{"id":59708,"date":"2023-03-20T06:00:14","date_gmt":"2023-03-19T22:00:14","guid":{"rendered":"http:\/\/learncmg.cn\/?p=59708"},"modified":"2023-03-20T06:00:14","modified_gmt":"2023-03-19T22:00:14","slug":"248-%e7%a2%b3%e9%85%b8%e7%9b%90%e5%b2%a9%e9%9d%9e%e6%b7%b7%e7%9b%b8co2-lswag%e6%b3%a8%e5%85%a5%e7%89%a9%e5%8c%96%e5%92%8c%e5%9c%b0%e5%8c%96%e7%9b%b8%e4%ba%92%e4%bd%9c%e7%94%a8%e7%9a%84%e7%bb%bc","status":"publish","type":"post","link":"http:\/\/learncmg.cn\/?p=59708","title":{"rendered":"248. \u78b3\u9178\u76d0\u5ca9\u975e\u6df7\u76f8CO2-LSWAG\u6ce8\u5165\u7269\u5316\u548c\u5730\u5316\u76f8\u4e92\u4f5c\u7528\u7684\u7efc\u5408\u6a21\u62df\u7814\u7a76"},"content":{"rendered":"

A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO2<\/sub>-LSWAG Injection in Carbonates<\/strong><\/a><\/h3>\n

Abstract<\/h2>\n

Low-salinity water-alternating-CO2<\/sub>\u00a0(CO2<\/sub>-LSWAG) injection has been widely studied and employed due to its capability to promote enhanced oil recovery (EOR). However, there is no consensus on the dominant mechanisms for oil recovery in carbonates due to the extreme complexity of the oil\u2013brine\u2013rock interactions. This work proposes a comparative investigation of the physicochemical and geochemical effects of continuous CO2<\/sub>\u00a0and CO2<\/sub>-LSWAG immiscible injections on oil recovery in a carbonate core. Simulations were carried out using oil PVT properties and relative permeability experimental data from the literature. A comparison of SO4<\/sub>2\u2212<\/sup>\u00a0and Mg2+<\/sup>\u00a0as interpolant ions, oil, water and gas production, pressure, and rock and fluid properties along the core and in the effluent was made. The results show a high recovery factor for CO2<\/sub>\u00a0(62%) and CO2<\/sub>-LSWAG (85%), even in immiscible conditions. The mineral dissolution and porosity variations were more pronounced for CO2<\/sub>-LSWAG than CO2<\/sub>. The simulation results showed that Mg2+<\/sup>\u00a0as an interpolant improves oil recovery more than SO4<\/sub>2\u2212<\/sup>\u00a0because Mg2+<\/sup>\u00a0concentration in the aqueous phase after LSW injection leads to relative permeability values, which are more favorable.
\nKeywords:\u00a0<\/strong>
\nimmiscible CO2<\/sub><\/strong><\/a>;\u00a0CO2<\/sub>-LSWAG<\/strong><\/a>;\u00a0carbonate<\/strong><\/a>;\u00a0physicochemical simulation<\/strong><\/a>;\u00a0geochemical simulation<\/strong><\/a>;\u00a0interpolants<\/strong><\/a>
\n
\n\"\u8868\u683c\n\u63cf\u8ff0\u5df2\u81ea\u52a8\u751f\u6210\"
\n\"\u8868\u683c\n\u4f4e\u53ef\u4fe1\u5ea6\u63cf\u8ff0\u5df2\u81ea\u52a8\u751f\u6210\"
\n<\/p>\n","protected":false},"excerpt":{"rendered":"

A Comprehensive Simulation Study of PhysicochemicaContinue 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":[263,396,538],"_links":{"self":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/59708"}],"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=59708"}],"version-history":[{"count":0,"href":"http:\/\/learncmg.cn\/index.php?rest_route=\/wp\/v2\/posts\/59708\/revisions"}],"wp:attachment":[{"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=59708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=59708"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/learncmg.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=59708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}