Coal powder concentration warning and control measure during CBM well drainage
Abstract：In order to solve the problem of coal powder interference in coalbed methane（CBM） well drainage,which causes gas production fluctuation even stuck pump frequently,the source and form mechanism of coal powder were analyzed.Based on the monitoring data of CBM well in Ordos Basin,the coal powder concentration warning index was presented.Sieve tube were used to avoid large particle get into pump,and water were injected from tubing-casing annular space to dilute coal powder concentration.The field application results demonstrate the coal powder control measure can reduce the coal powder concentration into production well,and can extend the pump inspection cycle of CBM well.
Keywords：coalbed methane（CBM）horizontal wellcoal powder concentrationstuck pump
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)