PRODUCTION EFFECTIVENESS ANALYSIS OF T_3 x~2 RESERVOIR IN PINGLUOBA GAS FIELD
Li Rujin(Nourthwest Sichuan Mining District of SPA).NATUR.GAS IND.v.20,no.2,pp.74～76,3/25/2000.(ISSN 1000 0976;In Chinese)
The T 3 x 2 reservoir of Pingluoba gas field belongs to the gas reservoir of fault structural trap surrounded with edge water.The original formation pressure of the gas reservoir is 42.156 MPa and its formation temperature 100 16℃;the burial depths of reservoir bed are 3 419.00～ 3 845 00 m and reservoir rocks are composed of the fine medium particle feldspathic quartzose sandstones,lithic sandstones and arkoses;petrophysical properties are as follows:average porosity is 3.42%,average permeability 0.161 8×10 -3 μm 2 and heterogeneous coefficients 44 14～494 53;and fractures are developed in reservoir,well test interpreted permeabilities being 54 56～2 072 77 the size of core permeabilities,so the reservoir belongs to pore fracture type reservoir.The T 3 x 2 gas reservoir was put into production in 1990.Through several comprehensive researches and producing for many years,it is proved that the T 3 x 2 gas reservoir is of an unified hydrodynamic system and of an inactive edge water;and the original formation pressures in gas wells possess the property of initial pressure drop which indicates the connectivity of the reservoir is very good.The methane content in natural gas is 96 0%～97 0% and its relative densities 0 570～0 575.The natural gas doesn′t contain hydrogen sulfide,being of a fine quality.Estimated by use of various methods,the natural gas reserves in the reservoir are tens of billions with a relative error of 0 29%.Through producing and well testing for many times in existent 11 gas producing wells,the gas productivity of the reservoir is relatively high.The T 3 x 2 gas reservoir is one of the reservoirs with considerable reserves and high reserve abundances.
【CateGory Index】： TE37