摘要
为了分析南堡凹陷不同类型断裂对油气分布的控制作用,首先利用生长指数剖面法、主干断裂活动速率法和剖面伸展率法分析断裂的主要活动时期和各时期应力性质,然后在此基础上划分断裂系统,研究每套断裂系统对油气运聚的控制作用,分析下一步勘探有利区。研究认为:南堡凹陷断裂主要活动时期分别为古近系沙河街组三段、东营组沉积末期和新近系明化镇组沉积时期,其性质分别为伸展变形、走滑伸展和张扭变形;依据南堡凹陷断裂"3期3性质"的演化特征,可将断裂划分为6套断裂系统;第1成藏关键时期发育5套断裂系统,V型和VI型断裂系统起输导作用,第2成藏关键时期发育6套断裂系统,Ⅲ、V型和VI型断裂系统起输导作用;下一步勘探的重点应为高柳断裂以南中深部源岩层内Ⅰ、Ⅱ和Ⅳ型断裂系统控制的构造高部位。
In order to analyze the controlling actions of different types of the fractures on the oil and gas distribution in Nanpu Sag,the main fracture acting periods and stress properties in each period were first analyzed by the following methods: fracture growth index profile,key fracture action rate and profile elongation rate,and then the fracture systems were divided to research the controlling actions of each system on the petroleum migration and accumulation,and furthermore the future favorable exploration area was figured out. The studies show that the main activating periods of Nanpu Sag fractures are respectively Member 3rd of Palaeogene Shahejie Formation,end period of Dongying Formation sedimentation and sedimentary period of Neogene Minghuazhen Formation,the characteristics or qualities are expanding deformation,slip stretch and tenso-shear deformation; according to the fracture evolutional characteristics of '3 periods & 3 properties'in Nanpu sag,six sets of the fracture systems can be classified; among the systems,five of them are developed in First Key Period,Type V and VI systems play the role of the transportation,six sets of the fracture systems are formed in Second Key Period,the same transportation roles are shown for Type III,V and VI systems; the future exploration is focused on the top structures controlled by Type I,II and IV fracture systems in the middle and deep source rocks in the south of Gaoliu Fracture.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2016年第4期22-27,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重大专项课题"中国大型气田形成条件
富集规律及目标评价"(2011ZX05007-002)
关键词
南堡凹陷
断裂系统
输导断裂
遮挡断裂
控制作用
Nanpu Sag
fracture system
transporting fracture
barrier fracture
controlling action
