Geochemical Characteristics and Source of Light Oil in the Deep Eslower4 Layers Underlying Salt in the Northern Dongying Sag
Received date: 2008-12-27
Revised date: 2009-03-09
Online published: 2009-04-10
Based on the analysis of saturated hydrocarbons, light hydrocarbons and double diamantane, the geochemical characteristics of the light oil in the Eslower4 (the lower part Eslower4 Member) layers underlying salt were systematically studied in the northern Dongying Sag. It is discovered that the phytane is slightly predominant with the Pr/Ph ratio 0.7 in the light oil. n-alkanes are predominant and isoalkanes are less in light hydrocarbons. The 2\|methylhexane/3\|methylhexane ratio is larger than 1. These indicate that the source rocks were in a reducing lacustrine depositional environment and the parent material is preferable. The light hydrocarbon fingerprint correlation and the double diamantine maturity index analysis show that the light oil originated from theEslower4 source rocks underlying salt. Therefore, theEslower4 layers underlying salt are important prospects for exploration in the Dongying Sag.
WANG Ru . Geochemical Characteristics and Source of Light Oil in the Deep Eslower4 Layers Underlying Salt in the Northern Dongying Sag[J]. Natural Gas Geoscience, 2009 , 20(2) : 278 -281 . DOI: 10.11764/j.issn.1672-1926.2009.02.278
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