精细储层描述在荆丘油田调整挖潜中的初步实践

PRELIMINARY APPLICATION OF FINE RESERVOIR DESCRIPTION TO DEVELOPMENT OF JINGQIU OILFIELD

荆丘油田是一个构造相对简单、油层多而厚度大的未饱和层状油藏 ,经过 10多年的开发而处于高含水开发阶段。为了挖掘开发中后期的潜力开展了精细油藏描述。根据荆丘油田的实际特点 ,描述工作以储层为主 ,进行了纵向沉积单元细分、沉积 岩石微相、厚油层层内非均质特征、岩石物理相和剩余油分布等研究。工作中 ,首次利用神经网络模拟预测储层的物性、沉积、成岩参数 ,分析并定量表征了沉积 岩石微相 ,进一步对岩石物理相及剩余油分布等展开深入研究 ,为改善油藏开发效果提供了可靠的地质基础 ,并通过实施取得了良好效果。

The Jingqiu oilfield is coomprised of an u nsaturated layer-shaped oil reservoir with simple structure, multi-oil-bearin g formation and big thickness.It has been in high water cut stage as it has been developed for more than ten years.The fine oil-reservoir descripton has been a pplied in order to evaluate its potentials in the middle and late period of deve lopment. In according with its own feature, the description was mainly focused o n the reservoir itself including fractionizing sedimentation cell, sedimentary a nd petrographic microfacies, features of heterogeneity of thick oil layers, petr ophysical facies, and distribution of remaining oil, etc. The nerve-network met hod was used for the first time to simulate and to predict the parameter of phys ical property, sedimentation and diagenic metamophism, and quantitatively pointe d out sedimentary-petrography microfacies. The study of petrophysical facies an d the distribution of the remaining oil provided geological foundation for impro - ving its development, and gained good result in the developing implementat ion