北部湾盆地涠西南凹陷D洼新近系稠油成因及资源潜力分析  

Genesis and Resource Potential Analysis of Neogene Heavy Oil in D Sub-sag,Weixinan Sag,Beibuwan Basin

作　　者：戚家振 黄建军[1] 杨鹏程[1] 刘峰[1] 黄苏卫 黄家琳 陈现[1] QI Jiazhen;HUANG Jianjun;YANG Pengcheng;LIU Feng;HUANG Suwei;HUANG Jialin;CHEN Xian(Institute of Exploration and Development,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勘探开发研究院,上海200120

出　　处：《海洋石油》2022年第1期13-18,共6页Offshore Oil

基　　金：中国石化股份公司油田事业部重大勘探导向项目,海域探区区带评价与突破目标优选(YTBXD-01-SH12-2019)。

摘　　要：北部湾盆地涠西南凹陷自开展油气勘探活动以来,在主洼先后发现多个油田,而D洼勘探直到近几年才取得突破性进展。针对D洼的研究尤其是对新近系浅层首次发现的稠油油藏缺乏认识的问题,该文利用新井资料及周边区域地质资料,运用地球化学及成藏等综合分析方法,对涠西南凹陷D洼稠油特征、成因机制及主要成藏条件进行了系统的研究分析,取得了一系列的研究成果。研究发现D洼稠油为生物降解形成的高密度、高黏度、高沥青质、低含硫含蜡次生稠油。同时利用其成藏机理预测了整个D洼新近系浅层可能存在的含油气圈闭,研究成果对今后在涠西南凹陷D洼浅层勘探具有重要的理论指导意义。Since the oil and gas exploration activities were carried out in Weixinan Sag of Beibu Gulf Basin,several oilfields have been found in the main depression,while the exploration of D Sub-sag has not made a breakthrough until recent years.The research on D Sub-sag,especially the first discovery of the heavy oil reservoir in Neogene,is lack of knowledge.In view of this problem,the characteristics,genetic mechanism and main reservoir forming conditions of the heavy oil in D Sub-sag of Weixinan Sag are systematically studied and analyzed by using new well data and regional geological data,geochemical and reservoir forming methods,and a series of research results are obtained.It is found that the heavy oil in D Sub-sag is the secondary heavy oil with high density,high viscosity,high asphaltene,low sulfur and wax content.At the same time,potential hydrocarbon traps of the whole D Sub-sag in Neogene are predicted by using the reservoir forming mechanism.The research results have important theoretical guiding significance for the future shallow exploration in D Sub-sag of Weixinan Sag.

关 键 词：涠西南凹陷 D洼 稠油 成因机制 资源潜力 

分 类 号：P618.13[天文地球—矿床学]