塔中上奥陶统台缘礁滩体储层成岩作用及孔隙演化  

DIAGENESIS AND POROSITY EVOLUTION OF UPPER ORDOVICIAN PLATFORM MARGIN REEFS AND GRAIN BANKS RESIRVOIR IN TAZHONG AREA

作　　者：王振宇[1] 严威[1] 张云峰[1] 孙崇浩[1] 张丽娟[2] 邬光辉[2] 韩剑发[2] 申银民[2] 

机构地区：[1]西南石油大学,四川成都610500 [2]塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《新疆地质》2007年第3期287-290,共4页Xinjiang Geology

摘　　要：详细阐述了塔中上奥陶统台缘礁滩体主要成岩作用类型及其对礁滩体储层性质的影响,建立了碳酸盐岩成岩和孔隙演化史.方解石胶结作用是破坏孔隙和降低孔隙度的最主要因素,而溶蚀作用和构造破裂作用则是提高储层孔渗性能的极为重要的建设性成岩作用.礁型地貌隆起和海平面相对变化所控制的暴露,以及发育的成岩早期大气淡水溶蚀、淋滤作用和岩溶作用是控制塔中台缘礁滩体优质储层发育的根本原因.储层成岩和孔隙演化模式的建立揭示了孔隙演化的阶段及其独特性,对认识储层特征和进一步勘探均具重要意义.This article has detailedly elaborated the main diagenesis types of Upper Ordovician platform margin reefs and grain banks in TaZhong area and their affection on reef-bank reservoir quality. The carbonatite diagenesis and porosity evolution history have also been established. Calcite cementation is the most important reason for porosity damage and porosity decline. Denudation and tectonic disruption are the extremely important constructive diagenesis for the improvement of porosity-permeability property. Reef-type geomorphic uplift, exposure controlled by sea level changes and developed atmospheric fresh-water corrosion of early diagenesis, leaching and karstification are the essential reasons for high quality reservoir development of platform margin reef banks deposit in TaZhong area. Establishment of reservoir diagenesis and porosity evolution models have disclosed the stages and specialities of porosity evolution, which are of great importance to reservoir recognition and further exploration.

关 键 词：塔中地区 上奥陶统 孔隙演化 成岩作用 台缘礁滩体 

分 类 号：P618.13[天文地球—矿床学]