气候变化领域集成服务门户(CCPortal): Grain assemblages and diagenesis in organic-rich mudrocks; upper pennsylvanian cline shale (Wolfcamp D); Midland Basin; Texas

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DOI	10.1306/03022018240
	Grain assemblages and diagenesis in organic-rich mudrocks; upper pennsylvanian cline shale (Wolfcamp D); Midland Basin; Texas
	Peng J.; Milliken K.L.; Fu Q.; Janson X.; Scott Hamlin H.
发表日期	2020
ISSN	0149-1423
起始页码	1593
结束页码	1624
卷号	104 期号:7
英文摘要	Grain assemblages in the organic-rich Cline shale in the Midland Basin are dominated by components of extrabasinal derivation (11.4 to 98.5 vol. %; average volume: 82.6%). Major extrabasinal components include K-rich clay minerals, detrital quartz, albite, K-feldspar, micas, and lithic fragments. Intrabasinal components include mainly biosiliceous allochems (sponge spicules and radiolarians), agglutinated foraminifera, Ca-phosphate peloids, clay-rich peloids, organomineralic aggregates, intraclasts, and other biocalcareous allochems. Authigenic minerals are most evident as grain replacements, euhedral ankerite, Ca-phosphate cement, and precipitates in large pores. A strongly localized spatial distribution of diagenetic products at micron to centimeter scales is observed in most siliciclastic samples, except in biosiliceous allochem-rich ones in which abundant intergranular pore-filling clay-size microquartz cement is observed. Compaction is evident in the Cline shale because of low porosity and generally low cement volumes. Neither textural variation nor bulk mineral composition alone is sufficient to confidently decipher the rock bulk property (e.g., total organic carbon) and reservoir quality variation (e.g., porosity and permeability). However, a good negative relationship between the ratio of extrabasinal to intrabasinal grains and favorable reservoir properties is observed in the Cline shale. Specifically, higher porosity, permeability, and total organic carbon are observed in samples representing the extreme end members of intrabasinal-derived biosilica-rich layers. Nickel, a recognized proxy for paleoproductivity, exhibits a positive relationship with intrabasinal grain content and reservoir properties. X-ray fluorescence-based analysis of nickel can be a rapid and cost-effective way to delineate favorable unconventional reservoir quality in the Cline shale. © 2020. The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Cement industry; Cements; Clay minerals; Clay products; Cost effectiveness; Feldspar; Mica; Nickel; Organic carbon; Petroleum reservoir engineering; Porosity; Textures; Agglutinated foraminifera; Authigenic minerals; Intergranular pores; Mineral composition; Reservoir property; Total Organic Carbon; Unconventional reservoirs; X ray fluorescence; Shale; burial diagenesis; calcium; cement (sedimentology); foraminifera; mudstone; nickel; permeability; phosphate; pore space; porosity; shale; silica; total organic carbon; Midland Basin; Permian Basin; Texas; Texas; United States; Foraminifera; Radiolaria (protozoans)
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143691
作者单位	Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; BEG, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States
推荐引用方式 GB/T 7714	Peng J.,Milliken K.L.,Fu Q.,et al. Grain assemblages and diagenesis in organic-rich mudrocks; upper pennsylvanian cline shale (Wolfcamp D); Midland Basin; Texas[J],2020,104(7).
APA	Peng J.,Milliken K.L.,Fu Q.,Janson X.,&Scott Hamlin H..(2020).Grain assemblages and diagenesis in organic-rich mudrocks; upper pennsylvanian cline shale (Wolfcamp D); Midland Basin; Texas.AAPG Bulletin,104(7).
MLA	Peng J.,et al."Grain assemblages and diagenesis in organic-rich mudrocks; upper pennsylvanian cline shale (Wolfcamp D); Midland Basin; Texas".AAPG Bulletin 104.7(2020).