{"id":572,"date":"2022-02-10T05:47:47","date_gmt":"2022-02-09T21:47:47","guid":{"rendered":"https:\/\/www.binye-group.cn\/?p=572"},"modified":"2024-07-05T12:30:38","modified_gmt":"2024-07-05T04:30:38","slug":"%e5%8f%b6%e6%96%8c%e8%af%be%e9%a2%98%e7%bb%84%e5%9c%a8co2%e5%9c%b0%e8%b4%a8%e5%b0%81%e5%ad%98%e9%a2%86%e5%9f%9f%e7%a0%94%e7%a9%b6%e5%8f%96%e5%be%97%e9%87%8d%e8%a6%81%e7%a0%94%e7%a9%b6%e8%bf%9b","status":"publish","type":"post","link":"https:\/\/www.binye-group.cn\/en\/2022\/02\/10\/%e5%8f%b6%e6%96%8c%e8%af%be%e9%a2%98%e7%bb%84%e5%9c%a8co2%e5%9c%b0%e8%b4%a8%e5%b0%81%e5%ad%98%e9%a2%86%e5%9f%9f%e7%a0%94%e7%a9%b6%e5%8f%96%e5%be%97%e9%87%8d%e8%a6%81%e7%a0%94%e7%a9%b6%e8%bf%9b\/","title":{"rendered":"Ye Bin\u2019s Research Group Achieves Important Progress in CO\u2082 Geological Storage Research"},"content":{"rendered":"

Recently, the research group led by Assistant Professor Ye Bin from the School of Environmental Science and Engineering at Southern University of Science and Technology published a paper titled \u201cReview of natural origin, distribution, and long-term conservation of CO\u2082 in sedimentary basins of China\u201d in the top-tier Earth science journal Earth-Science Reviews. This represents another significant research achievement by the group in the field of carbon peak and carbon neutrality, and is expected to provide a reference for large-scale CO\u2082 geological storage in China.<\/p>\n

Due to the continuous rise in atmospheric CO\u2082 concentration and the resulting global warming, increasing attention has been paid to the CO\u2082 cycle. As part of the global carbon cycle, CO\u2082-rich gases exist in sedimentary basins worldwide, particularly in areas associated with deep faults or magmatic activity. Scholars around the world have conducted extensive research on CO\u2082 gas fields to verify the safety of long-term CO\u2082 storage in underground geological formations.<\/p>\n

Globally, China\u2019s sedimentary basins have the potential to store large amounts of CO\u2082. This paper analyzes different CO\u2082 fields in China to obtain detailed information on sedimentary basins. Based on this, the paper comprehensively reviews three key aspects of CO\u2082 reservoirs in Chinese sedimentary basins: the origin of CO\u2082, factors controlling CO\u2082 distribution, and the long-term effects of CO\u2082 emplacement on reservoir rocks.<\/p>\n

The sedimentary basins in eastern China are rift basins formed during the Cretaceous\u2013Paleogene period. These basins, which include five onshore and five offshore basins, frequently contain CO\u2082-rich gases (>15%), and CO\u2082 gas fields have been discovered in these rift basins.<\/p>\n

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The sedimentary basins in western China are located in thicker crust and exhibit foreland basin characteristics influenced by the India\u2013Asia orogeny. CO\u2082-rich gases (>15%) are rarely encountered in these intracontinental basins. In eastern China, the CO\u2082 content in natural gas shows a bimodal distribution: most reservoirs contain less than 10% CO\u2082, while reservoirs with CO\u2082 content exceeding 90% are also widespread. In contrast, CO\u2082 is also widely present in natural gas in western China, but generally at levels below 5%.<\/p>\n

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Carbon and helium isotopes indicate that CO\u2082 with high concentrations (>15%) in Chinese natural gas mainly originates from the mantle. Low-concentration CO\u2082 (15%) in the Yinggehai Basin.<\/p>\n

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Low \u00b3He\/\u2074He ratios indicate that intracontinental basins in western China are generally unaffected by mantle-derived gases. The low-concentration CO\u2082 in these basins is composed of organic and inorganic CO\u2082 from the crust. Some CO\u2082 gases in western China may be generated through TSR (thermochemical sulfate reduction). This type of CO\u2082 has been found in evaporite layers interbedded with carbonate rocks in the Tarim Basin and Sichuan Basin.<\/p>\n

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\u00a0<\/p>\n

CO\u2082-rich gases in Chinese rift basins are typically found in shallow areas of the Moho discontinuity and regions with Cenozoic igneous activity. CO\u2082 may migrate from igneous sources to geological reservoirs through ancient volcanic vents or open faults, or igneous intrusions may directly inject CO\u2082 into reservoirs. CO\u2082 fields in China provide examples of CO\u2082 migration and accumulation in sedimentary basins.<\/p>\n

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Faults are important pathways for CO\u2082 migration and distribution in Chinese rift basins. Long-distance horizontal migration of CO\u2082 may occur along basement faults, while small, common faults are often more important for local-scale CO\u2082 dispersion. In some rift basins, CO\u2082-rich gases are commonly found near the intersections of two faults. In the Yinggehai Basin, CO\u2082 fields are typically found in reservoirs within mud diapir structures at depths of 1,000\u20132,000 meters. Fluid data show that significant increases in CO\u2082 emissions are caused by elevated concentrations of HCO\u2083\u207b and Na\u207a, possibly because China\u2019s CO\u2082 reservoirs are mainly composed of feldspathic sandstone, followed by volcanic rocks. The dissolution of abundant aluminosilicates in volcanic rocks can greatly increase ion concentrations. Albite is the most common authigenic mineral observed in Chinese sandstone CO\u2082 reservoirs. Authigenic albite reduces reservoir porosity in a few CO\u2082 fields, but in most cases, CO\u2082 emplacement and albite growth do not appear to degrade reservoir quality. In carbonate reservoirs, CO\u2082 emplacement often increases porosity by dissolving carbonate minerals. The paper suggests that supercritical CO\u2082 can promote hydrocarbon accumulation by enhancing kerogen maturation and oil migration. However, some existing oil and gas may be displaced by later CO\u2082 emplacement, leading to the redistribution of hydrocarbons in shallow structures.<\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":575,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-572","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/posts\/572","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/comments?post=572"}],"version-history":[{"count":16,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/posts\/572\/revisions"}],"predecessor-version":[{"id":833,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/posts\/572\/revisions\/833"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/media\/575"}],"wp:attachment":[{"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/media?parent=572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/categories?post=572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.binye-group.cn\/en\/wp-json\/wp\/v2\/tags?post=572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}