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Characteristics of hydrocarbon source rock and evaluation of Cretaceous Dalazi Formation in Luozigou Basin

Guoli Hao

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Abstract

The Upper Member of Dalazi Formation is the main oil source rocks in Luozigou Basin.By systematic sampling and geochemical indicator testing,we analyzed the organic abundance,types and maturity of the drohycarbon source rocks.The organic content of hydrocarbon source rocks of the Dalazi Formation is 0.94% to 10.69%,averaging 4.72%.The organic type is mainly the typeⅠ,and then the type Ⅱ1.The maximum pyrolysis temperature(Tmax) is from 425℃ to 444℃,and averaging 436℃.The vitrinite reflectance(Ro) is from 0.624% to 0.88%,averaging 0.64%.The geochemical data indicate that the hydrocarbon source rocks of the Dalazi Formation are better in quality.

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The Upper Member of Dalazi Formation is the main oil source rocks in Luozigou Basin.By systematic sampling and geochemical indicator testing,we analyzed the organic abundance,types and maturity of the drohycarbon source rocks.The organic content of hydrocarbon source rocks of the Dalazi Formation is 0.94% to 10.69%,averaging 4.72%.The organic type is mainly the typeⅠ,and then the type Ⅱ1.The maximum pyrolysis temperature(Tmax) is from 425℃ to 444℃,and averaging 436℃.The vitrinite reflectance(Ro) is from 0.624% to 0.88%,averaging 0.64%.The geochemical data indicate that the hydrocarbon source rocks of the Dalazi Formation are better in quality.

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Available abstract

The Upper Member of Dalazi Formation is the main oil source rocks in Luozigou Basin.By systematic sampling and geochemical indicator testing,we analyzed the organic abundance,types and maturity of the drohycarbon source rocks.The organic content of hydrocarbon source rocks of the Dalazi Formation is 0.94% to 10.69%,averaging 4.72%.The organic type is mainly the typeⅠ,and then the type Ⅱ1.The maximum pyrolysis temperature(Tmax) is from 425℃ to 444℃,and averaging 436℃.The vitrinite reflectance(Ro) is from 0.624% to 0.88%,averaging 0.64%.The geochemical data indicate that the hydrocarbon source rocks of the Dalazi Formation are better in quality.

Key concepts: Source rock, Geology, Hydrocarbon, Maturity (psychological), Vitrinite reflectance, Structural basin, Geochemistry, Cretaceous

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Characteristics of hydrocarbon source rock and evaluation of Cretaceous Dalazi Formation in Luozigou Basin — Research Paper | ScholarLens