浅层超稠油油藏FAST-SAGD提高采收率技术研究
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摘要
新疆油田浅层超稠油油藏部分SAGD部署区储层物性差,非均质性强,为了增加蒸汽热利用率,提高SAGD开发效果,运用数值模拟技术,以风城油田重18井区为例,开展SAGD与水平井组合的FAST-SAGD技术研究,优化了FAST-SAGD井网部署方式、操作方法及关键参数。结果表明:加密水平井部署在距油层底部2 m,前期进行溶剂浸泡及微压裂处理,在SAGD井组生产2 a后加密水平井以吞吐的方式启动效果最佳;与常规SAGD相比,FAST-SAGD开采周期缩短3 a,最终采收率提高9.3%,油汽比提高0.02。研究结果对浅层超稠油油藏SAGD高效开发有一定指导意义。
In Xinjiang Oilfield,the shallow-seated super heavy oil reservoirs with SAGD are partially characterized by poor reservoir physical properties and strong heterogeneity. To increase the steam utilization ratio and improve SAGD development effects,Zhong 18 well block of Fengcheng Oilfield was taken as the example for study. The FAST-SAGD technology combining SAGD with horizontal well was investigated by means of numerical simulation,and its well pattern arrangement modes,operation methods and key parameters were optimized. To realize the optimal stimulation effects,it is necessary to locate the infill horizontal wells at 2 m from the bottom of oil layers,carry out solvent soaking and micro fracturing in the early stage,and start up the infill horizontal wells in the mode of huff and puff after SAGD well groups are produced for 2 a. FAST-SAGD is better than conventional SAGD. Its production period shortens by 3 a,ultimate recovery factor increases by 9. 3% and oil-steam ratio increases by 0. 02. The research results can be used as the reference for the efficient SAGD development of super heavy oil reservoirs in shallow layers.
In Xinjiang Oilfield,the shallow-seated super heavy oil reservoirs with SAGD are partially characterized by poor reservoir physical properties and strong heterogeneity. To increase the steam utilization ratio and improve SAGD development effects,Zhong 18 well block of Fengcheng Oilfield was taken as the example for study. The FAST-SAGD technology combining SAGD with horizontal well was investigated by means of numerical simulation,and its well pattern arrangement modes,operation methods and key parameters were optimized. To realize the optimal stimulation effects,it is necessary to locate the infill horizontal wells at 2 m from the bottom of oil layers,carry out solvent soaking and micro fracturing in the early stage,and start up the infill horizontal wells in the mode of huff and puff after SAGD well groups are produced for 2 a. FAST-SAGD is better than conventional SAGD. Its production period shortens by 3 a,ultimate recovery factor increases by 9. 3% and oil-steam ratio increases by 0. 02. The research results can be used as the reference for the efficient SAGD development of super heavy oil reservoirs in shallow layers.
引文
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[2]POLIKAR M,CYR T J,COATS R M.Fast-SAGD:halfthe wells and 30%less steam[C].SPE65509,2000:1-6.
[3]SHIN H,POLIKAR M.Fast-SAGD application in the Alberta Oil Sands Areas[J].Journal of Canadian Petroleum Technology,2006,45(9):46-53.
[4]HUY X Nguyen,WISUP Bae,XUAN V Tran,et al.Experimental design to optimize operating Conditions for SAGD Process,Peace River Oil Sands,Alberta[C].SPE145917,2011:1-10.
[5]DANG Cuong T Q,CHEN Zhangxin(John),NGUYEN Ngoc T B,et al.Fast-SAGD vs SAGD:a comparative numerical simulation in three major formation of Albert’s Oil Sands[C].SPE144149,2012:1-17.
[6]SHIN H,POLIKAR M.Experimental investigation of the Fast-SAGD Process[C].CIPC2006-097,2006:1-11.
[7]裴艳丽,姜汉桥,周赫,等.稠油油藏FAST-SAGD技术储层筛选标准[J].特种油气藏,2016,23(2):115-119.
[8]王建俊,鞠斌山,陈常红,等.超稠油FAST-SAGD技术影响因素分析[J].特种油气藏,2016,23(2):89-92.
[9]赵睿,杨智,吴永彬,等.SAGD循环预热阶段加速连通方法的研究及应用[J].石油钻采工艺,2015,37(2):67-69.
[10]席长丰,马德胜,李秀峦,等.双水平井超稠油SAGD循环预热启动优化研究[J].特种油气藏,2007,14(6):40-43.
[11]孙新革,何万军,胡筱波,等.超稠油双水平井蒸汽辅助重力泄油不同开采阶段参数优化[J].新疆石油地质,2012,33(6):697-699.
[12]霍进,桑林翔,杨果.双水平井蒸汽辅助重力泄油汽腔上升阶段的注采调控[J].新疆石油地质,2012,33(6):694-696.
[13]ANDERSON M T,KENNEDY D B.SAGD startup:leaving the heat in the reservoir[C].SPE157918,2012:1-9.
[14]LEONTARITIS K J,AMAEFULE J O,CHARLES R E.Core laboratories.asystematic approach for the prevention and treatment of formation damage caused by asphaltene deposition[C].SPE23810,1992:383-387.
[15]TRBOVICH M G,KING G E.Asphaltene deposit removal long-lasting treatment with a co-solvent[C].SPE21038,1991:393-400.
[16]YUAN Yanguang,XU Bin,YANG Baohong.Geomechanics for the Thermal Stimulation of Heavy Oil Reservoirs–Canadian Experience[C].SPE150293,2011:12-14.
[17]YUAN J,MCFARLANE R.Evaluation of steam circulation strategies for SAGD startup[J].Journal of Canadian Petroleum Technology,2011,50(1):20-32.
[18]程紫燕,周勇.水平井蒸汽驱技术政策界限优化研究[J].石油天然气学报,2013,35(8):139-142.
[19]刘春泽,任香,李秀峦,等.浅薄层超稠油水平井蒸汽吞吐后转换开发方式研究[J].特种油气藏,2010,17(4):66-68.
[20]孙新革,马鸿,赵长虹,等.风城超稠油蒸汽吞吐后期转蒸汽驱开发方式研究[J].新疆石油地质,2015,36(1):61-64.
[21]肖娟.超稠油油藏双水平井SAGD循环预热优化设计研究[J].特种油气藏,2010,17(增刊):119-121.
[22]吴永彬,李秀峦,孙新革,等.双水平井蒸汽辅助重力泄油注汽井筒关键参数预热模型[J].石油勘探与开发,2012,39(4):481-487.
[23]周体尧,程林松,何春百,等.注过热蒸汽井筒沿程参数及加热半径计算模型[J].石油勘探与开发,2010,37(1):83-88.
[24]王弥康.注蒸汽井井筒热传递的定量计算[J].石油大学学报(自然科学版),1994,18(4):77-82.
[25]王利群,周惠忠.水平井沿井管射孔蒸汽出流分布的计算模型[J].清华大学学报(自然科学版),1996,36(4):76-81.
[26]刘尚奇.水平井热采油藏数值模型[J].石油学报,1995,16(2):63-70.
[27]Duong Anh N.Thermal transient analysis applied to horizontal wells[C].SPE117435,2008:1-5.
[28]Duong Anh N,Tomberlin Timothy A.A new analytical model for conduction heating during the SAGD circulation phase[C].SPE117434,2008:1-3.