Oil and gas well fracturing construction method

A construction method and technology for oil and gas wells, which is applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve the problems of high drilling and grinding risks, long operation time, high cost, etc., and achieve the effect of reducing the risk of bridge plug construction

Active Publication Date: 2021-04-23
SICHUAN WELDON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of composite bridge plugs or insufficient dissolution of soluble bridge plugs, coiled tubing is required for drilling and grinding, which has high risk of drilling and grinding, long operation time and high cost

Method used

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  • Oil and gas well fracturing construction method
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  • Oil and gas well fracturing construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055]An oil and gas well fracturing construction method, the first paragraph uses a bore of the oil or toe-ended slide, and the sleeve deformation section is used as follows:

[0056]Step (1), the continuous tube is completed 48 shots under the sleeve deformation section of the horizontal well.

[0057]Step (2), according to the number of cellular holes, 48 ​​biological knots and 1 square strong chemical fluids are prepared, and the previous segment segments are blocked;

[0058]Step (3), use a continuous tube to incident a hole gun, complete 48 shots construction;

[0059]Step (4), repeat steps (2) and (3), complete 3 segment adhesive;

[0060]Step (5), the pump is fed into the reinforcing liquid, blocking the first / 2 layers, the biological junction will slowly dissolve in the reinforcing liquid, block the biological finolution and slit, keep the sealing status of 15-20 days;

[0061]Step (6), repeat the above steps to complete the entire casing deformation section;

[0062]Step (7), using a continu...

Embodiment 2

[0064]With the same method as in Example 1, the particles were added to the pumped reinforcing liquid, and the hydration agent was added, and after entering the formation, the capsule was broken, and the reinforcing liquid was subjected to water. Can't harm the formation.

Embodiment 3

[0066]The preparation of the biological junction in Examples 1 and 2 selects a molecular weight of the tensile strength of 120 MPa having a molecular weight of 80 W, which is spinned, woven from a rope, and then uses this polyorol material. A rope junction in a diameter of 17-20 mm, and the diameter of the rope can be adjusted according to the eyegles to be blocked, and the two ends of the rope have a woven wire having a length of 20-25 mm.

[0067]The biological knot was dissolved, the test temperature was 90 ° C, the medium was purified.

[0068]Test results: under 90 ° C, under water conditions, 4 days began to dissolve, 6 days of rope finish completely broken, completely dissolved on day 11. After drying, weighhed, and the overall dissolution rate was 98.8%.

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Abstract

The invention discloses an oil and gas well fracturing construction method. The oil and gas well fracturing construction method adopts a biological junction perforation plugging technology for operation. According to the fracturing construction technology, a biological junction is used for replacing the segmented temporary plugging effect of a bridge plug, the biological junction perforation plugging technology can solve the construction of a casing deformation section and can also be used in a normal whole well section, and meanwhile, the biological junction can also be used for steering in the fracturing process. The environment-friendly biological junction segmented temporary plugging technology is adopted, the bridge plug construction risk is reduced, a reservoir is uniformly fractured, segmented fracturing can be carried out on a casing deformation section, and the influence of casing deformation on the yield of a well is reduced.

Description

Technical field[0001]The present invention belongs to the field of geological exploration and development, and specifically, a method of compacting a fracturing of an oil and gas well.Background technique[0002]With the continuous ingestion of oil exploration and development, the low penetration, low porosity, etc. is increasing, and conventional direct wells have not been able to meet the development requirements, and the horizontal well has gradually become the necessary means of improving the comprehensive benefits of oilfield exploration and development. Horizontal well has a large ventilation area, high single well production, high degree of penetration, and has high degree of reserves, which can effectively avoid the advantages of obstacles and harsh strips. Horizontal well segment fracturing technology has become a very oil and gas development. technology.[0003]As a typical very oil-retrieval resource, shale gas has a characteristic such as low porosity, extremely low matrix p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/116E21B33/138E21B43/22
CPCE21B33/138E21B43/116E21B43/16E21B43/26
Inventor 田之江张其平易建国张克成刘严
Owner SICHUAN WELDON CHEM
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