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Facies logging identification of intermediate-basic volcanic rocks in Huoshiling Formation of Songliao Basin

Global Geology 2024年第2期27卷 93-104页

作者： LI Yonggang YAN Bo Northeast Oil and Gas Company SINOPECChangchun 130022China College of Earth Sciences Jilin UniversityChangchun 130061China

volcanic oil and gas reservoirs are generally buried deep,which leads to a high whole-well coring cost,and the degree of development and size of reservoirs are controlled by volcanic ***,accurately identifying volcanic facies by logging curves not only provides the basis of volcanic reservoir prediction but also saves costs during *** Songliao Basin is a‘fault-depression superimposed’composite basin with a typical binary filling *** types of volcanic lithologies and facies are present in the Lishu fault *** activity is frequent during the sedimentary period of the Huoshiling *** systematic petrographic identification of the key exploratory well(SN165C)of the Lishu fault-depression,which is a whole-well core,it is found that the Huoshiling Formation in SN165C contains four facies and six subfacies,including the volcanic conduit facies(crypto explosive breccia subfacies),explosive facies(pyroclastic flow and thermal wave base subfacies),effusive facies(upper and lower subfacies),and volcanogenic sedimentary facies(pyroclastic sedimentary subfacies).Combining core,thin section,and logging data,the authors established identification markers and petrographic chart logging phases,and also interpreted the longitudinal variation in volcanic petro-graphic response characteristics to make the charts more applicable to this area's volcanic petrographic interpretation of the Huoshiling *** charts can provide a basis for the further exploration and development of volcanic oil and gas in this area.

关键词： Lishu fault-depression Huoshiling Formation volcanic lithofacies logging identification whole-coring well SN165C

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