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Corrosion-resistant alloy trapezoid slotted liner and design method thereof

A design method and corrosion-resistant alloy technology, applied in calculation, special data processing applications, instruments, etc., can solve problems such as wellbore blockage, unsuitable corrosion-resistant alloy trapezoidal slotted liner, etc., to ensure integrity and reduce puncture Leakage probability, to ensure the effect of normal production

Active Publication Date: 2018-01-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for slotted liners used in deep high-temperature, high-pressure, and high-acid gas reservoirs, heavy mud is required to kill wells in deep high-temperature, high-pressure, and high-acidity gas reservoirs. Pollution deposits in the wellbore may still block the wellbore, so ordinary carbon steel rectangular slotted liners are not suitable
In summary, the existing design methods for rectangular slotted liners made of ordinary carbon steel for sand-producing oil and gas reservoirs with shallow burials are not suitable for high-yield gas wells used in deep high-temperature, high-pressure, and high-acid gas reservoirs. Design of Etched Alloy Trapezoidal Seam Slot Liner

Method used

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  • Corrosion-resistant alloy trapezoid slotted liner and design method thereof
  • Corrosion-resistant alloy trapezoid slotted liner and design method thereof
  • Corrosion-resistant alloy trapezoid slotted liner and design method thereof

Examples

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example 1

[0066] In this example, a development well mx008-H1 in a gas field in the Sichuan-Chongqing region is taken as the research object, and a slotted liner suitable for this well is designed. The specific design method includes the following steps:

[0067] Step 101, collect the drilling, logging and completion parameters of the well, and calculate H2 S and CO 2 The partial pressure, and according to image 3 The material plate shown determines the material of the slotted liner.

[0068] The formation pressure of this well is 76.61MPa, the depth of the middle part of the gas reservoir is 4610m, the H 2 The S content is 0.47%, calculated to get H 2 S partial pressure is 0.36MPa, CO 2 Content 1.44%, calculated to get CO 2 The partial pressure is 1.103MPa, and the corrosion is a severely corrosive environment, such as image 3 As shown, the nickel-based alloy should be selected to meet the long-term safe production requirements of the well.

[0069] Step 102, determining the sl...

example 2

[0076] In this example, a development well mx008-H19 in a gas field in the Sichuan-Chongqing region is taken as the research object, and a slotted liner suitable for this well is designed. The specific design method includes the following steps:

[0077] Step 201, collect the drilling, logging and completion parameters of the well, and calculate H 2 S and CO 2 The partial pressure, and according to image 3 The material plate shown determines the material of the slotted liner.

[0078] The formation pressure of this well is 76.3MPa, and the depth of the middle part of the gas reservoir is 4631m. 2 The S content is 0.56%, calculated to get H 2 S partial pressure is 0.427MPa, CO 2 Content 1.61%, calculated to get CO 2 The partial pressure is 1.228MPa, and the corrosion is a severely corrosive environment, such as image 3 As shown, the nickel-based alloy should be selected to meet the long-term safe production requirements of the well.

[0079] Step 202, determining the s...

example 3

[0090] In this example, a development well mx008-17-X1 in a gas field in the Sichuan-Chongqing region is taken as the research object, and a slotted liner suitable for this well is designed. The specific design method includes the following steps:

[0091] Step 301, collect the drilling, logging and completion parameters of the well, and calculate H 2 S and CO 2 The partial pressure, and according to image 3 The material plate shown determines the material of the slotted liner.

[0092] The formation pressure of this well is 74.7MPa, the depth of the middle part of the gas reservoir is 4591m, the H 2 The S content is 0.53%, calculated to get H 2 S partial pressure is 0.356MPa, CO 2 Content 1.71%, calculated to get CO 2 The partial pressure is 1.277MPa, and the corrosion is a severely corrosive environment, such as image 3 As shown, the nickel-based alloy should be selected to meet the long-term safe production requirements of the well.

[0093] Step 302, determining t...

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Abstract

The invention discloses a corrosion-resistant alloy trapezoid slotted liner and a design method thereof. The design method comprises the steps that a, the material of the slotted liner is determined;b, slotting parameters are determined; c, according to the material of the slotted liner and the slotting parameters of the slotted liner, residual strength of the slotted liner is checked through a finite element analysis modeling method in combination with formation collapse pressure, and whether plastic deformation areas between adjacent slots are connected is judged; d, if the plastic deformation areas between the adjacent slots are not connected, an anti-extrusion strength test is performed on a slotted liner sample, and whether the anti-extrusion strength of the slotted liner sample meets a requirement is judged; and e, if the anti-extrusion strength of the slotted liner sample meets the requirement, an overflowing test is performed on the slotted liner sample, and whether the overflowing capability of the slotted liner meets a requirement is judged. The design method is suitable for designing the corrosion-resistant alloy trapezoid slotted liner applied to a high-yield gas wellof a deep gas reservoir with high temperature, high pressure and high acidity.

Description

technical field [0001] The invention relates to the technical field of development and completion engineering safety of deep high-temperature, high-pressure, and high-acid gas reservoirs, in particular to a corrosion-resistant alloy trapezoidal slotted liner and a design method thereof. Background technique [0002] Slotted liner completion is an important well completion method. The design of slotted liner (also known as slotted screen) is an important part of well completion engineering. Only when the properties of slotted liner meet the requirements of the actual construction environment can the long-term stable production of gas wells be guaranteed. [0003] At present, those skilled in the art have carried out in-depth research on the design method of slotted liner, for example, Zhuang Baotang, Li Qian, Wu Xianzhu et al. in 2007 (Zhuang Baotang, Li Qian, Wu Xianzhu. Slotted liner under non-uniform load Numerical simulation of crush strength [J]. Natural Gas Industry, 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张林马辉运张华礼刘祥康李玉飞何轶果周浪卢亚锋阳星舒刚汪传磊
Owner PETROCHINA CO LTD