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A horizontal well fixed string multi-parameter combination test rapid water finding string and method

A combined testing and multi-parameter technology, which is applied in surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as long water search period and high construction intensity, and achieve simple operation, convenient construction, and reduced construction safety risks Effect

Active Publication Date: 2018-05-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of long water search period and high construction intensity in the existing methods, the present invention provides a fast water search string and method for multi-parameter combined testing of horizontal well fixed pipe strings, which further shortens the water search cycle and improves water search efficiency , which reduces the labor intensity of on-site construction personnel. This method is convenient for construction and operation, and can effectively reduce the cost of testing.

Method used

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  • A horizontal well fixed string multi-parameter combination test rapid water finding string and method

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Embodiment 1

[0026] In order to overcome the problems of long water search period and high construction intensity in the existing methods, the present invention provides a fast water search string and method for multi-parameter combined testing of horizontal well fixed pipe strings, which further shortens the water search cycle and improves water search efficiency , which reduces the labor intensity of on-site construction personnel. This method is convenient for construction and operation, and can effectively reduce the cost of testing.

[0027] like figure 1 As shown, a horizontal well fixed string multi-parameter combination test rapid water detection string, including tubing 13, the horizontal section of the tubing 13 is evenly spaced with the first packer 5, the second packer 9, the second packer A second intelligent switch 7 is arranged between the first packer 5 and the second packer 9, and the two ends of the second intelligent switch 7 are respectively provided with a second press...

Embodiment 2

[0035] Based on Embodiment 1, in this embodiment, a plug 1 is connected to the port of the horizontal section of the oil pipe 13 close to the first pressure gauge 2 .

[0036] A lifting device 14 is connected to the vertical section of the oil pipe 13 .

[0037] The lifting device 14 is connected to the internal structure of the device. After the operation is started, injection and removal are all performed by the lifting device 14 .

[0038] The second pressure gauge 6 , the second flowmeter 8 , the first flowmeter 4 , the first pressure gauge 2 , the third pressure gauge 10 and the third flowmeter 12 are all threaded connections with the oil pipes.

[0039] The threaded connection ensures the integration of each flow meter and the oil pipe, ensuring that each flow meter does not miss the measurement number.

[0040] The first pressure gauge 2, the second pressure gauge 6 and the third pressure gauge 10 are JDYQ downhole high-precision electronic pressure gauges.

[0041] T...

Embodiment 3

[0044] Based on the above two embodiments, this embodiment provides a method for quickly finding water through multi-parameter combined testing of a horizontal well without moving a pipe string. The specific steps are:

[0045]1) First preset the switching status sequence of three smart switches on the ground, namely the first smart switch 3, the second smart switch 7 and the third smart switch 11, and complete the self-check operation on the ground to ensure that the three smart switches The device can be opened and closed normally;

[0046] 2) Run the test string into the well, wait for the first packer 5 and the second packer 9 to be lowered to the predetermined position to set and seal each interval, shut down the well after completion and conduct a pressure recovery test for 5 days, Test the pressure recovery of each sealing section;

[0047] 3) After the pressure recovery test is completed, the large-displacement liquid is discharged through the lifting device 14, and t...

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Abstract

The invention provides a multi-parameter combination test of a horizontal well fixed pipe string to quickly find a water pipe string and a method. The testing instrument (flowmeter, pressure gauge, etc.) Connect and run into the horizontal section of the horizontal well with the packer. According to the number of fracturing stages of the horizontal well and the characteristics of water breakthrough, different numbers of packers are equipped to isolate the horizontal section into different production intervals, and flow meters and pressure gauges are placed correspondingly in each production interval. After running the test pipe string into the well, shut down the well and carry out the pressure recovery test of each layer. After the pressure recovery test is completed, the well will be opened for production, and the large-volume swabbing parameters will be used for production drainage. After a certain period of production, the pipe will be pulled out. The pressure, temperature, flow and other parameters of the pressure gauge are played back in the column, and the pressure, flow and other parameters of each sealing section are tested in sections to comprehensively judge the water-producing section and improve the accuracy and efficiency of water finding in horizontal wells.

Description

technical field [0001] The invention relates to a fast water-finding pipe string and a method for multi-parameter combined testing of a horizontal well fixed pipe string in the crude oil production process, and belongs to the technical field of oil field production. Background technique [0002] Changqing Oilfield is a typical "three-low" reservoir, and oil wells need to be developed through fracturing and water injection to supplement energy. With the continuous improvement of reservoir fracturing technology, horizontal well development has become an effective means to increase the single-well production of oil wells. However, due to the development of fractures in the reservoir and the development of water injection, during the development process, it was exposed that the water cut increased rapidly, and the development contradiction of increasing water wells seriously affected the normal productivity of horizontal wells. In order to restore the normal productivity of oil w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/10
Inventor 罗有刚甘庆明吕亿明王百牛彩云李亚洲朱洪征崔文昊常莉静
Owner PETROCHINA CO LTD
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