黄骅坳陷上古生界烃源灶排烃特征及供烃模式  

Hydrocarbon expulsion characteristics and hydrocarbon supply model of the upper Paleozoic source kitchen in Huanghua depression

作　　者：杨润泽 赵贤正[2] 李宏军[2] 赵长毅[1] 蒲秀刚[2] 刘海涛[1] 付立新[2] 李传明 YANG Runze;ZHAO Xianzheng;LI Hongjun;ZHAO Changyi;PU Xiugang;LIU Haitao;FU Lixin;LI Chuanming(Research Institute of Petroleum Exploration and Development,Beijing 100083,China;PetroChina Dagang Oilfield Company,Tianjin 300280,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大港油田公司,天津300280 [3]中国矿业大学地球科学与测绘工程学院,北京100083

出　　处：《中国矿业大学学报》2020年第2期367-380,共14页Journal of China University of Mining & Technology

基　　金：中国石油天然气股份有限公司重大科技专项(2018E-11-02,2019D-0706)。

摘　　要：受多期构造活动影响,黄骅坳陷上古生界烃源灶排烃特征及供烃模式不明,制约了该地区的油气勘探.针对存在的问题,基于录井、测井资料,运用岩心观察、地球化学分析及典型油气藏剖面解析等多种手段,结合烃源岩埋藏史和热史,明确了烃源岩排烃特征、烃源灶演化及供烃模式.认为烃源灶由早期"单灶为主"演化到后期南北部"双灶供烃",两期排烃使油气在空间上广泛分布,存在3种源-藏组合.研究结果表明:1)煤、炭质泥岩和泥岩的排烃门限深度分别是2000 m(Ro为0.68%),2100 m(Ro为0.70%)和2150 m(Ro为0.72%);3种烃源岩达到排烃门限后均会经历一段快速排烃的过程,之后排烃速率持续下降;泥岩的排烃效率低于炭质泥岩和煤.2)侏罗纪末和白垩纪末黄骅南部最大排烃强度(21.00×10^8 m^3和22.77×10^8 m^3)远大于黄骅北部(2.96×10^8 m^3),古近纪末北部最大排烃强度(58.09×10^8 m^3)与南部(78.26×10^8 m^3)差距减小,现今南北部基本一致(98×10^8 m^3和89×10^8 m^3).3)天然气成因判别和油源对比证实煤系源岩供气层位分布于奥陶系、二叠系、中生界和古近系,原油聚集于奥陶系、二叠系和中生界;存在"源下"、"源内"和"源上"油气藏,对应不同的供烃模式,源内岩性油气藏为勘探潜在目标.Affected by multi-stage tectonic activities,the hydrocarbon expulsion characteristics and hydrocarbon supply models of upper Paleozoic hydrocarbon source kitchen in Huanghua depression are unclear,which restricts the oil and gas exploration in this area.To solve these problems,based on logging analysis and burial-thermal history of source rocks,by means of core observation,geochemical testing and profile analysis of typical reservoirs,the characteristics of hydrocarbon expulsion,evolution of source kitchen and hydrocarbon supply models were clarified.It can be concluded that the upper Paleozoic source kitchen is shown to evolve from a single source kitchen to a dual source kitchen to supply hydrocarbon.And two-stage hydrocarbon expulsion events make the oil and gas widely distributed.There are three types of source-reservoir matching relationships,potential exploration target is pointed out.Results showed that:1)The threshold of coal,carbonaceous mudstone and mudstone is 2000,2100 and 2150 m,respectively,with corresponding Ro value of 0.68%,0.70%and 0.72%,respectively.When the threshold is reached,the source rock will experience a rapid process of hydrocarbon expulsion,after which the rate of hydrocarbon expulsion will continue to decline.The hydrocarbon expulsion efficiency of the mudstone is lower than that of carbonaceous mudstone and mudstone.2)The maximum hydrocarbon expulsion intensity in southern Huanghua(21.00×10^8 and 22.77×10^8 m^3)was much higher than that in northern Huanghua(2.96×10^8 m^3)at the end of Jurassic and Cretaceous.At the end of the Paleogene,the difference of hydrocarbon expulsion intensity between the northern area(58.09×10^8 m^3)and southern area(78.26×10^8 m^3)decreased;To date,the hydrocarbon expulsion intensity in the north and south is basically the same(98×10^8 and 89×10^8 m^3).3)The discrimination of natural gas genesis and oil-source correlation confirmed that the gas generated from coal measure was distributed in Ordovician,Permian,Mesozoic and Paleogene,and the crude oil

关 键 词：煤系烃源岩 排烃模式 排烃强度 烃源灶 供烃模式 黄骅坳陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]