石油与天然气地质 ›› 2021, Vol. 42 ›› Issue (1): 212-223.doi: 10.11743/ogg20210118

• 油气开发 • 上一篇    下一篇

四川盆地东部复兴地区侏罗系自流井组东岳庙段陆相页岩凝析气藏地质特征及勘探开发前景

舒志国(), 周林, 李雄, 刘皓天, 曾勇, 谢洪光, 姚明君, 王艳春   

  1. 中国石化 江汉油田分公司 勘探开发研究院, 湖北 武汉 430070
  • 收稿日期:2020-07-01 出版日期:2021-02-28 发布日期:2021-02-07
  • 作者简介:舒志国(1966-), 男, 博士、研究员, 石油地质综合。E-mail: trqszg@sina.cn
  • 基金资助:
    国家科技重大专项(2017ZX05036003-008);中国石油化工股份有限公司技术开发项目(P19017-2)

Geological characteristics of gas condensate reservoirs and their exploration and development prospect in the Jurassic continental shale of the Dongyuemiao Member of Ziliujing Formation, Fuxing area, eastern Sichuan Basin

Zhiguo Shu(), Lin Zhou, Xiong Li, Haotian Liu, Yong Zeng, Hongguang Xie, Mingjun Yao, Yanchun Wang   

  1. Exploration and Production Research Institute of Jianghan Oilfield Company, SINOPEC, Wuhan, Hubei 430070, China
  • Received:2020-07-01 Online:2021-02-28 Published:2021-02-07

摘要:

日前,中国石化江汉油田分公司在川东复兴地区部署实施的涪页10HF井测试日产气5.58×104 m3,日产油17.6m3,取得了该区东岳庙段陆相页岩气勘探的重大突破。为了有效指导该区陆相页岩气的勘探开发,同时为四川盆地和国内外其他地区陆相页岩油气的勘探开发提供参考,基于岩心、钻井、测录井和分析化验资料的综合分析,对复兴地区东岳庙段陆相页岩凝析气藏的地质特征进行了研究,结合页岩品质、资源规模、保存条件、地表条件、压裂改造以及试气试采技术等方面分析了复兴地区东岳庙段陆相页岩气的勘探开发前景。综合研究认为:东岳庙段陆相页岩原生品质好,资源规模大,具有形成大型页岩气藏的物质基础;复兴地区为低山和丘陵地貌,东岳庙段埋深适中、地层平缓且断裂不发育,具备开展大规模页岩气开发的有利条件;东岳庙段粘土矿物含量高和可压性较差,“高密布缝体积改造”的压裂工艺技术已基本实现对东岳庙段陆相页岩的有效改造;东岳庙段为高压力系数的页岩凝析气藏,油、气产出规律不清,合理高效的开发方式仍需要持续开展探索。

关键词: 开发前景, 涪页10HF井, 东岳庙段, 自流井组, 凝析气藏, 陆相页岩, 侏罗系, 复兴地区, 四川盆地

Abstract:

Gas condensate reservoirs were recently discovered by Sinopec Jianghan Oilfield Company through Well Fuye10HF in the continental shale of the Dongyuemiao Member, Fuxing area, eastern Sichuan Basin.The well was tested with a daily gas rate of 55 800 cubic meters and liquid rate of 17.6 cubic meters, indicating a great breakthrough made in shale gas exploration in the area.An integrated analysis of core, drilling, logging and testing data was then combined with an assessment of rock quality, resource potential, preservation and surface conditions to characterize the reservoirs in terms of geology and development prospect.Applicable fracturing and production technologies to the reservoirs were also reviewed to provide a reference for the exploration and development of other shale reservoirs of similar geological context.The results show that the shale of high quality and extensive distribution in the member is physically sufficient for the generation of large-scale gas reservoirs.The member, conveniently buried in a moderate depth with gentle strata and undeveloped faults in the low-relief Fuxing area, is relatively friendly to a large-scale gas development.Despite a high clay mineral content and poor fracturability, the member responds sensitively to fracturing treatment featuring a "dense-fracture volume stimulation".The results also suggest that the reservoirs are of high pressure coefficient and produce in a way that requires further studies to formulate a suitable and efficient development scheme.

Key words: Development prospect, Well Fuye 10HF, Dongyuemiao Member, Ziliujing Formation, gas condensate reservoir, continental shale, Jurassic, Fuxing area, Sichuan Basin

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