水平井同井注采技术
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摘要
针对中高渗透油藏、致密油藏水平井开采过程中存在注水见效不明显、裂缝水窜等问题,设计了3种致密油藏水平井井下注采控制装置,提出了水平井同井注采工艺,并分析了油藏适应性。对于中高渗透油藏高含水水平井,关闭注水井,采用部分水平井井段注水、部分井段采油的同井注采方法,能够改变水驱方向,充分挖掘剩余油潜力;对于致密油藏,采用数值模拟方法研究了储层物性和压裂工艺对同井缝间异步注采的影响。研究表明,水平井同井注采技术能够显著提高水驱波及面积,实现均匀水驱,控制油井含水率,提高油井产量,同时减少注水井数,具有良好的应用前景。
In consideration of the existed problems in the process of horizontal well development in medium-high-permeability and tight oil reservoirs, such as undefined effects of the water-flooding and fracture water channeling etc., three kinds of down-hole injection-production controlling devices were designed for the horizontal well in the tight oil reservoir, three kinds of same/single-well injection-production technologies were innovated and put forward, and moreover the corresponding reservoir adaptability was analyzed. For the high-watercut horizontal wells in medium-high permeability reservoirs, the water injecting wells were closed, the partial well intervals were injected and produced for the same horizontal well, thus the direction of the water flooding was changed and the potential of the remained oil was fully tapped;for the tight oil reservoirs, with the help of the numerical simulation method, the influences of the reservoir physical properties and fracturing technology on the asynchronous injection and production among the fractures within the same well were studied. The study results show that the injection-production technique of the single horizontal well can significantly improve the swept area of the water flooding, achieve evenly water flooding, control the water cut of the oil well, increase the oil production, and meanwhile reduce the number of the water injecting well, so the better application prospects have been shown.
In consideration of the existed problems in the process of horizontal well development in medium-high-permeability and tight oil reservoirs, such as undefined effects of the water-flooding and fracture water channeling etc., three kinds of down-hole injection-production controlling devices were designed for the horizontal well in the tight oil reservoir, three kinds of same/single-well injection-production technologies were innovated and put forward, and moreover the corresponding reservoir adaptability was analyzed. For the high-watercut horizontal wells in medium-high permeability reservoirs, the water injecting wells were closed, the partial well intervals were injected and produced for the same horizontal well, thus the direction of the water flooding was changed and the potential of the remained oil was fully tapped;for the tight oil reservoirs, with the help of the numerical simulation method, the influences of the reservoir physical properties and fracturing technology on the asynchronous injection and production among the fractures within the same well were studied. The study results show that the injection-production technique of the single horizontal well can significantly improve the swept area of the water flooding, achieve evenly water flooding, control the water cut of the oil well, increase the oil production, and meanwhile reduce the number of the water injecting well, so the better application prospects have been shown.
引文
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[7]杨树人,谢威.同井注采油水分离器的优化设计[J].特种油气藏,2011,18(6):106-108.YANG Shuren,XIE Wei.Optimization design of oil-water separator for injection-production in the same well[J].Special Oil & Gas Reservoirs,2011,18(6):106-108.
[8]刘合,高扬,裴晓含,等.旋流式井下油水分离同井注采技术发展现状及展望[J].石油学报,2018,39(4):463-471.LIU He,GAO Yang,PEI Xiaohan,et al.Progress and prospect of downhole cyclone oil-water separation with single-well injection-production technology[J].Acta Petrolei sinica,2018,39(4):463-471.
[9]李忠兴,屈雪峰,刘万涛,等.鄂尔多斯盆地长7段致密油合理开发方式探讨[J].石油勘探与开发,2015,42(2):217-221.LI Zhongxing,QU Xuefeng,LIU Wantao,et al.Development modes of Triassic Yanchang Formation Chang 7 Member tight oil in Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(2):217-221.
