{"id":16067,"date":"2022-02-06T08:12:12","date_gmt":"2022-02-06T00:12:12","guid":{"rendered":"http:\/\/learncmg.cn\/?p=16067"},"modified":"2022-02-06T08:12:12","modified_gmt":"2022-02-06T00:12:12","slug":"41-%e5%87%9d%e6%9e%90%e6%b0%94%e8%97%8fco2%e5%bc%ba%e5%8c%96%e9%87%87%e6%b0%94%e5%92%8c%e5%9c%b0%e8%b4%a8%e5%b0%81%e5%ad%98%ef%bc%9a%e6%b3%a8%e5%85%a5%e5%8e%8b%e5%8a%9b%e5%af%b9%e5%87%9d%e6%9e%90","status":"publish","type":"post","link":"http:\/\/learncmg.cn\/?p=16067","title":{"rendered":"41. \u51dd\u6790\u6c14\u85cfCO2\u5f3a\u5316\u91c7\u6c14\u548c\u5730\u8d28\u5c01\u5b58\uff1a\u6ce8\u5165\u538b\u529b\u5bf9\u51dd\u6790\u6c14\u85cf\u91c7\u6536\u7387\u548cCO2\u50a8\u5b58\u6548\u7387\u5f71\u54cd\u7684\u6a21\u62df\u7814\u7a76"},"content":{"rendered":"
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CO2<\/sub>\u00a0Enhanced Gas Recovery and Geologic Sequestration in Condensate Reservoir: A Simulation Study of the Effects of Injection Pressure on Condensate Recovery from Reservoir and CO2<\/sub>\u00a0Storage Efficiency<\/span><\/a><\/h4>\n

Abstract<\/h2>\n
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Hydrocarbon recovery efficiency can be increased by injecting miscible CO2<\/sub>\u00a0gas in order to displace hydrocarbons towards producing wells. This process of enhanced oil recovery can simultaneously and subsequently be used for CO2<\/sub>\u00a0storage after complete hydrocarbon reservoir depletion. Condensate reservoirs provide possible storage sites, with the additional benefit of enhanced gas recovery through re-pressurization of the reservoir and re-vaporization of the condensate. However a lot more research needs to be done. In order to accurately determine the effect of the injected CO2<\/sub>, the compositional simulator CMG- GEM was used. The aim of this paper was to examine the effect of CO2<\/sub>\u00a0injection pressures on condensate recovery and CO2<\/sub>\u00a0storage. We used a tuned Peng and Robinson equation of state to model the interactions of the CO2<\/sub>\u00a0with the hydrocarbons.<\/p>\n

It was observed that the injection of CO2<\/sub>\u00a0had a positive effect on the re-vaporization of condensate dropout in the reservoir. Increasing the injection pressure yielded higher condensate recoveries up to a certain value (as high as 16%). At this point, the producer experienced liquid loading issues. Additionally, more than 90% of the injected CO2<\/sub>\u00a0remained in the reservoir for this specific model. A large percentage of this trapped CO2<\/sub>\u00a0remained in the supercritical phase. Increasing the injection pressure increased the percentage of CO2<\/sub>\u00a0trapped in the reservoir by hysteresis (as high as 30%). This increased injection pressure had negligible effects on the CO2<\/sub>\u00a0dissolved in the formation water.<\/p>\n

The results from these simulation studies show that the use of CO2<\/sub>\u00a0to increase condensate recovery from the reservoir is feasible with the additional benefit of CO2<\/sub>\u00a0sequestration.<\/p>\n

Keywords<\/h2>\n
CO2<\/sub> Enhanced Gas Recovery,\u00a0Geologic Sequestration,\u00a0Condensate Reservoir,\u00a0Injection Pressure,\u00a0Storage Efficiency<\/div>\n
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