Immovable string hydraulic jetting technology for fracture acidizing and string for immovable string hydraulic jetting technology for fracture acidizing

A technology of hydraulic jetting, fracturing and acidizing, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc. Problems such as low collection rate, to achieve the effect of reducing work intensity, operation risk, cost, and construction operation process

Inactive Publication Date: 2013-05-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the conventional hydraulic jet fracturing process in the second prior art process, which is limited to single-layer fracturing, it is impossible to realize hydraulic jet fracturing with continuous tubing and coiled tubing, resulting in low construction efficiency, low oil and gas recovery rate, and waste of equipment Due to the problem of increased resources and costs, the embodiment of the present invention provides a hydrojet process for fracturing and acidizing a non-moving string and its string

Method used

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  • Immovable string hydraulic jetting technology for fracture acidizing and string for immovable string hydraulic jetting technology for fracture acidizing

Examples

Experimental program
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Effect test

Embodiment 1

[0039] see figure 1 , a non-moving string hydrojet process for fracturing and acidification. It adopts the method of connecting multi-stage spray guns in series. After connecting the multi-stage pipes in series, it is lowered into the well. First implement N-layer fracturing to realize N-layer fracturing without moving the string, wherein, N>1, the number of balls is N, and the number of injectors is N;

[0040] The non-moving column hydrojet process for fracturing and acidizing is specifically operated according to the following steps:

[0041] Step 1, tool to well, measure size;

[0042] Step 2, use the specified size of the well gauge to pass the well to the bottom of the artificial well;

[0043] Step 3, lower the injection tool to the designed position;

[0044] Step 4, measure the depth electronically, and adjust the position of the pipe string;

[0045] Step 5, install the fracturing pipeline;

[0046] Step 6, the fracturing vehicle is emptied and pressure tested; ...

Embodiment 2

[0071] The embodiment of the present invention also provides a pipe string used in the hydraulic injection process of the fixed pipe string for fracturing and acidification, including oil pipe and a plurality of balls. Section 20, ball seat 6 and guide section 30 constitute,

[0072] The safety connection section 10 is arranged at the uppermost end, and the safety connection section 10 includes a safety joint;

[0073] The centralizing injection section 20 is arranged in the middle, and the centralizing injection section 20 includes centralizers 1 and injectors, the number of the centralizers 1 is 2N, the number of the injectors and the balls is N, the The injectors are arranged in the order of No. N to No. 1 from top to bottom. Each injector is connected to a centralizer 1 at both ends, and No. N injectors to N-1 injectors include injector bodies and equipment. For the inner sliding sleeve in it, the No. 1 injector 5 includes the injector body, and the inner sliding sleeve i...

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Abstract

The invention discloses an immovable string hydraulic jetting technology for fracture acidizing and a string for the immovable string hydraulic jetting technology for fracture acidizing, belonging to the field of petroleum and natural gas. A multi-stage jet serial connecting method is adopted by the embodiment of the invention, sugarcoated haw string type pipes are strung in a well, and when multilayer fracturing is implemented, a method of throwing balls to transfer layers is adopted to implement multilayer fracturing from bottom to top to realize immovable string multilayer fracturing. Each jet corresponds to one production layer. The upper end and the lower end of each jet are respectively connected with two centralizers. By adopting the technology, the combined operation of jetting and fracture acidizing can be realized without lifting up the string. Moreover, the quantity of the jets can be determined according to well situations. The technology provided by the invention has the advantages that the construction operation processes can be effectively reduced, the working intensity and the operating risk of construction personnel and the cost can be reduced, the oil-gas recovery efficiency and the recovery quantity can be greatly improved, and the recovery cost is reduced.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas, in particular to a hydrojet process for fracturing and acidizing a fixed pipe string and the pipe string thereof. Background technique [0002] After the oil and gas wells in the oil and gas fields have completed the drilling project, in order to increase the oil and gas production, the construction of production stimulation measures is generally carried out. The common production stimulation construction technology includes processing the underground production layer, and using deep penetration perforation to open the oil and gas from the underground. The passage from the production layer to the wellbore is an important measure for the oil industry to stabilize and increase production. [0003] Specifically, there are two processes. [0004] Process 1, using shell perforation technology, due to its limited perforation depth, it is not easy to penetrate the pollution zone, and it is easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/27E21B43/117
Inventor 佘朝毅尹强张华礼桑宇喻成刚邓友超王柯李明
Owner PETROCHINA CO LTD
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