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首页» 过刊浏览» 2021» Vol.6» Issue(4) 539-552     DOI : 10.3969/j.issn.2096-1693.2021.04.037
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断裂调整型致密砂岩气藏成藏过程模拟与成藏模式
姜福杰,邵新荷,李林涛,庞雄奇,李敏,陈晓智,李龙龙,郑定业,呼延钰莹
1 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249 2 中国石油大学(北京)地球科学学院,北京 102249 3 中海油研究总院有限责任公司,北京 100028 4 中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡 214126 5 中国地质科学院地球物理地球化学勘查研究所,河北廊坊 065000
Accumulation process simulation and an accumulation model of a fault-adjusted tight sandstone gas reservoir
JIANG Fujie, SHAO Xinhe, LI Lintao , PANG Xiongqi, LI Min, CHEN Xiaozhi, LI Longlong, ZHENG Dingye, HUYAN Yuying
1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China 2 College of Geosciences, China University of Petroleum-Beijing, Beijing 102249, China

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摘要  基于对临兴地区致密气层分布特征剖析、储层流体包裹体特征分析 以及盆地埋藏—热演化史模拟等,恢复了盆地边缘断裂调整型致密 砂岩气的成藏过程并阐明了成藏模式。研究区天然气充注成藏分两 个阶段,在成藏早期由于断裂和裂缝不发育,天然气以源内充注为 主、近源充注为辅;到成藏中后期,伴随紫金山岩浆侵入产生大量 断层和裂缝,天然气优先沿断层和裂缝充注到近源和远源储层中, 而对源内储层的贡献相对较少。总体而言,断裂调整型致密气藏成 藏过程受断层和裂缝控制作用明显,断层起到“气泵”的作用。
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关键词 : 致密气;充注过程;成藏模式;上古生界;临兴地区
Abstract
An apparent breakthrough has been made in tight gas exploration in the edge of Ordos Basin, although tight gas  exploration started late. The typical example of tight gas at the edge of the basin is the Upper Paleozoic tight gas in the Linxing  
area on the northeast edge of Ordos Basin. However, compared with the interior of the basin, the geological conditions at the  edge of the basin are complex, and the reservoir-forming processes and the mechanism of tight gas reservoir adjustment and  transformation by faults needs to be systematically revealed. Based on the analysis of tight gas reservoir distribution charac teristics, reservoir fluid inclusion characteristics, and basin burial-thermal evolution history simulation in the Linxing area, the  reservoir-forming process of fault-adjusted tight sandstone gas at the edge of the basin is now understood, and the reservoir-form ing model is clarified. The tight gas reservoirs show differential distribution characteristics in three sets of reservoir-forming  combinations. The number of in-source reservoir-forming combinations is the least, the number of near-source reservoir-forming   combinations is in the middle, and the number of far-source reservoir-forming combinations is the most. The thickness of near source gas reservoirs is the smallest, the thickness of inner source gas reservoirs is the middle, and the thickness of far source  gas reservoirs is the largest. Fluid inclusions mainly occur in microcracks in quartz grains, and a small amount occurs in calcite   cement and quartz overgrowths. The homogenization temperature of fluid inclusions ranges from 81.7 ℃ to 180 ℃, showing the  influence of the Zijinshan magma intrusion on the thermal evolution of source rocks. There are two stages of natural gas charging   and accumulation in the study area. In the early stage of gas accumulation, faults and fractures were not developed. The natural   gas was mainly charged into the in-source reservoirs, supplemented by the near-source reservoirs. In the middle and late stages   of hydrocarbon accumulation, a large number of faults and fractures were generated with the intrusion of the Zijinshan magma.   Natural gas was preferentially charged into the near-source and far-source reservoirs along the faults and fractures caused by   the intrusion of the magma, and the contribution to the in-source reservoirs was relatively tiny. Generally speaking, the tight   gas charging at the basin edge is obviously controlled by faults and fractures, with faults playing the “gas pump.” To explore   fault-adjusted tight sandstone gas reservoirs, we should attach great importance to studying faults and fractures.


Key words: tight sandstone gas; charging process; accumulation model; Upper Paleozoic; Linxing area
收稿日期: 2021-12-29     
PACS:    
基金资助:国家重大科技专项(2016ZX05047001-006) 和国家自然科学基金项目(41872128) 联合资助
通讯作者: jiangfj@cup.edu.cn
引用本文:   
JIANG Fujie, SHAO Xinhe, LI Lintao, PANG Xiongqi, LI Min, CHEN Xiaozhi, LI Longlong, ZHENG Dingye, HUYAN Yuying. Accumulation process simulation and an accumulation model of a fault-adjusted tight sandstone gas reservoir. Petroleum Science Bulletin, 2021, 04: 539-552. doi: 10.3969/j.issn.2096-1693.2021.04.037
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