低渗透应力敏感性油藏产能及影响因素

新疆石油地质 ›› 2009, Vol. 30 ›› Issue (3): 351-354.

低渗透应力敏感性油藏产能及影响因素

文华

大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆 163318

收稿日期:2008-07-08 修回日期:2008-10-14 出版日期:2009-06-01 发布日期:2020-10-29
作者简介:文华(1980-),男,广西桂林人,硕士,油气田开发,(E-mail)wenhuazhg@126.com.
基金资助:
黑龙江省科技攻关项目,水平井产能设计及开发指标预测方法研究(GZ05A301)资助

Productivity and Influencing Factors of Oil Reservoir with Low Permeability and Pressure Sensitivity

WEN Hua

MOE Key Laboratory of EOR, Daqing Petroleum Institute, Daqing, Heilongjiang 163318, China

Received:2008-07-08 Revised:2008-10-14 Online:2009-06-01 Published:2020-10-29

摘要/Abstract

摘要： 基于低渗透非达西和变形介质拟稳态渗流理论及油相和水相相对流动能力方程,建立了低渗透应力敏感性油藏具有最大产量点的三相流流入动态曲线方程,据此可计算出油井或油藏的最低允许流动压力。在此基础上,结合大庆葡西油田生产数据,对影响油藏产能的油层启动压力梯度、变形系数、供给半径、平均地层压力和含水率进行了研究,结果表明,启动压力梯度、变形系数等因素对低渗透油藏产能和最低允许流压均有较显著的影响。该方法能有效评价和预测低渗透应力敏感性油藏的产能变化,也为油井合理工作制度的确定,充分发挥油井产能提供了依据。

关键词: 低渗透油气藏, 启动压力, 应力, 产能, 影响

Abstract: Low permeability reservoir is not only of existence of threshold pressure gradient, but also could be deformed when the reservoir permeability exponentially decreases with formation pressure decline. This phenomenon most occurred in reservoirs with abnormal pressure and low or super-low permeability. Based on the pseudosteady state theory of non-Darcy flow and deformed media percolation and relative flow behavior equation of oil and liquid phases, the three-phase flow IPR curves with maximum flow rate point in low permeability and pressure sensitivity oil reservoir are derived, by which the allowable minimum flowing pressure in oil well o reservoir can. be calculated. Also, combining with the production data from Puxi oil field in Daqing, the threshold pressure gradient, deformation cofficient, drainage radius, average formation pressure and water cut that affect the reservoir productivity are studied. The results show that the threshold pressure gradient, deformation coefficient have remarkably influences on the reservoir productivity and the allowable minimum flowing pressure. This method can be used to effectively evaluate and forecast the variation of productivity in oil reservoir with low permeability and pressure sensitivity, meanwhile, provide bases for determination of reasonable flow pressure and routine of work as well as sufficiently displaying well flow capacity.

Key words: low permeability reservoir, threshold pressure, starting pressure, stress, productivity, influence, effect

中图分类号:

TE348.

文华. 低渗透应力敏感性油藏产能及影响因素[J]. 新疆石油地质, 2009, 30(3): 351-354.

WEN Hua. Productivity and Influencing Factors of Oil Reservoir with Low Permeability and Pressure Sensitivity[J]. Xinjiang Petroleum Geology, 2009, 30(3): 351-354.

参考文献

[1] 戈尔布偌夫AT.异常油田开发[M].北京:石油工业出版社, 1987.
[2] Farquhar R A, Smar B G D. Stress sensitivity of low peimea-bilitysandstones from the rotliegendes Sandstone [A]. SPE 26501, 1995.
[3] 代平,孙良田,李闽.低渗透砂岩储层孔隙度滲透率与有效应力关系研究[J].天然气工业, 2006, 26(5):93-95.
[4] 郑祥克,陶永建,门承全,等.低速非达西渗流产能方程的建立[J].新疆石油地质,2003 ,24(2): 158-160.
[5] 胥元刚,刘顺.低渗透油藏油井流人动态研究[J].石油学报,2005 ,26(4):77-80.
[6] 戴江,将凯军,张雁.低速非达西渗流储层产能评价[J].燕山大学学报2005 ,29(1):22-26.
[7] 李晓良,王厉强,李彦,等.启动压力梯度动态变化对IPR方程影响分析[J].石油钻探技术,2007 ,35(2):70-72.
[8] 王厉强,李彦,杜洪荣,等.启动压力梯度变化下低渗透油藏IPR影响因素的探讨[J].油气地质与采收率, 2007,14(2):78-80.
[9] Pedrosa O A Jr. Pressure transient response in stress -sensitive formation[A]. SPE 15115, 1986.
[10] 张建国,雷光伦, 张艳玉.油气层渗流力学[M].山东东营:石油大学出版社, 1998:201-204.
[11] 宋付权. 变形介质低渗透油藏的产能分析[J].特种油气藏,2002,9(4):33-35.
[12] 邱蜀峰,郭建春,赵金洲,等.考虑脱气的异常高压油藏产能模型研究[J].河南石油,2005, 19(3):35-37.
[13] 罗大雨,曹文江,曾平.脱气变形介质油藏产能模型研究[J].特种油气藏, 2004,11(6):54-55.
[14] 寇根,王厉强,李彦,等.储层应力敏感性动态变化对低渗透油藏产能的影响[J].油气地质与采收率,2007, 14(3): 101-104.
[15] 林玉秋,王树华.采油井合理流动压力的界限[J].石油勘探与开发, 1995 ,22(6):51-53.
[16] 谢兴礼,朱玉新,夏静,等. 具有最大产量点的新型流人动态方程及其应用[J].石油勘探与开发,2005,32(3):113-116.