冷41块水侵规律及综合治理工艺研究与应用
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摘要
辽河油田冷41块为边底水活跃的超稠油油藏,目前采取蒸汽吞吐方式开采。边底水的侵入始终伴随着油藏开发的全过程,随着蒸汽吞吐轮次的增加,油井水淹现象进一步加剧,区块产量受到很大的影响,边底水侵入成为影响区块开发效果的主要因素。通过对油藏边底水的静态认识,通过动态分析在开发的各个阶段的水侵方式、水侵速度等规律及其对蒸汽吞吐效果影响的基础上,提出相应有效的防水、治水等措施以延长吞吐有效期、提高吞吐效果的技术对策,以利于冷41块更加合理高效的开发;并针对冷41块油藏地质特点,研制出一种高温调剖剂/水玻璃粘土胶/树脂粉煤灰高强度复合堵剂。该复合堵剂形成封堵强度低、中、高阶梯式三段塞堵水屏障,封堵强度高,耐温性好,有效地控制了边底水锥进。在现场实施过程中取得了明显增油降水效果,解决了边底水对该区块的危害问题,达到稳油控水的目的。
Block Leng41 in Liaohe Oilfield is a super heavy oil reservoir with active edge water and bottom water, and it is produced with steam stimulation at present. The edge water and bottom water invasion in oil wells has always been companied by the whole process of reservoir development. With steam injection cycles increase, the problem of water invasion in the well becomes more and more severe, which significantly affects the oil production of the Block. The edge water-out and bottom water-out is the key factor affecting oil production in the block. This paper gives the research of static knowledge of edge water and bottom water. On the basis of static analysis of water-out regular pattern and water-out rate during each phase of reservoir development as well as the edge water-out and bottom water-out effects on steam huff & puff, the effective water control and water management methods have been proposed for extending effective period of huff and puff and improving steam stimulation results to get reasonable and efficient development of Block Leng41. In terms of geologic features of Block Leng41, a high temperature profile control agent silicate clay gel/resin fly ash complex water plugging agent with high strength has been developed. With this kind of complex plugging agent, three staged water plugging barriers with low, medium and high strength are formed, having good temperature resistance and high plugging strength to control edge water and bottom water coning. In field application, the incremental oil and the water reduction have been obtained and the damage due to edge water-out and bottom water-out has been resolved. The purposes of keeping oil production stable and water control have been achieved.
Block Leng41 in Liaohe Oilfield is a super heavy oil reservoir with active edge water and bottom water, and it is produced with steam stimulation at present. The edge water and bottom water invasion in oil wells has always been companied by the whole process of reservoir development. With steam injection cycles increase, the problem of water invasion in the well becomes more and more severe, which significantly affects the oil production of the Block. The edge water-out and bottom water-out is the key factor affecting oil production in the block. This paper gives the research of static knowledge of edge water and bottom water. On the basis of static analysis of water-out regular pattern and water-out rate during each phase of reservoir development as well as the edge water-out and bottom water-out effects on steam huff & puff, the effective water control and water management methods have been proposed for extending effective period of huff and puff and improving steam stimulation results to get reasonable and efficient development of Block Leng41. In terms of geologic features of Block Leng41, a high temperature profile control agent silicate clay gel/resin fly ash complex water plugging agent with high strength has been developed. With this kind of complex plugging agent, three staged water plugging barriers with low, medium and high strength are formed, having good temperature resistance and high plugging strength to control edge water and bottom water coning. In field application, the incremental oil and the water reduction have been obtained and the damage due to edge water-out and bottom water-out has been resolved. The purposes of keeping oil production stable and water control have been achieved.
