In allusion to the problems that the factors of affecting oil
and gas well sidewall stability are too many and to distinguish it is
difficult ,by the synthetic analysis to the factors of affecting oil
and gas well sidewall stability and incorporating the different oil
and gas well engineering practice circumstances ,the article bring
forward utilizing multistage fuzzy comprehensive evaluation to
judge oil and gas well stability ,and using the example to expound
it detailedly to the methodological handling course. The method
enhances the hole stability analytical prediction scientificalness or
stabilization and may be used easily , it overcomes the defect
depending on experience to judge hole stability ,and provides a
new means to judge the stability of well in operation for the site
operation decision makers.
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