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Desander for Downhole Oil/Water Separation.
Many medium or heavy oil wells producing from unconsolidated sandstone reservoirs experience high water production while still at relatively low recoveries. Although downhole oil/water separation (DHOWS) systems were recently developed to address this problem, their use is compromised by produced solids remaining in the disposal water stream, which is reinjected downhole. These solids may invade and plug the disposal zone or they may accumulate in the wellbore, leading to reduced injectivity and reduced effectiveness of a DHOWS system.
PanCanadian Petroleum, Ltd., an industry leader in the development and application of DHOWS technology, particularly for heavy oil fields, in conjunction with C-FER Technologies, Inc. (200 Karl Clark Rd., Edmonton, Alberta Canada T6N 1E2; Tel: 403/450-3300, Fax: 403/450-3700) developed a desanding separator unit for use in conjunction with the commercially available DHOWS systems. PanCanadian Petroleum, Ltd. ultimately produced an add-on desanding separator, containing an abrasion-resistant, titanium, hydrocylone liner with fluid flow paths to allow commingling of the separated sand and oil concentrate streams.
Tamara Danyluk, senior production engineer of PanCanadian Petroleum, Ltd. (150-9 Ave. SW, Calgary, Alberta, Canada T2P 2S5; Tel: 403/290-3502, Fax: 403/290-2213) described the project to EERN. "Performing desanding before deoiling reduces erosion in the deoiling hydrocyclone, preconditions the inflow stream into the desanding hydrocyclone, and allows a simple add-on separator for use with an existing DHOWS system." The desanding separator unit removes solids from the produced ...
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