Effects of mineral composition and heterogeneity on the reservoir quality evolution with CO2 intrusion
作者： Leilei Yang , Tianfu Xu , Bing Yang , Hailong Tian , Hongwu Lei
DOI: 10.1002/2013GC005157
关键词:
摘要: During the diagenesis of rocks in a sedimentary basin, an intrusion CO2 could cause dissolution or/and precipitation surrounding rocks. As result, reservoir quality may be altered. The mineral composition and heterogeneity have pronounced impacts on geochemical reaction evolution. A numerical simulation method is employed to investigate influences primary diagenesis. Based measured data from Songliao Basin, total 26 two-dimensional models with different are set up. To mimic regionally heterogeneous distribution composition, Monte Carlo employed. gas magma origin, located northeastern China, selected for present study. ideal site investigating impact after intrusion. In this reservoir, presence high-pressure CO2, causes significant minerals, which decreases porosity degrades quality. reactions caused by vary widely. similar distributions Dominant secondary minerals dawsonite early ankerite late stage. diagenetic sequences modeled our simulations reproduce petrographic well.
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