石油学报 ›› 2022, Vol. 43 ›› Issue (1): 29-40.DOI: 10.7623/syxb202201003

• 地质勘探 • 上一篇    下一篇

塔里木盆地顺托果勒北部地区超深层现今地温场特征

吴鲜1, 李丹2,3, 韩俊1, 朱秀香1, 黄诚1, 曹自成1, 常健2,3, 刘雨晨2,3   

  1. 1. 中国石油化工股份有限公司西北油田分公司勘探开发研究院 新疆乌鲁木齐 830011;
    2. 中国石油大学(北京)油气资源与勘探国家重点实验室 北京 102249;
    3. 中国石油大学(北京)地球科学学院 北京 102249
  • 收稿日期:2020-06-24 修回日期:2021-08-27 出版日期:2022-01-25 发布日期:2022-02-10
  • 通讯作者: 李丹,女,1994年10月生,2017年获成都理工大学学士学位,现为中国石油大学(北京)博士研究生,主要从事区域构造及盆地分析。Email:lidan941009@163.com
  • 作者简介:吴鲜,男,1982年6月生,2012年获西南石油大学硕士学位,现为中国石油化工股份有限公司西北油田分公司勘探开发研究院高级工程师,主要从事油气勘探工作。Email:182363258@qq.com
  • 基金资助:
    国家科技重大专项(2017ZX05005-002-001)资助。

Characteristics of present ultra-deep geothermal field in the northern Shuntuoguole low uplift, Tarim Basin

Wu Xian1, Li Dan2,3, Han Jun1, Zhu Xiuxiang1, Huang Cheng1, Cao Zicheng1, Chang Jian2,3, Liu Yuchen2,3   

  1. 1. Exploration and Production Research Institute, Sinopec Northwest Oil Field Company, Xinjiang Urumqi 830011, China;
    2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
    3. College of Geosciences, China University of Petroleum, Beijing 102249, China
  • Received:2020-06-24 Revised:2021-08-27 Online:2022-01-25 Published:2022-02-10

摘要: 塔里木盆地顺托果勒低隆起北部(顺北地区)发育超深层轻质油藏,这与传统生烃理论认识相矛盾。为了更合理地解释顺北地区超深层油气相态的分布规律,对研究区现今温度场及油气地球化学特征开展了系统研究。顺北地区现今大地热流为32.2~42.1 mW/m2,不同埋深的同一地层温度表现出与大地热流相似的平面分布模式,由北向南逐渐增大。埋深为9 km和10 km的地层温度分别为154~208℃和164~226℃。顺北地区下寒武统玉尔吐斯组烃源岩现今温度为168~248℃,中奥陶统一间房组储层温度为128~178℃,烃源岩的地层温度与气油比和原油成熟度具正相关性,与原油密度和黏度呈负相关性。顺北地区深部地层温度场受控于岩石热导率与岩石圈热结构,而温度场最终控制了油气在储层中的相态展布特征。自北向南,顺北地区深部温度场逐渐增大,依次与发育的轻质油藏、挥发性油藏、凝析气藏和干气藏相匹配,该研究认识对超深层油气勘探与资源评价具有指导意义。

关键词: 油气地球化学特征, 地温场, 超深层, 顺托果勒低隆起, 塔里木盆地

Abstract: Ultra-deep light oil reservoirs are developed in the northern Shuntuoguole low uplift, Tarim Basin, which is in contradiction with the traditional theory of hydrocarbon generation. To explain the distribution law of ultra-deep hydrocarbon phase states in the northern part of Shuntuoguole in a more reasonable way, a systematic study is carried out on the geochemical characteristics of the present temperature field as well as oil and gas in the study area. In the northern Shuntuoguole low uplift, the current terrestrial heat flow is 32.2~42.1 mW/m2, and the temperature of the same formation at different buried depths presents a distribution pattern similar to terrestrial heat flow, gradually increasing from north to south. The formation temperature with the buried depth of 9 km and 10 km is 154~208℃ and 164~226℃, respectively. In addition, the present temperature of the Lower Cambrian source rock is 168~248℃, while the temperature of Yijianfang Formation reservoirs is 128~178℃. The formation temperature of source rock is positively correlated with gas-oil ratio and crude oil maturity, while negatively correlated with crude oil density and viscosity. The deep formation temperature field in the northern Shuntuoguole low uplift is controlled by the thermal conductivity of rocks and the deep hydrothermal upwellings in the southern Shuntuoguole low uplift, while the temperature field finally controls the distribution characteristics of the hydrocarbon phase states in reservoirs. In the northern Shuntuoguole low uplift, the deep temperature field gradually enlarges from north to south and successively corresponds to the development of light oil, volatile oil, condensate gas and dry gas reservoir. Therefore, this study is of great guiding significance for ultra-deep oil-gas exploration and resource evaluation.

Key words: geochemical characteristics of oil and gas, geothermal field, ultra-deep layers, Shuntuoguole low uplift, Tarim Basin

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