辽河坳陷大民屯凹陷沙河街组四段页岩油富集资源潜力评价

doi:10.11743/ogg20160102

Abstract

Abstract: Recovery efficiency of shale oil is low due to high density,high viscosity,low porosity and low permeability,and it is necessary to evaluate the resource potential of the enriched resources that are high in resource abundance and low in exploitation difficulty.TOC over 4% is taken as the criteria for classification of enriched shale oil resource according to the triple-division relationship between S₁ and TOC.Because of the light and heavy hydrocarbon loss in S₁,S₁ should be corrected before it is used to evaluate the resource potential.Comparative analysis shows that S₂ decreases when the shale sample is extracted by chloroform,indicating that there are some residual hydrocarbons in S₂ but they have been eliminated by extracting process.The distinction ΔS₂ is used to correct the heavy hydrocarbon of S₁,and the correction coefficient increases with the increase of maturity.Assuming that the light and heavy hydrocarbons expel at the same rate during the hydrocarbon expulsion process,the ratio calculated with hydrocarbon generation kinetics theory is used to correct the light hydrocarbon of S₁.With the increase of maturity,the correction coefficient of light hydrocarbons first decreases and then increases.On the basis of evaluating the organic heterogeneity by logging,the enriched shale oil resource is classified,and its potential is evaluated by using the corrected S₁.The potential enriched shale oil resource is about 2.2×10⁸ t in E₂s⁴⁽²⁾ sub-member in the Damintun Sag,Liaohe Depression,Bohai Bay Basin.

Key words: shale oil, light and heavy hydrocarbon correction, Damintun Sag, Bohai Bay Basin

CLC Number:

TE122.1

Lu Shuangfang, Chen Guohui, Wang Min, Li Jinbu, Wang Xin, Shan Junfeng, Hu Yingjie, Mao Junli. Potential evaluation of enriched shale oil resource of Member 4 of the Shahejie Formation in the Damintun Sag, Liaohe Depression[J]. Oil & Gas Geology, 2016, 37(1): 8-14.

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Potential evaluation of enriched shale oil resource of Member 4 of the Shahejie Formation in the Damintun Sag, Liaohe Depression

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