Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/04151917422 |
Effects of natural gas acidic components on local porosity generation in a carbonate reservoir: Insights from reactive transport modeling | |
Zhang, Guanru1,2,3; Lu, Peng4; Luo, Pan5; Sonnenthal, Eric6; Huang, Yi3; Zhu, Chen2 | |
2019-12-01 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2019 |
卷号 | 103期号:12页码:2975-3001 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Saudi Arabia |
英文摘要 | To investigate the mechanism of local porosity modification in a carbonate reservoir caused by the acidic components associated with natural gas generation, a numerical model for the charging of natural gas rich in acidic components (CO2) was developed. The acidic components are originated from maturation of organic matter in the source rock. The model includes coupled gas-water-rock interactions, multiphase flow, and spatial heterogeneities of the geochemical reactions. The simulation results indicate the following. (1) When regional groundwater travels through the gas- water contact (GWC), it is acidified by the CO2(g) in the gas zone and will dissolve carbonate minerals to form local secondary porosity. The generated local secondary porosity is approximately 0.04 (volume fraction), with a maximum value of approximately 0.27, and is located mainly in the vicinity of the GWC. (2) Under reservoir conditions, the solubility of calcite is much higher than dolomite. The higher solubility and common ion effect of Ca results in calcite being the primary reactive mineral in pure carbonate reservoirs (having both calcite and dolomite). The presence of anhydrite in the system does not change this situation. (3) The groundwater flow field causes GWC evolution to be S-shaped. The inflection and gentle-sloping parts at both ends of the GWC have different angles with the groundwater stream lines, resulting in different amounts of mineral dissolution and precipitation and porosity increase. (4) The limited amount of CO2 from the source rock and groundwater flow in the subsurface seems to be sufficient to support local secondary porosity generation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000503033000007 |
WOS关键词 | SECONDARY POROSITY ; MESOGENETIC DISSOLUTION ; GEOTHERMAL CONVECTION ; SONGLIAO-BASIN ; CO2 INJECTION ; ORGANIC-ACIDS ; ROCK ; DIAGENESIS ; MIGRATION ; CREATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/224024 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Zhejiang Univ, Sch Earth Sci, Hangzhou, Zhejiang, Peoples R China; 2.Indiana Univ, Dept Earth & Atmospher Sci, Bloomington, IN 47405 USA; 3.Chengdu Univ Technol, Coll Ecol & Environm, Chengdu, Sichuan, Peoples R China; 4.Adv Res Ctr, Explorat & Petr Engn Ctr EXPEC, Dhahran, Saudi Arabia; 5.EXPEC Adv Res Ctr, Dhahran, Saudi Arabia; 6.Lawrence Berkeley Natl Lab, Berkeley, CA USA |
推荐引用方式 GB/T 7714 | Zhang, Guanru,Lu, Peng,Luo, Pan,et al. Effects of natural gas acidic components on local porosity generation in a carbonate reservoir: Insights from reactive transport modeling[J]. AAPG BULLETIN,2019,103(12):2975-3001. |
APA | Zhang, Guanru,Lu, Peng,Luo, Pan,Sonnenthal, Eric,Huang, Yi,&Zhu, Chen.(2019).Effects of natural gas acidic components on local porosity generation in a carbonate reservoir: Insights from reactive transport modeling.AAPG BULLETIN,103(12),2975-3001. |
MLA | Zhang, Guanru,et al."Effects of natural gas acidic components on local porosity generation in a carbonate reservoir: Insights from reactive transport modeling".AAPG BULLETIN 103.12(2019):2975-3001. |
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