The Department of Energy's Western Gas Sands Project Multi-Well Experiment

Atkinson, Charles M.; Northrop, D. C.; Mann, Robert B.

doi:10.2523/9891-ms

Cited by 8 publications

(3 citation statements)

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“…(1) determine the depositional environment as a guide to overall reservoir morphology; (2) estimate the m~n~mum, mode, imd maximum values for the expected reservoir widths, thicknesses, lengths, and directions based upon best available data (or estimates); and (3) perform a Monte Carlo simulation of the intersection of a hydraulic fracture of known orientation (azimuth) and geometry with a large number of random reservoirs described by (2). This yields a plot of the average intersected pay area, with quantified uncertainty, as a function of fracture length.…”

Section: Hydraulic Fracturingmentioning

confidence: 99%

Insights Into Natural Gas Production From Low-Permeability Reservoirs

Northrop¹

1988

Proceedings of SPE Gas Technology Symposium

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Insights have been gained into natural gas production from low permeability sandstone reservoirs in the western United States as a result of the U.S. Department of Energy's Multiwell Experiment (MWX).Three wells, between 110 and 215 ft (34-66 m) apart at depth, have been drilled at a site southwest of Rifle, Colorado, in the Piceance Basin, where the Cretaceous-age Mesaverde lies at a depth of 4,000 to 8,250 ft (1220-2520 m). Activities have been conducted in the lowermost Corcoran-Cozzette marine sandstones and in the overlying paludal, coastal, and fluvial nonmarine intervals.Insights include:(1) the depositional environment controls reservoir morphology, size, internal structure, and natural fracturing; thus, it must be discerned in order to optimize completions and interpret reservoir performance; ( 2) natural fractures, even if small and mineralized, are the dominant production mechanism in these, and probably most other, very tight reservoirs; ( 3) breakdowns and extended cleanup and test times are required for accurate reservoir assessment; (4) effectiveness of hydraulic fracturing appears limited by an anisotropic natural fracture system, high fracturing pressures, accelerated leakoff, and damage to the natural fracture system; and (5) in situ stress behavior varies with depth and lithology, is complex, and significantly affects stimulation and gas production.

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Section: Hydraulic Fracturingmentioning

confidence: 99%

Insights Into Natural Gas Production From Low-Permeability Reservoirs

Northrop¹

1988

Proceedings of SPE Gas Technology Symposium

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“…2 CURRENT STATUS OF THE MULTI-WELL EXPERIMENT SPE 12868 The intent of th1s paper 1s to present current accomplishments resulting from the 1983 field season (April-December 1983), which featured the drilling of a third well and the first stimulation activity at the site. This paper is an update to the last report presented in Denver, March 1983.…”

Section: Introductionmentioning

confidence: 99%

Current Status of the Multiwell Experiment

Northrop

Sattler

Mann³

et al. 1984

Proceedings of SPE Unconventional Gas Recovery Symposium

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The Multi-Well Experiment (MWX) is a researchoriented field laboratory whose objective is to develop the understanding and technology to allow economic production of the several years supply of natural gas estimated to be within the low permeability, lenticular gas sands of the Western United States. Features of MWX include: (1) three closely-spaced wells (115-215 ft, 35-66 m) for reservoir characterization, interference testing, well-to-well geophysical profiling, and placement of diagnostic instrumentation adjacent to the fracture treatment; (2) complete core taken through the formations of interest; (3) a comprehensive core analysis program; (4) an extensive logging program with conventional and experimental logs; (5) determination of in situ stresses in sands and bounding shales; (6) use of various seismic surveys and sedimentological analyses to determine lens morphology and extent; (7) use of seismic, electrical potential, and tilt diagnostic techniques for hydraulic fracture characterization; and (8) a series of stimulation experiments to address key questions. This paper presents the current MWX accomplishments resulting from the 1983 field season which featured the drilling of a third well and the first stimulation experiment.

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“…This systems approach to analyzing the experiments demonstrated that fracture fluid compatibility with the stimulated formation, and the possible effects of formation damage, plays a large part in the performance of hydraulic fracturing in tight naturally fractured sandstones. 9. The cutting of more than 4, 100 ft [1250 m] of core at one site presented an opportunity to evaluate the performance of coring hardware.…”

mentioning

confidence: 99%

The Multiwell Experiment - A Field Laboratory in Tight Gas Sandstone Reservoirs

Northrop

Frohne

1990

Journal of Petroleum Technology

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The U.S. DOE's Multiwell Experiment (MWX) was a field laboratory aimed at improved characterization and gas production from low-permeability reservoirs typified by the Mesaverde Group in western Colorado. A broad spectrum of activities was conducted over 8 years at a site containing three closely spaced « 225 ft [ < 68 m]), deep (7,550 to 8,350 ft [2300 to 2550 m])wells. The results yielded insights and contributions into the technology of gas production from this resource.

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The Department of Energy's Western Gas Sands Project Multi-Well Experiment

Cited by 8 publications

References 0 publications

Insights Into Natural Gas Production From Low-Permeability Reservoirs

Insights Into Natural Gas Production From Low-Permeability Reservoirs

Current Status of the Multiwell Experiment

The Multiwell Experiment - A Field Laboratory in Tight Gas Sandstone Reservoirs

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