GanGuYi-lin Zhen Of Foam Drainage Gas Recovery Technology Research

With gas well production gradually entered the later period,the water production of gas Wells will be severely increased,gas well production capacity will be greatly restricted,and part of the gas reservoir production time will be shorten.At this time if the situation can not be under control,the development of the gas reservoir recovery efficiency and the overall benefit will be depressed.According to the actual circumstance of GanGuYi-Linzhen gas field in the field and for the purpose of cost saving,foam drainage gas recovery is the most suitable for the drainage gas recovery technology.Therefore,in-depth study of foam drainage gas recovery technology has important practical significance.In this paper,the existing logging,drilling and production performance data of GanGuYi-linzhen gas field was collected,statistically analysed to establish a theoretical basis for the following foaming agent screening.Based on the experimental analysis,and in accordance with requirements of the foaming drainage technology,the foaming agentswere selected to adapt to the field of different salinity of three kinds of foaming agentHY-3 c,HY-3 g,HY3 k,and the corresponding foaming rods HY-5 c,HY-5 g,HY-5 k.At the same time defoaming agent for the foaming agent HY-X is got,too.In order to more accurately determine the wellbore fluid loading situation,the foaming agent injection timing,and injection cycle,several critical gas well liquid loading prediction model,which now is used more widely,was programed with general c#language.And by using actual data to choose the most suitable for the field model.The obtained calculation software also applied to other maj or gas field.The application of the foam drainage gas recovery technology shows that its effect is very obvious,the process implementation success rates reach 90%.And the effectiveness of the screened foaming agent,the foaming bar and the applicability of the defoaming agent on the field have been further prove.