The screen horizontal well is a kind of important well type in coalbed methane exploitation,achieving breakthroughs in production in the development of shallow coalbed methane with high permea-bility.However,with the deterioration of reservoir geological conditions and the prolongation of gas well production time,some low-production screen horizontal wells have appeared in production practice.This paper discusses the causes of low production of coalbed methane screen horizontal wells from four factors:geological factor,drilling factor,production factor and operation factor.Low permeability of coal reser-voir,coal reservoir plugging and wellbore plugging are the three main reasons causing the low production in screen horizontal wells.The corresponding measures to increase production are developed for different reasons of low production.The techniques for increasing production have been well applied in Fanzhuang Block in the southern Qinshui Basin.
Screen horizontal wellcauses of low productionmeasures of treatmentprocess technology
NETL
NSTL
万方数据
