沉积岩中溶蚀作用对储集层的改造研究进展  

Research Progress of Modification of Reservoirs by Dissolution in Sedimentary Rock

作　　者：陈启林[1] 黄成刚[1] Chen Qilin;Huang Chenggang(PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China)

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《地球科学进展》2018年第11期1112-1129,共18页Advances in Earth Science

基　　金：国家科技重大专项项目"岩性地层油气藏成藏规律;关键技术及目标评价"(编号:2017ZX05001);中国石油集团公司重大科技专项项目"大中型岩性地层油气藏富集规律与关键技术"(编号:2016B-0301)资助~~

摘　　要：随着油气勘探程度的加深、勘探技术的进步以及对油气资源需求的日益增长,一些埋藏较深、物性相对较差的储集层也越来越受到地质学家们的关注。经过数十年的勘探,许多油田埋藏较浅、原生孔隙保存较好的优质储层已被广泛发现并投入生产,而埋藏较深、以次生溶蚀孔为主要储集空间的较致密储层,正日益成为成熟探区勘探挖潜的重点。因此,寻找次生孔隙发育带的溶蚀孔隙甜点储层成为精细勘探的重要新领域。通过研究一些典型实例及大量研究成果的综述,从以下4个方面系统阐述了溶蚀作用对储集层的改造:(1)溶蚀作用发生的成岩阶段;(2)溶蚀流体的类型;(3)溶蚀作用强弱的主控因素;(4)溶蚀作用对储集层的改造效果。近年来,已有较多的研究成果在溶蚀机理和对储集层的改造效果方面取得了重要进展,通过对这些主流观点的系统梳理,可对今后类似地质条件的研究提供重要的参考。With the deepening of exploration degree, the progress of exploration technology and the increasing demands for oil and gas resources, some deep buried reservoirs with relatively poor physical properties have attracted more and more attention of geologists. After decades of exploration, many high-quality reservoirs with shallow burial and well-preserved primary pores have been widely discovered and put into production. However, deep buried tight reservoirs with secondary dissolved pores as the main reservoir space are increasingly becoming the focus of exploration in mature exploration areas. Therefore, searching for secondary pore development zones and dissolved "sweet" reservoirs will become an important new field for fine exploration in the future. Based on some typical case studies and a large number of research results, this paper systematically expounded the modification of reservoirs by dissolution from the following four aspects:①Diagenetic stage of dissolution; ②Types of dissolution fluids;③Main controlling factors of dissolution; ④Effect of dissolution on reservoir modification. In recent years, more and more research achievements have made important progress in dissolution mechanism and reservoir modification effect. The systematic analysis of these mainstream views has some reference value for similar geological conditions in the future.

关 键 词：溶蚀作用 有机酸 大气淡水 硫酸盐热化学还原作用(TSR) 热液 

分 类 号：P581[天文地球—岩石学]