Determination method of well killing occasion of pressing-back method for gas well
A method of determination, a technique for killing wells, applied in wellbore/well components, earthmoving, surveying, etc.
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[0043] The present invention will be further described below in conjunction with accompanying drawing 1.
[0044] As shown in Fig. 1, after the blowout of the high-yield gas formation encountered in gas drilling, the killing method of the present invention comprises the following steps:
[0045] 1. Collect formation and fluid physical parameters through geological logging data and adjacent well data
[0046] After a blowout occurs, the parameters including formation pressure, rock porosity, permeability, production layer thickness, gas density, gas viscosity, wellbore size and formation pressure boundary are obtained through mud logging data and adjacent well data.
[0047] 2. Draw the IPR curve at the bottom of the well
[0048] From the obtained formation and fluid parameters, the gas production q is plotted according to the following equation gs and bottom hole pressure p wf The inflow dynamics curve (IPR) of the relationship.
[0049] p ...
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