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Characteristics of hydrocarbon source rocks of No.3 buried-hill region in Nanpu Sag

Characteristics of hydrocarbon source rocks of No.3 buried-hill region in Nanpu Sag
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摘要 Based on the data of 44 samples of hydrocarbon source rocks in Nanpu No.3 buffed-hill region, the kerogen type is judged through the pyrolysis and microscopic identification. At the same time, organic matter maturity and hydrocarbon generation threshold are studied by using vitrinite reflectance, pyrolysis yield and hydrocarbon abundance. Meanwhile the hydrocarbon expulsion threshold is calculated. And the characteristics of organic hydrocarbon generation and expulsion are preliminarily revealed and evaluated. The result shows that the No.3 buffed-hill region has abundant hydrocarbon source rocks with high content of organic carbon. And the primary types of kerogen are II, and lI 2. The hydrocarbon source rocks which passed biochemistry, thermolysis and thermal cracking have developed into the mature-postmature phase of different extents. And plenty of oil and gas were expelled out. It is believed the depth of oil-generating window is 3 600 m and the depth of hydro- carbon-expulsion threshold is 4 100 m. The comprehensive analysis indicates that Nanpu No.3 burried-hill region has a certain condition to generate hydrocarbon which is very promising in oil exploration and thus can become an important exploration and development target next.
出处 《Engineering Sciences》 EI 2014年第1期87-92,96,共7页 中国工程科学(英文版)
关键词 hydrocarbon source rocks KEROGEN pyrolysis yield index oil threshold hydrocarbon-expulsion threshold 排烃特征 烃源岩 南堡凹陷 山地 有机质成熟度 干酪根类型 镜质体反射率 石油勘探
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