A cemented well wall reinforcement agent and its preparation method

A technology of reinforcing agent and cementing agent is applied in the field of cemented well wall reinforcing agent and preparation to achieve the effect of eliminating scattered shedding phenomenon, significant fragmentation effect of broken objects, and eliminating collapse and falling blocks.

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to fundamentally solve the problem of wellbore stability in fractured formations, especially non-water-sensitive hard and brittle formations, the present invention provides a cemented wellbore reinforcement and its preparation

Method used

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  • A cemented well wall reinforcement agent and its preparation method
  • A cemented well wall reinforcement agent and its preparation method
  • A cemented well wall reinforcement agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1# formula cement and its preparation method:

[0078] Formula: 300 parts of rheology regulator (AGE), 1000 parts of main agent (E44), 500 parts of curing agent (dicyandiamide), and 50 parts of accelerator (thiourea).

[0079] Preparation method: weigh the required parts by weight of each component in proportion. Under stirring (speed 350-500rmp), slowly add the main agent of the cementing agent to the 200 parts of the rheology regulator, and stir until the main agent is completely dissolved to obtain component A; Add curing agent and accelerator to the conditioner, and stir until the curing agent and accelerator are completely dissolved to obtain component B; the above components A and component B are stored separately, and components A and B are mixed evenly to obtain Formulation 1# cement that cures in water.

Embodiment 2

[0081] 2# formula cement and its preparation method:

[0082] Formula: 350 parts of rheology modifier (AGE), 1000 parts of main agent (E44), 300 parts of curing agent (dicyandiamide), 30 parts of accelerator (thiourea).

[0083] Preparation method: weigh the required parts by weight of each component in proportion. Under stirring (speed 350-500rmp), slowly add the main agent of the cementing agent to the 280 parts of the rheology regulator, and stir until the main agent is completely dissolved to obtain component A; Add curing agent and accelerator to the conditioner, and stir until the curing agent and accelerator are completely dissolved to obtain component B; the above components A and component B are stored separately, and components A and B are mixed evenly to obtain 2# formulation cement that cures in water.

Embodiment 3

[0085] 3# Formula cement and its preparation method:

[0086] Formula: rheology regulator (HK-66) 200 parts, main agent (E51) 1000 parts, curing agent (phenol formal hexamethylenediamine) 100 parts, accelerator (2-methylimidazole-salicylate) 10 parts share.

[0087] Preparation method: weigh the required parts by weight of each component in proportion. Under stirring (rotating speed 350-500rmp), slowly add the main agent of the cementing agent to 120 parts of the rheology regulator, and stir until the main agent is completely dissolved to obtain component A; Add curing agent and accelerator to the conditioner, and stir until the curing agent and accelerator are completely dissolved to obtain component B; the above components A and component B are stored separately, and components A and B are mixed evenly to obtain 3# formulation cement that cures in water.

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Abstract

The application discloses a cemented well wall reinforcing agent and a preparation method thereof. The well wall reinforcing agent is prepared from raw materials including the following components: each component is calculated in parts by weight: 100 parts by weight of water; 7 to 15 parts by weight of cement; 15 to 15 parts by weight of temperature-resistant polymer adhesive 25 parts by weight; 2-6 parts by weight of inorganic bonding effect enhancer; 1.2-3 parts by weight of low molecular weight polymer bonding effect enhancer; 0.5-2.4 parts by weight of solvation enhancer. After being treated with the material of the present invention, the broken rock around the wellbore becomes a whole again, and due to the strong bonding properties of the material, the artificial rock mass thus generated will not be broken again in the drilling environment, even if broken , and can also be re-bonded into a new whole under the operating environment to ensure that the wellbore in the fractured zone formation remains stable during the drilling process.

Description

technical field [0001] The invention relates to the technical field of drilling, and more particularly relates to a cemented well wall reinforcing agent and a preparation method thereof. Background technique [0002] In drilling engineering, the causes of wellbore instability are complex, in various forms, and difficult to deal with. Due to the inhomogeneity of rock composition and its strong anisotropic characteristics in mechanical properties, regardless of factors such as geological age, type, burial depth, and geological environment, rocks may lose stability and collapse after drilling. possible. In addition to the common wellbore collapse caused by damage to hydration stress and mechanical balance, another type of wellbore collapse that is extremely difficult to deal with in drilling engineering is the natural fracture zone or extremely sensitive hydration stress. weakly cemented strata. Modern drilling fluid technology deals with unstable formations mainly by compre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508
CPCC09K8/5086
Inventor 蔡利山王建宇宋兆辉林永学褚奇金军斌唐文泉杨枝张凤英杨帆
Owner CHINA PETROLEUM & CHEM CORP
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