Geochemical Characteristics of Crude Oil and Oil-Source Correlation in Halahatang Sag

doi:10.7657/XJPG20160607

Abstract

Abstract: The Halahatang sag in Tarim basin is abundant in petroleum resources with the proved reserves over one hundred million tons. In order to confirm the major source rocks of Ordovician reservoirs in Halahatang sag, systematic geochemical analyses are performed for oil samples from Well ZS1 and Halahatang sag and characteristics of light hydrocarbons and biomarkers are further studied. The results show that the Halahatang oil samples are characterized by high content of n-alkanes and poor content of aromatic hydrocarbons, which are similar to those of oil samples from Well ZS1, indicating the typical sapropelic origin. The aryl isoprenoid compounds detected in the oil samples from Halahatang sag are the markers for strong reducing sedimentary environment. Combined with the characteristics of source rocks and geological settings in Halahatang sag, it is considered that the marine oil in the study area mainly originates from the Cambrian to Lower Ordovician source rocks instead of the Middle to Upper Ordovician source rocks

CLC Number:

TE111.3

LI Zhongxuan1, XU Zhiming1,WANG Zhaoming2, CHEN Yunchuan3, XIAO Zhongyao2. Geochemical Characteristics of Crude Oil and Oil-Source Correlation in Halahatang Sag[J]. , 2016, 37(6): 1-1.

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Geochemical Characteristics of Crude Oil and Oil-Source Correlation in Halahatang Sag

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