{"id":62004,"date":"2023-11-22T06:00:14","date_gmt":"2023-11-21T22:00:14","guid":{"rendered":"http:\/\/learncmg.cn\/?p=62004"},"modified":"2023-11-22T06:00:14","modified_gmt":"2023-11-21T22:00:14","slug":"333-%e5%8d%97%e9%9d%9ebredasdorp%e7%9b%86%e5%9c%b0%e6%b2%b9%e8%97%8f%e4%ba%8c%e6%b0%a7%e5%8c%96%e7%a2%b3%e5%9c%b0%e8%b4%a8%e5%b0%81%e5%ad%98%e7%9a%84%e5%8a%a8%e6%80%81%e6%a8%a1%e6%8b%9f","status":"publish","type":"post","link":"http:\/\/learncmg.cn\/?p=62004","title":{"rendered":"333. \u5357\u975eBredasdorp\u76c6\u5730\u6cb9\u85cf\u4e8c\u6c27\u5316\u78b3\u5730\u8d28\u5c01\u5b58\u7684\u52a8\u6001\u6a21\u62df"},"content":{"rendered":"

Dynamic modeling of geological carbon storage in an oil reservoir, Bredasdorp Basin, South Africa<\/a><\/strong><\/h3>\n

\u5730\u8d28\u78b3\u50a8\u5b58\u662f\u4e00\u79cd\u9ad8\u6548\u6280\u672f\uff0c\u80fd\u591f\u5927\u89c4\u6a21\u51cf\u5c11\u5927\u6c14\u4e2d\u7684\u78b3\u542b\u91cf\u3002\u4e3a\u4e86\u5b9e\u73b0\u96f6\u6392\u653e\u7684\u76ee\u6807\uff0c\u4eca\u540e\u53ef\u80fd\u9700\u8981\u5229\u7528\u6cb9\u85cf\u8fdb\u884c\u4e8c\u6c27\u5316\u78b3\uff08CO2\uff09\u50a8\u5b58\u9879\u76ee\u800c\u4e0d\u8fdb\u884c\u77f3\u6cb9\u5f00\u91c7\u3002\u56e0\u6b64\uff0c\u672c\u7814\u7a76\u5bf9\u5357\u975e\u5e03\u96f7\u8fbe\u65af\u591a\u666e\u76c6\u5730\u4e2d\u7684\u4e00\u5904\u6cb9\u85cf\u8fdb\u884c\u4e86CO2\u50a8\u5b58\u7684\u52a8\u6001\u6a21\u62df\u7814\u7a76\u3002\u7814\u7a76\u8003\u8651\u4e86\u6ce8\u5165CO2\u5230\u6cb9\u85cf\u7684\u65f6\u95f4\u8303\u56f4\uff0c\u5206\u522b\u4e3a20\u5e74\uff082030\u5e74\u81f32050\u5e74\uff09\u548c100\u5e74\uff082050\u5e74\u81f32150\u5e74\uff09\uff0c\u5e76\u5bf9CO2-\u76d0\u6c34-\u6cb9\u76f8\u4e92\u4f5c\u7528\u548c\u6cb9\u85cf\u8fb9\u754c\u6761\u4ef6\u8fdb\u884c\u4e86\u654f\u611f\u6027\u5206\u6790\u3002<\/span>
\n\u5728\u95ed\u5408\u8fb9\u754c\u60c5\u666f\u4e0b\uff0c\u76ee\u6807\u6ce8\u5165\u901f\u7387\u4e3a\u6bcf\u5e740.5 