渤海油田储层敏感性快速预测方法

Aquick prediction method for formation sensitivity in Bohai Oilfield

为了适应渤海油田优快钻井的需求,研究了一种快速评价储层敏感性的方法。通过收集和分析渤海油田储层特征、敏感性室内评价等资料,从影响敏感性的32个因素中评选出对水敏、速敏、酸敏、碱敏等各敏感性影响最大的因素,结合前人建立的储层敏感性预测方法,提出了适合渤海海域储层的敏感性快速预测方法,并开发出一套储层敏感性预测软件。利用该软件预测了渤海油田的73块岩心的敏感性,误差在10%以内,其中水敏、酸敏、碱敏等敏感性误差小于5%,能够满足渤海油田储层敏感性的分析评价。

In order to satisfy the demand of ＂drilling both quickly and well＂ in Bohai oilfield, a quick prediction method for formation sensitivity has been studied for Bohai oilfield. The number one factor of all 32 influencing sensitivity factors which affect the water, velocity, acid and alkali sensitivity were selected respectively by gathering and analyzing the data of reservoir characteristics and indoor sensitivity evaluation. A quick prediction method of formation sensitivity which suit for Bohai oilfield was proposed based on the methods built by previous experts, and then a set of software corresponding to prediction theory was developed. The sensitivity of 73 core blocks from Bohai oilfield were calculated and analyzed by this software and the errors were less than 10%. From the results we can know that the errors of water sensitivity and acid sensitivity were both under 5%, and the performance could meet the demand of formation sensitivity evaluation in Bohai oilfield.