摘要
近年来在大港油田探区内歧北潜山、乌马营潜山多口井石炭系-二叠系、奥陶系获得油气重大发现,潜山勘探重大突破揭示渤海湾深层古生界为新的含油气系统,通过重新评价黄骅坳陷古生界烃源岩、储盖组合及圈闭,发现油气源以来自石炭系-二叠系煤系烃源岩为主。研究表明,黄骅坳陷中南部古生界保留较完整,发育上古生界碎屑岩及下古生界碳酸盐岩两类储集体,与石炭系-二叠系煤系烃源岩形成有利的源储组合。石炭系-二叠系煤系烃源岩丰度高,干酪根以Ⅱ2 Ⅲ型为主,局部发育Ⅱ1型;多期构造运动造成煤系烃源岩具有两期生烃过程,其中孔店组沉积期至今为二次生烃期,该期大规模的油气充注、有利储盖组合与稳定构造的匹配关系决定油气富集程度。按照古生界含油气系统新一轮综合评价,渤海湾盆地古生界原生油气资源规模超万亿立方米,黄骅坳陷古生界含油气系统尤其是石炭系-二叠系含油气系统的勘探突破对渤海湾盆地相似领域的油气勘探具有启示意义。
In recent years,several wells in the Qibei and Wumaying buried hills of Dagang Oilfield tapped oil in the Carboniferous Permian and Ordovician strata.This major breakthrough reveals that the deep Paleozoic in the Bohai Bay is a new petroleum system.Through re-evaluating the Paleozoic source rock,reservoir-cap combinations and traps,it is found the oil and gas mainly come from Carboniferous Permian source rock.The study shows that the Paleozoic strata are well preserved in the central-south Huanghua Depression and developed two kinds of reservoirs,Upper Paleozoic clastic rock and Lower Paleozoic carbonate rock,which form favorable source-reservoir assemblages with Carboniferous Permian coal measure source rock.The Carboniferous Permian coal measure source rock is of high abundance,mainly type Ⅱ2-Ⅲ kerogen,and Ⅱ1 kerogen in local parts.Multi-stage tectonic movements resulted in two stages of hydrocarbon generation of the source rocks.The period from the deposition of Kongdian Formation to now is the second stage of hydrocarbon generation.The matching between large-scale oil and gas charging,favorable reservoir-cap combinations and stable structure determines the enrichment of oil and gas.According to the new comprehensive evaluation of Paleozoic petroleum system,the primary oil and gas resources of the Paleozoic in the Bohai Bay Basin are over 1 10 12 m3.The exploration breakthrough in Paleozoic petroleum system,especially Carboniferous Permian petroleum system in Huanghua Depression is inspirational for oil and gas exploration in similar provinces of Bohai Bay Basin.
作者
赵贤正
蒲秀刚
姜文亚
周立宏
金凤鸣
肖敦清
付立新
李宏军
ZHAO Xianzheng;PU Xiugang;JIANG Wenya;ZHOU Lihong;JIN Fengming;XIAO Dunqing;FU Lixin;LI Hongjun(Dagang Oilfield of CNPC,Tianjin 300280,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2019年第4期621-632,共12页
Petroleum Exploration and Development
基金
国家科技重大专项“大型油气田及煤层气开发”(2016ZX05006-005)
中国石油天然气股份有限公司重大科技专项“大港油区效益增储稳产关键技术研究与应用”(2018E-11)
关键词
古生界
原生油气藏
二次生烃
油气源
黄骅坳陷
渤海湾盆地
Paleozoic
primary oil reservoirs
secondary hydrocarbon generation
oil and gas source
Huanghua Depression
Bohai Bay Basin
