Title: Enrichment of the paleogene L Reservoir in Laojunmiao Oilfield of Jiuxi Basin
Abstract: Laojunmiao Oilfield is located in the center of Laojunmiao anticline of the Jiuxi Basin,which is a advanced foreland basin.The grainsize sorting and psephicity of the L reservoir is poor,and the maturation of composition and structure is low,the main content of cement are shale and calcium,so the L reservoir is a good reservoir,with mid-high porosity and middle permeability.Based on the classification mark about sedimentary facies,including core observation,outcrop,drilling,logging and so on,the L reservoir can be divided into 2 sedimentary facies and 3 sedimentary subfacies,the facies are fluvialite and delta facies,the subfacies are braided fluvial and delta plain,delta front.The upper of the L reservoir deposited regional brown-red mudstone caprocks of Shiyougou formation,the sandbody of L1 and L2,L3 formed anticline reservoir due to the folding,there is structural-lithologic reservoir in the west,the tectonic settings of controling migration and accumulation are the geological background of accumulation,the physical property features of diagenesis reservoir are the premises of accumulation,the sedimentary facies which control the quality development of the reservoir are the necessary conditions of accumulation,the well assemblage for source-reservoir-cap is the key to accumulation.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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