Xingcheng Volcanic Gas Reservoir Gas Well Productivity And Performance Research Of The Reservoir

Daqing deep volcanic gas reservoir is typical of big difference of permeability, severityinhomogeneous, complexity distribution of gas/water, pore structure complexity, rock typepeculiar, lithology complexity, so we can conclude that it has special characteristic anddifficulty in production quite different from normal gas reservoir. Nowadays, the number ofvolcanic gas reservoir witch has been found in the world is numbered, can not come intobeing some method and experience used for reference, so we must know volcanic gasreservoir more, develop gas well productivity and performance description of the reservoirresearch, also offer performance prediction of Daqing volcanic gas reservoir abundancetechnical foundation and sort the favorable development, which establish excellentfoundation for the expedition of production, and the wise adoption of development project.Hence this paper study Xingcheng volcanic gas reservoir gas well productivity andperformance research of the reservoir, specific study content as follows:At first, this thesis discuss the flow principle of gas through porous media forhomogeneous gas reservoir, then, we review conventional gas well productivity analysismethods. At present, all the gas well productivity analysis method need to ascertain theabsolute open flow potential;thus need a stable test pot. In fact, it is impossible to get stable.Most of all the geologic condition is so complicated. So we study the method ofdetermination gas well productivity by transient gas well testing, on the foundation of above,this thesis deduce gas well variable production rate binomial deliverability equation forhomogeneous gas reservoir, and put forward corresponding gas well productivity analysismethod and the calculation method of practical open flow potential.Second, through processing Xingcheng gas reservoir practical testing data, themanagement results show that the new method is properly reliable. The new method do notneed stable test, so we can save vast test time and test expense, which bring immediateeconomic benefit and have no infection on the gas oilfield production when we test theproductivity, accordingly we can test more well, which can bring indirect economic benefitThird, using gas well early stage well testing and production test pressure data,combination reservoir static geologic cognizance to study reservoir permeability characterand throughgoing pattern, also evaluate gas well productivity, rate maintenance capabilityand well control reserves, establish performance model of the reservoir witch can predictdevelopment performance of gas well. Xingcheng gas reservoir lithology is volcanic andconglomerate in north of Songliao basin, at present is on the exploration and developmentstage. Gas well initial productivity is very difference seeing from well testing and productiontest condition of some finishing drilling exploration wells and appraisal wells, the maxproduction can be hundreds of thousands cubes, the min production can just be million ofcubes, pressure behavior is varying, gas reservoir showing serious complexity. Correctlyevaluation gas well productivity and rate maintenance capability is the key question ofachieving fast and high efficiency development.