[10]龚姚进,李清春.非均质多油层砂岩油藏异步注采的可行性[J].特种油气藏,2005,12(增刊2):63-65.GONG Yaojin,LI Qingchun.Feasibility of asynchronous injection alternating production for heterogeneous sandstone reservoirs[J].Special Oil & Gas Reservoirs,2005,12(S2):63-65.
[11]刘剑,刘月田,梁武全,等.碳酸盐岩潜山裂缝性油藏异步注采研究[J].科学技术与工程,2013,13(36):10811-10816.LIU Jian,LIU Yuetian,LIANG Wuquan,et al.Asynchronous injection-production research on carbonatite buried hill fractured reservoir[J].Science Technology and Engineering,2013,13(36):10811-10816.
[12]于海洋,杨中林,马恬,等.致密油藏多级压裂井异井异步注采可行性研究[J].石油科学通报,2018,3(1):32-44.YU Haiyang,YANG Zhonglin,MA Tian,et al.The feasibility of asynchronous injection alternating production for multistage fractured horizontal wells in a tight oil reservoir[J].Petroleum Science Bulletin,2018,3(1):32-44.
[13]程时清,汪洋,郎慧慧,等.致密油藏多级压裂水平井同井缝间注采可行性[J].石油学报,2017,38(12):1411-1419.CHENG Shiqing,WANG Yang,LANG Huihui,et al.Feasibility of inter-fracture injection and production for the same multistage fractured horizontal well in tight oil reservoir[J].Acta Petrolei sinica,2017,38(12):1411-1419.
[14]胡永乐,王燕灵,杨思玉,等.注水油田高含水后期开发技术方针的调整[J].石油学报,2004,25(5):65-69.HU Yongle,WANG Yanling,YANG Siyu,et al.Adjustment of technical policy for water-flooding oilfield with high water cut in the late stage of development[J].Acta Petrolei sinica,2004,25(5):65-69.
[15]代旭.大液量注水吞吐技术在致密油藏水平井中的应用[J].大庆石油地质与开发,2017,36(6):134-139.DAI Xu.Application of massive waterflooding huff-puff technique in the tight oil reservoir for horizontal wells[J].Petroleum Geology & Oilfield Development in Daqing,2017,36(6):134-139.
[16]吴忠宝,曾倩,李锦,等.体积改造油藏注水吞吐有效补充地层能量开发的新方式[J].油气地质与采收率,2017,24(5):78-83.WU Zhongbao,ZENG Qian,LI Jin,et al.New effective energy-supplement development method of waterflood huff and puff for the oil reservoir with stimulated reservoir volume fracturing[J].Petroleum Geology and Recovery Efficiency,2017,24(5):78-83.
[2]TABATABAEI M,MARK D J,DANIELS N R.Evaluating the performance of hydraulically fractured horizontal wells in the Bakken shale play[R].SPE 122570,2009.
[3]刘广为,周代余,姜汉桥,等.塔里木盆地海相砂岩油藏水平井水淹规律及其模式[J].石油勘探与开发,2018,45(1):128-135.LIU Guangwei,ZHOU Daiyu,JIANG Hanqiao,et al.Water-out performance and pattern of horizontal wells in Tarim Basin,NW China[J].Petroleum Exploration and Development,2018,45(1):128-135.
[4]伍友佳,李建,赵明,等.裂缝水窜形成的剩余油研究[J].西南石油大学学报,2007,29(3):36-38.WU Youjia,LI Jian,ZHAO Ming,et al.The remaining oil formed by water breakthrough in fractures[J].Journal of Southwest Petroleum University,2007,29(3):36-38.
[5]王铭显,范子菲,罗万静,等.特低渗透油藏多段压裂水平井注水可行性分析[J].现代地质,2016,30(6):1361-1369.WANG Mingxian,FAN Zifei,LUO Wanjing,et al.Feasibility analysis of water flooding with multi-fractured horizontal wells in ultra-low permeability reservoirs[J].Geoscience,2016,30(6):1361-1369.
