Sedimentary facies characteristics and source rocks evaluation of Mesoproterozoic Hongshuizhuang Formation in Lingyuan area,western Liaoning
Based on the cores,field sections,thin sections and organic geochemical data,the sedimentary facies characteristics of the Mesoproterozoic Hongshuizhuang Formation and the evaluation of source rocks were carried out.The results show that the Mesoproterozoic Hongshuizhuang Formation is mainly deposited by trough facies and carbonate plat-form facies,the bottom-up low-level system tract is mainly composed of deep-water trough facies and shallow shelf facies sedimentation,the transgression system tract is mainly composed of deep-water trough facies and deep-water slope facies sedimentation,and the high-level system tract is mainly composed of deep-water gentle slope and tidal margin shore beach facies deposits.The average abundance of total organic carbon in the source rocks of Hongshuizhuang Formation was 4.75％and(S1+S2)was 6.9 mg/g,which were generally good-very good source rocks,and the organic matter types were mainly Ⅰ-Ⅱ1 type kerogen with great oil production potential,and the average Tmax was 438.3 ℃ and the kerogen was brown,indicating that it was in the stage of mature oil production.On the whole,the trough facies black mudstone in the low-level system and transgression system tracts has great oil and gas potential,which is the focus of the next exploration and research.
sequence divisionsedimentary facies characteristicssource rock evaluationHongshuizhuang FormationLingyuan area
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万方数据
