Title: A full field model of the East Velma West Block Sims Sand unit reservoir
Abstract: A full field numerical model of the East Velma West Block Sims Sand Unit (EVWBSSU) reservoir was developed. The three-dimensional, four-component, heterogeneous, 4500 cell model will aid in the evaluation, analysis, and operation of a CO/sub 2/ flood now in progress. CO/sub 2/ is being injected in a continuous mode into the updip portion of the steeply dipping reservoir. A specially constructed grid, detailed reservoir description, and multiple fluid property tables were used to account for the variation in the reservoir's structure, geology, and fluid properties. By matching 33 years of production history, the present state of the reservoir was determined. Methods of production included primary depletion under gravity drainage, secondary production using gas injection for pressure maintenance, and waterflood. Using the history matched model, field performance predictions were made for continued waterflood and various operating scenarios under the present CO/sub 2/ injection scheme. Results include the effect of CO/sub 2/ pipeline supply rate, allocation of CO/sub 2/ and water to injection wells, and uncertain parameters on reservoir performance. From these projections it was concluded that the amount of injected CO/sub 2/ required to produce an incremental barrel of oil over waterflood was not strongly dependent on CO/sub 2/ pipelinemore » supply rate or allocation of injected fluids to injection wells. This conclusion seems reasonable mechanistically because the miscible displacement was dominated by gravity, the areal variation in predicted updip oil saturation was not great, and the continuous injection coupled with high permeability updip caused uniform distribution of CO/sub 2/.« less
Publication Year: 1984
Publication Date: 1984-04-01
Language: en
Type: article
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