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Title: Optimizing fracture stimulation using treatment-well tiltmeters and integrated fracture modeling

Abstract

This paper covers the optimization of hydraulic fracture treatments in a new coalbed methane (CBM) reservoir in Wyoming. A multiwell pilot project was conducted in the Copper Ridge (CR) field to assess future development potential. Hydraulic fracture mapping was successfully performed with treatment-well tiltmeters on six wells including the first-ever used on propped treatments. The mapped fracture height was then used to calibrate the fracture model, perform on-site fracture-design changes, and optimize future fracture treatments. This paper shows how early use of fracture diagnostics can assist in the development of a new reservoir.

Authors:
; ; ;  [1]
  1. Pinnacle Technology Houston, Houston, TX (United States)
Publication Date:
OSTI Identifier:
20790910
Resource Type:
Journal Article
Resource Relation:
Journal Name: SPE Production and Operations; Journal Volume: 21; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; METHANE; COAL DEPOSITS; WYOMING; USA; HYDRAULIC FRACTURING; MAPPING; HYDRAULIC FRACTURES; OPTIMIZATION

Citation Formats

Mayerhofer, M., Stutz, L., Davis, E., and Wolhart, S. Optimizing fracture stimulation using treatment-well tiltmeters and integrated fracture modeling. United States: N. p., 2006. Web. doi:10.2118/84490-PA.
Mayerhofer, M., Stutz, L., Davis, E., & Wolhart, S. Optimizing fracture stimulation using treatment-well tiltmeters and integrated fracture modeling. United States. doi:10.2118/84490-PA.
Mayerhofer, M., Stutz, L., Davis, E., and Wolhart, S. Mon . "Optimizing fracture stimulation using treatment-well tiltmeters and integrated fracture modeling". United States. doi:10.2118/84490-PA.
@article{osti_20790910,
title = {Optimizing fracture stimulation using treatment-well tiltmeters and integrated fracture modeling},
author = {Mayerhofer, M. and Stutz, L. and Davis, E. and Wolhart, S.},
abstractNote = {This paper covers the optimization of hydraulic fracture treatments in a new coalbed methane (CBM) reservoir in Wyoming. A multiwell pilot project was conducted in the Copper Ridge (CR) field to assess future development potential. Hydraulic fracture mapping was successfully performed with treatment-well tiltmeters on six wells including the first-ever used on propped treatments. The mapped fracture height was then used to calibrate the fracture model, perform on-site fracture-design changes, and optimize future fracture treatments. This paper shows how early use of fracture diagnostics can assist in the development of a new reservoir.},
doi = {10.2118/84490-PA},
journal = {SPE Production and Operations},
number = 2,
volume = 21,
place = {United States},
year = {Mon May 15 00:00:00 EDT 2006},
month = {Mon May 15 00:00:00 EDT 2006}
}
  • The geothermal reservoir well stimulation program (GRWSP) group performed a large hydraulic fracture treatment in the well Baca 20, located in the Union Geothermal Co. of New Mexico Redondo Creek project area in north-central New Mexico. This is the highest temperature well in the world to be successfully fractured with proppant to date. The treatment involved use of a large cooling water prepad followed by a highviscosity fracturing fluid carrying sintered bauxite as the proppant. A nonproductive 240-ft (73-m) openhole interval, with a formation temperature of 520/sup 0/F (271/sup 0/C), was selected and isolated for the job. Poststimulation tests andmore » analyses indicate a fracture was successfully created with a large vertical height near the wellbore. A number of fracture evaluation techniques were used to analyze the job, including some that are unique. Among these techniques were fracture mapping by monitoring the microseismic events caused by the fracture job, downhole treating pressure data analysis, temperature profiles, electric log surveys, production tests, and chemical tracer monitoring. The poststimulation fluid productivity of the treated interval was subcommercial, probably because of low formation permeability surrounding the artificially created fracture.« less
  • Well Stimulation Experiment No. 5 of the Geothermal Reservoir Well Stimulation Program (GRWSP) was performed on March 22, 1981 in Baca 23, located in Union's Redondo Creek Project Area in Sandoval County, New Mexico. The treatment selected was a large hydraulic fracture job designed specifically for, and utilizing frac materials chosen for, the high temperature geothermal environment. The well selection, fracture treatment, experiment evaluation, and summary of the job costs are presented herein.
  • The U.S. Department of Energy-sponsored Geothermal Reservoir Well Stimulation Program was initiated in February 1979 to pursue industry interest in geothermal well stimulation work and to develop technical expertise in areas directly related to geothermal well stimulation activities. This report provides an overview of the two experiments conducted in the high-temperature reservoir in Baca, New Mexico. The report discusses resource and reservoir properties, and provides a description of the stimulation experiment, a description of the treatment evaluation, and a summary of the experiment costs. (DJE-2005)
  • Conventionally, proper well spacing and stimulation govern the economic attractiveness of producing natural gas from coalbeds. To provide an analytical foundation for this empirical evidence, reservoir simulation and economic analyses were conducted to gain insights into the optimum well spacing and hydraulic-fracturing treatments in typical good and poor geologic settings of the Oak Grove field in Alabama. The authors report their study of the economic benefit of gel-based fracturing treatments, the optimal well spacing for higher- and lower-permeability settings, and how to establish proper values for permeability and achievable hydraulic-fracture dimensions for optimal well spacing.
  • Careful evaluation of the reasons for stimulating a well, and determination of the possibility of success are important before any expenditures are made. Oil and gas wells are generally stimulated for one or more of the following reasons: (1) get a faster return on investment; (2) improve ultimate recovery; and (3) decrease drawdown at the sand face for more efficient use of reservoir energy. Among the technical reasons for stimulation are the low permeability of formations and the need to offset the ill effects of well-bore damage. In selecting a well for stimulation treatment, information is needed about the mechanicalmore » condition of the well, reservoir energy, well- bore condition, formation characteristics, and reservoir performance generally. Stimulation treatments are divided into 2 major categories-- deep far-reaching treatments and shallow or well-bore treatments. Whatever treatment is used, future life of the reservoir should be considered. (11 refs.)« less