The Production Success of Proppant Stimulation on Horseshoe Canyon Coal Bed Methane and Sandstone Commingled Wells
Bibliographic record
Abstract
Abstract North 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 150 m (492 ft) to 850 m (2,789 ft). 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 0.5 m and 1.5 m in thickness and generally no more than 3.0 m (9.8 ft) in thickness. Reservoir pressures at these depths average from 1,700 kPa (250 psi) to 3,500 kPa (510 psi). Production varies due to the commingling of up to 30 stringers per well bore and total well bore production ranges from 1 Em3/day (35 Mscf/day) to 18 Em3/day (636 Mscf/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 extended abstract 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 extended abstract 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 extended abstract submission is being chosen, and more updated data will be presented at the conference. Introduction Coal Bed Methane (CBM) 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 510 drilled wells in 2003 to a forecast 1,350 wells in 2004. The first 120 days of 2005 have licensed 425 new drills with a projection for the 2005 calendar year ranging from 1,500 to 3,000 new drills. 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. Total CBM production has risen from a modest 8.6 103m3/day at the beginning of January, 2003 to 3,198 103m3/day at the beginning of January, 2005.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".