High temperature-resistant and gas channeling-resistant cement system and preparation method thereof

A technology of anti-gas channeling and high temperature resistance, which is applied in the field of petroleum drilling engineering, can solve the problems of difficult gas channeling prevention of cement slurry, high formation pressure, high temperature stability of cement slurry, etc., and achieve excellent high temperature aging resistance, Good strength stability at high temperature, uniform and dense microstructure

Inactive Publication Date: 2018-09-11
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of deep burial and high formation pressure of carbonate rock reservoirs in Tahe Oilfield, which lead to high requirements for high-temperature stability of cement slurry and difficulty in preventing gas channeling of cement slurry, the invention provides a high-temperature-resistant and anti-gas channeling cement System and its preparation method

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  • High temperature-resistant and gas channeling-resistant cement system and preparation method thereof
  • High temperature-resistant and gas channeling-resistant cement system and preparation method thereof
  • High temperature-resistant and gas channeling-resistant cement system and preparation method thereof

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preparation example Construction

[0058] According to another aspect of the present invention, the present invention provides a method for preparing a high temperature resistant and anti-gas channeling cement system, comprising the following steps:

[0059] (1) Mix G-grade oil well cement, silica fume, and inorganic toughening fiber evenly according to the proportion;

[0060] (2) Mix fluid loss reducer, dispersant, latex anti-channeling agent, latex stabilizer, nano liquid silicon, high temperature retarder, defoamer and water according to the proportion;

[0061] (3) Slowly pour the mixture of step (1) into the mixture of step (2), and stir rapidly with a high-speed mixer at a speed of 4000 rpm.

Embodiment 1

[0066] (1) Mix cement, silica fume, and inorganic toughening fiber evenly according to the ratio; (2) Mix fluid loss reducer, dispersant, latex anti-channeling agent, latex stabilizer, nano liquid silicon, high temperature retarder, (3) Slowly pour the mixture of step (1) into the mixture of step (2), and stir rapidly with a high-speed mixer at a speed of 4000 rpm.

[0067] Among them, the composition of the mass parts of the cement slurry is as follows: 100 parts of cement, 60 parts of composite silica fume, 1 part of inorganic toughening fiber, 2 parts of fluid loss reducer, 0.5 part of dispersant, 10 parts of latex anti-channeling agent, 1 part of latex stabilizer 10 parts of nano liquid silicon, 2.8 parts of high temperature retarder, 1.2 parts of defoamer, 65 parts of water.

Embodiment 2

[0069] Prepare the cement slurry of the high temperature resistant and anti-gas channeling cement system according to the same method as in Example 1, wherein the mass parts of each component in the cement slurry are composed as follows: 100 parts of cement, 60 parts of composite silica fume, 40 parts of iron ore powder, inorganic additives 1.5 parts of tough fiber, 1.8 parts of fluid loss reducer, 0.7 parts of dispersant, 10 parts of latex anti-channeling agent, 1.2 parts of latex stabilizer, 6 parts of nano liquid silicon, 2.5 parts of high temperature retarder, 1.2 parts of defoaming agent, water 70 servings.

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Abstract

The invention relates to the field of petroleum drilling engineering, and especially relates to a high temperature-resistant and gas channeling-resistant cement system and a preparation method thereof. The high temperature-resistant and gas channeling-resistant cement system comprises, by weight, 100 parts of cement, 60 parts of composite silicon powder, 1-1.5 parts of inorganically toughened fibers, 1.5-3 parts of a fluid loss agent, 0.3-0.7 part of a dispersant, 6-10 parts of a latex gas channeling inhibitor, 1-1.2 parts of a latex stabilizer, 6-10 parts of nano-liquid silicon, 2.5-8 parts of a high temperature retarder, 1-1.5 parts of an antifoaming agent and 65-90 parts of water. The preparation method of the high temperature-resistant and gas channeling-resistant cement system comprises the following steps: (1) uniformly mixing the cement, the silicon powder and the inorganically toughened fibers in proportion; (2) uniformly mixing the fluid loss agent, the dispersant, the latex gas channeling inhibitor, the latex stabilizer, the nano-liquid silicon, the high temperature retarder, the antifoaming agent and the water in proportion; and (3) slowly adding the mixture obtained instep (1) into a mixture obtained in step (2), and performing rapid stirring by a stirrer.

Description

technical field [0001] The invention relates to the field of petroleum drilling engineering, in particular to a high-temperature-resistant and gas-channeling-resistant cement system and a preparation method thereof. Background technique [0002] With the deepening of oil and gas exploration in the western region, there are more and more deep wells and ultra-deep wells. Deep well cementing is faced with the problems of high temperature stability of cement slurry and difficulty in preventing gas channeling. Stable production is the key to cementing operations. [0003] The cementing slurry system and supporting technological measures are the key to preventing annular air channeling after cementing and maintaining long-term stable production of oil and gas wells. Annular channeling has been a problem that has plagued cementing operations for many years. There are three main causes: one is poor interface cementation, mainly due to the existence of mud cake, which leads to poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C09K8/467C09K8/493C09K8/48
CPCC04B28/02C04B2201/20C04B2201/50C09K8/467C09K8/48C09K8/493C09K2208/08C09K2208/10C04B14/06C04B20/0048C04B24/16C04B24/226C04B24/2676C04B2103/0068C04B2103/22C04B24/045C04B22/002C04B18/148
Inventor 罗发强马新中易浩赫英状贾晓斌周伟王永洪杨兰田张俊路飞飞李斐牛晓彭明旺刘晓民王轲
Owner CHINA PETROLEUM & CHEM CORP
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