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Assessing roles of geochemical reactions on CO_(2)plume,injectivity and residual trapping

Energy Geoscience 2021年第4期2卷 327-336页

作者： Abdiaziz Abdullahi Maalim Hisham Ben Mahmud Mojtaba Seyyedi Curtin University Malaysia CDT250Miri98000SarawakMalaysia CSIRO GPO Box 1700Canberra ACT2601Australia

With increasing CO_(2)concentration in the atmosphere,CO_(2)geo-aequestration has become a popular technique to counter the dangers of global warming resulting from high levels of CO_(2)in the *** paper examins sequestration parameters such as CO_(2)plume behaviour,residual gas trapping and injectivity as a means of achieving safe and successful CO_(2)storage in saline *** precipitation/dissolution rates are used to establish a relationship between these parameters and geochemical reactions in saline *** achieve this,mechanistic models(6 models with different inputs,created using CMG e GEM,2016 and WINPROP,2016)are simulated using input data from literature and studying changes in fluids and formation properties as well as mineral precipitation/dissolution rates in aquifers when subjected to different conditions in the different *** results from the models show that high CO_(2)dissolution,which creates large CO_(2)plume,leads to high mineral dissolution/precipitation as results of increased fluid-rock interactions(geochemical reactions);whereas injectivity,although enhanced by CO_(2)-water cyclic injection,does not show much increase in bottom hole pressure when mineral trapping(thus geochemical reactions)is introduced into the *** study on residual gas trapping shows that high residual gas saturation leads to reduced mineral precipitation/dissolution due to the reduced amount of dissolved CO_(2)in ***,rapid changes in the bottom hole pressure at high residual gas saturation means that a formation that fosters high residual gas trapping,rather than CO_(2)dissolution in brine,is more likely to experience injectivity issues during the sequestration process.

关键词： geochemical reactions CO_(2)plume Residual(gas)trapping Injectivity Mineral precipitation Mineral dissolution

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Effect of multi-component ions exchange on low salinity EOR:Coupled geochemical simulation study

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Petroleum 2016年第3期2卷 215-224页

作者： Ehsan Pouryousefy Quan Xie Ali Saeedi Department of Petroleum Engineering Curtin UniversityWestern AustraliaAustralia

The mechanism(s)of Low salinity water flooding(LSWF)has been extensively investigated for 15 e20 years,as a cost-effective and environmentally friendly technique for improved oil ***,there is still no consensus on the dominant mechanism(s)behind low salinity effect due to the complexity of interactions in the Crude oil/Brine/Rock(COBR)*** wettability is most agreed mechanism of low salinity EOR ***,the mechanism(s)behind the wettability change is debated between multi-component ion exchange(MIE)and double layer expansion(DLE)in sandstone *** paper aims to investigate the effectiveness of MIE with a coupled geochemical-reservoir model using published experimental data reported by Nasralla and Nasr-El-Din[1].We created core-scale numerical models with parameters identical to those used in the *** simulated the low salinity effect using a commercial reservoir simulator,CMG-GEM,by coupling three chemical reactions:(1)aqueous reaction,(2)multi-component ion exchange,and(3)mineral dissolution and *** modelled the adsorption of divalent cations on the surface of the clay minerals during low salinity water *** results were compared with the experimental *** results show that the fractional adsorption of divalent cations(Ca^2+)increased almost 25%by injecting a 2000 ppm NaCl solution,compared to initial 10,000 ppm *** a 2000 ppm of CaCl2 solution,however,significantly increased the adsorbed Ca^2+from 0.1 to 1,which implies the complete saturation of mineral surface with divalent ***,injecting 50,000 ppm of CaCl2 solution also demonstrated the same effect as the 2000 ppm CaCl2 solution but with a faster *** combining the simulation and experimental results,we concluded that the multicomponent ion exchange is not the sole mechanism behind low salinity effect for two ***,almost 10%additional oil recovery was observed from the experime

关键词： Enhanced oil recovery Low salinity water flooding geochemical reactions Numerical simulation

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二氧化碳在York地层中埋存的地球化学模拟(英文)

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Chinese Journal of Chemical Engineering 2011年第6期19卷 1052-1059页

作者：杨子浩金敏李明远董朝霞闫鹏 Enhanced Oil Recovering Center China University of Petroleum(Beijing) Institute of Petroleum Engineering Heriot-Watt University

In this paper, we build up a three-dimensional model for CO2 storage in the deep reservoir. And this paper gives the mathematical formalism of combined geochemical and multi-phase flow. The results give us the information about geochemical changing caused by CO2 injection into aqueous, the dissolution or precipitation of reservoir minerals caused by aqueous components change, the change of water density, also the differences between this model and the simulation model without considering geochemical. The basic data for simulation is from York Reservoir.

关键词： CO2 storage geochemical reactions multi-phase flow numerical simulation York reservoir

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