Mt\uff0c\u6ce8\u5165\u901f\u7387\u9010\u6e10\u51cf\u5c11\u4ee5\u907f\u514d\u8d85\u8fc7\u6cb9\u85cf\u7684\u7834\u88c2\u538b\u529b\uff0c\u4ece\u800c\u9632\u6b62\u538b\u529b\u79ef\u805a\u73b0\u8c61\u7684\u53d1\u751f\u3002\u7531\u4e8e\u6ce8\u5165\u7684CO2\u4f53\u79ef\u51cf\u5c11\u4ee5\u53ca\u7ea6\u675f\u538b\u529b\u7684\u5b58\u5728\uff0cCO2\u6d53\u5ea6\u7684\u8fc1\u79fb\u5e76\u4e0d\u8fc5\u901f\u3002\u6a21\u62df\u7ed3\u679c\u663e\u793a\uff0c\u8be5\u7cfb\u7edf\u53d7\u91cd\u529b\u4e3b\u5bfc\uff0c\u5728\u6a21\u62df\u7ed3\u675f\u65f6\u5c1a\u672a\u8fbe\u5230\u91cd\u529b\u7a33\u5b9a\u72b6\u6001\uff0c\u56e0\u4e3a\u6d41\u4f53\u754c\u9762\u5c1a\u672a\u5e73\u5766\u3002<\/span>
\n\u76f8\u53cd\uff0c\u5f00\u653e\u8fb9\u754c\u6cb9\u85cf\u5219\u5177\u6709\u4f9b\u5e94CO2\u7684\u80fd\u529b\uff0c\u56e0\u4e3a\u6240\u6709\u8fb9\u754c\u90fd\u662f\u5f00\u653e\u7684\uff0c\u76ee\u6807\u6ce8\u5165\u901f\u7387\u5f97\u5230\u5b9e\u73b0\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7cfb\u7edf\u53d7\u7c98\u6027\u4e3b\u5bfc\uff0c\u6ca1\u6709\u51fa\u73b0\u538b\u529b\u79ef\u805a\u73b0\u8c61\u3002<\/span>
\n\u5728\u4e24\u79cd\u60c5\u51b5\u4e0b\uff0cCO2\u5728\u6cb9\u548c\u76d0\u6c34\u4e2d\u7684\u6eb6\u89e3\u662f\u6d3b\u8dc3\u7684\uff0c\u6c34\u548c\u6cb9\u4e2d\u6eb6\u89e3\u7684CO2\u5206\u6570\u9010\u6e10\u589e\u52a0\u3002\u57282050\u5e74\u81f32150\u5e74\u671f\u95f4\uff0c\u6c14\u6001CO2\u76f8\u7684\u6d53\u5ea6\u4e0b\u964d\uff0c\u4e3b\u8981\u56fa\u5b9a\u673a\u5236\u5305\u62ec\u6784\u9020\u56fa\u5b9a\u3001\u6eb6\u89e3\u5728\u6cb9\u548c\u6c34\u4e2d\uff0c\u4ee5\u53ca\u6b8b\u7559\u56fa\u5b9a\u3002<\/span>
\n\u7814\u7a76\u7ed3\u679c\u663e\u793a\uff0c\u8fb9\u754c\u6761\u4ef6\u5bf9\u9879\u76ee\u7684\u6210\u529f\u81f3\u5173\u91cd\u8981\uff0c\u76f4\u63a5\u5f71\u54cd\u6ce8\u5165\u901f\u7387\u548c\u538b\u529b\u3002\u8fd9\u9879\u7814\u7a76\u5f00\u521b\u6027\u5730\u63a2\u7d22\u4e86CO2\u6ce8\u5165\u5230\u6cb9\u85cf\u4ee5\u53caCO2-\u76d0\u6c34-\u6cb9\u7684\u76f8\u4e92\u4f5c\u7528\uff0c\u5e76\u5bf9\u5357\u975e\u4e00\u4e2a\u5c01\u95ed\u7684\u548c\u4e00\u4e2a\u5f00\u653e\u7684\u6cb9\u6c14\u7cfb\u7edf\u7684\u6cb9\u85cf\u8fb9\u754c\u6761\u4ef6\u8fdb\u884c\u4e86\u654f\u611f\u6027\u5206\u6790\u3002<\/span><\/p>\n

\n
\n
\n
\u5357\u975e\u897f\u5f00\u666e\u5927\u5b66\u5730\u7403\u79d1\u5b66\u7cfb<\/span><\/h5>\n<\/div>\n<\/div>\n<\/div>\n
Abstract<\/span><\/h5>\n

