石油与天然气地质 ›› 2024, Vol. 45 ›› Issue (1): 281-292.doi: 10.11743/ogg20240119
张宏国1(), 杨海风1, 宿雯1, 徐春强1, 黄志1, 程燕君2
收稿日期:
2023-09-03
修回日期:
2023-12-10
出版日期:
2024-02-01
发布日期:
2024-02-29
第一作者简介:
张宏国(1986—)男,高级工程师,油气运聚与渤海油气勘探。E‑mail: zhanghg2@cnooc.com.cn。
基金项目:
Hongguo ZHANG1(), Haifeng YANG1, Wen SU1, Chunqiang XU1, Zhi HUANG1, Yanjun CHENG2
Received:
2023-09-03
Revised:
2023-12-10
Online:
2024-02-01
Published:
2024-02-29
摘要:
油气运聚是源外层系规模性成藏的关键之一。利用渤海湾盆地渤中地区丰富的三维地震和钻井数据分析,从断裂带深层垂向输导、馆陶组二次汇聚及明化镇组下段(明下段)侧向分流3个主要运聚环节分析入手,对明下段砂体烃柱高度进行分析。研究认为,烃源超压-断层活动耦合作用是断裂带垂向输导的关键,在烃源充足条件下断裂带分形维数大于0.7时,油气垂向输导能力较强;富砂型层系形成的早期油藏控制油气二次汇聚能力,利用馆陶组圈闭面积和有效幅度等计算汇聚系数,当馆陶组汇聚系数大于700 km3时,对应明下段具备发育大、中型油田的基础;断层的泄压控制浅层砂体侧向分流环节,利用砂体高部位和低部位断-砂接触面积计算泄压系数,当明下段砂体泄压系数大于2.0时,砂体烃柱高度可超过30 m。3个主要运聚环节紧密配合,是富生烃凹陷源外层系高丰度油藏形成的必要条件。
中图分类号:
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摘要 |
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