[6]程心平,刘敏,罗昌华,等.海上油田同井注采技术开发与应用[J].石油矿场机械,2010,39(10):82-87.CHENG Xinping,LIU Min,LUO Changhua,et al.Development and application of single well integral injection/production technique[J].Oil Field Equipment,2010,39(10):82-87.
[7]杨树人,谢威.同井注采油水分离器的优化设计[J].特种油气藏,2011,18(6):106-108.YANG Shuren,XIE Wei.Optimization design of oil-water separator for injection-production in the same well[J].Special Oil & Gas Reservoirs,2011,18(6):106-108.
[8]刘合,高扬,裴晓含,等.旋流式井下油水分离同井注采技术发展现状及展望[J].石油学报,2018,39(4):463-471.LIU He,GAO Yang,PEI Xiaohan,et al.Progress and prospect of downhole cyclone oil-water separation with single-well injection-production technology[J].Acta Petrolei sinica,2018,39(4):463-471.
[9]李忠兴,屈雪峰,刘万涛,等.鄂尔多斯盆地长7段致密油合理开发方式探讨[J].石油勘探与开发,2015,42(2):217-221.LI Zhongxing,QU Xuefeng,LIU Wantao,et al.Development modes of Triassic Yanchang Formation Chang 7 Member tight oil in Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(2):217-221.
[10]龚姚进,李清春.非均质多油层砂岩油藏异步注采的可行性[J].特种油气藏,2005,12(增刊2):63-65.GONG Yaojin,LI Qingchun.Feasibility of asynchronous injection alternating production for heterogeneous sandstone reservoirs[J].Special Oil & Gas Reservoirs,2005,12(S2):63-65.
[11]刘剑,刘月田,梁武全,等.碳酸盐岩潜山裂缝性油藏异步注采研究[J].科学技术与工程,2013,13(36):10811-10816.LIU Jian,LIU Yuetian,LIANG Wuquan,et al.Asynchronous injection-production research on carbonatite buried hill fractured reservoir[J].Science Technology and Engineering,2013,13(36):10811-10816.
[12]于海洋,杨中林,马恬,等.致密油藏多级压裂井异井异步注采可行性研究[J].石油科学通报,2018,3(1):32-44.YU Haiyang,YANG Zhonglin,MA Tian,et al.The feasibility of asynchronous injection alternating production for multistage fractured horizontal wells in a tight oil reservoir[J].Petroleum Science Bulletin,2018,3(1):32-44.
[13]程时清,汪洋,郎慧慧,等.致密油藏多级压裂水平井同井缝间注采可行性[J].石油学报,2017,38(12):1411-1419.CHENG Shiqing,WANG Yang,LANG Huihui,et al.Feasibility of inter-fracture injection and production for the same multistage fractured horizontal well in tight oil reservoir[J].Acta Petrolei sinica,2017,38(12):1411-1419.
[14]胡永乐,王燕灵,杨思玉,等.注水油田高含水后期开发技术方针的调整[J].石油学报,2004,25(5):65-69.HU Yongle,WANG Yanling,YANG Siyu,et al.Adjustment of technical policy for water-flooding oilfield with high water cut in the late stage of development[J].Acta Petrolei sinica,2004,25(5):65-69.
[15]代旭.大液量注水吞吐技术在致密油藏水平井中的应用[J].大庆石油地质与开发,2017,36(6):134-139.DAI Xu.Application of massive waterflooding huff-puff technique in the tight oil reservoir for horizontal wells[J].Petroleum Geology & Oilfield Development in Daqing,2017,36(6):134-139.
[16]吴忠宝,曾倩,李锦,等.体积改造油藏注水吞吐有效补充地层能量开发的新方式[J].油气地质与采收率,2017,24(5):78-83.WU Zhongbao,ZENG Qian,LI Jin,et al.New effective energy-supplement development method of waterflood huff and puff for the oil reservoir with stimulated reservoir volume fracturing[J].Petroleum Geology and Recovery Efficiency,2017,24(5):78-83.
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