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Title: Factors affecting sand production from unconsolidated sandstone Saudi oil and gas reservoir
Authors: Al-Awad, Musaed N. J.
El-Sayed, Abdel-Alim H.
Desouky, Saad El-Din M.
Keywords: Sand production
Unconsolidated sandstone
Saudi oil
Gas reservoir
Issue Date: 1999
Publisher: King Saud University
Citation: J. of King Saud University, Engg. Sc.: 11(1); 151-174
Abstract: In this work a physical model has been constructed to simulate sand production from oil and gas reservoirs. The model can accommodate unconsolidated as well as consolidated sandstone cores. The experiments were designed to investigate the effect of confining pressure, flow rate, and the displacing fluid viscosity on sand production mechanism in unconsolidated sandstone formations. Saline water (3.5% NaCI<br>by weight), light (350 API) and heavy (270 API) crude oils were used as displacing fluids in the tests. The main goal of this study was to examine if controlling of the production rate alone can solve the problem of sand production in a Saudi oil reservoir. The oil reservoir is situated in an unconsolidated sandstone formation. A produced sand sample was obtained from this reservoir. Tests were conducted on sand packs having a similar granulometric distribution to that of the reservoir. The experimental results showed that, the magnitude of sand production from the tested porous medium is strongly affected by both flow rate and confining pressure. Sand production decreases with increasing confining pressure and/or decreasing flow rate. Only very fine particles of the porous medium are produced<br>at high confining pressures. When water, or Iow viscosity crude oil are saturating the porous medium, sand production problem can be managed by controlling the flow rate. In case of saturating the porous medium by heavy crude oil, sand production mechanism becomes different and therefore, controlling only the flow rate cannot stop sand production. Hence, alternative sand control measures must be applied to control sand production in heavy crude oil reservoirs such as down hole emulsification, gravel packing, screen liners, or down hole consolidation.
Description: Petroleum Engineering Department, College of engineering, King Saud University.
URI: http://hdl.handle.net/123456789/1281
Appears in Collections:Journal of the King Saud University - Engineering Sciences

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