“三元耦合”控藏机制与勘探有利区分析——以渤海湾盆地歧口凹陷古近系岩性地层油气藏为例

MECHANISM OF TERNARY FACTORS COUPLING FOR CONTROLLING RESERVOIR AND ANALYSIS OF BENEFICIAL EXPLORATION AREAS——AN EXAMPLE OF THE EOGENE STRATIGRAPHIC RESERVOIR OF QIKOU SAG IN HUANGHUA DEPRESSION OF THE BOHAI BAY BASIN

蒲秀刚 柳飒 周建生 周立宏 廖前进 王振升 肖敦清 查明 杨志彬

Pu Xiugang Liu Sa Zhou Jiansheng Zhou Lihong Liao Qianjin Wang Zhensheng Xiao Dunqing Zha Ming Yang Zhibin

中国石油大港油田分公司, 天津 300280 2. 中国石油大学(华东), 山东, 东营 257061

Dagang Oilfield Company, PetroChina, Tianjin 300280, China 2. China Petroleum University, Dongying, Shandong 257061, China

应用单因素叠合分析的思路,在构造-砂体-成藏综合研究基础上,认识到"三元耦合"控藏本质,研判出渤海湾黄骅坳陷歧口凹陷古近系岩性地层油气藏的勘探有利区.研究表明,歧口富油气凹陷岩性地层油气藏控藏主因素可以概括为3个端元,一是油源,包括生排烃和其输导体系;二是储集层物性,包括孔渗性能和孔隙结构特征;三是圈闭是否有效以及圈闭闭合幅度多高.可用"三元耦合"控藏新模式来表达油气成藏的本质,决定其圈闭发育的主要因素是古构造背景与沉积物源体系的匹配.板桥-滨海断鼻、滨海斜坡区与埕北断坡区等是歧口凹陷古近系最有利的大型勘探战场.

Applying the method of single factor analysis on the basis of comprehensive evaluation with structure,sandstone,and the model of hydrocarbon accumulation,the mechanism of ternary factors coupling for controlling reservoir has been understood,and beneficial exploration areas for Paleogene stratigraphic reservoir of Qikou Sag in Huanghua Depression of the Bohai Bay Basin were revealed.It indicated that the major controlling factors of forming reservoir could fall into three categories: first was oil source including hydrocarbon-generating,expulsion and transportation system;the second was physical property of reservoir including properties of porosity,permeability and characteristics of pore structure;the third was whether the trap was effective or not(storage oil or not)and the closing height of trap(deciding the output proportion of oil and water).The major factor of deciding distribution of traps were whether paleo structural setting was matched with depositional systerms.New patterns of "Ternary Factors Coupling" controlling reservoir-forming can be used to express the essence of pool-forming.There are large scale beneficial exploration areas for Paleogene stratigraphic reservoir in Qikou Sag such as Banqiao-Binhai faulted-nose,Binhai slope area and Chengbei fault ramp.

中国石油大港油田公司博士后科技创新基金项目(DGKT2004-07)

https://doi.org/10.11781/sysydz200806575