石油与天然气地质 ›› 2023, Vol. 44 ›› Issue (5): 1159-1172.doi: 10.11743/ogg20230507
王永诗1(), 巩建强2, 陈冬霞3, 邱贻博2, 茆书巍2, 雷文智3, 杨怀宇2, 王翘楚3
收稿日期:
2023-04-03
修回日期:
2023-07-28
出版日期:
2023-10-19
发布日期:
2023-10-19
第一作者简介:
王永诗(1964—),男,博士、教授级高级工程师,石油地质研究与油气勘探管理。E-mail: 基金项目:
Yongshi WANG1(), Jianqiang GONG2, Dongxia CHEN3, Yibo QIU2, Shuwei MAO2, Wenzhi LEI3, Huaiyu YANG2, Qiaochu WANG3
Received:
2023-04-03
Revised:
2023-07-28
Online:
2023-10-19
Published:
2023-10-19
摘要:
渤海湾盆地东营凹陷北部陡坡带盐家地区深层油气藏经历了复杂的热演化过程,使得深层油气相态类型多变,影响着深层油气勘探开发。通过盆地模拟、pVT相态模拟和烃类流体包裹体等综合分析,揭示了盐家地区深层油气相态演化过程,建立了不同类型油气成藏模式。研究表明,东营北带盐家地区古近系沙河街组四段深层油气多种相态垂向有序分布,从浅至深依次发育轻质油、凝析气和干气等多类型油气藏。深层砂砾岩体中油气相态主要受到热演化的控制,而干酪根生烃、原油裂解和外部天然气充注主导了凝析气藏的相态演化过程。基于盐家地区深层砂砾岩体不同类型油气藏的油气相态、储层特征和温压演化史,建立了盐家深层“多期生油气,扇中叠置输导-扇根封堵,多相态有序分布”的砂砾岩油气成藏模式,为陆相断陷盆地深层油气的高效勘探提供理论指导。
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