Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for enhancing the emulsification stability of oil-based drilling fluid

An oil-based drilling fluid, emulsion stability technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor stability, and achieve strong emulsion stability, good for wellbore stability, and environmental friendliness. Effect

Active Publication Date: 2016-02-17
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the poor stability of emulsifiers using surfactants and provide a method for enhancing the emulsification stability of oil-based drilling fluids

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] As the best embodiment of the present invention, the ratio of nanomaterials to emulsifier is 1:5~0.5, and the rest is oil and water. Organic earth, oil-based fluid loss agent, wetting agent, Tackifier and weighting agent, but the premise is that it does not affect the performance described in this patent;

[0020] Based on the total mass percentage of oil-based drilling fluid, the emulsifier is 1 to 4%, the nano material is 0.1 to 5%, and the rest is oil phase and water phase.

[0021] Emulsifiers can be selected as: Span80, calcium oleate, calcium stearate, a single component or a mixture of each other in any ratio; the ratio of oil phase to water is 75:25-90:10.

[0022] Raw materials, equipment and sources:

[0023] Hydrophilic nano silica particles (30-40nm): Boyu Hi-Tech New Material Technology Co., Ltd.

[0024] Hydrophilic nano calcium carbonate particles (40-60nm): Boyu Hi-Tech New Material Technology Co., Ltd.

[0025] Hydrophilic nano titanium dioxide (20-30nm): Boyu Hi...

Embodiment 2

[0034] As another preferred embodiment of the present invention, its components and proportions are:

[0035] Emulsifier Span80: 2%, hydrophilic nano calcium carbonate particles: 0.5%, calcium chloride aqueous solution: 15%, diesel oil 82.5%, oil-based drilling fluid is formed after high-speed stirring, and the demulsification voltage is determined to be 245V and heated at 80℃ The demulsification voltage was determined to be 340V. If the hydrophilic nano calcium carbonate particles are not added, the oil-based drilling fluid with the same other conditions has a demulsification voltage of 143V before hot rolling and 183V after hot rolling. The rest is the same as in Example 1.

Embodiment 3

[0037] As another preferred embodiment of the present invention, its components and proportions are:

[0038] Emulsifier calcium stearate: 2%, hydrophilic nano calcium carbonate particles: 0.5%, calcium chloride aqueous solution: 15%, diesel oil 82.5%, oil-based drilling fluid is formed after high-speed stirring, and the demulsification voltage is determined to be 155V at 80 The demulsification voltage was determined to be 386V after hot rolling at ℃. If the hydrophilic nano calcium carbonate particles are not added, the oil-based drilling fluid with the same other conditions has a demulsification voltage of 117V before hot rolling and 125V after hot rolling. The rest is the same as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for enhancing emulsifying stability of an oil-based drilling fluid. The method comprises the steps: during preparation of the oil-based drilling fluid, after adding an emulsifier, adding a hydrophilic nano-material with the mass of 0.1%-5% of that of the oil-based drilling fluid and with the mass ratio of the nano-material to the emulsifier of 1:5-0.5, stirring uniformly, and then investing to use. The oil-based drilling fluid has the characteristics of high temperature resistance and salt resistance, is conducive to the well wall stability, has good lubricity and small degree of damage to an oil gas bed, has the human body poisonous effect far less than a surfactant, and alleviates the harm of the oil-based drilling fluid emulsifier to on-site operating personnel.

Description

Technical field [0001] The invention relates to a method for enhancing the emulsion stability of oil-based drilling fluids, which is particularly suitable for water-in-oil and oil-based drilling fluids, and can be used as drilling deep wells, ultra-deep wells, highly inclined directional wells, horizontal wells and water-sensitive complex formations. Important means. Background technique [0002] Oil-based drilling fluid is a drilling fluid with oil as the continuous phase. In all oil-based drilling fluids, the water content should not exceed 10%; while in water-in-oil drilling fluids, water is evenly dispersed in the diesel as an essential component, and its water content is generally 10-60%. Since the drilling fluid contains two phases of oil and water, the drilling fluid needs to add an emulsifier to disperse the water into the oil phase. The emulsification stability of oil-based drilling fluids is an important indicator in its application. At present, surfactants are used a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/36
CPCC09K8/03C09K8/36C09K2208/10
Inventor 罗陶涛欧阳伟刘翔王兰王睿李巍
Owner BC P INC CHINA NAT PETROLEUM CORP