碳酸盐岩油藏基质酸化水平井表皮因子模型研究(Ⅰ)理论模型建立

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.

Study on the Skin Factor Model for a Horizontal Well of Carbonate Reservoir with the Matrix Acidizing Treated(I) Establishment of the Theoretical Model

: After considering the fractal characteristics in the process of wormhole forming, the elliptical cylinder distribution of damage along the well bore of the horizontal well and the permeability anisotropy.the paper presents a comprehensine model of the skin factor for a horizontal well of carbonate reservoir with thematrix acidizing treated. To a certain extent,it provides a theoretical basis and a possible way for discussing the question of how to investigate the effects of the following factors on the results of acidizing treatment: factors coming from the reservoir,and acid fluid,factors arising in the acidizing process and esp. the stochastic factors for wormhole forming and growing.