TITLE:
Hydrocarbon Accumulation Characteristics of Chang 2 Reservoir in Eastern Xiaohe, Jingbian Oilfield, Ordos Basin, China
AUTHORS:
Chenzi Liu, Yu Zhang, Luyao Gao
KEYWORDS:
Chang 2, Reservoir, Accumulation Rule, The Eastern Part of Xiaohe
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.12 No.12,
December
16,
2024
ABSTRACT: Using hydrocarbon geochemistry, reservoir properties and oil test data, we have studied the oil source conditions, reservoir characteristics, age of formation and oil and gas enrichment rules of the Chang 2 reservoir in the eastern part of Xiao he of the Jingbian Oilfield by using common thin section and fluid inclusions and other technical methods. The results of the study show that: the eastern part of Xiao he area develops Chang 7 high-quality hydrocarbon source rock, its organic carbon is 2.20% on average, the type of organic matter is I-II1 type which is mainly oil-generating, and has reached the stage of a large amount of oil-generating, which can provide the material basis for the formation of the Chang 2 oil reservoir. The physical properties of the Chang 2 reservoir are relatively good, and the reservoir capacity is strong. The type of Chang 2 reservoir is tectonic-lithological composite reservoir; the temperature measurement of reservoir fluid inclusions shows that the reservoir was mainly formed in the middle and late Early Cretaceous period, and the time is about 115 Ma; the distribution and enrichment of the Chang 2 reservoir are mainly controlled by the integrated control of the storage cap layer and the physical properties of the reservoir.