现今储层剩余地层压力变化对油气纵向运移的指示意义——以渤海海域黄河口凹陷中洼油田区为例  

Significance of change of residual formation pressure on oil and gas longitudinal migration:a case study of Zhongwa oilfield area in Huanghekou Depression,Bohai Sea

作　　者：张中巧 杨海风 钱赓 赵弟江 高雁飞 ZHANG Zhongqiao;YANG Haifeng;QIAN Geng;ZHAO Dijiang;GAO Yanfei(Tianjin Branch of CNOOC Ltd.,Tianjin 300450,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300450

出　　处：《断块油气田》2025年第1期96-101,共6页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项课题“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)。

摘　　要：油气运移伴随压力的传递,如何利用地层压力数据精细分析油气优势运移一直是油气成藏研究中的难点。文中以黄河口凹陷中洼3个油田为靶区,在古近系—新近系纵向输导体系特征对比与大量实测地层压力数据分析基础上,利用油气运移伴随孔隙流体压力的传递,解析新近系成藏后地层压力变化特征与油气优势运移的关系,包括现今剩余地层压力的成因、构成与空间分布。结果表明:1)新近系储层地层压力数据分析显示,剩余地层压力的形成主要受油气运移影响;2)现今剩余地层压力绝大部分反映了现今油气传导压力,而非油藏烃柱浮力,现今剩余地层压力对输导体系油气运移能力的指示作用较好;3)黄河口凹陷新近系晚期快速成藏特点与成藏后相对稳定的构造背景,有助于实现应用现今地层压力数据精细研究油气优势运移,现今剩余地层压力值域空间分布对油气优势运移路径与主要成藏层系分析具有一定指示意义。Oil and gas migration is accompanied by pressure transfer.How to use formation pressure data to analyze oil and gas dominant migration is always a difficult problem in oil and gas accumulation research.Taking three oil fields in Zhongwa of Huanghekou Sag as the target area,based on the comparison of the characteristics of the Paleogene-Neogene longitudinal transport system and the analysis of a large number of measured formation pressure data,and using oil and gas migration accompanied by pore fluid pressure migration,this paper analyzes the relationship between the variation characteristics of formation pressure and oil and gas migration after Neogene reservoir formation,including the genesis,composition and spatial distribution of the present residual formation pressure.The results show that:(1)The analysis of Neogene reservoir pressure data shows that the formation of residual pressure is mainly influenced by oil and gas migration.(2)The current residual pressure mostly reflects the preserved oil and gas migration pressure,rather than the buoyancy of hydrocarbon column in the reservoir,and the current residual pressure is a good indicator of the oil and gas migration capacity of the transport system.(3)The rapid accumulation characteristics of the late Neogene and the relatively stable structural background after accumulation in the Huanghekou Depression are conducive to the fine study of oil and gas dominant migration by using the current formation pressure data.The spatial distribution of the current residual pressure range has certain indicative significance for the analysis of oil and gas dominant migration path and main accumulation strata.

关 键 词：实测地层压力 传导压力 烃柱浮力 油气运移路径 新近系 

分 类 号：TE122.2[石油与天然气工程—油气勘探]