吐哈盆地中三叠统辫状河三角洲砂体储集性及控制因素  

RESERVOIR CHARACTERISTICS AND CONTROLLING FACTORS OF BRAIDED STEAM DELTA SANDBODIES OF MIDDLE TRIASSIC SERIES IN TUHA BASIN

作　　者：张立强[1] 纪友亮[1] 尚刚[1] 

机构地区：[1]石油大学中国石油天然气集团公司油气储层重点实验室,山东东营257061

出　　处：《石油大学学报（自然科学版）》2001年第4期5-9,共5页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：国家"973"项目 (G19990 4330 4)

摘　　要：:辫状河三角洲砂体是吐哈盆地台南凹陷吐玉克地区重要的储油层系 ,主要发育有前缘分流河道、河口坝、分流河道间、平原辫状河道以及辫状河道间等砂体类型。其储集特征主要受岩性、沉积微相、成岩作用等因素控制 ,前缘分流河道砂体和河口坝砂体物性好 ,原生孔隙及次生孔隙均较发育 ,辫状河道及河道间砂体物性较差。结合本区实际情况 ,将中三叠统辫状河三角洲储层划分为高孔高渗、中高孔中渗、中孔低渗和中低孔低渗储层 4种类型 ,且以中高孔中渗储层为主。主要目的层系为中三叠统中部砂层组。The braided steam delta sandbody is one of the most important oil bearing system in Tuha basin. In this system, front distributary channel, mouth bar, interdistributary channel, plain braided channel and inter braided channel are main sandbodies in Tuyuke area of Tainan sag in Tuha basin. The reservoir properties are under the control of lithology, sedimentary microface and diagenesis over reservoir development. Reservoir capability of distributary channel sandbody and mouth bar sandbody is better because well development of primary pore and secondary pore. Reservoir capability of sandbody in braided channel and inter channel is worse in this area. The braided steam delta reservoir of middle Triassic can be divided into four types of high porosity and high permeability reservoirs, middle to high porosity and middle permeability reservoirs, middle porosity and low permeability reservoirs, middle low porosity and low permeability reservoirs. Among the four types, the second one is a main type reservoir in this area. The middle sand groups of middle Triassic are the main bed for study.

关 键 词：吐哈盆地 油气地质 中三叠统 辫状河三角洲 砂体 物性 储集空间 沉积微相 成岩作用 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]