海洋地质前沿2025，Vol.41Issue(5)：32-42,11.DOI:10.16028/j.1009-2722.2024.143
南海北部湾盆地涠西南凹陷渐新统涠洲组成岩作用及优质储层预测
Diagenesis and prediction of high quality reservoirs in the Oligocene Weizhou Formation in the Weixi'nan Sag of the Beibu Gulf Basin,South China Sea
摘要
Abstract
To explore the diagenesis and development pattern of quality reservoirs in the Weizhou Formation in the Weixi'nan Sag,Beibu Gulf Basin,South China Sea,taking the Third Member of the Oligocene Weizhou Formation in the Weizhou X Oilfield as an example,the types and mechanisms of diagenesis,the sequence of dia-genetic evolution,and the division and distribution of diagenetic facies were analyzed in depth through techniques such as thin section microscopy identification,scanning electron microscopy,cathodoluminescence,and numeric-al simulation of diagenesis.The main controlling factors and selection of quality reservoirs were determined.Res-ults show that the compaction effect of the reservoir in the Third Member is moderate showing mainly point-line or line-line contact.Different types of clay minerals were involved in the cementation process,which occurred in mainly the favorable stage of A12-A21 micro-facies of diagenesis.The research area has experienced acidic and then alkaline dissolution and the most prominent products are the acid-alkaline dissolution products of typical ka-olinite and chlorite.The sedimentary diagenetic micro-facies of A12 in distributary channel are the favorite zones of development of quality reservoirs in the study area.关键词
成岩作用/沉积-成岩相/优质储层/涠洲组/涠西南凹陷Key words
diagenesis/sedimentary diagenetic facies/high quality reservoir/Weizhou Formation/Weixi'nan Sag分类
地质学引用本文复制引用
朱金起,张乔良,杨朝强,郇金来,王光..南海北部湾盆地涠西南凹陷渐新统涠洲组成岩作用及优质储层预测[J].海洋地质前沿,2025,41(5):32-42,11.基金项目
中国海洋石油有限公司"十四五"重大科技项目"海上油藏气驱提高采收率技术"(KJGG2021-0505) （KJGG2021-0505）
