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Preparation method of nano plugging agent for plugging oil-gas well

A nano-blocking agent, oil and gas well technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of plugging ability, poor suspension ability, corrosion of rubber parts, low flash point, etc., to protect oil and gas layer, meet market demand, and achieve high commercial performance

Inactive Publication Date: 2020-05-01
南京化学工业园环保产业协同创新有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oil-based drilling fluids and completion fluids were originally formulated with crude oil and diesel oil as continuous phases. They are mainly used to protect oil and gas layers and reduce various complex problems in the drilling process. However, they have low flash points, are volatile, corrode rubber parts, and exist On-site construction safety hazards and other shortcomings
Therefore, it is necessary to solve the problems of poor plugging ability and suspension ability of white oil full oil-based drilling fluid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The invention provides a nano plugging agent for oil and gas well plugging, which has the following components and contents: water: 50-90 parts, soda ash: 8-10 parts, cementing material: 8-9 parts, calcium chloride aqueous solution: 4 parts -6 parts, emulsifier: 11-15 parts, composite plugging agent: 3-6 parts, blending agent: 2-5 parts, methyl methacrylate: 1-2 parts, acrylamide: 3-5 parts, dispersed Agent: 2-3 parts, expansion agent: 4-5 parts, white oil: 110-150 parts, clay: 1-5 parts, surfactant: 1-2 parts and PH regulator: 2-3 parts.

[0018] The method for the nano plugging agent used for oil and gas well plugging comprises the following steps:

[0019] The first step: first mix and stir water, soda ash, clay and calcium chloride aqueous solution, keep the stirring speed at 1000r / min, stir to make it uniform, seal it and let it stand still, obtain the base slurry, carry out maintenance, and mix the cementing material, composite The plugging agent, expansion agent...

Embodiment 2

[0027] The invention provides a nano plugging agent for oil and gas well plugging, which has the following components and contents: water: 50-90 parts, soda ash: 8-10 parts, cementing material: 8-9 parts, calcium chloride aqueous solution: 4 parts -6 parts, emulsifier: 11-15 parts, composite plugging agent: 3-6 parts, blending agent: 2-5 parts, methyl methacrylate: 1-2 parts, acrylamide: 3-5 parts, dispersed Agent: 2-3 parts, expansion agent: 4-5 parts, white oil: 110-150 parts, clay: 1-5 parts, surfactant: 1-2 parts and PH regulator: 2-3 parts.

[0028] The method for the nano plugging agent used for oil and gas well plugging comprises the following steps:

[0029] The first step: first mix and stir water, soda ash, clay and calcium chloride aqueous solution, keep the stirring speed at 1200r / min, stir to make it even, seal and stand still, obtain base slurry, carry out maintenance, and cementing materials, composite The plugging agent, expansion agent and white oil are charg...

Embodiment 3

[0037] The invention provides a nano plugging agent for oil and gas well plugging, which has the following components and contents: water: 50-90 parts, soda ash: 8-10 parts, cementing material: 8-9 parts, calcium chloride aqueous solution: 4 parts -6 parts, emulsifier: 11-15 parts, composite plugging agent: 3-6 parts, blending agent: 2-5 parts, methyl methacrylate: 1-2 parts, acrylamide: 3-5 parts, dispersed Agent: 2-3 parts, expansion agent: 4-5 parts, white oil: 110-150 parts, clay: 1-5 parts, surfactant: 1-2 parts and PH regulator: 2-3 parts.

[0038] The method for the nano plugging agent used for oil and gas well plugging comprises the following steps:

[0039] The first step: first mix and stir water, soda ash, clay and calcium chloride aqueous solution, keep the stirring speed at 1500r / min, stir to make it uniform, seal and stand still, obtain the base slurry, carry out curing, and mix the cementing material, composite The plugging agent, expansion agent and white oil ...

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Abstract

The invention discloses a nano plugging agent for plugging an oil-gas well and a preparation method thereof. The nano plugging agent comprises the following components in parts by weight: 50-90 partsof water, 8-10 parts of sodium carbonate, 8-9 parts of a cementing material, 4-6 parts of a calcium chloride water solution, 11-15 parts of an emulsifier, 3-6 parts of a composite plugging agent, 2-5parts of a blender, 1-2 parts of methyl methacrylate, 1-2 parts of a surfactant and 2-3 parts of a pH regulator. The constant temperature is preferably 25 DEG C. The beneficial effects of the nano plugging agent are that: according to the preparation method of the nano plugging agent, the prepared base slurry interacts with various reagents, finally an emulsifier and a surfactant are added and mixed to obtain the nano plugging agent, the plugging capacity and the rock carrying capacity of the nano plugging agent are enhanced, and the nano plugging agent has the characteristics of safety, environmental protection and hydrocarbon reservoir protection, can be used for multiple times, has no side effect, and can well meet the market requirements at home and abroad.

Description

technical field [0001] The invention relates to the field of oil and gas well reagents, in particular to a preparation method of a nanometer plugging agent for oil and gas well plugging. Background technique [0002] Oil-based drilling fluid refers to the drilling fluid with oil as the continuous phase. Compared with water-based drilling fluid, oil-based drilling fluid has the advantages of high temperature resistance, salt and calcium intrusion resistance, good borehole wall stability, good lubricity and damage to oil and gas layers. At present, it has developed into an important method for drilling highly difficult high-temperature deep wells, highly deviated directional wells, horizontal wells, underbalanced wells and various complex formations, and has a wide range of applications. [0003] Full oil-based drilling fluid refers to a water-in-oil emulsified drilling fluid in an almost anhydrous state with oil as the continuous phase and no more than 10% brine as the disper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/506
CPCC09K8/506
Inventor 王雷
Owner 南京化学工业园环保产业协同创新有限公司
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