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Title: Field-project designs for carbon dioxide sequestration and enhanced coalbed methane production

Abstract

Worldwide concerns about global warming and possible contributions to it from anthropogenic carbon dioxide have become important during the past several years. Coal seams may make excellent candidates for CO{sub 2} sequestration; coal-seam sequestration could enhance methane production and improve sequestration economics. Reservoir-simulation computations are an important component of any engineering design before carbon dioxide is injected underground. We have performed such simulations for a hypothetical pilot-scale project in representative coal seams. In these simulations we assume four horizontal production wells that form a square, that is, two wells drilled at right angles to each other forming two sides of a square, with another pair of horizontal wells similarly drilled to form the other two sides. Four shorter horizontal wells are drilled from a vertical well at the center of the square, forming two straight lines orthogonal to each other. By modifying coal properties, especially sorption rate, we have approximated different types of coals. By varying operational parameters, such as injector length, injection well pressure, time to injection, and production well pressure, we can evaluate different production schemes to determine an optimum for each coal type. Any optimization requires considering a tradeoff between total CO{sub 2} sequestered and the ratemore » of methane production. Values of total CO{sub 2} sequestered and methane produced are presented for multiple coal types and different operational designs. 30 refs., 11 figs., 1 tab.« less

Authors:
; ; ; ;  [1]
  1. EG&G Technical Services, Morgantown, WV (United States). National Energy Technology Laboratory
Publication Date:
OSTI Identifier:
20688434
Resource Type:
Journal Article
Resource Relation:
Journal Name: Energy and Fuels; Journal Volume: 19; Journal Issue: 6; Other Information: sjikic@netl.doe.gov
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; FIELD TESTS; CARBON SEQUESTRATION; COAL SEAMS; METHANE; COMPUTERIZED SIMULATION; UNDERGROUND STORAGE; CARBON DIOXIDE

Citation Formats

W. Neal Sams, Grant Bromhal, Sinisha Jikich, Turgay Ertekin, and Duane H. Smith. Field-project designs for carbon dioxide sequestration and enhanced coalbed methane production. United States: N. p., 2005. Web. doi:10.1021/ef049667n.
W. Neal Sams, Grant Bromhal, Sinisha Jikich, Turgay Ertekin, & Duane H. Smith. Field-project designs for carbon dioxide sequestration and enhanced coalbed methane production. United States. doi:10.1021/ef049667n.
W. Neal Sams, Grant Bromhal, Sinisha Jikich, Turgay Ertekin, and Duane H. Smith. Thu . "Field-project designs for carbon dioxide sequestration and enhanced coalbed methane production". United States. doi:10.1021/ef049667n.
@article{osti_20688434,
title = {Field-project designs for carbon dioxide sequestration and enhanced coalbed methane production},
author = {W. Neal Sams and Grant Bromhal and Sinisha Jikich and Turgay Ertekin and Duane H. Smith},
abstractNote = {Worldwide concerns about global warming and possible contributions to it from anthropogenic carbon dioxide have become important during the past several years. Coal seams may make excellent candidates for CO{sub 2} sequestration; coal-seam sequestration could enhance methane production and improve sequestration economics. Reservoir-simulation computations are an important component of any engineering design before carbon dioxide is injected underground. We have performed such simulations for a hypothetical pilot-scale project in representative coal seams. In these simulations we assume four horizontal production wells that form a square, that is, two wells drilled at right angles to each other forming two sides of a square, with another pair of horizontal wells similarly drilled to form the other two sides. Four shorter horizontal wells are drilled from a vertical well at the center of the square, forming two straight lines orthogonal to each other. By modifying coal properties, especially sorption rate, we have approximated different types of coals. By varying operational parameters, such as injector length, injection well pressure, time to injection, and production well pressure, we can evaluate different production schemes to determine an optimum for each coal type. Any optimization requires considering a tradeoff between total CO{sub 2} sequestered and the rate of methane production. Values of total CO{sub 2} sequestered and methane produced are presented for multiple coal types and different operational designs. 30 refs., 11 figs., 1 tab.},
doi = {10.1021/ef049667n},
journal = {Energy and Fuels},
number = 6,
volume = 19,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}