乐安油田草104块储层敏感性评价

乐安油田草104块储集层中存在伊/蒙混层、高岭石、伊利石等黏土矿物以及方解石等碳酸盐矿物。这些矿物都有不同程度的敏感性,在油田勘探开发的不同阶段,会对储集层造成不同的伤害。试验研究表明,草104块储集层具有强水敏性和中等盐敏性,注水开发时应该注重注入水与地层的配伍性。此外,该储集层具有弱碱敏性,并对土酸不具有敏感性,因此可用土酸进行酸化处理。

Reservoir Sensitivity Evaluation of Block Cao104 in Le'an Oilfield

Clay minerals of ittite/mont morillonite mixing layer, kaolinite, illite etc. and carbonate mineral of calcite etc. exist in Cao 104 reservoir in Le'an oilfield. Various sensitivity in these minerals may damage the reservoir in the different stages of oilfield exploration and development. The experiment study indicates that strong water sensitivity and moderate salt sensitivity exist in the reservoir. So attention should be paid to the compatibility between injected water and the formations in the period of water injection development. In addition, the reservoir has weak alkali sensitivity and no earth acid sensitivity, so earth acid can be used for acidizing stimulation.