Geological carbon storage provides an efficient technology for the large-scale reduction of atmospheric carbon, and the drive for net-zero emissions may necessitate the future usage of oil reservoirs for CO2<\/sub>\u00a0projects (without oil production), hence, dynamic modeling of an oil reservoir for CO2<\/sub>\u00a0storage in the Bredasdorp basin, South Africa, was therefore conducted. Injection into the reservoir was for 20\u00a0years (2030\u20132050), and 100\u00a0years (2050\u20132150) to study the CO2<\/sub>\u2013brine\u2013oil interactions, with sensitivities carried out on reservoir boundary conditions. The closed boundary scenario experienced pressure buildup with a target injection rate of 0.5\u00a0Mt\/year, and a cutback on injection rate progressively until 2050 to not exceed the fracture pressure of the reservoir. The CO2<\/sub>\u00a0plume migration was not rapid due to the reduced volume of CO2<\/sub>\u00a0injected and the confining pressure. The system was gravity dominated, and gravity stability was not attained at the end of the simulation as fluid interfaces were not yet flat. The open boundary reservoir did not experience a pressure buildup because all boundaries were open, the target injection rate was achieved, and it was a viscous-dominated system. In both cases, the dissolution of CO2<\/sub>\u00a0in oil and brine was active, and there was a growing increase of CO2<\/sub>\u00a0fraction dissolved in water and oil, a decline in gaseous mobile CO2<\/sub>\u00a0phase between 2050 and 2150, and active trapping mechanisms were structural trapping, dissolution in oil and water, and residual trapping. The study showed that boundary condition was very crucial to the success of the project, with direct impacts on injection rate and pressure. This pioneering study has opened a vista on the injection of CO2<\/sub>\u00a0into an oil reservoir,<\/sub>\u00a0and CO2<\/sub>\u2013brine\u2013oil interactions, with sensitivities carried out on reservoir boundary conditions in a closed and an open hydrocarbon system in South Africa.<\/span>
\nFigure 1<\/strong><\/span>
\n\"figure<\/span>
\n\"figure<\/span>
\n\"figure<\/span><\/p>\n

Conclusion<\/span><\/h2>\n

In this study, an oil reservoir in the offshore lying Bredasdorp basin, South Africa, has been considered for CO2<\/sub>\u00a0storage, without enhanced oil recovery (EOR). The closed boundary scenario experienced a pressure buildup with a target injection rate of 0.5\u00a0Mt\/year, and therefore a cutback on injection rate progressively until 2050 to ensure the reservoir and overlying seal were not damaged. Migration of the CO2<\/sub>\u00a0plume was not rapid, due to the reduced volume of CO2<\/sub>\u00a0that was injected and confining state of the reservoir, the system was gravity dominated but did not attain gravity stability at the end of the simulation. There was a growing increase of CO2<\/sub>\u00a0fraction dissolved in water and oil and a decline in the gaseous mobile CO2<\/sub>\u00a0phase between 2050 and 2150. In 2150, 4.8% had dissolved in water, 35.9% dissolved in oil, 3.6% was trapped residually and 55.5% was in the gaseous mobile phase. The open boundary state experienced no pressure buildup in the reservoir and the target injection rate of 0.5\u00a0Mt\/year was achieved, and 10.4\u00a0Mt of CO2<\/sub>\u00a0had been successfully injected into the reservoir. CO2<\/sub>\u00a0plume migrated up-dip without getting to the reservoir flanks, it was a viscous-dominated system attended with gravity movement and segregation. With an increase in the density of formation fluids, the dissolution of CO2<\/sub>\u00a0in brine and oil was active, active trapping mechanisms were structural trapping, dissolution in oil and water and residual trapping. There was a decline in the gaseous mobile CO2<\/sub>\u00a0phase and an increase in CO2<\/sub>\u00a0fraction dissolved in oil and water between 2050 and 2150.<\/span>
\nWith further residence time, fractions of CO2<\/sub>\u00a0dissolved in the oil and brine phases would increase, as well as residually trapped fractions, with the CO2<\/sub>\u00a0gaseous mobile phase experiencing a continuous decline. Therefore, this study showed that boundary condition was key to the success of the project, as it impacts injection rate and pressure.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Dynamic modeling of geological carbon storage in aContinue Reading<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[159],"tags":[251],"_links":{"self":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/62004"}],"collection":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=62004"}],"version-history":[{"count":0,"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/62004\/revisions"}],"wp:attachment":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=62004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=62004"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=62004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}