中低渗油藏水驱后储层变化及影响因素分析  

Changes in Reservoirs with Mid-low Permeability after Water Flooding and Analysis of Influencing Factors

作　　者：黄艳梅[1] 唐韵[1] 李莉[1] 徐莎[1] 王显[1] 罗钰涵[1] 丁华[2] 

机构地区：[1]中石化江苏油田分公司地质科学研究院,江苏扬州225009 [2]中石化江苏油田分公司科技处,江苏扬州225009

出　　处：《石油天然气学报》2013年第8期143-147,0-1+0,共5页Journal of Oil and Gas Technology

摘　　要：以高6断块为例,研究了水驱后储层的变化特征,并对储层变化的影响因素进行了研究。通过不同时期取心井的化验分析和动态生产相结合可见,在水驱后,中低渗油藏的高6断块孔隙度和渗透率未变差,反而呈变好的态势,但储层的非均质性更加复杂;敏感性与其他油田同样存在不同,由初期的强水敏变为弱水敏,而酸敏性增强;另外,长期的注水导致储层中水矿化度发生改变,使得调整井的测井响应发生改变,自然电位有偏移,强水淹电阻率升高。储层的这些变化受到储层本身特征、开发方式、注入水等的影响。正确评价储层特征的变化将有利于客观评价储层水淹状况,深化剩余油分布研究,优化射孔井段,调整注入水配伍方案等,更好地指导油田生产、提高油藏采收率。The reservoir characteristic variation of Block Gao 6 was studied after water flooding,and the influential factors were analyzed.Combined the chemical analysis of coring well with dynamic production in different periods,after water flooding the porosity and permeability had a change for the better trend,but the reservoir heterogeneity was more complex.The strong water sensitivity become weak,acid sensitivity was enhanced;On the other hand,long-term water-flooding resulted in reservoir water salinity changes,changes were induce in logging response to the adjustment wells and deviation was caused in natural potential,resistivity rise.These changes are affected by reservoir characteristics,development mode and injected water,etc.Proper evaluation of the changes of reservoir characteristics is beneficial for the objective evaluation of reservoir flooded conditions,deepening the research on residual oil distribution,optimizing the perforation interval,adjusting the scheme of compatibility of injected water,well guiding the oilfield production,improving reservoir recovery.

关 键 词：中低渗油藏 水驱 储层物性 敏感性 渗流特征 岩电特征 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]