Vapor mass ratio measurements in geothermal production wells
Measurements in geothermal wellbores are very difficult because of the high-fluid pressures, high borehole temperatures, and limited data transmission links. Here the extraneous effects on transducers and associated signal conditioning are very difficult to eliminate and if not carefully controlled may be the only variables measured. All the effects of these severe environments are not found in textbooks but come primarily through experience. Calibration of all transducers and instruments under simulated environmental conditions is absolutely essential. All materials and equipment used in the instrumentation systems must be carefully chose, well understood and properly used. The time and effort spent in good planning and preparation will greatly increase the probability of meaningful data processing and prove to be much more efficient. The applications of conscientious calibration methodology together with applicable data analysis can result in very meaningful information concerning fluid flow in geothermal wells. Recently a number of geothermal production wells were logged using a high-temperature spinner/temperature/pressure (STP) tool developed under the Hot Dry Rock Geothermal Energy Program. To determine the thermodynamics state of the flowing wellbore fluid when the fluid can be in both the liquid and/or vapor state, absolute values of temperature and pressure are necessary. Consider, for example, the analysis of data obtained from one particular well, PGM-10, where the fluid flow was reported to be 21 kg/sec and the fluid temperatures at the surface was 240/sup 0/C.
- Research Organization:
- Los Alamos National Lab., NM (USA); Lawton and Associates, Santa Fe, NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6239556
- Report Number(s):
- LA-UR-87-2006; CONF-871024-6; ON: DE87011774
- Resource Relation:
- Conference: Annual meeting of the Geothermal Resources Council, Sparks, NV, USA, 12 Oct 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Comprehensive Statistically-Based Method to Interpret Real-Time Flowing Measurements
AN INVESTIGATION OF WELLBORE SCALING AT THE MIRAVALLES GEOTHERMAL FIELD, COSTA RICA