电成像测井技术在北部湾盆地涠洲油田沉积相研究中的应用  

Application of Electric Imaging Logging Technology in Sedimentary Facies Study of Weizhou Formation in Weixi'nan Sag,Beibu Gulf Basin

作　　者：许梦 黄苏卫 张杨硕 XU Meng;HUANG Suwei;ZHANG Yangshuo(SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司,上海200120

出　　处：《海洋石油》2024年第2期62-68,共7页Offshore Oil

摘　　要：北部湾盆地涠西南凹陷具有良好的油气成藏条件,涠洲组作为主要勘探层系之一,岩性差异性大,构造背景复杂,仅依靠常规测井、分析化验等资料不足以满足油气勘探工作中物源方向和沉积微相分析的需要。在区内地质研究的基础上,通过对电成像测井资料中静态图像和倾角矢量等关键地质信息的分析,开展涠洲组沉积相的成像测井研究,确定了砂泥岩岩性界面,识别出水平层理、交错层理等多种沉积构造;同时分析了研究区古水流方向,优势方向是北西和北东方向;建立了分支河道和水下分支河道的沉积微相的成像解释图版。研究成果对涠西南凹陷涠洲组沉积体的深化研究和物源方向的进一步落实起到了重要作用,对凹陷下一步油气勘探部署提供一定技术支持。Weixi'nan Sag of Beibu Gulf Basin has good oil and gas accumulation conditions.As one of the main exploration strata,the lithology of Weizhou Formation,varies greatly and the tectonic setting is complex.Conventional logging,analysis and laboratory data can not meet the needs of source direction and sedimentary microfacies analysis in oil and gas exploration.On the basis of the geological research in the area,through the analysis of key geological information such as static images and dip vectors in the electric imaging logging data,the imaging logging research of the sedimentary facies of Weizhou Formation was carried out.In this paper,the lithological interface of the sand and mudstone was determined,and various sedimentary structures such as horizontal bedding and cross-bedding were identified.At the same time,the paleocurrent direction in the study area was analyzed:the dominant directions were north-west and north-east.Imaging interpretation plates of the sedimentary microfacies of the branch channel and underwater branch channel were established.The research results play an important role in the deepen study of the sediments of Weizhou Formation in Weixi'nan Sag and the further implementation of provenance direction.They also provide certain technical support for next oil and gas exploration and deployment of the sag.

关 键 词：电成像测井 古水流方向 沉积构造 沉积微相 涠洲组 涠西南凹陷 

分 类 号：P631.8[天文地球—地质矿产勘探]