深层碳酸盐储层再平衡流体包裹体特征及其原始捕获条件确定

陈勇; 韩雨航; 鲁雪松; 宋一帆; 马行陟; 范俊佳

doi:10.3799/dqkx.2022.353

Volume 48 Issue 2

Feb. 2023

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Article Navigation > Earth Science > 2023 > 48(2): 413-428

Chen Yong, Han Yuhang, Lu Xuesong, Song Yifan, Ma Xingzhi, Fan Junjia, 2023. The Characteristics of Re⁃Equilibrated Fluid Inclusions in Deep Carbonate Reservoirs and Determination of Their Original Trapping Conditions. Earth Science, 48(2): 413-428. doi: 10.3799/dqkx.2022.353

Citation:

Chen Yong, Han Yuhang, Lu Xuesong, Song Yifan, Ma Xingzhi, Fan Junjia, 2023. The Characteristics of Re⁃Equilibrated Fluid Inclusions in Deep Carbonate Reservoirs and Determination of Their Original Trapping Conditions. Earth Science, 48(2): 413-428. doi: 10.3799/dqkx.2022.353

Citation:

Chen Yong, Han Yuhang, Lu Xuesong, Song Yifan, Ma Xingzhi, Fan Junjia, 2023. The Characteristics of Re⁃Equilibrated Fluid Inclusions in Deep Carbonate Reservoirs and Determination of Their Original Trapping Conditions. Earth Science, 48(2): 413-428. doi: 10.3799/dqkx.2022.353

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The Characteristics of Re⁃Equilibrated Fluid Inclusions in Deep Carbonate Reservoirs and Determination of Their Original Trapping Conditions

doi: 10.3799/dqkx.2022.353

1.
School of Geosciences, China University of Petroleum, Qingdao 266580, China
2.
PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Received Date: 2022-12-19
Publish Date: 2023-02-25

Abstract

Abstract

Complex geological evolution often leads to re⁃equilibration of fluid inclusions in deep carbonate reservoirs, and correctly identifying re⁃equilibration is of great significance to accurately explain paleo⁃fluid evolution.In this paper, taking the dolostone reservoir of Sinian Dengying Formation in Anyue gas field in Sichuan Basin, China as an example, the characteristics and types of re⁃equilibration are identified by petrography, Raman spectroscopy and micro⁃thermometry combined with the history of tectonic evolution, and original trapping conditions of each stage fluid inclusions are determined by PVT simulation based on the maxima or minima homogenization temperature of re⁃equilibrated fluid inclusions. The results show that fluid inclusions indolomi tes at stage Ⅱ, Ⅲ and Ⅳ are deformed by decrepitation, and fluid inclusions in calcite at stage Ⅴ are stretched, while re⁃equilibration characteristics of fluid inclusions in quartz at stage Ⅳ are not obvious. Re⁃equilibration of fluid inclusions in dolomites at stage Ⅱ and Ⅲ are in the process of burying and temperature increasing, while re⁃equilibration of fluid inclusions in dolomites at stage Ⅳ and in calcite at stage Ⅴ are in the process of uplift and temperature reducing.The trapping pressure and trapping temperature of fluid inclusions increase from stage Ⅱ to stage Ⅳ, reaching the peak of temperature and pressure at stage Ⅳ, while the trapping pressure and trapping temperature of fluid inclusions in calcite at stage Ⅴ are lower than those at stage Ⅳ. Combining trapping conditions and burial history can accurately determine the formation age of minerals at different diagenetic sequence, and the results can be compared with data from isotopic dating.
- re⁃equilibrated fluid inclusion,
- paleo⁃pressure,
- deep carbonate reservoir,
- dolostone,
- Sichuan Basin,
- petroleum geology

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References(55)

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The Characteristics of Re⁃Equilibrated Fluid Inclusions in Deep Carbonate Reservoirs and Determination of Their Original Trapping Conditions

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