Gas Well Completion Method Preferred

Along with big reserve volume natural gas field found, the development of natural gas field has been a hotspot research field. And gas well completion is a indispensability tache of joining the well drilling and gas production. It directly relations the quality of gas well, working life of gas well, whether the well can product gas and the big and small of off-take potential of gas well .It is the groundwork of gas well production. The first of all for well completion is the method selection. But at present the special research for the optimization of well completion method of gas well nearly has none. Due to a great deal of distinctiveness between gas well and oil well, it makes the research work more difficult. For this the paper carried through special research.This paper takes well completion method as optimizing object, from the point of view of well completion engineer, systematically anglicizing and weighting the well completion method. Detailedly and deepgoingly researched the relative merits and the adaptive geology condition of all of the well completion method, and the affecting factors, include: borehole stability of production process, whether sand flow in formation when producting, the characteristic of geology and gas reservoir engineering, downhole working, requirement of gas production engineering, etc. The optimizing for reasons given above guaranteed the optimized method satisfied all of the demands of engineering, and the use of weighted method to comprehensively consider all of the discriminate method and discriminate reference guaranteed the optimized result more accuracy and credibility. And then depended on binomial equation for calculate off-take potential of gas well , the disaggrega-tire calculate equation of skin factor and high speed hydraulic flow factor in all kinds of well completion method, through elaborate and detailed derivation, obtained the material deliverability equation for all kinds of gas well completion method in sandstone formation, carbonatite formation, fissure formation. And analyzed all of the factors, which effect the off-take potential of gas well. Once more according to the derivated deliverability equation carry through off-take potential analysis weighting. Finally synthesizing economic benefit carry through systemic appreciation, then optimized the reasonable gas well completion method.Aiming at all the study content the above, using Visual basic processed computer programme, developed the gas well completion method optimization software, and applying this software optimized the well completion method of west SICHUAN XU 2 gas formation.