构造转换带源汇系统控储作用——以珠江口盆地惠州凹陷惠州26转换带为例  

Control of Source-Sink System of Transfer Zone on Reservoir Quality:A Case Study from Huizhou 26 Transfer Zone in Huizhou Sag of Pearl River Mouth Basin

作　　者：林璐 蔡俊杰 刘杰 牛胜利 王菲 LIN Lu;CAI Junjie;LIU Jie;NIU Shengli;WANG Fei(Hainan Branch,CNOOC(China)Co.,Ltd.,Haikou,Hainan 570100,China;Shenzhen Branch,CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518054,China)

机构地区：[1]中海石油(中国)有限公司海南分公司,海南海口570100 [2]中海石油(中国)有限公司深圳分公司,广东深圳518054

出　　处：《西安石油大学学报（自然科学版）》2024年第3期21-33,共13页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：“十四五”重大科技项目“海上深层/超深层油气勘探技术”(KJGG2022-0403)。

摘　　要：为明确惠州26转换带源汇系统对沉积砂体储层物性的控制作用,基于钻测井、地震、岩心等资料,刻画源汇系统的要素特征,分析沉积砂体储层物性特征,进而明确惠州26转换带不同时期源汇耦合模式及其控储作用。结果表明,在物源体系上,惠州26转换带在文昌期—恩平期持续受到南部东沙隆起的物源供给;在搬运体系上,沟谷形态发生了由文昌期V型向恩平期U型的转换;在沉积体系上,惠州26转换带经历了深水窄盆小扇—浅水广盆大扇—浅水广盆辫状三角洲的沉积演化过程。认为研究区储层质量受搬运距离和沉积相带等控制,在相同沉积体系内,搬运距离越长,越容易发育优质储层;经转换斜坡入湖并远距离搬运的辫状河三角洲内前缘水下分流河道微相为最优势相带,砂体储层物性最优。In order to clarify the control effect of the source-sink system on the physical properties of reservoirs,the essential features of the source-sink system in the Huizhou 26 transfer zone are characterized and the physical properties of sedimentary sandbody reservoirs are analyzed based on drilling,logging,seismic,rock core and other data.Furthermore,the source-sink coupling mode and its control effect on the reservoirs in different periods in the Huizhou 26 transfer zone are clarified.The results show that the provenance of the Huizhou 26 transfer zone was continuously supplied by the southern Dongsha uplift during the Wenchang-Enping period;In terms of transportation system,the morphology of valleys changed from a V-shape during the Wenchang period to a U-shape during the Enping period;In terms of sedimentary system,the Huizhou 26 transfer zone experienced a sedimentary evolution process of from deep-water narrow fan,shallow-water wide fan to shallow-water wide basin braided delta during the Wenchang-Enping period.Based on the analysis of the source-sink system and the physical properties of the reservoirs,it is held that the reservoir quality in the study area is controlled by transportation distance and sedimentary facies zones.Within the same sedimentary system,the longer the transportation distance,the more developed the high-quality reservoirs;The front underwater distributary channel microfacies in the braided river delta,which have been transformed into the lake from a slope and transported over a long distance,are the most favorable facies belts,and the physical properties of its sandbody reservoirs are the best.

关 键 词：源-汇系统 储层物性 惠州凹陷 构造转换带 

分 类 号：TE121.3[石油与天然气工程—油气勘探]