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Calgary, Canada

Encana Corporation produces, transports and markets natural gas, oil and natural gas liquids . It was formed in 2002 and descends from the 19th century Canadian Pacific Railway and 'Canadian Pacific Oil and Gas' in the 20th century, respectively. All of Encana’s reserves and production are located in North America since other international assets were divested in the mid-2000s. The corporate headquarters are in Calgary, Alberta. Encana has onshore operations in Alberta and northeast British Columbia and a development off the coast of Nova Scotia. In the United States, Encana's subsidiary operates in Colorado, New Mexico, Wyoming, Texas, and Louisiana. After incorporating in 2006, Encana Corporation formed two subsidiaries in 2009, with Encana operating in "unconventional natural gas and natural gas liquids exploration, processing, and transportation, and an integrated oil company called Cenovus Energy. Wikipedia.


Varsek J.,Cenovus | Abaco C.,EnCana Corporation
Leading Edge (Tulsa, OK) | Year: 2010

Exploration and drilling for natural gas in North America has moved radically away from conventional reservoirs to focus on unconventional reservoirs such as tight gas sands and shales. These reservoirs have low porosity and near-zero permeability with gas stored in natural fractures and within the matrix porosity. Economic gas production requires hydraulic fracture stimulation to open connections to existing natural fractures or matrix porosity, and successful stimulation depends on the formation's geomechanical brittleness being capable of supporting extensive induced fractures. However, despite adequate stimulation, significant variations exist between wells in expected ultimate recovery (EUR) due to the heterogeneity of these resource plays. Consequently, predicting natural fractures or fracture-prone "sweet spots" is essential to optimize development of such plays. © 2010 Society of Exploration Geophysicists. Source


Wood J.M.,EnCana Corporation
SPE Reservoir Evaluation and Engineering | Year: 2015

The efficacy of crushed-rock samples vs. small plugs or full-diameter core samples for measurement of porosity, permeability, and fluid saturation is an important consideration in the evaluation of tight-gas reservoirs and shale-gas reservoirs. Crushed-rock core analysis methods originally developed for shale reservoirs are now, in some cases, being extended to low-quality tight-gas reservoirs. In this study, crushed-rock and full-diameter core measurements from two wells drilled with oil-based mud are compared to evaluate which of the two core-analysis methods is more reliable for water-saturation assessment of a major North American tight-gas siltstone play (Montney Formation, western Canada). Measurements from the studied full-diameter core samples have wide ranges of water saturation (10 to 45%) and bulk volume water (BVW) (0.5 to 2.6%). In contrast, measurements from crushed-rock samples have much narrower ranges of water saturation (10 to 20%) and BVW (0.2 to 0.7%). The lower values and limited range of water-content measurements from crushed-rock samples suggest a significant degree of artificial water loss during sample handling in the laboratory. This conclusion is supported by comparing core-measured BVW with deep-resistivity values from openhole well logs. Full-diameter BVW measurements correlate well with log resistivity, indicating they are generally representative of in-situ reservoir conditions. Crushed-rock BVW values, on the other hand, show no correlation with log resistivity. The results of this study suggest caution is warranted in the use of crushed-rock samples for water-saturation measurements of siltstones or silty shales. Failure to recognize artificial water loss from crushed-rock siltstone samples could lead to an erroneous interpretation of irreducible water saturation at in-situ reservoir conditions with potentially serious implications for resource evaluation and exploitation. Copyright © 2015 Society of Petroleum Engineers. Source


Patent
EnCana Corporation | Date: 2013-05-23

A process and an apparatus for use in fluid fracturing of a well and the like is provided, the apparatus being a pumpable seat assembly for temporarily sealing a well casing comprising a generally cylindrical tube having an outer diameter and an inner diameter; a upper slip assembly and a lower slip assembly mounted on such cylindrical tube and adapted to selectively engage the well casing to anchor the pumpable seat assembly; an elastomeric packing element mounted on said cylindrical tube between the upper slip assembly and the lower slip assembly; and a dissolvable member positioned within the generally cylindrical tube for temporarily restricting a flow of fluids to the portion of the wellbore located below the pumpable seat assembly.


A process and process line is provided for preparing a friction-reduced hydraulic fracturing fluid at a central location which can be readily transported to an oil or gas well in a formation at a well site, comprising: preparing a mixture of polymer and water at the central location by shearing the polymer in the water in a high shear environment to create the friction-reduced hydraulic fracturing fluid; pumping the friction-reduced hydraulic fracturing fluid through a series of pumps and pipelines to the well site; and injecting the hydraulic fracturing fluid into the oil or gas well at a pressure sufficient to cause fracturing of the formation,


Patent
EnCana Corporation | Date: 2014-03-14

A fluid distribution apparatus includes a trailer having a central platform and one or more sets of wheels. The central platform may include two or more hose reels mounted thereto, each of the hose reels including a reel that is rotatable about a rotation axis and a fluid distribution hose windable around the reel. The rotation axis of each of the hose reels may be generally parallel to a longitudinal axis of the central platform. The central platform may also include a manifold coupled with each of the hose reels and couplable with an external fluid source, such as a natural gas fuel source. The manifold may provide fluid from the external fluid source to each of the fluid distribution hoses of the respective hose reels.

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