Optimization Design for Oil-Water Separator of Injection-Production Technology in the same Well

Abstract

In order to solve the problem of high water cut wells in some oil field in Daqing that it could not get the large-scale application because of the bad separating effect of down hole centrifugal oil-water separator, we optimize the design of multi-cup uniform flux oil-water separator according to the similar separation principle of multi-cup uniform flux gas anchor, and it is obtained to achieve of injection-production technology in the same well which is of high water cut. The design concept of the separator is increasing the number of opening every layer and aperture gradually in subsection from up to down in the design process. The purpose is to get the close intake quantity of every orifice and guarantee the residence time is long enough in the separator, effectively shorten the length of down hole oil-water separator and reduce the production costs and operating costs.

Design of downhole oil-water separation device and study on separation mechanism based on rod pump heavy oil system

“…Efficient downhole oil-water separation is carried out for high-water cut production wells to produce low-water cut oil [1], thereby reducing water production, extending the production cycle to the maximum, improving the ultimate recovery rate [2], effectively alleviating the pressure of produced water gathering, transportation, and subsequent treatment [3][4][5], and increasing the number of injection layers and injection well points, providing powerful conditions for realizing the sustainable development of oil fields [6].…”