The Characteristic Of Chang6 Reservior In Qingcheng Area

The characteristic of Chang6 reservior in Qingcheng Area are systematically studied in this paper, using integrated knowledge and techniques of reservior geology, logging geology, geological statistics, structural geology and reservior engineering, based on detailed description and observation of drilling cores, and various analytical and measurement methods including identification and quantitative statistics of thin sections under microscope,computer image grain size analyses of X-ray diffraction.The area conducted any of regional tectonics,sedimentary characteristics and sand body distribution and stratigraphic correlation,sedimentary microfacies and oil-bearing series differentiate, reservoir property and heterogeneity, pore type and pore structure, fluid properties analysis and calculation of reserves.Research show that Area of Chang 6 reservoir mainly is a set of turbidite channel sand body. Powder- fine grained feldspathic lithic sandstone is the main rock type of the reservoir, besides,the reservoir rock compositional maturity is low and textural maturity is medium; reservior space is mainly intergranular pore,followed by feldspar dissolution pore,pore structure is mainly small pore and fine throat and micro throats. The reservior is mainly tectonic lithologic reservior which is with better properties,good connectivity,thin reservior,small area.This belongs to low porosity and low permeability reservior. The reservior belongs to medium-strong heterogeneity reservior,and mainly positive rhythm. During the period of Chang 63, the reservoir is mainly in the class II and class III. Research above provides geological basis for reasonable and effective development of the Chang6 reservoir.