低渗透变形介质渗透率时变效应规律及对油田开发的影响Rule of Permeability Trend Change of the Times and Its Influence on Development in Low Permeability Deformation Medium Reservoir
高永利;张志国;
摘要(Abstract):
针对低渗透油田开发过程中存在的时变效应,以室内实验为基础,结合数值模拟方法研究了低渗透油藏渗透率时变效应规律及其对油田开发效果的影响。结果表明,上覆压力越大,渗透率时变伤害率越大,上覆压力增大至一定值之后,上覆压力的变化对渗透率伤害率的影响不大。渗透率越小,渗透率时变伤害率越大。当渗透率小于0.1×10-3μm2时,渗透率时变伤害明显增大,同时难以恢复到原渗透率条件,裂缝性岩心时变伤害大且伤害后恢复更加困难。时变效应对渗透率的伤害主要集中在井筒附近,无因次半径越小,渗透率伤害越大;在相同的生产压差下,时变效应系数越大,油井产量越低。
关键词(KeyWords): 变形介质;渗透率;时变效应;低渗透油田;开发
基金项目(Foundation): 国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(2011ZX05044)
作者(Author): 高永利;张志国;
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DOI:
参考文献(References):
- [1]Fatt I,Davis D H.Reduction in permeability with overburdenpressure[J].Petroleum Transactions,1952,4(12):34-41.
- [2]Mckee C R,Bumb A C,Koenig R A.Stress dependent permea-bility and porosity of coal and other geologic formations[J].SPE Formation Evaluation,1988,3(1):81-91.
- [3]Davies J P,Davies D K,David K.Stress dependent permeabili-ty:Characterization and modeling[C]∥Anon.Proceedings ofSPE Annual Technical Conference and Exhibition.Houston:[s.n.],1999:224-235.
- [4]杨锐华.压力对低渗透岩芯渗透率测试的影响[J].钻采工艺2003,26(4):77-79.
- [5]陈召佑,李丽君,李闽,等.镇泾油田低渗透油藏岩石渗透率应力敏感性研究[J].地质科技情报,2010,29(2):1-4.
- [6]Min K,Rutqvist J,Tsang C.Stress dependent permeability offractured rock masses:A numerical study[J].InternationalJournal of Rock Mechanics and Mining Sciences,2004,41(7):1191-1210.
- [7]Iscan A G,Kok M V,Bagc A S.Estimation of permeabilityand rock mechanical properties of limestone reservoir rocks un-der stress conditions by strain gauge[J].Journal of PetroleumScience and Engineering,2006,53(1):13-24.
- [8]周锋德,姚光庆,王国昌,等.Elman神经网络在低渗储层敏感性预测中的应用[J].地质科技情报,2007,26(6):91-94.
- [9]刘建军,刘先贵.有效压力对低渗透多孔介质孔隙度、渗透率的影响[J].地质力学学报,2001,7(1):41-44.
- [10]高辉,孙卫宋,广寿.鄂尔多斯盆地合水地区长8储层特低渗透成因分析与评价[J].地质科技情报,2008,27(5):71-76.
- [11]石玉江,孙小平.长庆致密碎屑岩储集层应力敏感分析[J].石油勘探与开发,2001,28(5):85-87
- [12]孙广忠.岩体结构力学[M].北京:科学出版社,1994:109-182.
- [13]Pedrosa J.Pressure transient response in stress stensitive for-mation[C].SPE,1986,15115:203-210.
- [14]Soedder D J.Porosity,permeability and pore pressure of thetight mesaverde sandstone,Piceance basin,Colorado[C].SPE,1987,13134:129-137.
- [15]蒋海军,鄢捷年,李荣.裂缝性储层应力敏感性实验研究[J].石油钻探技术,2000,28(6):32-33.
- [16]于忠良,熊伟,高树生,等.致密储层应力敏感性及其对油田开发的影响[J].石油学报,2007,28(4):96-98.
- [17]刘仁静,刘慧卿,张红玲,等.低渗透储层应力敏感性及其对石油开发的影响[J].岩石力学与工程学报,2011,30(1):2697-2702.
- [18]阮敏,王连刚.低渗透油田开发与压敏效应[J].石油学报,2002,3(3):73-76.