地质学报2024，Vol.98Issue(1)：247-265,19.DOI:10.19762/j.cnki.dizhixuebao.2023271
西湖凹陷平北地区武云亭凝析气田形成条件与成藏特征
Formation conditions and reservoir forming characteristics of the Wuyunting condensate gas field in northern Pinghu slope zone of the Xihu sag
摘要
Abstract
Based on the summary of the basic conditions of hydrocarbon reservoir formation such as source rock,reservoir and trap in the Wuyunting area,this study systematically analyzes the characteristics and sources of oil and gas,pressure distribution and fault sealing,the history of hydrocarbon charging and accumulation,the process of hydrocarbon migration and accumulation,to establish the reservoir forming model of Wuyunting condensate gas field.Research shows that many factors jointly control formation of the Wuyunting condensate gas field,such as the strong hydrocarbon-generating capacity of widely distributed coal-measure source rocks in the Wuyunting sag and source rocks in the Ningbo 27 main sag,faults and sandstone pinch-out line controlled large-scale structural lithologic composite traps,the development of high-quality delta sedimentary reservoirs,favorable fault sand configuration and good caprock quality.The reservoir forming assemblage in the middle and lower part of Pinghu Formation of Wuyunting oil and gas field has the characteristics of"hydrocarbon supply from coal measure source rock in Wuyunting sag and continuous weak overpressure charging within the source rock";the upper and middle part of the reservoir forming assemblage has the characteristics of"double source hydrocarbon supply from Wuyunting sag and Ningbo 27 sag,and continuous strong lateral charging".The Early bidirectional source crude oil mixed with late large-scale lateral source high-mature gas to form condensate gas reservoir.Wuyunting oil and gas field is generally characterized by"early oil and late gas,multi-stage reservoir formation and continuous filling",and a reservoir formation mode of"multi-source continuous strong filling and sand breaking combined control"is established.The Wuyunting oil and gas field generally has the characteristics of"early oil and late gas,multi-stage accumulation and continuous charging",so the accumulation model of"multi-source continuous strong charging,fault-sand joint control"has been established.关键词
成藏特征/成藏模式/平湖组/武云亭凝析气田/西湖凹陷Key words
reservoir forming characteristics/reservoir forming model/Pinghu Formation/Wuyunting condensate gas field/Xihu sag引用本文复制引用
屈童,黄志龙,李天军,杨易卓,王柏然,王瑞..西湖凹陷平北地区武云亭凝析气田形成条件与成藏特征[J].地质学报,2024,98(1):247-265,19.基金项目
本文为国家科技重大专项"低渗-致密储层流体性质录井识别技术"(编号2016ZX05027-002-001)资助的成果. （编号2016ZX05027-002-001）
