Method for combining zonal testing and separate-layer oil production

Abstract

The invention discloses a method for combing zonal testing and separate-layer oil production and belongs to the technical field of oil production in oil field. The method comprises the steps of preparation work, wherein the preparation work comprises the steps of flushing a well, pulling out a production tubular column, conducting thorn washing and diameter dredging on an oil pipe, removing sand,drifting, scraping and cutting a sleeve and washing the well for the second time. Zonal testing and separate-layer oil production tubular column construction comprise the steps of putting down a release connector tubular column and a cable, releasing, and putting down a cable for secondary butt-joint with the tubular column. Separate-layer oil production rod column construction comprises the stepsof putting down a separate-layer oil production rod column, and adjusting anti-impact distance. A wellhead is mounted after well completion, and after an industrial personal computer acquires crude oil signals of all oil layers normally and controls a first electric adjustable switch and a second electric adjustable switch to be switched on and off, combination construction of zonal testing and separate-layer oil production is completed. The switching-on degrees of the first electric adjustable switch and the second electric adjustable switch are controlled by the industrial personal computer, and exploitation is conducted in separate layers.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, in particular to a combined method of layer testing and layer oil recovery. Background technique [0002] In the early 1970s, Daqing and Xinjiang Oilfields proposed the concept of layered oil recovery in view of the characteristics of heterogeneous sandstone oilfields with many oil layers, large differences in physical properties between layers, and serious interlayer interference. It is one of the basic means to increase the oil recovery rate and ensure the oil field has a higher ultimate recovery rate. During stratified production, it is necessary to test parameters such as pressure and fluid production of different oil layers, so as to use appropriate oil recovery technology to exploit different oil layers, thereby improving the ultimate recovery of crude oil. Therefore, in order to improve the recovery efficiency of heterogeneous sandstone oilfields, it is very necessary to...

AI Technical Summary

Problems solved by technology

[0005] When the method provided by the prior art is used for layered oil recovery, the parameters such as the pressure and liquid production of each oil layer are longer than the current oil recovery construction, resulting in a certain blindness in the selection of layered oil recovery technology, so the crude oil cannot be improved. ultimate recovery factor

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