University of Khartoum

A SIMPLE METHOD FOR DIFFERENTIATION BETWEEN MOBILIT Y CONTROL AND WATER SHUT-OFF AGENTS

A SIMPLE METHOD FOR DIFFERENTIATION BETWEEN MOBILIT Y CONTROL AND WATER SHUT-OFF AGENTS

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Title: A SIMPLE METHOD FOR DIFFERENTIATION BETWEEN MOBILIT Y CONTROL AND WATER SHUT-OFF AGENTS
Author: Bashir Nimir, Hassan
Abstract: Production of excess water with oil represents a re al challenge to most oil producers especially in high environmental sensitive regions. Chemical shutoff (squeeze cement, polymer gels and foams) and/or mechanical i solators (packers) represent efficient methods to reduce or stop oil-associated water and may consequently increase oil production. The required placement pr ocess of chemical differs by the difference of required mechanism whether to increas e oil production or to shutoff water. In water shutoff treatments, the chemical i s required to penetrate mostly in watered-out fractures and/or high permeability stre aks to plug water production whereas in mobility control mechanism, the chemical is required to act differently by penetrating deeply in the low permeability oil-bear ing zones to displace the oil. This paper shows an analytical analysis based on experim ental core flood experiments with foams that allow to separate the viscosity effect f rom the permeability effect (on the mobility term) which enables selecting of chemical for either of mechanisms.
URI: http://hdl.handle.net/123456789/6734
Date: 2009-03


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