Chuankou Southeast District6Sedimentary Microfacies Of Reservoir Characteristics And Research

This thesis is to the southeast of sichuan mouth area to extend the leader of the study ofsedimentary microfacies of6, is of yanchang formation in ordos basin formed after the first setof reservoir rock series, in refer to a large number of regional geological data in the study areaand absorbing predecessors research results foundation, viewing the cores in cored Wells ofthe study area as well as the description, core analysis assay data and logging data as thefoundation, in combination with drilling, field section and logging data, on the basis of thetheory of sedimentology, petroleum geology and geophysics, extended system all aspects ofresearch Chuankou oilfield group leader of6reservoir sedimentary system characteristics,xingtai, sand body distribution and sedimentary microfacies, reservoir characteristics andreservoir distribution.Extension set is bounded by north latitude38°about, coarse north south, north souththick, thin thickness of about100~100m north, south of1000~1300m thick, edgesubsidence downwarping maximum thickness of about3200m. Generally divides theextension of the group is divided into top-down long61,62,63,64, long long long comparedwith40profile in a study area, the east-west section18, north and south direction is22,stratigraphic distribution has a certain continuity, the thickness of sedimentary overall havegradually thickening trend from north east to southwest, but not change much.By kawaguchi southeast district6reservoir of casting slice data and the result of scanningelectron microscope, chang6reservoir development mainly lithic arkose, filler content such ascalcite carbonate and kaolinite, water mica, chlorite and other authigenic clay mineral, rockstructure middle maturity levels. Main pore types of intragranular dissolved pore, andintergranular pore and micro cracks, local visible intergranular pore, pore structure types isgiven priority to with the hole, containing a certain amount of big hole.To Chuankou southeast long6factors such as strata, structure are studied systematically,pay special attention to strengthening extend leader six sedimentary facies research, proposedin chang6reservoir of oil and gas enrichment regularity, through core observation, oilfield development status quo of tracer test results that the chang6reservoir cracks is given priorityto with east-west, at the same time have the characteristics of diversity.