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Anti-water breakthrough material for well cementation and preparation method thereof

A technology of cementing and inorganic materials, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems affecting the cement slurry solidification process, destroying the cement sheath structure and cementation quality, and shorten the static gelation transition time , Improve the ability of water intrusion resistance and water channeling, and avoid the effect of pressure instability

Inactive Publication Date: 2017-05-24
TIANJIN BO XING ENG SCI & TECH LIMITED COMPANY OF CNPC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a waterproof channeling material for well cementing and a preparation method thereof, which solves the problem that water channeling into the cement slurry directly affects the solidification process of the cement slurry and destroys the structure and structure of the cement sheath due to the lack of special waterproof channeling materials in the prior art. Cement quality, a technical issue that adversely affects oil and gas well production

Method used

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  • Anti-water breakthrough material for well cementation and preparation method thereof
  • Anti-water breakthrough material for well cementation and preparation method thereof
  • Anti-water breakthrough material for well cementation and preparation method thereof

Examples

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preparation example Construction

[0027] Such as figure 1 As shown, it is a flow chart of the preparation method of the waterproof channeling material for well cementing, and the preparation method includes:

[0028] Step 110: Add 100 parts of fresh water into the reaction vessel.

[0029] Step 120: Add 10-35 parts of inorganic materials and 10-25 parts of the surfactant into the reaction vessel, stir at 2000r / min for 15-25min, and keep the temperature at 25°C-30°C.

[0030] Specifically, the reaction at a rotational speed of 2000r / min for 15-25min is specifically: reacting at a rotational speed of 2000r / min for 20min.

[0031] Step 130: Add 10-35 parts of the hydrophobic material, and stir at 500 r / min for 25-35 minutes to obtain the waterproof material for cementing.

[0032] Specifically, the said stirring at 500r / min rotation speed for 25-35min is specifically: reacting at 500r / min rotation speed for 20min.

[0033] The beneficial effects of this application are as follows:

[0034] (1) Organically com...

Embodiment 1

[0040] Weigh 100 parts of fresh water, put it into a container with a stirrer, then weigh 15 parts of inorganic thixotropic material and 20 parts of surfactant, cover the container, turn on the stirrer, and keep the temperature at 25°C to 30°C , reacted at 2000r / min for 20min; then added 25 parts of hydrophobic materials, 15 parts of expansion agent and 15 parts of inorganic salt, stirred at 500r / min for 30min and mixed evenly to obtain viscous liquid waterproof Material, marked as 1# sample.

Embodiment 2

[0042] Weigh 100 parts of fresh water, put it into a container with a stirrer, then weigh 20 parts of inorganic thixotropic material and 15 parts of surfactant, cover the container, turn on the stirrer, and keep the temperature at 25°C to 30°C , react at 2000r / min for 20min; then add 20 parts of hydrophobic material, 10 parts of expansion agent and 15 parts of inorganic salt, stir at 500r / min for 30min and mix evenly to get viscous liquid waterproof Material, marked as 2# sample.

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Abstract

The invention discloses an anti-water breakthrough material for well cementation and a preparation method thereof. The anti-water breakthrough material is characterized by being prepared from the following ingredients in parts by weight: 100 parts of fresh water, 10-35 parts of an inorganic material, 10-25 parts of a surfactant and 10-35 parts of a hydrophobic material. The anti-water breakthrough material for well cementation is used to improve the anti-water invasion and water breakthrough capabilities of cement mortar and avoid occurrence of water breakthrough, thus improving the well cementation quality of a well easily generating water breakthrough, and solving the technical problems in the prior art that due to lack of a special anti-water breakthrough material, after the cement mortar is subjected to water breakthrough, the solidification process of the cement mortar is directly influenced, the structure and cementation quality of a cement mantle are damaged, and adverse effects on exploitation of oil and gas wells are caused.

Description

technical field [0001] The invention relates to the technical field of well cementing in petroleum development, in particular to a waterproof channeling material for well cementing and a preparation method thereof. Background technique [0002] Most of the onshore oilfields in my country have entered the late stage of high water cut development, and even newly developed reservoirs mostly adopt the early water injection development method to maintain formation productivity, which makes the cementing operation face the problem of water channeling. At present, water channeling in oil and gas wells, especially adjustment well cementing, is a technical problem that has not been well solved in various oil fields, which seriously restricts the implementation of oil field development strategies and the improvement of oil and gas recovery. Formation water entering the cement slurry will directly affect the solidification process of the cement slurry, destroy the structure and cementa...

Claims

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Application Information

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IPC IPC(8): C09K8/467
CPCC09K8/467C09K2208/10
Inventor 卢海川刘勇张维滨霍明江汤少兵宋伟宾沙林浩李立荣侯薇谭文礼
Owner TIANJIN BO XING ENG SCI & TECH LIMITED COMPANY OF CNPC
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