Drilling and fracturing method by hydraulic jetting

A technology of hydraulic jetting and fracturing, applied in the field of drilling fracturing, can solve problems such as application limitations

Inactive Publication Date: 2014-03-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, for oil wells with edge and bottom water or faults near the wellbore, fracturing measures are rarely used in such oil and water wells due to uncontrollable reasons. Therefore, its application is also

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  • Drilling and fracturing method by hydraulic jetting
  • Drilling and fracturing method by hydraulic jetting
  • Drilling and fracturing method by hydraulic jetting

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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0032] Such as Figure 1-4 As shown, the present invention provides a hydraulic jet drilling and fracturing method, which includes the following steps:

[0033] a) A hydraulic jet drilling pipe string is run into the casing, and the bottom of the hydraulic jet drilling pipe string is provided with a radial guide outlet 21;

[0034] b) Run the casing window tool 5 into the hydraulic jet drilling pipe string, the end of the casing window tool...

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Abstract

A drilling and fracturing method by hydraulic jetting includes the steps a), tripping a hydraulic-jetting drilling string with the bottom provided with a radial guider exit into a casing; b), casting a casing trepanning tool used for trepanning of the casing into the hydraulic-jetting drilling string; c), after trepanning of the casing, lifting up the casing trepanning tool and casting the hydraulic drilling tool to perform drilling by high-pressure hydraulic jetting upon measure purpose layers; d), lifting up the hydraulic drilling tool and repeating the steps of b) and C) till drilling operation of all measure purpose layers under a shaft is completed; e), after completion of all the measure purpose layers under the shaft, lifting up the hydraulic drilling tool and the hydraulic-jetting drilling string; f), performing sand fracturing. By the method, drilling and fracturing by multiple-branched positioning hydraulic jetting can be completed in the measure purpose layers, features that drilling technology is high in positioning capability and fracturing technology is wide in controlled reservoir range can be fully exerted, and the purpose of full improvement on well reservoir fluid seepage conditions can be achieved.

Description

technical field [0001] The invention relates to a drilling fracturing method, in particular to a hydraulic jet drilling fracturing method in the field of oil and natural gas development operations. Background technique [0002] At present, as a new production stimulation technology, hydrojet directional drilling technology has been more and more applied in the field of low permeability oilfield development, such as geological exploration, oil well stimulation, improving steam injection and water injection effects, etc. Through this technology, the fractures at the far end of the reservoir can be directly and effectively communicated, the seepage capacity of the production interval can be improved, the remaining oil between wells can be produced, and the production and efficiency can be increased. However, drilling to connect reservoir fractures is still accidental and opportunistic. In some formations, due to the insufficient abundance of fractures and the limited number of ...

Claims

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Application Information

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IPC IPC(8): E21B43/26
Inventor 王文涛罗淇峰胡胜勇梁兴张子明韩锋苏建孙军徐岩松
Owner PETROCHINA CO LTD
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