| 摘要 |
<p>A method of calculating vertical depth in a well bore containing a well fluid comprises the steps of measuring the pressure of said well fluid at a first location P1 to produce a first pressure value, measuring the pressure of said well fluid at a second location P2 to produce a second pressure value, determining the difference in height between said first and second locations, calculating a fluid density value for said well fluid using said first and second pressure values and said difference in height, measuring the pressure of said well fluid at a third location Pbit to produce a third pressure value, determining a reference pressure Pstp, being the pressure of said well fluid at a reference location, determining the height of said reference location and calculating the vertical depth of said third location using said fluid density value, said third pressure value and said reference pressure.</p> |
