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High-temperature-resistant weighted sand washing liquid and preparation method thereof

A technology of sand flushing and high temperature resistance, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as inability to maintain viscosity, and achieve the effects of increasing viscosity, reducing friction in the pipe, and increasing the number of cycles.

Active Publication Date: 2020-09-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a high-temperature-resistant aggravated sand washing fluid and its preparation method, which solves the problem that the existing sand washing fluid cannot maintain a certain viscosity after high-temperature shearing in ultra-deep, high-temperature, and high-pressure gas wells, and needs constant The problem of recyclable use only by supplementing high temperature resistant materials

Method used

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  • High-temperature-resistant weighted sand washing liquid and preparation method thereof
  • High-temperature-resistant weighted sand washing liquid and preparation method thereof
  • High-temperature-resistant weighted sand washing liquid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] This embodiment provides a high-temperature-resistant weighted sand washing liquid, which may include the following components according to weight percentage: fluid loss control agent 0.1%; flow pattern regulator 0.3%; weighting agent 28%; water.

[0027] The high temperature resistant weighted sand washing fluid provided in this embodiment increases the viscosity of the weighted sand washing fluid, reduces the fluid loss and reduces the internal friction of the pipe by adding fluid loss reducer, flow pattern regulator and weighting agent; And after the combination of the flow regulator and the weighting agent, the high temperature resistance is significantly increased, the high temperature resistance of the weighted sand washing fluid is improved, and a certain continuous reading can be maintained after high temperature shearing, the number of cycles is increased, and the weight is reduced. The cost of sand washing fluid.

[0028] Optionally, in the high-temperature-r...

Embodiment 2

[0066] This embodiment provides a high-temperature-resistant weighted sand washing liquid, which may include the following components according to weight percentage: fluid loss control agent 0.1%; flow pattern regulator 0.45%; weighting agent 38%; water.

[0067] The high temperature resistant weighted sand washing fluid provided in this embodiment increases the viscosity of the weighted sand washing fluid, reduces the fluid loss and reduces the internal friction of the pipe by adding fluid loss reducer, flow pattern regulator and weighting agent; And after the combination of the flow regulator and the weighting agent, the high temperature resistance is significantly increased, the high temperature resistance of the weighted sand washing fluid is improved, and a certain continuous reading can be maintained after high temperature shearing, the number of cycles is increased, and the weight is reduced. The cost of sand washing fluid.

[0068] Optionally, in the high-temperature-...

Embodiment 3

[0106] This embodiment provides a high temperature resistant weighted sand washing liquid, which may include the following components according to weight percentage: 0.15% of fluid loss control agent; 0.45% of flow pattern regulator; 38% of weighting agent; water.

[0107] For the descriptions in this embodiment that are the same as in Embodiment 1 and Embodiment 2, refer specifically to Embodiment 1 and Embodiment 2, and details will not be repeated in this embodiment.

[0108] figure 1 It is a flow chart of a method for preparing a high temperature resistant weighted sand washing fluid provided by an embodiment of the present invention.

[0109] Optionally, this embodiment also provides a method for preparing high temperature resistant sand washing liquid, refer to figure 1 Shown, this preparation method comprises the following steps:

[0110] Step 101, weighing the fluid loss control agent, flow pattern regulator, weighting agent and water respectively according to weigh...

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Abstract

The invention provides a high-temperature-resistant weighted sand washing liquid and a preparation method thereof. The high-temperature-resistant weighted sand washing liquid comprises the following components in percentage by weight: 0.1-0.3% of filtrate reducer, 0.3%-0.6% of a flow pattern regulator, 20%-60% of a weighting agent and the balance of water.. According to the high-temperature-resistant weighted sand washing liquid and the preparation method thereof, stable viscosity can be kept after high-temperature shearing in ultra-deep, high-temperature and high-pressure gas wells, and the high-temperature-resistant weighted sand washing liquid can be recycled.

Description

technical field [0001] The invention relates to the technical field of sand washing operations in oil fields, in particular to a high-temperature-resistant aggravated sand washing liquid and a preparation method thereof. Background technique [0002] When the coiled tubing sand washing operation is used in the tubing of an ultra-deep, high-temperature, high-pressure gas well with a well depth of more than 6,000 meters and a bottom-hole temperature of 140-170°C, the density, viscosity, shear force, temperature resistance, resistance-reducing performance, and compatibility of the construction fluid Performance and so on have a great influence on the success rate of jobs. The challenge of ultra-deep comes from the length of the coiled tubing required for construction. In the case of a small coiled tubing inner diameter, the internal friction of the tube is high. To ensure the construction displacement, the pump injection pressure may exceed the pressure bearing capacity of the ...

Claims

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Application Information

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IPC IPC(8): C09K8/528C09K8/584
CPCC09K8/528C09K8/584
Inventor 邹国庆张宏强高文祥郑如森汪浩洋朱良根刘爽任音南朱松柏
Owner PETROCHINA CO LTD