安塞特低渗透油田井间电位剩余油监测适应性评价  

Evaluation of cross-well potential residual oil in Ansai ultra low permeability oilfield

作　　者：李新春[1] 王小军[1] 刘渊[1] 周文军[2,3] 王浪波[1] 冯春艳[4] 

机构地区：[1]中国石油长庆油田分公司第一采油厂,陕西延安716000 [2]低渗透油气田勘探开发国家工程实验室 [3]中国石油长庆油田分公司油气工艺研究院 [4]中国石油长庆油田分公司第二采油厂

出　　处：《石油地质与工程》2012年第4期127-129,10,共3页Petroleum Geology and Engineering

摘　　要：安塞油田王窑区目前已进入开发中后期,地层非均质性强、水驱不均等造成平面及剖面上剩余油动用难度大,单靠动态分析法难以准确判断剩余油分布规律,需要结合动态监测技术进一步分析判断。利用井间电位法测试技术监测目的层电阻率,依据电阻率分布及变化评价平面剩余油富集区。监测结果显示,王窑老区淡水驱开发油藏地层电阻率遵循理论上"U"型变化规律,即随着水淹程度的提高地层电阻率先下降,而后又升高。高产水率地层电阻率整体呈上升趋势,也有部分降低,其变化与产出水矿化度有关,遵循高矿化度低电阻、低矿化度高电阻的规律。Ansai oilfield Wangyao area has entered the middle and late stage of development, the formation heterogeneity is strong, water flooding is not equal, which caused difficulty of residual oil production degree in the plane and the profile. Dynamic analysis method is difficult to accurately determine the residual oil distribution law. A combination of dynamic monitoring technique is required for further analysis. Using cross-well potential to test target layer resistivity, and using resistivity distribution and change to evaluate residual oil enrichment zone. Monitoring results show that Wangyao area fresh water flooding reservoir formation resistivity followed the theory of 'U' type change, that is the formation resistivity decrease firstly, then increase with the increasing of water flooding degree. High water flooding strata resistivity show rising trend, with which small parts reduce. The change is related with output water salinity, which followed the law of high salinity with low resistance and low salinity with high resistance.

关 键 词：安塞油田 特低渗透油田 地层电阻率分布 剩余油 适应性评价 

分 类 号：TE33[石油与天然气工程—油气田开发工程]