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Title: Design Considerations for Artificial Lifting of Enhanced Geothermal System Fluids

Abstract

This work evaluates the effect of production well pumping requirements on power generation. The amount of work that can be extracted from a geothermal fluid and the rate at which this work is converted to power increase as the reservoir temperature increases. Artificial lifting is an important issue in this process. The results presented are based on a configuration comprising one production well and one injection well, representing an enhanced geothermal system. The effects of the hydraulic conductivity of the geothermal reservoir, the flow rate, and the size of the production casing are considered in the study. Besides submersible pumps, the possibility of using lineshaft pumps is also discussed.

Authors:
; ; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
911240
Report Number(s):
INL/EXT-05-00533
TRN: US200724%%600
DOE Contract Number:
DE-AC07-99ID-13727
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
15 - GEOTHERMAL ENERGY; CONFIGURATION; DESIGN; FLOW RATE; GEOTHERMAL FLUIDS; GEOTHERMAL SYSTEMS; HYDRAULIC CONDUCTIVITY; INJECTION WELLS; POWER GENERATION; PRODUCTION; PUMPING; RESERVOIR TEMPERATURE; artifical lifting; fluids; geothermal

Citation Formats

Xina Xie, K. K. Bloomfield, G. L. Mines, and G. M. Shook. Design Considerations for Artificial Lifting of Enhanced Geothermal System Fluids. United States: N. p., 2005. Web. doi:10.2172/911240.
Xina Xie, K. K. Bloomfield, G. L. Mines, & G. M. Shook. Design Considerations for Artificial Lifting of Enhanced Geothermal System Fluids. United States. doi:10.2172/911240.
Xina Xie, K. K. Bloomfield, G. L. Mines, and G. M. Shook. Fri . "Design Considerations for Artificial Lifting of Enhanced Geothermal System Fluids". United States. doi:10.2172/911240. https://www.osti.gov/servlets/purl/911240.
@article{osti_911240,
title = {Design Considerations for Artificial Lifting of Enhanced Geothermal System Fluids},
author = {Xina Xie and K. K. Bloomfield and G. L. Mines and G. M. Shook},
abstractNote = {This work evaluates the effect of production well pumping requirements on power generation. The amount of work that can be extracted from a geothermal fluid and the rate at which this work is converted to power increase as the reservoir temperature increases. Artificial lifting is an important issue in this process. The results presented are based on a configuration comprising one production well and one injection well, representing an enhanced geothermal system. The effects of the hydraulic conductivity of the geothermal reservoir, the flow rate, and the size of the production casing are considered in the study. Besides submersible pumps, the possibility of using lineshaft pumps is also discussed.},
doi = {10.2172/911240},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 2005},
month = {Fri Jul 01 00:00:00 EDT 2005}
}

Technical Report:

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  • This report summarizes the progress made during the April 01, 2010 – December 30, 2013 period under Cooperative Agreement DE-EE0002752 for the U.S. Department of Energy entitled “High-Temperature-High-Volume Lifting for Enhanced Geothermal Systems.” The overall objective of this program is to advance the technology for well fluids lifting systems to meet the foreseeable pressure, temperature, and longevity needs of the Enhanced Geothermal Systems (EGS) industry for the coming ten years. In this program, lifting system requirements for EGS wells were established via consultation with industry experts and site visits. A number of artificial lift technologies were evaluated with regard tomore » their applicability to EGS applications; it was determined that a system based on electric submersible pump (ESP) technology was best suited to EGS. Technical barriers were identified and a component-level technology development program was undertaken to address each barrier, with the most challenging being the development of a power-dense, small diameter motor that can operate reliably in a 300°C environment for up to three years. Some of the targeted individual component technologies include permanent magnet motor construction, high-temperature insulation, dielectrics, bearings, seals, thrust washers, and pump impellers/diffusers. Advances were also made in thermal management of electric motors. In addition to the overall system design for a full-scale EGS application, a subscale prototype was designed and fabricated. Like the full-scale design, the subscale prototype features a novel “flow-through-the-bore” permanent magnet electric motor that combines the use of high temperature materials with an internal cooling scheme that limits peak internal temperatures to <330°C. While the full-scale high-volume multi-stage pump is designed to lift up to 80 kg/s of process water, the subscale prototype is based on a production design that can pump 20 kg/s and has been modified for high-temperature operation. In parallel with the design and fabrication of the subscale prototype ESP system, a subscale test facility consisting of a high-temperature-high-pressure flow loop was designed, fabricated, and installed at GE Global Research in Niskayuna, NY. A test plan for the prototype system was also established. The original plan of testing the prototype hardware in the flow loop was delayed until a future date.« less
  • Design considerations are described for energy conversion systems for low and intermediate temperature sensible heat sources such as found in geothermal, waste heat, and solar-thermal applications. It is concluded that the most cost effective designs for the applications studied did not require the most efficient thermodynamic cycle, but that the efficiency of the energy conversion hardware can be a key factor.
  • This supporting document details calculations completed to properly design an adjustable lifting beam. The main use of the lifting beam is to hoist the Data Acquisition and Controls Systems (DACS) trailer over a steam line. All design work was completed using the American Institute of Steel Construction, Manual of Steel Construction (AISC, 1989) and Hanford Hoisting and Rigging Manual (WHC, 1992).
  • The two-phase flow system is analyzed as it develops and changes in the well. The product of the study will be a calculational technique to allow the design of geothermal wells in two-phase flow. The overall approach to the project is summarized, and the nature of the two-phase flow problem is discussed. The various elements of the program are presented. (MHR)
  • An attempt is made to develop a calculational procedure for both the analysis and the design of geothermal wells that are producing a two-phase mixture of steam and brine. Because of limitations in the available data base, part of the program calls for actual field measurement of two-phase flow parameters in producing geothermal wells. New instrumentations to provide real-time readout at the surface of the downhole temperatures and pressures are being designed and fabricated. A program for dundamental understanding of vertical two-phase flow has been initiated. An attempt will be made to correlate the results obtained in all previous phasesmore » and develop an analysis and design procedure usable by industry. (MHR)« less