济阳坳陷潜山风险勘探方向浅析  

Brief discussion of risk exploration directions of buried hills in Jiyang Depression

作　　者：穆星[1] 王文彬 陈涛 牛子铖 张波[1] 孙超[1] MU Xing;WANG Wenbin;CHEN Tao;NIU Zicheng;ZHANG Bo;SUN Chao(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2024年第4期112-124,共13页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科技攻关课题“济阳坳陷太古界潜山油气成藏条件及目标评价”(P22034)。

摘　　要：济阳坳陷油气资源丰富,但随着勘探程度的不断深入,古近系常规油气藏的勘探难度不断加大,亟需拓展新领域,保障资源有效接替。济阳坳陷地层发育齐全,前古近系潜山分布广、厚度大,勘探潜力显著,但受限于深层潜山形成时间早、经历地质演化历程复杂、深部地震资料品质差等因素,勘探效果相对较差。近年来,随着实验技术持续攻关、基础地质研究不断深化、地震资料处理手段更加丰富,潜山钻探获得了不少好苗头,形成了多期构造共控成山、多套源岩联合供烃、多元共控优势成储、多种模式有序控藏的潜山油气成藏认识。通过对已发现油气藏的深入解剖,同时借鉴邻区的勘探经验,明确了济阳坳陷深层潜山勘探的风险方向和勘探目标,为济阳坳陷油气勘探潜力的进一步挖掘指明了方向。具体来讲,各层系的风险勘探方向为:太古界潜山内幕的断缝体、断溶体圈闭等;下古生界隐蔽性断块圈闭以及内幕颗粒滩、沿层溶蚀作用形成的岩性圈闭;上古生界埋深大于2000m的深层煤系气藏;中生界裂缝-砂体双控的岩性圈闭。Jiyang Depression is rich in petroleum resources.However,as the exploration degree intensifies,the exploration diffi‐culty of the Paleogene conventional petroleum reservoirs is increasing.Therefore,exploring new fields and ensuring the effective supplement of resources is urgent.The strata in Jiyang Depression is well developed,and the pre-Paleogene buried hill is widely dis‐tributed,with a great thickness and significant exploration potential.However,the exploration results are unsatisfactory due to the early formation of deep buried hills,complex geological evolution history,and poor quality of deep seismic data.In recent years,with continuous breakthroughs in experimental technologies,deepening research on basic geology,and massive seismic data pro‐cessing methods,the exploration of buried hills has yielded many promising leads.This has led to an understanding of petroleum ex‐ploration in buried hills characterized by multiple periods of structures contributing to hills,multiple sets of source rocks supplying hydrocarbons in conjunction,multi-element control of advantageous reservoir formation,and various modes of orderly controlling the reservoir.The risk direction and exploration targets for deep buried hills were clarified,and the ways for further petroleum poten‐tial exploration in Jiyang Depression were pointed out through an in-depth dissection of the discovered reservoirs,coupled with the exploration experience of neighboring areas.Specifically,the risk exploration directions for each stratum were as follows:fault-fractured bodies,fault-dissolved bodies,and other enclosures within the buried hills of the Archean;concealed fault block traps and internal grain beaches,as well as lithologic traps formed by layer-following dissolution of the lower Paleozoic;deep coal-measure gas reservoirs with a burial depth of greater than 2000 meters of the upper Paleozoic;lithologic traps controlled by frac‐tures and sand bodies of the Mesozoic.

关 键 词：潜山勘探 风险领域 断溶体 煤系气 走向运移 济阳坳陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]