碳酸盐岩基质酸化/酸压裂中形成虫孔研究新进展  

New Developments in Understanding Wormholing in Carbonate Formations during Matrix Acidizing/Acid Fracturing

作　　者：张汝生[1] 卢拥军[1] 丁云宏[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《油田化学》2005年第3期276-278,共3页Oilfield Chemistry

摘　　要：本综述基于1997～2000年发表的12篇美国SPE论文.前言中指出本论题的意义、目前尚未解决的问题及国外领先研究机构.第一大节中指出虫孔生长判据为Damkohler数,其表达式含有虫孔中酸流通量,最佳值主要决定于最大孔隙直径,最佳酸流通量与温度倒数间关系对酸液选择和现场施工有指导意义.第二大节中指出,非裂缝性碳酸盐岩油气藏基质酸化中只生成虫孔,酸压裂中只产生表面粗糙的裂缝,裂缝性碳酸盐岩油气藏中酸蚀虫孔的生成与裂缝宽度有关.第三大节简介了虫孔几何分布的实验研究结果,指出用计算机模拟法得到了按不同模型生长的虫孔三维图象.参12.This review is compiled on the basis of 12 SPE papers published in 1997-2000. In the introductory part of the review the meaning, the unsolved problems and the leading research laboratories are presented for the topic. In the 1st part it is stated that the criterion of wormhole initiation and evolution is Damkohler number, Da, which is related to, in particular, acid flow rate in wormholes, q, and the optimal value of Da is dependent upon the largest pore diameter; the relationships between optimal value of q and reciprocal temperature are useful to acidizing fluid selection and field operation performing. In the 2nd part it is stated that in fracture-free carbonate formations wormholing is the only acid etching pattern in matrix acidizing and fractures with coarse wall surfaces are created in acid fracturing; wormboling in fractured carbonate formations is dependent upon the width of the acid etching fractures. The 3rd part presents briefly the results of experimental study on geometric distribution of wormholes and states that 3D images of acid wormholes have been obtained by the way of computer simulation using various models.

关 键 词：基质酸化 酸压裂 虫孔生成 碳酸盐岩油气藏 裂缝性油气藏 综述 

分 类 号：TE357.21[石油与天然气工程—油气田开发工程]