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Method for combining zonal testing and separate-layer oil production

A layer-by-layer oil recovery and layer-by-layer testing technology, which is applied in the directions of measurement, production fluid, earthwork drilling, etc., can solve the problems of long construction time and failure to improve the ultimate recovery of crude oil, so as to avoid interference, facilitate layer-by-layer testing and The effect of layered oil recovery and enhanced ultimate recovery

Active Publication Date: 2018-02-23
PETROCHINA CO LTD
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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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  • Method for combining zonal testing and separate-layer oil production
  • Method for combining zonal testing and separate-layer oil production

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Embodiment Construction

[0076] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art. In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0077] An embodiment of the present invention provides a method for combined layer testing and layer oil recovery, the method comprising:

[0078] Step 1. Construction preparation

[0079] 101. Well flushing: pump well flushing fluid into the oil casing annulus of the target oil well, the flushing fluid is water, and make the well flushing fluid flow back from the tubing, and the displacement of the well flushing fluid is controlled at 25-30m 3 / h, after the well flushing fluid returns from the tubing, stop flushing the well; when the wellhead pressure is 0MPa, contin...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/14E21B33/122E21B21/00E21B47/00
CPCE21B21/00E21B33/122E21B43/14E21B47/00
Inventor 付亚荣马永忠张睿荫王爱芳李小永姜一超靳利付丽霞和改英李云姚庆童张云钊焦立芳付茜
Owner PETROCHINA CO LTD
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