摘要
地层超压的形成和演化是油气成藏时期研究的重要组成部分。惠州26洼是珠江口盆地的典型富生烃洼陷,为揭示该洼陷超压成因及演化特征,通过实测压力、测井响应特征、流体包裹体热动力模拟、盆地模拟技术,探究地层压力分布、超压成因,并对压力演化进行重建。结果表明:惠州26洼现今超压主要发育于文昌组,超压层段测井响应特征指示超压成因以生烃增压为主;文昌组在16 Ma左右开始发育超压,10 Ma至今地层压力快速增加,现今压力系数为1.4~1.8。超压的形成和演化为深层致密油气成藏和浅层高效长距离运移提供了有利的动力条件。
The genesis and evolution of formation overpressure are vital components of oil and gas reservoir forming condition studies.Huizhou 26 Sag is a typical hydrocarbon-rich sag in Pearl River Mouth Basin.In order to reveal the genesis and evolution characteristics of the overpressure in this sag,the formation pressure distribution,overpressure genesis and pressure evolution were reconstructed through measured pressure,logging response characteristics,fluid inclusion thermodynamic simulation and basin modelling technology.The results show that the current overpressure in Huizhou 26 Sag mainly develops in Wenchang Formation,and the logging response characteristics of the overpressure interval indicate that the genesis of the overpressure is dominated by hydrocarbon generation pressurization.Wenchang Formation began to develop overpressure around 16 Ma,and the formation pressure had rapidly increased since 10 Ma,with the current pressure coefficient reaching 1.4-1.8.The genesis and evolution of overpressure provide favorable dynamic conditions for the formation of deep tight oil and gas reservoirs and the efficient long-distance migration in shallow layers.
作者
杨兴业
龙祖烈
张小龙
熊万林
王文勇
何莹
YANG Xingye;LONG Zulie;ZHANG Xiaolong;XIONG Wanlin;WANG Wenyong;HE Ying(Shenzhen Branch of CNOOC Ltd.,Shenzhen 518054,China)
出处
《断块油气田》
北大核心
2025年第3期432-438,共7页
Fault-Block Oil & Gas Field
基金
中国海洋石油集团有限公司“十四五”重大科技项目“海上深层超深层油气勘探技术”(KJGG2022-0403)。
关键词
地层超压
超压成因
油气运移
珠江口盆地
formation overpressure
overpressure genesis oil-gas migration
Pearl River Mouth Basin
作者简介
第一作者:杨兴业,男,1987年生,博士,主要从事油气地质与地球化学研究。Email:yangxy34@cnooc.com.cn。
