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Gas channeling control cement slurry system applicable to shale gas well cementation and preparation method thereof

A technology for preventing gas channeling and cement slurry, applied in the field of oil drilling and cementing, can solve problems such as poor compatibility of rubber powder and influence on the stability of cement slurry, achieve good ability to control water loss, protect from pollution, The effect of improving elasticity

Inactive Publication Date: 2018-05-18
卫辉市化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cement slurry system used in shale gas well cementing construction mainly relies on adding rubber powder to improve the elasticity of cement stone, but rubber powder itself is not compatible with cement slurry, which will affect the stability of cement slurry

Method used

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  • Gas channeling control cement slurry system applicable to shale gas well cementation and preparation method thereof
  • Gas channeling control cement slurry system applicable to shale gas well cementation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An anti-gas channeling cement slurry system suitable for shale gas cementing, comprising the following raw materials in parts by weight: 100 parts of G grade oil well cement, 73 parts of fresh water, 25 parts of lightening agent, 0.5 part of G403 oil well cement toughening agent, 12 parts of stabilizer, 2.5 parts of G33S oil well cement fluid loss reducer, 1.4 parts of GH-9 oil well cement retarder, 2.5 parts of G401 oil well cement expansion agent, 0.3 parts of USZ oil well cement drag reducer, 0.2 parts of XP-1 defoamer share.

[0026] The preparation method of the anti-gas channeling cement slurry system applicable to shale gas cementing comprises the following steps:

[0027] ① Weigh G grade oil well cement, lightening agent, G403 oil well cement toughening agent, stabilizer, G33S oil well cement fluid loss reducer, G401 oil well cement expansion agent, USZ oil well cement drag reducer, mix well and set aside;

[0028] ②Put fresh water, GH-9 oil well cement retarde...

Embodiment 2

[0031] An anti-gas channeling cement slurry system suitable for shale gas cementing, including the following raw materials in parts by weight: 100 parts of G-grade cement, 75 parts of fresh water, 22 parts of lightening agent, 0.5 part of G403 oil well cement toughening agent, stable 10 parts, G33S oil well cement fluid loss reducer 2.5 parts, GH-9 oil well cement retarder 1.5 parts, G401 oil well cement expansion agent 2.5 parts, USZ oil well cement drag reducer 0.3 parts, XP-1 defoamer 0.2 parts .

[0032] The preparation method of the anti-gas channeling cement slurry system suitable for shale gas well cementing is the same as that in Example 1.

Embodiment 3

[0034] An anti-gas channeling cement slurry system suitable for shale gas cementing, including the following raw materials in parts by weight: 100 parts of G-grade cement, 64 parts of fresh water, 15 parts of lightening agent, 0.5 part of G403 oil well cement toughening agent, stable 8 parts, G33S oil well cement fluid loss reducer 2.5 parts, GH-9 oil well cement retarder 1.4 parts, G401 oil well cement expansion agent 2.5 parts, USZ oil well cement drag reducer 0.3 parts, XP-1 defoamer 0.2 parts .

[0035] The preparation method of the anti-gas channeling cement slurry system suitable for shale gas well cementing is the same as that in Example 1.

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Abstract

The invention discloses a gas channeling control cement slurry system applicable to shale gas well cementation, which consists of G-grade oil well cement, fresh water, weighting agent or lightening agent, quartz sand, G403 oil well cement toughening agent, redispersible emulsion powder, stabilizer, G33S oil well cement filtrate reducer, GH-9 oil well cement retarder, G401 oil well cement expansionagent, USZ oil well cement drag reducer and XP-1 defoaming agent. Regulated by the added admixture weighting agent and lightening agent, elastic gas channeling control cement slurry systems with different specific gravities are prepared by the invention, the well cementation requirements of different blocks and different formations can be met, and oil and gas reservoirs can be cemented well. Thefiltrate reducer, the retarder, the expansion agent and the drag reducer adopted by the invention have extremely high adaptability, and are highly compatible in different cement slurry systems, so that the comprehensive properties of the cement slurry systems are excellent.

Description

technical field [0001] The invention relates to the field of petroleum drilling and cementing, in particular to a gas channeling prevention cement slurry system suitable for shale gas cementing and a preparation method thereof. Background technique [0002] Shale gas refers to the exploitable unconventional natural gas stored in shale formations, which mainly exists in natural fractures and pores in the state of adsorption and dissociation. The development of shale gas has extensive geological significance and exists in almost all basins. However, due to the low permeability of shale gas reservoirs, it is difficult to exploit. In order to increase production in the later stage, large-scale staged fracturing operations are generally required. The performance requirements for cement stone are higher. At the same time, for different strata, the mining difficulty is not the same, and it is necessary to use cement slurry with different specific gravity and characteristics to sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C09K8/467C09K8/48C09K8/473C09K8/493
CPCC04B28/04C04B2201/20C04B2201/50C09K8/467C09K8/473C09K8/48C09K8/493C04B14/24C04B14/06C04B24/26C04B14/062C04B2103/0068C04B2103/46C04B2103/22
Inventor 赵俊涛卢甲晗梁艳丽吉万山张卫平罗梓荣董俊杰常少赟张鹏张珂
Owner 卫辉市化工有限公司
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