张兴焰,闫志军,李淑梅,张英华,李继强
ZHANG Xing-yan~1; YAN Zhi-un~2; LI Shu-mei~1; ZHANG Ying-hua~1;LI Ji-qiang~1 (1.Research Institute of Exploration and Development;

• 1:中原油田分公司勘探开发科学研究院
• 2:中原油田分公司采油四厂
• 3:中原油田分公司勘探开发科学研究院
• 4:中原油田分公司勘探开发科学研究院

摘要(Abstract)：

文东油田原始地层压力系数1 71~1 88, 储层处于欠压实状态。投入开发后, 地层压力下降,储层在有效围压的作用下, 孔喉变小, 部分孔隙变成无效孔隙, 渗透率不断降低; 有效围压的作用越强, 渗透率降低幅度越大; 渗透率越低, 这种关系越明显, 并且这种过程是不可逆的。渗透率的下降导致注水压力升高, 采油指数大幅下降。因此开发此类油藏, 必须注意注水时机及地层压力界限的保持, 并根据地层压力的下降状况采取相应的开发对策。
The original formation pressure coefficient of Wendong oilfield is between 1.71 and 1.88 and the reservoirs keep in under-compaction condition. Formation pressure drops after being put into production.Under the action of effective peripheral pressure,the pore and throat become smaller,and furthermore partial pores turn inefficient,so the permeability reduces a great deal;the more serious effective peripheral pressure is,the bigger permeability reduces;when the less permeability is, the more obvious the above relation,and this process is irreversible. Permeability reduction results in higher water injection pressure and a larger decline degree of oil production index. Therefore when this kind of oil reservoirs being bring into development,water injection time and maintenance of formation pressure limit must be considered seriously. In addition,corresponding development measurement must be adapted according to pressure decline situation.

关键词(KeyWords)： 压敏效应;异常高压;渗透率;采油指数;文东油田
pressure-sensitive effects;abnormal high pressure;permeability;oil production index;Wendong oilfield

Abstract:

Keywords:

基金项目(Foundation): 中国石化股份有限公司“十五”科技攻关项目 (编号为: P01034)。

作者(Authors): 张兴焰,闫志军,李淑梅,张英华,李继强
ZHANG Xing-yan~1; YAN Zhi-un~2; LI Shu-mei~1; ZHANG Ying-hua~1;LI Ji-qiang~1 (1.Research Institute of Exploration and Development;

参考文献(References)：

• [1]许化政文留盐背斜形成与油气富集[J]石油与天然气地质,1998,9(3):288296
• [2]闫东育,张同兴,黄国平,等东濮凹陷盐丘浅析[J]石油勘探与开发,2001,28(6):99100
• [3]黄新文,张兴焰文东深层低渗透多油层砂岩油田细分层系开发[J]石油勘探与开发,2003,30(2):8486
• [4]秦积舜变围压条件下低渗砂岩储层渗透率变化规律研究[J]西安石油学院学报,2002,17(4):2831
• [5]何秋轩,阮　敏,王志伟低渗透油藏注水开发的生产特征及影响因素[J]油气地质与采收率,2002,9(2):69
• [6]刘先贵,刘建军降压开采对低渗储层渗透性的影响[J]重庆大学学报,2000,23(增刊):9395
• [7]吴应川,黄新文非均质多油层油田逐层段上返注水开发[J]石油学报,1997,18(4):61