燕辽裂陷带辽西拗陷中元古界高于庄组生物标志化合物特征及意义

doi:10.13686/j.cnki.dzyzy.2021.03.016

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Abstract The oil-gas shows found in several bore wells in Liaoxi Depression of Yanliao Rift Zone bring the Meso-Neoproterozoic marine strata in the area once again into the focus of oil-gas exploration and research. Both gas chromatography and gas chromatography-mass spectrometry are used to study the biomarkers of source rocks from Mesoproterozoic Gaoyuzhuang Formation in LLD1 well, and analyze the organic matter source, sedimentary environment, and hydrocarbon generation potential. Through comprehensive analysis, it is considered that Gaoyuzhuang Formation belongs to poor-medium grade source rocks, as organic type of II₁, generally in mature-high mature stage with mass generation and expulsion of hydrocarbon. The carbon number distribution of n-alkanes in saturated hydrocarbon is pre-unimodal. The main peak carbon is mostly nC₁₇, with the advantage of C₂₇ regular sterane, indicating that the parent material input is dominated by lower organism. Combined with the distribution characteristics of terpanes, it is inferred that the main organic source is low bacteria algae. Moreover, the high gammacerane content and low Pr/Ph ratio reflect the main source rocks of Gaoyuzhuang Formation were formed in salt water reduction environment, with certain layers possibly in strongly reduced environment.

Key words： biomarker hydrocarbon generation potential Gaoyuzhuang Formation source rock Liaoxi Depression

Received: 12 March 2021

PACS:	P618.13
	P593

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	SUN Shou-liang
	LI Yong-fei
	ZHANG Tao
	CHEN Shu-wang
	TANG You-jun
	GAO Xiao-yong
	SUN Qiu-shi
	SUN Yue-cheng
	ZHOU Tie-suo
	ZONG Wen-ming
	SHI Lei

Cite this article:

SUN Shou-liang,LI Yong-fei,ZHANG Tao等. BIOMARKER CHARACTERISTICS AND IMPLICATION OF THE MESOPROTEROZOIC GAOYUZHUANG FORMATION IN LIAOXI DEPRESSION OF YANLIAO RIFT ZONE[J]. GEOLOGY AND RESOURCES, 2021, 30(3): 341-349.

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http://manu25.magtech.com.cn/Jweb_dzyzy/EN/10.13686/j.cnki.dzyzy.2021.03.016 OR http://manu25.magtech.com.cn/Jweb_dzyzy/EN/Y2021/V30/I3/341

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