Production method of preset small-diameter pipe for sidetracking well and slim hole well

A technology of small-diameter pipes and production methods, which is applied in wellbore/well components, earth-moving drilling, and fluid production, etc., can solve the problems of short life and large reservoir damage, and achieve extended extension distance, prolong gas well life, and improve The effect of liquid-carrying capacity in gas wells

Active Publication Date: 2021-03-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of short service life of existing gas wells and great damage to reservoirs, the present invention provides a production method of preset small-diameter pipes for sidetracking wells and slimhole

Method used

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  • Production method of preset small-diameter pipe for sidetracking well and slim hole well
  • Production method of preset small-diameter pipe for sidetracking well and slim hole well

Examples

Experimental program
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Example Embodiment

[0028]Example 1:

[0029]In order to overcome the shortage of existing gas well, the present invention provides for the problem of reservoir damage.figure 1 withfigure 2A side drilling and small well eye well showing the preset small diameter tube production method, before the fracturing of the present invention, the small diameter tube is subjected to the small diameter tube, and the small diameter tube in the production process can be reduced. Layer injury, extending the life of the aerobi. The present invention takes a small diameter tube to substituted a continuous tube as a speed tube into a wellbore, which can improve the gas well carrying capacity, extend the gas well production period, can significantly reduce the gas well production cost.

[0030]A side drilling and small well eye well used for preset small diameter tube production methods, specific steps:

[0031]Step 1, put the side drilling and small well eye wells with the bare eye hanger and placed under the preset of the fract...

Example Embodiment

[0040]Example 2:

[0041]Based on the first embodiment, in the present embodiment, preferred, step one, side drilling and small well eye wells with bare eye sealing machine fracturing and preset small diameter tube production of fracturing pipes Hand-back-tube 3, sleeve packer 4, tubing 5, plurality of reservoir packers, plurality of sand blade, floating groove 12, and guide screen 13, reservoir packer and sand blade sequentially alternate Set, the lower end is connected to the sleeve packer 4 at the lower end, and the sleeve packer 4 is disposed in the bottom of the sleeve 1, the lower end of the sleeve 1 is a naked eye section 14, The naked eye section 14 is inclined; the plurality of reservoir packers are distributed from top to bottom in the naked eye section 14, and each reservoir is provided with a sand blade, the lowermost sand blast. The device is connected to the floating groove 12 and the guide screen 13; the uppermost reservoir packer is connected to the lower end of the sle...

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Abstract

The invention provides a method for producing a preset small-diameter pipe for a sidetracking well and a slim hole well, which comprises the following specific steps: 1, lowering a fracturing pipe column produced by fracturing the sidetracking well and the slim hole well by using an open hole packer and the preset small-diameter pipe to a preset position of a target reservoir, and ensuring that acasing packer is suspended at a position 10-15m above a sidetracking well windowing position; aligning the sand blaster to a reservoir to be transformed, and the reservoir packers clamp the reservoirtransformation section and avoid the casing joint hoop; 2, locating a pumping large-diameter steel ball at a reducing release tie-back cylinder, and when the pumping large-diameter steel ball is pressed to 25 Mpa, a casing packer and a reservoir packer are subjected to setting; and when the pressure is increased to 35Mpa, releasing the releasing tie-back cylinder for three times, and pulling out the part above the releasing tie-back cylinder. The fracturing fluid is injected from the oil jacket annulus, the construction displacement can reach 6 m < 3 >/min or above, the transformation scale can be enlarged, and the crack extension distance can be prolonged; The liquid carrying capacity of the gas well is improved, and the production cost of the gas well can be greatly reduced while the production period of the gas well is prolonged.

Description

technical field [0001] The invention relates to the technical field of downhole operations in oilfield exploration and development, in particular to a production method for preset small-diameter pipes for sidetracking wells and slimhole wells, and specifically belongs to the technical field of repeated fracturing in oil and gas fields. Background technique [0002] As most oil reservoirs in China are gradually entering the middle and late stage of development, it is extremely urgent to effectively produce remaining oil in the formation and fully tap the potential of the reservoir. It is particularly urgent to maintain stable production in mature areas at low cost. Considering factors such as reducing drilling investment, land acquisition costs, and ground equipment costs, in the original As an effective technology, sidetracking new wellbore in old well intervals has been paid more and more attention. For reservoirs with many formations, it is of great significance to carry o...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B33/122E21B43/114E21B43/14
CPCE21B43/26E21B33/122E21B43/114E21B43/14
Inventor 姜勇刘汉斌杨志伟张宏福刘锐高伟姬伟唐军吕杨王汝阳
Owner PETROCHINA CO LTD
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