Stripped-Deficent Well Factors And Reasonable Working System In Jingbian Gas Field

Majiagou-51+2 gas reservoir of Jingbian gas field have serious heterogeneity and extensive flutings, some places have forming resident water. With the development of gas field,part of gas wells have becoming stripped-deficent well and the number is increasing year by year. In order to maximize the potential of stripped-deficent wells,for the purpose of efficient development and scientific management to Jingbian gas field.We need analysis of stripped-deficent well factors,find the reasonable working system.According to the stripped-deficent well characteristics we divide it into intermittent gas well, small production gas well and gas well with producting water. The causes of stripped-deficent well have been studied by analysis of gas reservoir geological datas and gas field development datas.It find that the primary reason for stripped-deficent well are production time and relative rich aquifer regions,the second reason are formation pressure, reservoir structure and peripheral propertie, the last reason is fluting.We aslo find that fluting, reservoir structure, peripheral propertie and production time to combined effect to intermittent gas well, production time is main factor to small production gas well, relative rich aquifer regions are the main factor to gas well with producting water.The reasonable working system aslo have been studied by analysis of dynamic datas,production test datas and a lot of statistical information.To study the intermittent working system we based on the rate of pressure recovery method, we aslo study continuous production to intermittent gas well by use the method of continuous production of low proration and single well booster; the results show that the intermittent working system can improve the efficiency of well production,continuous production of low proration can reduce the labor intensity, reduce the non-Darcy filtrate, the technology of single well booster can be test.To study working system of small production gas well, we calculate the drawdown equation and deliverability equation, to get reasonable proration we use three plans. the results show that the working system according to proration plans can guide the on-site production.To study working system of gas well with producting water, we study the recovery scheme by analysis of water production factors, and the amend critical liquids carrying flow rate model what fit for Jingbian gas field; by analysis of the tecniques of gas recovery by water drainage, and against their limitation we propose two tecniques. the results show that the reasonable recovery scheme and critical liquids carrying flow rate can extensive normal gas production, new tecniques are worth to deployment.