青海平安地区CO_2气藏成藏模式研究
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摘要
地质安全性评定是碳储工程开展的重要依据,研究天然CO_2气藏成藏模式可以从反向思维上论证深部咸水层碳储工程的可行性。对其泄漏的监测工作可以作为突发状态下碳储工程地质安全性评定的一种论证。以青海平安地区天然CO_2气藏为研究对象,采用CO_2捕集、利用与储存(CCUS)的理念,对其气藏的成因、运移和成藏模式进行分析。研究结果显示:青海平安地区天然CO_2气体属无机壳源成因,由高含CO_2气体间歇性高压自喷井(ZK10)首次揭露了青海东部白垩系地层中CO_2气水混合层,区内晚白垩纪民和组和古近纪系西宁群2套地层为理想的CO_2地质储存储层。区内断裂及之间相互沟通关联的次级断裂构成了CO_2气藏的疏导网络,断裂相交的位置更是高纯度CO_2气藏发育的有利区,也是本区域最有利于以后碳储工程开展的深度范围。
Geological safety assessment is an important basis for the development of carbon storage engineering.To research the reservoir model of natural CO_2 gas can demonstrate the feasibility of carbon storage project built in the deep salt water layer.The monitoring of CO_2 leakage can be used as a demonstration for the geological safety evaluation of the carbon storage under emergency.Through using the carbon dioxide(CO_2)capture,utilization and storage(CCUS)concept,the formation,migration and accumulation model of CO_2 gas reservoir in Ping'an region of Qinghai province have been analyzed in this paper.Results show that:1the natural CO_2 gas in this region is inorganic gases.2the high content of CO_2 gas from the intermittent high pressure flowing wells(ZK10)reveals that the mixed layer of CO_2 gas and water is contained in the cretaceous strata in eastern Qinghai.3 Minhe and Xining Groups are two sets ideal strata to storageCO_2 gas.The channel network of CO_2 gas reservoir is connected each other by secondary fracture,and the location of fracture intersection is a good development area for highly purified of mantle-derived CO_2 gas,which is also the most beneficial region of carbon storage projects in the future.
Geological safety assessment is an important basis for the development of carbon storage engineering.To research the reservoir model of natural CO_2 gas can demonstrate the feasibility of carbon storage project built in the deep salt water layer.The monitoring of CO_2 leakage can be used as a demonstration for the geological safety evaluation of the carbon storage under emergency.Through using the carbon dioxide(CO_2)capture,utilization and storage(CCUS)concept,the formation,migration and accumulation model of CO_2 gas reservoir in Ping'an region of Qinghai province have been analyzed in this paper.Results show that:1the natural CO_2 gas in this region is inorganic gases.2the high content of CO_2 gas from the intermittent high pressure flowing wells(ZK10)reveals that the mixed layer of CO_2 gas and water is contained in the cretaceous strata in eastern Qinghai.3 Minhe and Xining Groups are two sets ideal strata to storageCO_2 gas.The channel network of CO_2 gas reservoir is connected each other by secondary fracture,and the location of fracture intersection is a good development area for highly purified of mantle-derived CO_2 gas,which is also the most beneficial region of carbon storage projects in the future.
引文
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唐忠驭.广东三水盆地CO2气藏地质特征及成因探讨[J].石油实验地质,1980,3(4):10-18.TANG Zhongyu.Discussion CO2 gas reservoir geological characteristics and causes Sanshui Basin[J].Petroleum Geology and Experiment,1980,3(4):10-18.
石维栋,张森琦.西宁盆地北西缘地下热水分布特征[J].中国地质,2006,33(5):1131-1136.SHI Weidong,ZHANG Senqi.Distribution characteristics of geothermal water on the northwestern margin of the Xining basin[J].Geology in China,2006,33(5):1131-1136.
戴金星.天然气碳氢同位素特征和各类天然气鉴别[J].天然气地球科学,1993,4(2-3):1-40.DAI Jinxing.Hydrocarbon isotopic characteristics of natural gas and the identification of various types of natural gas[J].Natural Gas Geoscience,1993,4(2-3):1-40.
张森琦,徐伟林,石维栋,等.西宁盆地地热地质[M].北京:地质出版社,2013.ZHANG Senqi,XU Weilin,Shi Weidong,et al.Xining basin geothermal geology[M].Beijing:Geological Publishing House,2013.
郭森,马致远,李劲彬,等.我国地热供暖的现状及展望[J].西北地质,2015,(4):204-209.GUO Sen,MA Zhiyuan,LI Jinbin,et al.Status and Prospects of Geothermal Heating in China[J].Northwestern Geology,2015,(4):204-209.
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