Expansion oil well cement with temperature resistance

An oil well cement and performance technology, applied in the field of expanded oil well cement, can solve problems such as inability to solve various complex conditions, inability to meet cementing requirements, etc., achieve good salt resistance and compatibility, improve expansion ratio and elastic modulus, The effect of reducing permeability

Inactive Publication Date: 2014-04-23
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only using conventional cement slurry systems can not only meet the cementing requirements of special wells such as gas storages, but also cannot solve various complex conditions e

Method used

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  • Expansion oil well cement with temperature resistance
  • Expansion oil well cement with temperature resistance
  • Expansion oil well cement with temperature resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The cement slurry system formula used in the experiment is as follows:

[0030] 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g microsilica powder+10g polyurethane elastomer+5gHPAM+3.0g GH-9 high temperature retarder+4g TW-200L high temperature fluid loss additive.

[0031] The test was carried out according to the particle size of the polyurethane elastomer, and the results are shown in Table 1.

[0032] Table 1 The influence of different polyurethane elastomer particle size on the mechanical properties of cement stone

[0033]

[0034]

Embodiment 2

[0036] The cement slurry system formula used in the experiment is as follows:

[0037] Formula 1: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro-silica powder+5g polyurethane elastomer (60 mesh)+5gHPAM+3.0g GH-9 high temperature retarder+4g TW-200L high temperature drop Water loss agent.

[0038] Formula 2: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro-silica powder+10g polyurethane elastomer (60 mesh)+5gHPAM+3.0g GH-9 high temperature retarder+4gTW-200L high temperature loss reduction Water agent.

[0039] Formula 3: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro-silica powder+15g polyurethane elastomer (60 mesh)+5gHPAM+3.0g GH-9 high temperature retarder+4gTW-200L high temperature loss reduction Water agent.

[0040] Among them, the high temperature retarder GH-9 is produced in Tianjin Boxing; the high temperature fluid loss reducer TW-200L is produced in Henan Weihui. HPAM is an anio...

Embodiment 3

[0048] The effect of high temperature retarder on the consistency of cement slurry. The cement slurry system formula used in the experiment is as follows:

[0049] Formula 1: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro silica powder+10g polyurethane elastomer (60 mesh)+5gHPAM+4g TW-200L high temperature fluid loss additive.

[0050] Formula 2: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro-silica powder+10g polyurethane elastomer (60 mesh)+5gHPAM+1.0g GH-9 high temperature retarder+4gTW-200L high temperature loss reduction Water agent.

[0051] Formula 3: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro silica powder+10g polyurethane elastomer (60 mesh)+5gHPAM+2.0g GH-9 high temperature retarder+4gTW-200L high temperature loss reduction Water agent.

[0052] Formula 4: 500g Jiajiang G-grade oil well cement+317mL water+150g silica powder+25g micro silica powder+10g polyurethane elastomer ...

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Abstract

The invention discloses an expansion oil well cement with temperature resistance, and relates to the technical field of oil well cement manufacturing of oil and gas well cementing, a certain amount of a polyurethane elastic component is added to oil well cement slurry and is uniformly mixed, by use of the expansion characteristics of the polyurethane elastic component, and oil well cement slurry which can block off cracks and micro annular space gaps and can ensure low permeability of set cement, can be formed at high temperature and under high pressure. The expansion oil well cement with the temperature resistance solves the problem that oil well cement is poor in strain resistant capacity, and can effectively extend the life of oil wells. The expansion oil well cement with the temperature resistance is stable in performance at room temperature and high temperature (150 DEG C), good in rheological property, and controllable in thickening time, and the set cement gas detection permeability is lower than 0.05mD.

Description

Technical field [0001] The invention relates to the field of oilfield drilling and cementing, in particular to an expansion oil well cement with temperature resistance. Background technique [0002] With the continuous deepening of petroleum exploration and development, the number of wells with special requirements gradually increases, and the requirements for cementing are getting higher and higher. The use of conventional cement slurry system not only cannot meet the cementing requirements of special wells such as gas storage, but also cannot solve various complex conditions encountered in the cementing process. The development of a cement slurry system with better comprehensive performance can effectively promote cementing technology development of. [0003] Patent publication number CN101607807 invented a polyurethane cement composite grouting material, which improves the curing and water blocking effects of cement mortar. Patent Publication No. CN101805149A provides a polyur...

Claims

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Application Information

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IPC IPC(8): C09K8/493
CPCC09K8/487C04B28/00C09K8/426C04B24/2652
Inventor 高飞宋元洪钟福海党冬红和建勇张玉平尹璇蒋世伟
Owner CNPC BOHAI DRILLING ENG
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