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Water control fracturing method for switchable cementing sliding sleeve of horizontal well

A horizontal well and water fracturing technology, which is applied in the direction of wellbore/well components, wellbore/well valve devices, production fluids, etc., can solve the problem of water plugging technology that is difficult to accurately control the water production section, single well production and design Anticipate low problems, achieve the effect of controlling the risk of water breakthrough, improving the recovery degree of mature oilfields, and high resistivity

Inactive Publication Date: 2020-07-31
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a water-controlled fracturing method for horizontal wells with switchable cementing sleeves. By providing a fracturing method that is accurate and effectively controls the water outlet section, it solves the problem of segmental fracturing of existing horizontal wells. Fracture technology and water plugging technology are difficult to accurately control the water-producing interval, resulting in a problem that the production of a single well is lower than the design expectation

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  • Water control fracturing method for switchable cementing sliding sleeve of horizontal well
  • Water control fracturing method for switchable cementing sliding sleeve of horizontal well
  • Water control fracturing method for switchable cementing sliding sleeve of horizontal well

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Embodiment

[0051] The invention provides a water-controlled fracturing method for a horizontal well with switchable cementing sliding sleeve, which comprises the following steps:

[0052] Step 1. According to the interpretation results of reservoir logging, select the positions with high acoustic transit time, low natural gamma ray and high resistivity in each fracturing stage as the fracturing sweet spots of each fracturing stage;

[0053] Step 2. Carry out preparatory work such as well drilling and reaming;

[0054] Step 3. Connect the switchable cementing sleeve to 5 1 / 2 "Casing predetermined fracturing position, can switch cementing sliding sleeve and 5 1 / 2 ″Thread and screw connection of the casing; run into the 5 1 / 2 ″casing, and cement the horizontal well;

[0055] The switchable cementing sleeve meets pressure ≥70MPa, high temperature resistance ≥120°C, low temperature resistance ≤-30°C, maximum outer diameter ≤178mm, minimum inner diameter ≥124.26mm, tool assembly le...

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Abstract

The invention discloses a water control fracturing method for a switchable cementing sliding sleeve of a horizontal well. The water control fracturing method comprises the steps that firstly, the positions of fracturing sweet hearts of all fracturing sections of the horizontal well are selected; then the switchable cementing sliding sleeve is arranged at the preset fracturing position of a casingpipe, the casing pipe with the switchable cementing sliding sleeve is tripped in, cementing of the horizontal well is carried out; secondly, a coiled tubing staged fracturing tool with a bottom seal is tripped in, the switchable cementing sliding sleeve is opened, fracturing construction is started; after one-section fracturing construction is completed, the coiled tubing staged fracturing tool with the bottom seal is lifted upwards to the next-section fracturing position, and so on to complete the fracturing construction of the whole horizontal well; and after all fracturing construction is finished, a drilling tool is lifted upwards to a vertical well section. According to the water control fracturing method for the switchable cementing sliding sleeve of the horizontal well, the switchable cementing sliding sleeve is arranged on the casing pipe, the casing pipe with the switchable cementing sliding sleeve is tripped in, accurate positioning of the water outlet layer section of the horizontal well is achieved, and the single well yield of the horizontal well is increased.

Description

technical field [0001] The invention belongs to the technical field of oil production engineering, and in particular relates to a water-controlled fracturing method for a horizontal well with switchable cementing sliding sleeves. Background technique [0002] In recent years, the development of intensified horizontal wells has become an effective means to maintain stable production in old oilfields, mainly adopting the double-seal single card staged fracturing process and the hydraulic sandblasting perforation staged fracturing process; among them, the hydraulic sandblasting perforation staged fracturing process The fracturing process integrates hydraulic sandblasting perforation and fracturing operations, which is simple, convenient and economical to operate; firstly, the perforation position is selected according to the reservoir logging interpretation results, and each section of perforation adopts eight 5.5mm or six 6.3mm perforations Injector; in field implementation, w...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B33/13E21B34/08
CPCE21B34/08E21B43/26E21B43/261
Inventor 吴顺林张矿生唐梅荣张彦军马兵张翔杜现飞李志文
Owner PETROCHINA CO LTD
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