The Production Success of Proppant Stimulation on Horseshoe Canyon Coalbed Methane and Sandstone Commingled Wells

Production Success of Proppant Stimulation on Horseshoe Canyon Coalbed Methane Brad Albert Rieb; Brad Albert Rieb BJ Services Co. Canada Search for other works by this author on: This Site Google Scholar Timothy Tyler Leshchyshyn Timothy Tyler Leshchyshyn BJ Services Co. Canada Search for other works by this author on: This Site Google Scholar Paper presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, October 2005. Paper Number: SPE-96864-MS https://doi.org/10.2118/96864-MS Published: October 09 2005 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Rieb, Brad Albert, and Timothy Tyler Leshchyshyn. "Production Success of Proppant Stimulation on Horseshoe Canyon Coalbed Methane." Paper presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, October 2005. doi: https://doi.org/10.2118/96864-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Annual Technical Conference and Exhibition Search Advanced Search AbstractNorth American demand for natural gas has resulted in attractive commodity pricing and thus a renewed interest in unconventional reserve exploration in Canada. Recent activity in Coal Bed Methane (CBM), or Natural Gas from Coal (NGC), has yielded two primary exploration targets that are promising; one of which is the Horseshoe Canyon coal.The family of Horseshoe Canyon Coals is shallow and range in depths from about 492 ft (150 m) to 2,789 ft (850 m). Even though broadly referenced as Horseshoe Canyon, the stratigraphic range of the coal is from the Edmonton down to the Belly River formations which includes the Horseshoe Canyon formation. These coals are better described as seams or stringers and are most frequently between 1.5 ft and 5 ft in thickness and generally no more than 9.8 ft in thickness. Reservoir pressures at these depths average from 250 psi (1,700 kPa) to 510 psi (3,500 kPa). Production varies due to the commingling of up to 30 stringers per well bore and total well bore production ranges from 35 Mscf/day (1 E3m3/day) to 636 Mscf/day (18 E3m3/day).Horseshoe Canyon coals are generally accepted to be of very low water saturation, low gas production rates and produce little to no insitu water production upon completion.The most common completion technique is the sequential stimulation of each stringer by the use of coiled tubing. Marginal gas production and intolerance to completion fluids has resulted in evolution of fracturing systems including binary foamed water, CO2 / N2 proppant, conventional borate water, some hydrocarbon based and pure proppantless nitrogen systems pumped at high rates.Several issues that are dealt with in this paper include concurrent sandstone and coal perforating and stimulation, and a method for comparing coal to coal and coal to sand production. This paper will be used to examine the incremental sandstone contribution to the overall production of the well. Effect of sanding off the well will be examined as to its impact on production.The objective of this paper is to present findings of an 18 well pilot study in an ongoing 90 well case study completed in a Horseshoe Canyon development near Red Deer, Alberta, Canada.An paper submission is being chosen, and more updated data will be presented at the conference.IntroductionCBM or NGC development has increased dramatically over the last five years. A resource that was once often ignored in favor of more conventional hydrocarbon production has grown from 710 drilled wells in 2003 to a forecast 2,021 wells in 2004. The first 175 days of 2005 have licensed 1,088 new drills with a projection for the 2005 calendar year of about 3,000 new drills or perhaps more. Figure 1 illustrates the rate of CBM drilling in the province of Alberta, Canada over this time period using well defined public sources. This information as well as that following does not involve any confidential information from private sources. CBM drilling for mostly dry Horseshoe Canyon targets current makes up almost 10% of all drilling activity in Alberta which has risen from 3% in 2003.Total CBM production has risen from a modest 8.6 E3m3/day at the beginning of January, 2003 to 3,198 E3m3/day at the beginning of January, 2005. Dry CBM gas production accounted for 55% of the total CBM production at the beginning of 2003 and has risen to 98.8% of the total CBM production at the beginning of 2005. Keywords: stimulation, sandstone, proppantless nitrogen fracture, horseshoe canyon coal, upstream oil & gas, proppant, co 2, normalization, coal seam gas, nitrogen fracture Subjects: Hydraulic Fracturing, Unconventional and Complex Reservoirs, Coal seam gas This content is only available via PDF. 2005. Society of Petroleum Engineers You can access this article if you purchase or spend a download.

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