2021
DOI: 10.1177/01445987211049302
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Genesis and pore evolution of dolomite reservoir in the Majiagou Formation, Ordos Basin, China

Abstract: In gypsum–carbonate rock assemblages, multistage and complex fluids control the formation of dolomite reservoirs that are a focus of hydrocarbon exploration. It is difficult to determine the types of dolomite reservoirs and their formation mechanisms due to the diverse rock assemblages and multiple stages of diagenesis. In this study, we investigated the petrology, reservoir physical properties, and geochemistry of the 6th sub-member of member five of the Majiagou Formation (i.e. Ma56) in the Ordos Basin, Chin… Show more

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“…Although the concentrations of Ca and Mg in Laguna Verde are lower compared to those in other AMEs (e.g., Villafañe, Lencina, et al., 2021 ), the lack of detected carbonates does not preclude the potential for these minerals to precipitate at certain stages within the lake's hydrogeochemical cycle. Their absence could be explained by different factors, such as the higher resistance of gypsum with respect to carbonate to acid dissolution (Kobluk & Crawford, 1990 ) or a pervasive effect of gypsum due to its (post‐depositional) precipitation during fluid circulation through the pore space (Babel et al., 2011 ; Henares et al., 2016 ; Laurent et al., 2016 ; Wang et al., 2022 ).…”
Section: Discussionmentioning
confidence: 99%
“…Although the concentrations of Ca and Mg in Laguna Verde are lower compared to those in other AMEs (e.g., Villafañe, Lencina, et al., 2021 ), the lack of detected carbonates does not preclude the potential for these minerals to precipitate at certain stages within the lake's hydrogeochemical cycle. Their absence could be explained by different factors, such as the higher resistance of gypsum with respect to carbonate to acid dissolution (Kobluk & Crawford, 1990 ) or a pervasive effect of gypsum due to its (post‐depositional) precipitation during fluid circulation through the pore space (Babel et al., 2011 ; Henares et al., 2016 ; Laurent et al., 2016 ; Wang et al., 2022 ).…”
Section: Discussionmentioning
confidence: 99%