碳酸盐岩酸蚀蚓孔等效渗透率影响因素研究  

A Study on Factors Affecting Equivalent Permeability of Carbonate Corrosion

作　　者：严伟丽 许崇祯 陈坤 YAN Weili;XU Chongzhen;CHEN Kun(College of Geophysics and Petroleum Resources, Yangtze University, Wuhan, Hubei 430100, China;Jiangsu Petrochemical Company, Sinopec Sales Co. Ltd., Nanjing, Jiangsu 210000, China)

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100 [2]中石化销售股份有限公司江苏石油分公司,江苏南京210000

出　　处：《中国锰业》2020年第2期22-24,共3页China Manganese Industry

基　　金：国家科技重大专项(2016ZX05060-002)。

摘　　要：在碳酸盐岩储层在开发过程中,随着一段时间的生产,外来流体的侵入以及地层中的微粒会使得近井筒地带的储层受到污染从而渗透率下降,因此需要引入增产措施来改善地层渗透性。针对碳酸盐岩储层基质酸化形成的酸蚀蚓孔特点,基于基质酸化机理和分形理论,借助编制的VB软件,运用“点到圆”二分叉树状分形网络渗流模型,分析了二分叉网络长度分布分形维数、二分叉网络半径分布分形维数、二分叉网络分叉级数以及二分叉网络分叉角对蚓孔区无量纲等效渗透率的影响。In the development of carbonate reservoirs,the intrusion of external fluids and the particles in the formation will cause the reservoir in the near wellbore to be contaminated.The permeability will decrease with the production of a period of time.Therefore,it is necessary to introduce stimulation measures to improve Formation permeability.According to the acidification mechanism and fractal theory of carbonate acid reservoir matrix formation,the VB software,on the matrix acidification mechanism and fractal theory,was used to analyze the seepage model of the point-to-circle bifurcation tree fractal network.This is the effect of bifurcation network length distribution fractal dimension,including the bifurcation network radius distribution in fractal dimension,bifurcation network bifurcation series and bifurcation network bifurcation angle on the dimensionless equivalent permeability of the pupil region.

关 键 词：碳酸盐岩 基质酸化 酸蚀蚓孔 等效渗透率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]