异常高压低渗透砂岩储层应力敏感性定量模型——以东濮凹陷文13东沙三中油藏为例  

Quantitative model on stress sensitivity of sandstone reservoirs with abnormal high pressure and low permeability:Taking the middle section of the third member of Shahejie formation in the Wen 13 Dong oil field,Dongpu sag as a case in point

作　　者：王瑞飞[1] 吕新华[2] 国殿斌[2] 黄新文[2] 

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]中石化中原油田分公司,河南濮阳457001

出　　处：《中国矿业大学学报》2013年第2期243-250,共8页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51104119);陕西省自然科学基金项目(2010JQ5002);陕西省教育厅自然科学专项(11JK0741)

摘　　要：为建立异常高压低渗透砂岩油藏储层应力敏感性定量模型,进行了模拟油藏条件的应力敏感性实验.实验采取改变围压(恒定孔隙流体压力)和改变孔隙流体压力(恒定围压)两种方式进行.研究结果表明:应力敏感性实验中改变围压与改变孔隙流体压力对有效应力的影响差异较大.改变围压比改变孔隙流体压力有效应力增加明显得多,改变围压的常规应力敏感性实验夸大了储层应力敏感性伤害程度.基于变孔隙流体压力应力敏感性实验,回归出各类储层的应力敏感性定量模型.其中,变孔隙压力液体应力敏感性模型与实际油田开发较为接近.异常高压低渗透砂岩油藏开发,油井见水后,采液指数、采油指数急剧下降;进入高含水开发阶段,采液指数回升,采油指数仍下降,此类油藏不适合采取提液手段稳定产量.In order to establish the quantitative model on stress sensitivity of sandstone reservoirs with abnormal high pressure and low permeability, this study was carried out the stress sensitivity experiment with condition of simulated oil reservoir. The experiment was used to study the stress sensitivity by changing the confining pressure （constant pore fluid pressure） and the pore fluid pressure （constant confining pressure）. The research results show that. changing the confining pressure has a greater influence on the effective stress compared with that changing the pore fluid pressure; the effective stress for changing the confining pressure obviously increases in contrast with that for changing pore fluid pressure; the stress sensitivity damage is exaggerated in changing confining pressure experiment on stress sensitivity. Based on the stress sensitivity experiment of changing pore fluid pressure, the quantitative models on stress sensitivity were obtained. The model, which is derived from liquid stress sensitivity experiment of changing pore fluid pressure, is closer to the actual oilfield development. In the develooment of sandstone reservoir with abnormal hieh pressure and low Dermeabilitv, the indexes of liquid and oil production decrease rapidly after water appears. In the high water cut stage, the index of liquid production goes up, while the index of oil production still goes down. This kind of reservoir is unfit for stabilizing the production by improving the liquid production.

关 键 词：异常高压 低渗砂岩储层 应力敏感 定量模型 东濮凹陷 

分 类 号：TE311[石油与天然气工程—油气田开发工程]