The Characteristic Of P_1s2 Reservoir And Deliverability Study Of South Of Yulin Gas Field In Ordos Basin

Reservoir is defined as a place to accumulate oil and gas or a object of hydrocarbon bearing pool empoldering,which is focused by oil & gas explore engineer invariably.Different quality of reservoir directly effects gas well deliverability,setting explore tractic,explore result and final recovery radio.Based on the past study,the thesis analyzes sedimentary facies,sand body and reservoir of P₁s₂ of the south of Yulin in further step,by way of lithologic character,physical property,electric nature and the testing data.Meanwhile,detail the character of deliverability and sum up the relation between reservoir and deliverability in the thesis.Hereby,it is valuable for future gas and oil reconnoitering and empoldering.The sedimentary facies of P₁s₂ reservoir is formed by braided distributary channel sediment and developing intrafacies of delta plain in general.Sand body remains in banded distribution from north to south.North part is thick while south part thin.By extending to east and west ends the sand body becomes thin or piching,nevertheless it has good connectedness in all.In the study areas,reservoir mainly develop quartz sandstone,lithic quartz sandstone and lithic sandstone.The reservoir space contain intergranular pore,intercrvstal pore,emposieu and so on.The reservoir is part of close sand reservoir with low-porosity and low permeable sublayer.Porosity ranges from 1-15%,averaged at 5.44%.Permeability ranges from 0.0037-234×10^-3μm²,averaged at 7.48×10^-3μm².The samples with permeability more than 10×10^-3μm² only number 12%of all.In conclusion the reservoir has bad pore configuration and strong heterogeneity.Net gas keeps main part of gas pool.In southwest a little edge water is discovered with about-1785m gas/water contact(GWC).P₁s2_<sup>3 is the leading gas pay which is effected by geofactor,such as sedimentary facies,sand body thickness,physical property,heterogeneity and so on.Deliverability of every well varies in wide discrepancy.The most is 156.17×10⁴ m³/d while the least is 0.22×10⁴ m³/d.