歧口凹陷滨海斜坡深凹区海探1井东营组勘探突破与启示

doi:10.3969/j.issn.1672-7703.2023.06.010

摘要/Abstract

摘要： 近年来为实现歧口凹陷“下洼找油”的构想，开辟新的增储上产战场，在渤海湾盆地歧口凹陷滨海斜坡深凹区部署海探1井并获得重大突破。基于海探1井钻探结果，对滨海斜坡深凹区东营组控砂机制、储层特征、生烃条件、油气成藏模式等进行深入研究。基于上述研究成果，证实了滨海斜坡深凹区东三段发育来自北部燕山物源区的大型重力流砂体，且储集物性较好；首次发现了东营组自生自储含油气系统，突破了以往东营组依靠断层输导成藏、下生上储的认识；构建了深凹区东三段“远源输砂、近源充注、源储耦合、连片含油”的成藏模式；同时深凹区东三段非常规页岩油也展现出广阔的资源前景。海探1井的成功钻探，为东部老区增添了新的增储战场，为“下洼找油”提供有利借鉴。

关键词: 歧口凹陷, 东营组, 海探1井, 成藏模式, 勘探突破

Abstract: In order to achieve the “oil exploration in the deep subsag” in Qikou Sag and find a new field for increasing reserves and production, Well Haitan 1 has been deployed in the deep subsag in Binhai Slope in Qikou Sag and a major breakthrough has been made. Based on the drilling results, the detailed analysis on the control mechanism of sand body development, reservoir characteristics, hydrocarbon generation conditions and hydrocarbon accumulation pattern in Dongying Formation in the deep subsag area in Binhai Slope is conducted. The study results show that: (1) The gravity flow sand body supplied by the north Yanshan provenance was developed in the third member of Dongying Formation (Dong 3 member) in the deep subsag area in Binhai Slope, showing good reservoir physical property; (2) The self-generation and self-storage oil and gas bearing system was discovered in Dong 3 member for the first time, breaking through the previous understanding of hydrocarbon migration through faults and “lower source rock and upper reservoir”; (3) The hydrocarbon accumulation pattern of “long distance sand transportation, near source hydrocarbon charging, coupling of source rock and reservoir, and contiguous oil bearing” in Dong 3 member in the deep subsag area has been established; (4) In addition, shale oil in Dong 3 member in the deep subsag area shows huge resource potential. The successful drilling of Well Haitan 1 supports to find a new field in the eastern mature oilfields and provides favorable reference for “oil exploration in the deep subsag”.

中图分类号:

TE121

周立宏, 何海清, 陈长伟, 李长海, 石倩茹, 董越崎, 崔宇, 张佼杨, 朱华汇, 张明振. 歧口凹陷滨海斜坡深凹区海探1井东营组勘探突破与启示[J]. 中国石油勘探, 2023, 28(6): 78-89.

Zhou Lihong, He Haiqing, Chen Changwei, Li Changhai, Shi Qianru, Dong Yueqi, Cui Yu, Zhang Jiaoyang, Zhu Huahui, Zhang Mingzhen. Exploration breakthrough and enlightenment of Dongying Formation in Well Haitan 1 in the deep subsag area in Binhai Slope, Qikou Sag[J]. China Petroleum Exploration, 2023, 28(6): 78-89.

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