Prediction Changes in Well Bottom Fluid Conditions from Well Head Measurements

Abstract

In order to investigate the behavior of the reservoir during production and the effects of reinjectim of separated water on production wells in the Otake geothermal area, changes with time in fluid conditions at the wellbottom and feed point in the reservoir for Otake production wells, 0-7, 0-9 and 0-70, were predicted from wellhead measurements. For the purpose of that, initially, changes in the wellbottom pressures Pb for each well were predicted. Secondly, on the basis of the predicted Pb, the water saturation S and fluid enthalpy in place at the feed point H, were estimated.