塔里木盆地北部三叠系辫状三角洲砂体储层非均质性研究─—以阿克库勒—达里亚地区为例

A STUDY ON THE HETEROGENEITY OF SAND BODY RESERVOIRS IN TRIASSIC BRAIDED DELTA, NORTHERN TARIM BASIN──EXEMPLIFIED BY AKEKULE──DALIYA REGION

张希明 王恕一

Zhang Ximing Wang Shuyi

地矿部西北石油地质局, 乌鲁木齐, 830011 2. 地矿部石油地质中心实验室, 无锡, 214151

Northwest Bureau of Petroleum Geology, MGMR, Urumqi, 830011 2. Central Laboratory of Petroleum Geology, MGMR, Wuxi, 214151

塔里木盆地北部三叠系辫状三角洲砂体是本区主要的油气藏宿主储层之一,按其沉积特征可划分为前缘亚相、平原亚相．根据野外典型剖面的类比及钻井岩芯的详细分析,阿克库勒—达里亚地区的辨状三角洲砂体可划分出6组界面和9个构型单元.按其特征和规模其非均质性可分为4类级别,它们不同程度地对油气的富集起着控制作用,造成了储层沉积体在纵、横向上含油气性能的差异.

The Sand body of Triassic braided delta in northwest Tarim basin is one of the major hosting reservoirs of oil/gas pools in this area,which can be divided into a frontal subfacies and plain subfacies according to their depositional features.Based on the analogy of typical sections in field and detailed analyses of drilling cores,six classes of bounding surface and nine architectural units are identified for the sand body of braided delta in Akekule——Daliya region.Furthermore,in view of the features and scale,the hetero-geneity can be classified into four classes,whieh will control the enrichment of oil/gas to different extents,resulting in a petroliferous difference in the sedimentary reservoir bodies either vertically,laterally or upwards.

国控85-101-04-01专题

https://doi.org/10.11781/sysydz199703201