塔中地区奥陶系热液溶蚀作用特征及其对储层物性的影响  

Charatistics of the Ordovician Hydrothermal Dissolution Activity and Impact to the Reservoir's Physical Property in Tazhong Area

作　　者：袁立[1] 姚君波[1] 韩杰[2] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《重庆科技学院学报（自然科学版）》2013年第4期1-4,9,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家重点基础研究发展计划(973计划)(2011CB201106)

摘　　要：介绍塔中地区碳酸盐岩溶蚀、热液白云岩化的标志,并识别出4种热液矿物组合。包裹体测温数据显示,热液产生于深埋藏作用,塔里木盆地奥陶系碳酸盐岩所经历过的热事件主要有3期。奥陶系碳酸盐岩热液对灰岩的溶蚀作用改善了岩石物性,而遭受白云岩化之后物性改善并不明显,作用于碳酸盐岩后使岩石的孔隙度和渗透率明显增加。热液流体的驱动力来自构造挤压,而不整合面和层位控制的热液溶蚀灰岩是该区重要的储层类型。This paper analyzes the chemical dissolution and hydrothermal dolomitisation distribution in Tazhong area,and four hydrothermal minerals combinations are identified.It experienced three stages of thermal event in the Ordovician carbonate rock in Tarim basin through inclusion thermometry.And through physical property measurement we can safely draw the conclusion that hydrothermal dissolution improved the rock physical property of limestone,while the dolomitisation′s improment of rock physical property is not remarkable.Hydrothermal impact increase the rock porosity and permeability.It is the tectonic compression that drove the hydrothermal fluid,and unconformity surface and strata-bound hydrothermal dissolution limestone is a important reservoir form.

关 键 词：塔中地区 热液作用 溶蚀作用 储层物性 

分 类 号：P618[天文地球—矿床学]