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Elasto-plastic well cementing cement slurry and preparation method thereof

A cementing cement slurry and elastic-plastic technology, applied in the field of cement, can solve the problems of high construction equipment requirements, poor bonding performance, high mixing requirements, etc., achieve low price, improve mixing unevenness, and easy slurry mixing Effect

Active Publication Date: 2014-03-05
成都欧美克石油科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages are high price, high mixing requirements, high construction equipment requirements, not easy to disperse, and poor bonding performance with cement matrix

Method used

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  • Elasto-plastic well cementing cement slurry and preparation method thereof
  • Elasto-plastic well cementing cement slurry and preparation method thereof
  • Elasto-plastic well cementing cement slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Example Preparation and Performance Measurement of Cementing Slurry with and without Plasticizer Added

[0023] As shown in table 1, the elastoplastic solid cement slurry of embodiment is made by mixing the raw materials of following weight composition:

[0024] Table 1

[0025]

[0026] After weighing the above components according to the corresponding weight percentages, mixing and stirring, the elastoplastic cementing cement slurry is prepared. Wherein, the plasticizer was surface-treated using a plasma surface treatment apparatus before mixing; the processing parameters of the surface treatment were: power 200W, processing time 30s, working gas as air, and vacuum degree as 10Pa. In Table 1, the high-temperature stabilizer described in each embodiment and comparative example is micro silicon, and the described fluid loss reducer is any one of AMPS polymer, ketone-aldehyde condensation class and PVA system, and the described plasticizer is Polyisoprene high molec...

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Abstract

The invention discloses an elasto-plastic well cementing cement slurry which is prepared from the following components in parts by weight: 100 parts of cement, 0-12 parts of high-temperature stabilizing agent, 0-200 parts of density adjuster, 4-10 parts of filtrate loss reducer, 0-2 parts of dispersing agent, 0-1.5 part of retarder, 35-110 parts of water, 0.2 part of defoaming agent and 2-15 parts of plasticizer. The elasto-plastic well cementing cement slurry can improve the bending resisting strength and the impact resisting strength of the cement stone and reduce the elastic modulus of the cement stone. Under high temperature and high pressure, the brittle deformation of the elasto-plastic well cementing cement slurry is converted into the plastic deformation, thus the later exploitation is guaranteed, and the service life of the oil-gas well is prolonged.

Description

technical field [0001] The invention relates to cement, in particular to well cementing cement slurry and a preparation method thereof. Background technique [0002] In the process of oil and gas well development, cement stone is a brittle material with inherent microscopic defects, and has inherent defects such as low tensile strength, poor fracture resistance and low impact strength. The downhole cement sheath is affected by the high-energy flow of the perforating bullet, and it bears the impact pressure of 3-4Gpa in an instant, and its stress wave forms a tensile high-stress area in the cement sheath locally. , the cement sheath will break and form macroscopic cracks. Subsequent production stimulation measures during the development of oil and gas wells further expanded these cracks, and even completely failed the sealing effect of the cement sheath, resulting in interlayer channeling of underground fluids (oil, gas, water). If this happens in production wells, oil and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467
Inventor 曹智付洪琼史芳芳
Owner 成都欧美克石油科技股份有限公司
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