Evaluation of Source Rocks of Well Shaxin-1 in Southwestern Margin of Qaidam Basin

Abstract

Abstract: The study on the comprehensive evaluation about the abundance of organic matter, type and maturity in dark mudstone of Paleogene and Neogene, ddrilled in Well Shaxin-1 on the structural belt of Shizigou-Youshashan in west deression of Qaidam basin and the oil-source correlation in the major layer of E3x and N1s of this well with its adjacent wells show that main part of the dark mudstone in Well Shaxin-1 is medium source rocks with organic matter of Type Ⅱ1 and Ⅱ2 . The source rock of N2 2s is in stage of low maturity, while those of N1s-E3x have entered mature stage. The correlation of oil sources indicates that the oil source from Well Block Shaxin-1 differs from adjacent wells areas and it assumes self-generating and self-storage type, which constraints the scale of hydrocarbon accumulation in some extent in Well Block Shaxin-1.

Key words: Qaidam basin, Shizigou oilfield, source rock evaluation, oil source correlation

CLC Number:

TE112.114

QING Ying, LUO Jin-hai, ZHANG Jing-yi, LIU Gui-hua, GAO Xue-feng. Evaluation of Source Rocks of Well Shaxin-1 in Southwestern Margin of Qaidam Basin[J]. Xinjiang Petroleum Geology, 2008, 29(2): 202-205.

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Evaluation of Source Rocks of Well Shaxin-1 in Southwestern Margin of Qaidam Basin

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