Estimating of equilibrium formation temperature by curve fitting method and it's problems
Determination of true formation temperature from measured bottom hole temperature is important for geothermal reservoir evaluation after completion of well drilling. For estimation of equilibrium formation temperature, we studied non-linear least squares fitting method adapting the Middleton Model (Chiba et al., 1988). It was pointed out that this method was applicable as simple and relatively reliable method for estimation of the equilibrium formation temperature after drilling. As a next step, we are studying the estimation of equilibrium formation temperature from bottom hole temperature data measured by MWD (measurement while drilling system). In this study, we have evaluated availability of nonlinear least squares fitting method adapting curve fitting method and the numerical simulator (GEOTEMP2) for estimation of the equilibrium formation temperature while drilling.
- Research Organization:
- Geothermal Energy Research and Development Co., Ltd., Tokyo, JP
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 889124
- Report Number(s):
- SGP-TR-147-10
- Resource Relation:
- Conference: Proceedings, nineteenth workshop on geothermal reservoir engineering, Stanford University, Stanford, CA, January 18-20, 1994
- Country of Publication:
- United States
- Language:
- English
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