与质量,2019,5(3):103-104.LIN Li.Optimization of combination parameters of subdivision of injection water layer in super high water containing period[J].China Petroleum and Chemical Standard and Quality,2019,5(3):103-104.
[6]赖书敏.特高含水后期油藏细分注水界限研究:以胜利油田整装油藏为例[J].岩性油气藏,2018,30(5):124-130.LAI Shumin.Technology policy limitation of subdivision water injection in ultra-high water cut stage:A case from Shengli uncompartmentalized reservoirs[J].Lithologic Reservoirs,2018,30(5):124-130.
[7]赵鑫,刘月田,丁耀,等.海上油田优势水流通道模糊综合识别模型[J].断块油气田,2017,24(1):91-95.ZHAO Xin,LIU Yuetian,DING Yao,et al.Fuzzy comprehensive recognition model of dominant water channels in offshore oilfield[J].Fault-Block Oil & Gas Field,2017,24(1):91-95.
[8]劳斌斌,刘月田,屈亚光,等.多层复杂断块油藏开发策略研究[J].断块油气田,2010,17(3):348-350.LAO Binbin,LIU Yuetian,QU Yaguang,et al.Development strategy of complicated fault block reservoir with multiple layers[J].Fault-Block Oil & Gas Field,2010,17(3):348-350.
[9]邸士莹,缪立南,肖继健.利用测试资料指导厚油层细分提高注水效率[J].石油仪器,2014,28(4):54-57.DI Shiying,MIAO Linan,XIAO Jijian.Application of test data to guide the subdivision of thick oil layer to improve water injection efficiency[J].Petroleum Instruments,2014,28(4):54-57.
[10]白敬妍.浅析水井多级细分与浅调剖措施在杏九区西部精细分层注水试验区应用效果[J].中国石油和化工标准与质量,2014,34(7):186.BAI Jingyan.Analysis on the application effect of multistage subdivision and shallow zoning of wells in the west of xingjiu district[J].China Petroleum and Chemical Standard and Quality,2014,34(7):186.
[11]徐杨,张涛,梁聪,等.致密油藏细分注水的模糊数学模型[J].陕西科技大学学报,2017,35(3):111-115.XU Yang,ZHANG Tao,LIANG Cong,et al.Layered injection wells distinguished by fuzzy mathematics method in tight reservoirs[J].Journal of Shaanxi University of Science & Technology,2017,35(3):111-115.
[12]袁庆峰.认识油田开发规律科学合理开发油田[J].大庆石油地质与开发,2004,23(5):60-67.YUAN Qingfeng.Understanding oilfield development rule,scientifically and reasonably developing oilfields[J].Petroleum Geology & Oilfield Development in Daqing,2004,23(5):60-67.
[13]冯其红,王波,王相,等.高含水油藏细分注水层段组合优选方法研究[J].西南石油大学学报(自然科学版),2016,38(2):186.FENG Qihong,WANG Bo,WANG Xiang,et al.Study on layer combination optimization method of subdivision water injection in high water-cut reservoirs[J].Journal of Southwest Petroleum University(Science & Technology Edition),2016,38(2):186.
[14]赵辉,李阳,高达,等.基于系统分析方法的油藏井间动态连通性研究[J].石油学报,2010,31(4):633-636.ZHAO Hui,LI Yang,GAO Da,et al.Research on reservoir interwell dynamic connectivity using systematic analysis method[J].Acta Petrolei Sinica,2010,31(4):633-636.
[15]黄伏生,赵永胜.高含水期砂岩油田细分注水最佳分级模拟研究[J].大庆石油地质与开发,1998,17(2):30-53.HUANG Fusheng,ZHAO Yongsheng.Study on the best grade simulation of water injection in sandstone oilfield in high water bearing period[J].Petroleum Geology & Oilfield Development in Daqing,1998,17(2):30-53.
[16]唐亮,殷艳玲,张贵才.注采系统连通性研究[J].石油与天然气学报,2008,30(4):134-136.TANG Liang,YIN Yanling,ZHANG Guicai.Study on connectivity of an injection-production system[J].Journal of Oil and Gas Technology,2008,30(4):134-136.
[17]王任一.基于生产动态数据的井间储层连通性识别方法[J].石油与天然气地质,2019,40(2):443-450.WANG Renyi.An approach to recognize interwell reservoir connectivity based on production data[J].Oil & Gas Geology,2019,40(2):443-450.
[18]谢华,王凤.细分注水方法的研究[J].油气田地面工程,2007,26(2):8-9.XIE Hua,WANG Feng.Study on the method of segmenting water injection[J].Oil-Gasfield Surface Engineering,2007,26(2):8-9.
[19]许家峰,张金庆,安桂荣,等.国内海上注水开发油田注采系统调整潜力[J].大庆石油地质与开发,2016,35 (6):53-56.XU Jiafeng,ZHANG Jinqing,AN Guirong,et al.Potentials of the injection-production system adjustment for China offshore water-flooded oilfields [J].Petroleum Geology & Oilfield Development in Daqing,2016,35 (6):53-56.
[20]胡罡,田选华,刘全稳,等.胜利断块油藏细分注水技术界限研究[J].数学的实践与认识,2017,47(3):102-113.HU Gang,TIAN Xuanhua,LIU Quanwen,et al.Study on technology policy limitation of subdivision water injection complex fault block reservoirs of Shengli Oilfield[J].Mathematics in Practice and Theory,2017,47(3):102-113.
[21]周锡生,赵玉武,郑晓旭,等.龙虎泡油田高含水期注水开发调整技术[J].大庆石油地质与开发,2015,34 (1):51-55.ZHOU Xisheng,ZHAO Yuwu,ZHENG Xiaoxu,et al.Water flooding adjustment techniques for Longhupao Oilfield at high-watercut stage[J].Petroleum Geology & Oilfield Development in Daqing,2015,34 (1):51-55.
[22]王玥.喇萨杏油田细分注水改善开发效果探讨[J].长江大学学报(自然科学版),2013,10(26):140-143.WANG Yue.Discussion on development effect of segment water injection in Lamadian,Sartu and Xingshugang Oilfields[J].Journal of Yangtze University (Natural Science Edition),2013,10(26):140-143.
[23]尹淑敏.分流河道砂体注水开发过程储层参数变化特征[J].大庆石油地质与开发,2015,34 (4):69-72.YIN Shumin.Variation characteristics of the reservoir parameters in the development course of the water flooding for the distributary channel sandbodies[J].Petroleum Geology & Oilfield Development in Daqing,2015,34 (4):69-72.