饶阳凹陷任丘潜山内幕变质岩凝析油气藏的勘探潜力  

Exploration potential of metamorphic rock condensate reservoirs inside Renqiu buried hill,Raoyang sag

作　　者：张成武 樊晟阳 张平生 窦航 贾元钊 孙江虹 ZHANG Chengwu;FAN Shengyang;ZHANG Pingsheng;DOU Hang;JIA Yuanzhao;SUN Jianghong(No.2 Mud Logging Company,BHDC,CNPC,Renqiu,Hebei 062552,China;Liaodong Operating Company of CNOOC China Limited Tianjin Company,Tianjin 300457,China;CNPC International Oversea Management Ltd.,Beijing 100032,China)

机构地区：[1]中国石油渤海钻探第二录井公司 [2]中海石油(中国)天津分公司辽东作业公司 [3]中石油阿姆河天然气勘探开发(北京)有限公司

出　　处：《录井工程》2024年第3期146-156,共11页Mud Logging Engineering

摘　　要：饶阳凹陷是冀中坳陷潜山油藏规模最大的富油凹陷,于奥陶系、寒武系、蓟县系、长城系均见较高储量油气藏,但太古宇潜山内幕变质岩油气藏一直没有突破。针对该问题,以NG 1井高于庄组高产凝析油气为研究目标,论证该井油气来自串岭沟组暗色泥岩、页岩。以河间潜山、留路潜山钻至太古宇地层的井为研究对象,剖析已知潜山内幕地震剖面地震特征,加强区域潜山内幕地层厚度分布及层位对比研究,分析潜山断裂结构,精细梳理断层;准确追踪解释任丘潜山内幕变质岩,完成了变质岩顶面构造图,同时从生储盖及成藏模式方面分析研究了潜山内幕变质岩勘探潜力及方向。结果表明:潜山内幕变质岩油气主要来自长城系串岭沟组的暗色泥岩、页岩,其分布范围广、厚度大,属于中等-好烃源岩;并发育任西断层裂缝带、潜山顶面风化壳裂缝带等优质储层;内幕变质岩地震相可分为不连续杂乱反射型、错断反射型、断面波反射型、近平直近连续反射型;建立饶阳凹陷任丘潜山内幕变质岩凝析油气藏成藏模式,识别出断裂破碎带、顶部风化壳破碎带及内幕断裂破碎带3种类型油气藏。精细对比优选了任丘潜山R 7山头有利目标,为凝析油气藏的勘探指明方向,如果任丘潜山内幕变质岩凝析油气藏钻探成功,可为华北油田太古宇领域的勘探打开新局面。Raoyang sag is a oil-rich sag with the largest buried hill reservoirs in Jizhong depression and high reserves of reservoirs found in the Ordovician,Cambrian,Jixianian and Changchengian Systems.However,there has been no breakthrough in the metamorphic rock reservoirs inside the Archaeozoic buried hills.To solve this problem,the Gaoyuzhuang Formation high-yielding condensate oil/gas in well NG 1 is taken as a research objective to prove that the oil and gas in well NG 1 come from the dark mudstone and shale of Chuanlinggou Formation.The wells drilled from Hejian buried hill and Liulu buried hill to the Archaean Formation were taken as the research objects,the seismic characteristics of the known buried hill inside seismic profile were analyzed,the study on the regional buried hill inside formation thickness distribution and horizon correlation was strengthened,the faulted structure of the buried hills was analyzed,the faults were finely sorted out,the metamorphic rocks inside Renqiu buried hill were traced and interpreted accurately,and the structural map of the top surface of the metamorphic rocks was completed.At the same time,the exploration potential and direction of the metamorphic rocks inside Renqiu buried hill were analyzed and studied from the aspects of source-reservoir-cap and reservoir-forming model.The results show that the oil and gas of metamorphic rocks inside the buried hills mainly come from the dark mudstone and shale of the Chuanlinggou Formation of the Changchengian System,which have a wide distribution range and large thickness,belonging to medium-good source rocks,and develop high-quality reservoirs such as the Renxi faulted fracture zone and the buried hill top surface weathering crust fracture zone.The seismic facies of the metamorphic rocks inside the buried hills can be divided into discontinuous and chaotic reflection type,leap reflection type,fault plane wave reflection type,and near-straight and near-continuous reflection type.The reservoir-forming model of the condensate reservoirs fo

关 键 词：潜山内幕 变质岩 凝析油气藏 成藏条件 油藏模式 勘探潜力 饶阳凹陷 

分 类 号：TE132.1[石油与天然气工程—油气勘探]