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水平井开采技术是近年来广泛用于页岩薄层、低渗透等复杂油藏开采的一种主要方法.然而,如何全面考察来自油藏、酸液及酸化过程中的一些主要因素特别是难于用一般方法描述的酸蚀孔洞形成和生长的随机因素对酸化处理效果的影响,则是碳酸盐岩油藏水平井基质酸化技术设计和效果评价时所遇到的难题之一.通过首次综合考虑当代分形理论研究的新成果——酸蚀孔洞形成和生长过程中的分形与分维特征、水平井地层伤害沿水平井筒的椭圆柱体分布形态以及水平井油藏渗透率各向异性特性,提出了一种碳酸盐岩油藏水平井表皮因子综合模型,从而为上述问题的探讨在一定程度上提供了理论基础和可能途径.
Horizontal well mining is one of the main methods widely used in the exploitation of complex reservoirs such as thin layers and low permeability in shale in recent years.However, how to comprehensively investigate some major factors from reservoir, acid and acidification process is especially difficult One of the problems encountered in the design and evaluation of horizontal well acidification technology for horizontal wells in carbonate reservoirs is the random factor that causes the formation and growth of acid-etched holes described by the general method to affect the acidification effect. Considering the new achievements of contemporary fractal theory - the fractal and fractal features in the formation and growth of acid-etched holes, the distribution of elliptical cylinders along horizontal wellbore in horizontal well and the anisotropy of reservoir permeability in horizontal wells, A comprehensive model of horizontal well skin factor in carbonate reservoir is proposed, which provides a theoretical basis and a possible approach for the above problems to some extent.