琼东南盆地深水区潜山油气成藏条件分析及有利目标预测——以陵南低凸起为例  

Analysis of hydrocarbon accumulation conditions and prediction of favorable targets for the buried-hill in the deep water area of Qiongdongnan Basin:Case study of Lingnan Low Uplift

作　　者：卫志杰 甘军 吴怡 李金池 何文涛 王文博 WEI Zhijie;GAN Jun;WU Yi;LI Jinchi;HE Wentao;WANG Wenbo(Hainan Branch of CNOOC Limited,Haikou 570100,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

出　　处：《天然气地球科学》2024年第2期313-326,共14页Natural Gas Geoscience

基　　金：中国海洋石油有限公司“十四五”重大科技项目(编号:KJGG2022-0103);国家重点研发计划课题(编号:2019YFA0708500)联合资助。

摘　　要：古潜山是南海西部琼东南盆地深水区重要的油气勘探领域,其中陵南低凸起古潜山领域天然气资源探明程度低,勘探潜力大。为加快陵南低凸起古潜山领域勘探进程,开展烃源条件、储盖组合、输导体系等油气成藏条件的综合评价,同时结合多种地球物理手段预测潜山裂缝型储层,提出后续评价有利目标。结果表明:①陵南低凸起古潜山紧邻乐东—陵水富生烃凹陷,发育新生界厚层海相泥岩盖层与中生界花岗岩潜山储层优势储盖组合,具有大型沟源断裂、潜山内幕断裂、继承性构造脊等组成的复合运移模式以及源储压差大、近源充注的优势,成藏条件优越;②应用似然体、蚂蚁体、曲率体以及属性融合技术,结合区域构造应力场以及主要断层产状,综合预测陵南低凸起潜山裂缝型储层的展布特征,圈定有利勘探区带陵1构造、陵4构造,有助于推动后续勘探评价工作的进行。陵南低凸起古潜山整体油气成藏条件优越,预测多个构造储层发育,规模成藏概率大,是琼东南盆地继中央峡谷水道之外又一深水油气勘探新的有利方向。The granitic buried-hill is an important oil and gas exploration field in the deep water area of the Qion⁃gdongnan Basin in the western part of the South China Sea,among which the granitic buried-hill area of the Lingnan Low Uplift has a low degree of natural gas resources exploration and great exploration potential.In or⁃der to accelerate the exploration process of the buried-hill on the Lingnan Low Uplift,the comprehensive evalua⁃tion of hydrocarbon accumulation conditions such as hydrocarbon source conditions,reservoir cap combination,and transmission system was carried out,and a variety of geophysical means were combined to predict the frac⁃ture reservoirs in the buried-hill and pointed out favorable targets for subsequent evaluation.The results show that:(1)The buried-hill on the Lingnan Low Uplift,adjacent to the Ledong-Lingshui hydrocarbon-rich sag,developing the coupled reservoir cap assemblage composed of Neogene thick cover of marine mudstone and Me⁃sozoic granite buried-hill reservoir,having the advantages of composite migration mode composed of large source-connected faults,buried-hill insider faults and inherited structural ridges,as well as large source storage pressure difference and near-source charging,has superior storage conditions.(2)The application of likelihood,ant body,curvature body and attribute fusion technology,combined with regional tectonic stress field and main fault production status,comprehensively predict the spread characteristics of the buried-hill fracture reservoirs in the Lingnan Low Uplift,and delineate the favorable exploration area,such as Ling 1 and Ling 4,which is help⁃ful to promote the subsequent exploration and evaluation work.The Lingnan Low Uplift,having excellent hy⁃drocarbon accumulation conditions,which is predicted that there are multiple tectonic zones with reservoir devel⁃opment and high probability of large-scale accumulation,is a new favorable direction for oil and gas exploration in the deep water areas in addition to the Central Canyon of t

关 键 词：陵南低凸起潜山 琼东南盆地 深水油气勘探 油气成藏条件 属性体 属性融合 裂缝型储层预测 

分 类 号：TE122.3[石油与天然气工程—油气勘探]