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dc.creatorXu Q.
dc.creatorXie X.
dc.creatorZhang C.
dc.creatorHai L.
dc.creatorBusbey A.
dc.date.accessioned2022-09-26T18:58:49Z
dc.date.available2022-09-26T18:58:49Z
dc.date.issued2022
dc.identifier.urihttps://doi.org/10.2113/2022/7760591
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/55784
dc.description.abstractDiagenesis varies greatly from basin to basin and has been considered as the key control of the reservoir quality of tight sandstones. In this study, we analyzed the petrographic characteristics, diagenesis, and pore types and characteristics of the Permian Lower Shihezi Formation in the Ordos Basin. Results show that most of sandstones are litharenites with minor sublitharenites and feldspathic litharenites. The tight sandstones have ultralow permeabilities (averaging 0.67 mD) and porosities (averaging 8.35%), with pore-throat sizes ranging from 0.035 to 13.29 ?m with 94.12% less than 5 ?m. Overall, the tight sandstone reservoirs have undergone complex diagenetic alteration. Compaction and clay mineral cements are the two crucial diagenetic factors that controlled the tightness of the reservoirs. The compaction destroyed most of primary porosity, and the effective pores are mainly dissolved micropores, intragranular dissolved micropores, and micropores in clay minerals and mineral grains. The chlorite coating might have helped preserve a certain amount of porosity, but pore-lining chlorites significantly obstructed pore throats and reduced permeability. Results of the study provide insights and direct implications for the future success of exploration and production of the tight gas sandstone in the Ordos Basin and other similar tight sandstone reservoirs © 2022. Qinghai Xu et al. Exclusive Licensee GeoScienceWorld. Distributed under a Creative Commons Attribution License (CC BY 4.0)
dc.languageen
dc.publisherGeoScienceWorld
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceLithosphere
dc.subjectClay minerals
dc.subjectCompaction
dc.subjectMetamorphic rocks
dc.subjectMicroporosity
dc.subjectPetroleum prospecting
dc.subjectQuality control
dc.subjectSandstone
dc.subjectSedimentology
dc.subjectTight gas
dc.subjectKey control
dc.subjectMicropores
dc.subjectNorthern Ordos Basin
dc.subjectPermian
dc.subjectPetrographic characteristics
dc.subjectReservoir quality
dc.subjectTight gas sandstones
dc.subjectTight sandstone reservoirs
dc.subjectTight sandstones
dc.subjectChlorine compounds
dc.subjectchlorite
dc.subjectclay mineral
dc.subjectcoating
dc.subjectdiagenesis
dc.subjecthydrocarbon reservoir
dc.subjectmineral
dc.subjectmineral exploration
dc.subjectPermian
dc.subjectsandstone
dc.subjectChina
dc.subjectOrdos Basin
dc.subjectShihezi
dc.subjectXinjiang Uygur
dc.titleIntegrated Diagenesis Study of Tight Gas Sandstone: The Permian Lower Shihezi Formation, Northern Ordos Basin, China
dc.typeArticle
dc.rights.holder2022 Qinghai Xu et al
dc.rights.licenseCC BY 4.0
local.collegeCollege of Science and Engineering
local.departmentGeological Sciences
local.personsXie (GEOL), Busbey (GEOL)


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