川中地区寒武系龙王庙组沥青成因与油气成藏史

doi:10.7623/syxb201708002

石油学报 ›› 2017, Vol. 38 ›› Issue (8): 863-875.DOI: 10.7623/syxb201708002

川中地区寒武系龙王庙组沥青成因与油气成藏史

郝彬¹, 赵文智², 胡素云², 石书缘², 高平³, 王铜山², 黄士鹏², 姜华²

1. 中国石油勘探开发研究院西北分院甘肃兰州 730020;
2. 中国石油勘探开发研究院北京 100083;
3. 中国石油化工股份有限公司石油勘探开发研究院北京 100083

收稿日期:2016-12-28 修回日期:2017-06-02 出版日期:2017-08-25 发布日期:2017-09-02
通讯作者: 郝彬,男,1986年11月生,2009年获兰州大学学士学位,2015年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院西北分院工程师,主要从事石油地质综合研究。Email:330341000@qq.com
作者简介:郝彬,男,1986年11月生,2009年获兰州大学学士学位,2015年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院西北分院工程师,主要从事石油地质综合研究。Email:330341000@qq.com
基金资助:
国家重大科技专项（2011ZX05004-001）资助。

Bitumen genesis and hydrocarbon accumulation history of the Cambrian Longwangmiao Formation in Central Sichuan Basin

Hao Bin¹, Zhao Wenzhi², Hu Suyun², Shi Shuyuan², Gao Ping³, Wang Tongshan², Huang Shipeng², Jiang Hua²

1. Northwest Branch, PetroChina Research Institute of Petroleum Exploration and Development, Gansu Lanzhou 730020, China;
2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
3. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China

Received:2016-12-28 Revised:2017-06-02 Online:2017-08-25 Published:2017-09-02

摘要/Abstract

摘要：

运用有机岩石学、有机地球化学和扫描电镜等方法和技术，深入研究了川中地区寒武系龙王庙组中高演化沥青的成因类型、形成期次和来源；并在此基础上，结合包裹体及构造演化特征等，恢复了安岳气田龙王庙组气藏的成藏史。结果表明：1川中地区龙王庙组储层中沥青均来自于下寒武统烃源岩，沥青成因类型多样，以热裂解成因为主；2沥青的形成分为3个阶段，第1阶段为氧化水洗型沥青的形成，第2阶段为沉淀型沥青的形成，第3阶段为热裂解成因沥青的形成；3安岳气田龙王庙组气藏先后经历了5期的油气充注，包括2期液态烃的充注、晚三叠世-早侏罗世干酪根裂解气的充注、晚侏罗世-早白垩世原油裂解气的充注以及喜马拉雅期圈闭改造调整阶段干气的充注。

关键词: 沥青形态, 沥青成因, 成藏期次, 龙王庙组, 安岳气田, 川中古隆起

Abstract:

Some methods and technologies, such as organic petrology, organic geochemistry and SEM, are used to deeply study the genesis types, formation stages and sources of mid-highly evolved bitumen in the Cambrian Longwangmiao Formation, Central Sichuan Basin. In combination with the fluid inclusions and tectonic evolution characteristics, the hydrocarbon accumulation history of the Longwangmiao Formation gas reservoir is restored. The following research results are obtained:(1) The bitumen in the Longwangmiao Formation reservoirs, Central Sichuan Basin is originated from the Lower Cambrian source rocks, and has diversified geneses, dominated by pyrolysis.(2) The bitumen is formed in three stages, i.e., the formation of oxidized water-washable bitumen in the first stage, the formation of precipitated bitumen in the second stage, and the formation of pyrolysized bitumen in the third stage.(3) The Longwangmiao Formation gas reservoir in Anyue Gasfield has undergone five stages of hydrocarbon filling, including two phases of liquid hydrocarbon filling, the Late Triassic-Early Jurassic kerogen cracking gas filling, the Late Jurassic-Early Cretaceous oil-cracking gas filling and the dry gas filling in the Himalayan trap reformation and adjustment process.

Key words: bitumen shape, bitumen genesis, hydrocarbon accumulation stage, Longwangmiao Formation, Anyue gasfield, Central Sichuan paleo-uplift

中图分类号:

TE122

郝彬, 赵文智, 胡素云, 石书缘, 高平, 王铜山, 黄士鹏, 姜华. 川中地区寒武系龙王庙组沥青成因与油气成藏史[J]. 石油学报, 2017, 38(8): 863-875.

Hao Bin, Zhao Wenzhi, Hu Suyun, Shi Shuyuan, Gao Ping, Wang Tongshan, Huang Shipeng, Jiang Hua. Bitumen genesis and hydrocarbon accumulation history of the Cambrian Longwangmiao Formation in Central Sichuan Basin[J]. Acta Petrolei Sinica, 2017, 38(8): 863-875.

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川中地区寒武系龙王庙组沥青成因与油气成藏史

Bitumen genesis and hydrocarbon accumulation history of the Cambrian Longwangmiao Formation in Central Sichuan Basin

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