String and method for quickly surveying water in horizontal well by multi-parameter combined test without moving string

A combined testing and water finding pipe string technology, which is applied in the directions of surveying, earthwork drilling, wellbore/well components, etc., can solve the problems of long water finding period and high construction intensity, and achieve simple operation, convenient construction and low construction safety risk effect

Active Publication Date: 2015-12-02
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 str

Method used

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  • String and method for quickly surveying water in horizontal well by multi-parameter combined test without moving string

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Effect test

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] Such as 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 pr...

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 string and a method for quickly surveying water in horizontal well by multi-parameter combined test without moving the string. Mainly, test instruments (such as a flow meter and a pressure meter) are conveyed to the bottom of the well by means of an oil tube, the test instruments are connected with the oil tube in a threaded manner and are tripped in a horizontal segment of the horizontal well along with packers. According to a number of fracturing modified segments of the horizontal well and water breakthrough features, under supporting of different amounts of packers, the horizontal segment is packed into different production intervals; each production zone segment is provided with the corresponding flow meter, pressure meter and the like. After the test string is tripped in the well, the well is shut for pressure recovery test of each interval, the well is opened for production after pressure recovery test is finished, production and drainage are performed with a high-capacity drainage parameter, the string is tripped out after a certain period of production time, changes in parameters such as pressure meter pressure, temperature and flow are played back, parameters of the jammed intervals are tested interval by interval, and a water production interval is comprehensively determined; water surveying accuracy and efficiency of the horizontal well are improved.

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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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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