Evolution of Drilling and Completions in the Slave Point To Optimize Economics
- Nolan Lerner (Northern Blizzard Resources Incorporated) | Brent Schaab (Bellatrix Exploration Limited) | Juan Garcia (Petrominerales Limited) | Dan Bianco (PennWest Exploration) | Scott Thomas (PennWest Exploration) | Jason Thompson (Legacy Oil & Gas Incorporated) | Jeremy Hollan (Packers Plus Energy Services)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- March 2014
- Document Type
- Journal Paper
- 64 - 77
- 2014.Society of Petroleum Engineers
- 1.6 Drilling Operations, 4.3.4 Scale, 2.5.4 Multistage Fracturing, 2 Well Completion, 1.6.6 Directional Drilling, 7.1.10 Field Economic Analysis, 7.1.9 Project Economic Analysis
- Slave Point, multilateral, multistage fracturing, drilling optimization, completion optimization
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- 420 since 2007
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This paper will detail the technological evolution of drilling and completion practices used to optimize the economic development of the Slave Point carbonate platform, specifically in the Evi and Otter fields in northern Alberta, Canada. The Slave Point platform was initially targeted for conventional production by means of vertical wells in the early 1980s. Success was marginal because of the unpredictability of localized porosity development. As a result, the full-scale commercial development of this resource was deemed uneconomic because of poor reservoir quality. More recently, however, horizontal-drilling and multistage-fracturing technology has allowed operators to open up lower-porosity horizons to improve flow capacity, to improve recoveries, and to allow for commercial development from zones previously deemed uneconomic. The Slave Point has a greater thickness and is less permeable than other tight-rock plays in Alberta, such as the Cardium and Viking. It produces high-quality, light oil with low water- and solution- gas-production rates. Despite high estimates of original oil in place (OIP) of approximately 3 to 10 million bbl per section, horizontal-well rates are still challenged because of the lower permeability through the pay section. In this regard, the continued deployment of innovation and technology has been critical in improving well-production performance, compressing project costs, and ultimately optimizing project economics. The focus of this paper is solely on one of the major Slave Point operators who has drilled 49 horizontal wells that account for 200 000 m (656,000 ft) drilled and 1,350 fracture stages in the Evi and Otter Slave Point fields since 2008. This operator has continually deployed advancing technologies to improve project economics. The information will be presented in terms of the influence of technology on well design, the optimization and deployment of the various technologies, and the demonstrated improvement on productivity and reserves recovery. The discussion will focus on three development phases that highlight the progression from vertical to horizontal technology:
- Vertical Appraisal
- Single-Lateral (SL) Development
- Dual-Lateral (DL) Development
The case studies presented will demonstrate clearly the production impact from the use and application of these technologies. The methods and lessons learned through the use of DLs, openhole junctures, and openhole multistage systems can be applied to other unconventional formations.
|File Size||1 MB||Number of Pages||14|
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