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Resource Conservation Branch PO Box 9329 Stn Prov Gov’t Victoria, BC V8W 9N3 |
Phone: (250) 952-0310 Fax: (250) 952-0301 Alt: (250) 952-0311 |
GUIDELINE FOR APPLICATION FOR APPROVAL OF A SCHEME FOR PRESSURE MAINTENANCE OR IMPROVED RECOVERY
- a map showing the scheme area, together with the title holders within this area and in adjacent title-holdings;
- a general discussion of the history and development of the pool for which the scheme is proposed, including a tabulation of completion details, initial potential and latest test data for all wells completed in the pool;
- a discussion of the geology of the pool, including relevant cross-sections or fence diagrams, together with contour maps showing structure on top of the formation and top and base of porosity;
- a discussion of the reservoir rock properties, including isopach maps of net pay, together with details of the estimations of average net pay, porosity, permeability, water saturation and fluid-interface elevations; net pay values should be based on cut-offs accepted by the Oil and Gas Commission after discussion with the operator;
- a discussion of the reservoir fluid properties, such as saturation pressure, oil and gas formation volume factors, oil and gas viscosities, solution gas-oil ratio, and relevant fluid analyses; details of the variation of these properties with pressure should be included;
- an estimate of the volume of hydrocarbons originally in place in the pool;
- a discussion of the pressure-production history of the pool including isobaric maps and a graphic reservoir history showing oil-production rates and cumulative volumes, together with appropriate gas-oil and water-oil ratios;
- a discussion of the primary producing mechanism in the pool and details of estimations of the rate-time performance and ultimate recovery under continued primary depletion;
- a general discussion of the need for an improved recovery scheme in the pool and the reasons for selecting the method being proposed;
- a prediction of the pool’s rate-time performance and ultimate recovery under the proposed scheme; this should include the results obtained from relevant laboratory experiments, together with a discussion of the methods used in calculating areal, vertical, and displacement sweep efficiencies, and in predicting injection and production rates;
- a discussion of the optimization of injection pattern and the scheduling of injection start-up, together with details of the proposed level of reservoir withdrawal balance to be maintained under the improved recovery scheme;
- details of the completion of the injection-fluid source and injection wells, including diagrams showing existing and proposed completion intervals, casing and tubing details, depths of packers and nature of the inhibited fluid to be used in annuli;
- a discussion of the source of injection fluid and its compatibility with existing reservoir fluids;
- details of the surface injection-fluid handling, distribution and metering facilities, including flow diagrams;
- written statements from other interested parties indicating their reaction to the proposed improved recovery scheme. Examples of such statements are provided here and here.
Two copies of the application are to be submitted to the Director of the Resource Conservation Branch of the Oil and Gas Commission in Victoria at the address noted above. Additional copies may be made available to owners directly affected upon request. Notice of an application may be published in The British Columbia Gazette.