A Study of Reservoir Parameters Affecting Gas Well Spacing in West Virginia

Aminian, K.; Ameri, S.; Saradji, M.S.; Locke, C.D.

doi:10.2523/14517-ms

Cited by 7 publications

(3 citation statements)

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“…Winegen (2) (3)(4)(5)(6) . The two questions these studies have attempted to address are (1) what is the optimum number of wells and (2) where should the infill wells be located.…”

Section: Introductionmentioning

confidence: 99%

Influence of Permeability Anisotropy and Reservoir Heterogeneity on Optimization of Infill Drilling in Naturally Fractured Tight-Gas Mesaverde Sandstone Reservoirs, San Juan Basin

Al-Hadrami¹,

Teufel²

2000

Proceedings of SPE Rocky Mountain Regional/Low-Permeability Reservoirs Symposium and Exhibition

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Production of Mesaverde tight-gas reservoirs is highly dependent on natural fractures. Fractures not only enhance the overall permeability, they also create significant permeability anisotropy that causes the drainage area of the wells to be elliptical. Elongated drainage areas creates production interference and drainage overlap between adjacent wells that are aligned in the maximum horizontal permeability direction, and increases the potential for leaving large sections of the reservoirs undrained. In addition, the Mesaverde sandstone reservoirs are locally heterogeneous, because of their fluvial depositional environment. Reservoir characterization and simulation models have been conducted in two pilot areas to predict reservoir quality, permeability anisotropy, well productivity for infill wells drilled on 80 acre spacing. Simulation results are compared to well performance of these infill wells and demonstrate the value of reservoir simulation in determining effective drainage areas, optimum location, and additional recovery of infill wells.

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“…Winegen (2) (3)(4)(5)(6) . The two questions these studies have attempted to address are (1) what is the optimum number of wells and (2) where should the infill wells be located.…”

Section: Introductionmentioning

confidence: 99%

Influence of Permeability Anisotropy and Reservoir Heterogeneity on Optimization of Infill Drilling in Naturally Fractured Tight-Gas Mesaverde Sandstone Reservoirs, San Juan Basin

Al-Hadrami¹,

Teufel²

2000

Proceedings of SPE Rocky Mountain Regional/Low-Permeability Reservoirs Symposium and Exhibition

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“…Optimum well spacing is defined by Van Winegen as the "density of wells that will result in the greatest ultimate profit to the operator" (Aminian, 1985). According to Dr. Aminian et al, the number of wells drilled in a reservoir increases the total rate of its production; however, there exists a specific number that when determined, can result to optimum recovery, or else, the inter-well interference of more wells drilled above the required number can significantly reduce the total rate of production (Aminian, 1985). The same can be said about multi-lateral wells and to a greater extend, the spacing of these wells must be seriously deliberated.…”

Section: Well-spacing and Well-interferencementioning

confidence: 99%

“…The same can be said about multi-lateral wells and to a greater extend, the spacing of these wells must be seriously deliberated. Well interference is noticeable when the group of wells is placed in the small drainage area of a reservoir (Aminian, 1985). A reservoir (with multi-lateral wells) which has been developed with a well spacing that does not have well interference issues has a greater chance of maximum recovery (Fanchi,pp.…”

Section: Well-spacing and Well-interferencementioning

confidence: 99%

Spacing of Hydraulically Fractured Horizontal Laterals in Low Permeability Formations

Donfack¹

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The discovery of unconventional reservoirs such as tight gas sands and shale gas, the resolve for the United States to become independent of foreign hydrocarbons, toppled with depleting conventional fields around the world, has pushed for new technologies and effective and efficient approaches in unconventional reservoirs long-term production to supply their ever-growing demand. Horizontal drilling along with hydraulic fracturing are the two most popular methods used to render low-permeability formations such as the Marcellus Shale economically productive. Nowadays, coupled with horizontal drilling and hydraulic fracturing, new strategies and tools such as coil tubing and multilateral horizontal wells are being strategized and used for unconventional reservoirs as well as conventional reservoirs to maximize recovery. However, the understanding of the production performance of recently drilled hydraulically fractured horizontal wells in low-permeability formations represents a challenge because of the lack extensive production history on these new producing wells. The same is true about the multilateral horizontal wells, though they have great potential for improving the recovery. The objective of this study was to conduct a modeling study, to investigate the impact of wells spacing on the production performance of hydraulically fractured multilateral horizontal wells in low permeability formations.

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Well Des gn and Well Spacing Optimisation in Unconventional Plays

Baker

Mazumder

Sharma

et al. 2012

SPE Asia Pacific Oil and Gas Conference and Exhibition

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The risk profile for an unconventional resource play differs from a conventional opportunity in that the producibility, per well Estimated Ultimate Recovery (EUR) and Unit Technical Cost (UTC) are more important for identifying potential success than proving the presence of in-place volumes. Unconventional plays are often characterised by a large number of wells, lower density of subsurface data, large geographical extent and corresponding large range of uncertainty in subsurface parameters. The rapid economic screening of well design and spacing parameters for multiple subsurface realisations is integral in the planning stages of large unconventional plays. An additional complexity is the use of horizontal or complex geometry well designs which may limit or complicate the application of full field reservoir simulation methods. Recoverable volumes are strongly dependent on the proposed well design and spacing. These should be systematically evaluated and optimised by identifying the well density beyond which the incremental recovery and commerciality benefit begins to erode due to the extra well costs and/or interference between wells. A method for efficient analysis and comparison of complex well design and well spacing options has been designed to assist in unconventional play planning and evaluation. The method involves the automatic generation and analysis of a large number (thousands) of dynamic reservoir simulation models. The models are analysed systematically for major value drivers to: identify the most efficient well design and optimal spacing factors; select the most economic well designs; assess the impact of subsurface uncertainties; and assist in rig selection and surface planning.

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A Study of Reservoir Parameters Affecting Gas Well Spacing in West Virginia

Cited by 7 publications

References 0 publications

Influence of Permeability Anisotropy and Reservoir Heterogeneity on Optimization of Infill Drilling in Naturally Fractured Tight-Gas Mesaverde Sandstone Reservoirs, San Juan Basin

Influence of Permeability Anisotropy and Reservoir Heterogeneity on Optimization of Infill Drilling in Naturally Fractured Tight-Gas Mesaverde Sandstone Reservoirs, San Juan Basin

Spacing of Hydraulically Fractured Horizontal Laterals in Low Permeability Formations

Well Des gn and Well Spacing Optimisation in Unconventional Plays

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