Volcanic Gas Reservoir Dynamic Reserves Evaluation And Research Of Potentiality Of The Infilled Adjustment

XS1 block is a typical volcanic gas reservoir,production began in December 2004, block productivity at the end of 2011 by 7.9×108m3/a in the early fall to 7.0×108m3/a, Twelfth Five-year Plan period Stable yield pressure is large.By the end of may, 2012, XS1 block cumulative gas production is 24.17×108m3, Recovery Percent is only 7.76%. The producing Geological Reserves of XS1 block design is 311.34×108m3, Well control the dynamic reserves calculation of 115.78×108m3only account for 37.72% of the design producing geological reserves, visible infilled adjustment of its feasibility, preliminary think implementation ways to stabilize XS1 main consideration is to improve the single well production capacity and drill capacity to replace well,namely the infill well.Methods for improving the productivity of single well is mainly considerate before the conglomerate reservoir, it can or cannot deploy infill well, needs further demonstrates its feasibility from the aspects of geology and gas reservoir engineering.In this paper, by comparing the commonly used methods calculating the gas well dynamic reserves, and have optimized output instability analysis(Blasingame method), with the aid of F.A.S.T.RTA software,by means of XS1 block wells, historical production data, this paper fitted out all wells, dynamic reserves in this block, and by volumetric method take advantage of every wells, dynamic reserves deduced equivalent radius, the gas wells, average equivalent control radius is 371 m;In combination with gas wells,connectivity:XS1-201 and XS6-105, XS6-205, XS6-107, XS6-208 are disconnected, XS1 and XS1-3, XS1-X202 are disconnected, XS1 and XS1-203 May be connecte.Considering the equivalent control of radius,gas recovery rate, economic benefit and fracturing size etc, XS1 block reasonable well spacing should be:Good connectivity and good fracturing effect area is 620m-690 m, poor connectivity and poor fracturing effect area is 420m-560m;Gas reservoir given water dynamic XS1 block average water/gas ratio at present is 0.4m3/104m3,calculate the abandonment formation pressure of 36 wells under the condition of not charging an average of 9.5 MPa,under the condition of charging an average of 6.5 MPa,determined the potentiality area of the infilled adjustment and develop the volcanic gas reservoir gas Wells in XS1 block encryption adjustment implementation process.