引文
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[16]白宝君,唐孝芬,李宇乡.区块整体调剖优化设计技术研究[J].石油勘探与开发,2000,27(3):60-63
[17]袁谋,尹文军.大面积堵水调剖技术工业化研究[J].石油勘探与开发,2003,30(2):88-90
[18]潭璋,孔凡群,梁开芳.化学堵水调剖工艺[M].北京:石油工业出版社,1997:20-27
[19]Zaitoun A, Koller N and Anderson W. Treatment helps to decrease water. SPE 18085
[20]赵长喜,等.稠油油藏边水封堵技术的研究与应用[J].钻采工艺,2003,26(2):18-20
[21]史凤琴.国内外油田化学堵水剂.石油钻采工艺,1992,(5):77-84
[22]李宇乡,刘双成.我国油田化学堵水调剖剂开发和应用现状[J].油田化学,1995,12(1):88-94
[23]张绍东.热采堵水调剖剂研究及应用[J].特种油气藏,2001,8(3):15-18
[24]黎钢.水溶性酚醛树脂作为水基聚合物凝胶交联剂的研究[J].油田化学,2000,17(4):310-313
[25]王桂勋.高强度选择性堵剂研究与应用[J].精细石油化工进展,2003,4(12):7-9
[26]李克华.钙土堵剂的二次利用及其应用[J].石油勘探与开发,1999,26(6):78-80
[27]朱晓荣.保护高含水油井剩余油富集层段的多种堵剂组合堵水技术[J].油田化学,2004,21(2):131-134
[2]Burkhoder L A. Oil Gas J, 1987,85(38):93-98
[3]王世艳,邓玉珍,张海娜.陆相储集层微型构造研究[J].石油勘探与开发,2000,27(6):79-80
[4]Phelps Craig H, Strom E Tomas. Method for Inparting Selectivity to Otherwise Nonselective Polymer Profile Control Gels. US 4856586. 1989
[5]Bayoumi N,El-Emam,kamal O et an.The effect of polymers on the displacement of Nubia crude oil (October field)
[6]WANG DA MIN, LIU HENG, NIU JIN GENG, et al.Application Results and Understanding of Several Problems of Industrail Seale Polymer Flooding in Daqing Oil Field [c] SPE 50928,1998
[7]刘翔鹗.油田区块整体调剖、堵水技术论文集[M].北京:石油工业出版社,1994:63-65
[8]万仁溥,罗英俊.采油技术手册——堵水技术(第十分册)[M].北京:石油工业出版社,1991:5
[9]刘翔鹗.1997油田堵水技术论文集[M].北京:石油工业出版社,1998:127-132
[10]Liang J, Sun H and Seright R s .Reduction of oil and water permeabilities using gels SPE 24195, 1992
[11]Liang J, Sun H and Seright R s .Why do gels reduce water permeability more than oil permeability.SPERE, Nov.1995, 282-286
[12]刘一江,王香增.化学堵水调剖技术[M].北京:石油工业出版社,1999:37-41
[13]陈铁龙,蒲万芬.油田稳有控水技术论文集[M].北京:石油工业出版社,2000:82-87
[14]白宝君,李宇乡.国内外化学堵水调剖技术综述[J].断块油气田,1998,5(1):1-4
[15]王成杰.国内堵水调剖技术发展和应用[J].吉林石油科技,1994,(4):25-35
[16]白宝君,唐孝芬,李宇乡.区块整体调剖优化设计技术研究[J].石油勘探与开发,2000,27(3):60-63
[17]袁谋,尹文军.大面积堵水调剖技术工业化研究[J].石油勘探与开发,2003,30(2):88-90
[18]潭璋,孔凡群,梁开芳.化学堵水调剖工艺[M].北京:石油工业出版社,1997:20-27
[19]Zaitoun A, Koller N and Anderson W. Treatment helps to decrease water. SPE 18085
[20]赵长喜,等.稠油油藏边水封堵技术的研究与应用[J].钻采工艺,2003,26(2):18-20
[21]史凤琴.国内外油田化学堵水剂.石油钻采工艺,1992,(5):77-84
[22]李宇乡,刘双成.我国油田化学堵水调剖剂开发和应用现状[J].油田化学,1995,12(1):88-94
[23]张绍东.热采堵水调剖剂研究及应用[J].特种油气藏,2001,8(3):15-18
[24]黎钢.水溶性酚醛树脂作为水基聚合物凝胶交联剂的研究[J].油田化学,2000,17(4):310-313
[25]王桂勋.高强度选择性堵剂研究与应用[J].精细石油化工进展,2003,4(12):7-9
[26]李克华.钙土堵剂的二次利用及其应用[J].石油勘探与开发,1999,26(6):78-80
[27]朱晓荣.保护高含水油井剩余油富集层段的多种堵剂组合堵水技术[J].油田化学,2004,21(2):131-134