کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5754517 | 1412614 | 2017 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Origin of diagenetic calcite cements in the continental Qaidam Basin, NW China: Implication for fluid flow and hydrocarbon migration
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Origin of diagenetic calcite cements in the continental Qaidam Basin, NW China: Implication for fluid flow and hydrocarbon migration Origin of diagenetic calcite cements in the continental Qaidam Basin, NW China: Implication for fluid flow and hydrocarbon migration](/preview/png/5754517.png)
چکیده انگلیسی
Three origins of calcite cement were clearly identified: (i) hydrocarbon source rocks in thermal degradation stage, (ii) lacustrine carbonates in deep strata, and (iii) paleo-lakewater. Two episodes of organic fluids derived from the Jurassic source rocks flowed towards the basin margin, resulting in two rounds of acidic â hydrocarbon â alkaline fluid evolution identified in the reservoir sandstones. Calcite (Ca 1) precipitation generated highly calcite-cemented sandstones, which severely downgraded the reservoir quality. However, the second episode of acidic fluid created new porous zones for subsequent hydrocarbon accumulation. Although the cementation history in the central basin did not occlude all porosity, the presence of fluids derived from buried lacustrine carbonates suggests a poor prospect for hydrocarbon migration. The good spatial correlation between the occurrence of the 13C-depleted calcite cement and the presence of hydrocarbons suggests that the 13C-depleted calcite (relative to lacustrine carbonates) may be an indicator of hydrocarbon migration in the northern Qaidam Basin.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geochemical Exploration - Volume 182, Part A, November 2017, Pages 94-109
Journal: Journal of Geochemical Exploration - Volume 182, Part A, November 2017, Pages 94-109
نویسندگان
Aiguo Wang, Ting Liang, Long Li, Zhenliang Wang, Changyu Fan, Yisong Wang, Yongshu Zhang, Hongxi Kong,