葡西油田储层敏感性实验分析

针对葡西油田油层的地质特征 ,对葡西油田主要目的层葡萄花油层和黑帝庙油层进行了储层敏感性评价 ,其中包括速敏性评价、水敏性评价、盐敏性评价、酸敏性评价、碱敏性评价。评价结果表明 ,葡西油层存在一定的速敏性、水敏性和碱敏性。葡萄花油层的临界速度为 5 77m/d ,黑帝庙油层的临界速度为 1 4 8m/d ,水敏程度葡萄花油层和黑帝庙油层都表现为中等偏强 ,盐敏性为中等 ,临界盐度为 6 5 0 0× 10 - 6 。对于土酸、葡萄花油层和黑帝庙油层均表现为中弱酸敏。现场进行酸化时 ,应对目的层进行酸方筛选。对该油田的注水开采提出了合理建议

The Experimental Analysis of Reservoir Sensitivity in Puxi Oil Field

Based on the reservoir characteristics in Puxi Oil Field, the reservoir evaluations have been done to the main formations of interest-Putaohua oil layer and Heidimiao oil layer. There are a series of evaluations, such as velocity sensitivity evaluation, water sensitivity evaluation, salt sensitivity evaluation, alkali sensitivity evaluation and acid sensitivity evaluation. From the experimental results, Putaohua oil layer, in some way, belongs to velocity sensitive, water sensitive and alkali sensitive formation. Putaohua oil layer's critical velocity is 5 77 m/d, and Heidimiao's 1 48 m/d. Both Putaohua and Heidimiao oil layer shows medium to strong water sensitivity, and their salt sensitivity are medium with their critical salt concentration of 6 500 mg/L.. They also present medium to less acid sensitivity to mud acid. It is better to screen the acid fluid formula before acid treatment on site. So this paper puts out reasonable advice to the waterflood of Puxi Oil Field.