Pickering emulsion fracturing fluid as well as preparation method and application thereof

A hydraulic and emulsion technology, which is applied in the field of fracturing fluid, can solve the problems of formation pollution, pumping requirements and high demand for water resources, etc., achieve good anti-swelling performance, simplify hydraulic fracturing operations, and improve fracturing effects.

Active Publication Date: 2018-04-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although slick water fracturing has strong fracture creation ability and low economic cost, the strong fluid loss in the reservoir makes the fractures easy to close, and it needs to make up for the...

Method used

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  • Pickering emulsion fracturing fluid as well as preparation method and application thereof
  • Pickering emulsion fracturing fluid as well as preparation method and application thereof
  • Pickering emulsion fracturing fluid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A Pickering emulsion fracturing fluid is an oil-in-water Pickering emulsion composed of solid particles, oil phase and water, the solid particles are dispersed in the interface between the water phase and the oil phase, and the volume ratio of the oil phase to water is 2: 3. Solid particles account for 2.5% of the total mass of oil and water.

[0041] The oil phase is biodiesel, the hydrocarbons are octane, and the solid particles are barium sulfate particles.

[0042] Pickering emulsion fracturing fluid has the characteristics of high viscosity; the viscosity of emulsion fracturing fluid decreases with the increase of shear rate, but even at high shear rate, the emulsion viscosity can still meet the requirements of fracturing fluid; high viscosity can reduce The injection displacement of the fracturing fluid can avoid large friction loss under high displacement and protect the equipment; at the same time, the higher viscosity can reduce the fluid loss.

Embodiment 2

[0044] A kind of Pickering emulsion fracturing fluid, described in embodiment 1, the difference is:

[0045] The hydrocarbons are a mixture of octane and heptane.

Embodiment 3

[0047] A kind of Pickering emulsion fracturing fluid, described in embodiment 1, the difference is:

[0048] The solid particles are silica.

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Abstract

The invention relates to a Pickering emulsion fracturing fluid as well as a preparation method and application thereof. The Pickering emulsion fracturing fluid utilizes Pickering emulsion with stablesolid particles and realizes a dual technique of crack formation and placement of a propping agent at the same time, the defects that the traditional hydraulic fracturing propping agent is larger in particle size and can not enter tiny cracks in a remote well zone and settlement can be extremely easily caused are overcome, a link of injecting the propping agent is eliminated, and a hydraulic fracturing operation is simplified, so that cracks produced in a fracturing process are stabilized and propped up, and fracturing cost is reduced; and fracturing effect is greatly improved, and productioncapacity is greatly increased.

Description

technical field [0001] The invention relates to a Pickering emulsion fracturing fluid and a preparation method and application thereof, belonging to the technical field of fracturing fluids. Background technique [0002] Tight unconventional reservoirs are characterized by low porosity and low permeability, making exploration and development difficult. The slick water fracturing fluid system is a fracturing fluid system developed for the stimulation of tight unconventional reservoirs. It refers to the fracturing fluid composed of a certain amount of proppant and a very small amount of drag reducer, clay stabilizer, drainage aid, etc. added to clean water. Slippery water fracturing fluid has the characteristics of low viscosity and low friction, and has been widely used in the United States and Canada, gradually replacing traditional gel fracturing fluid. [0003] However, the slick water fracturing technology in the prior art generally has the problems of insufficient prop...

Claims

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Application Information

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IPC IPC(8): C09K8/66C09K8/80C09K8/84
CPCC09K8/665C09K8/80C09K8/845C09K2208/12
Inventor 刘德新朱彤宇史晓斐邵明鲁张芳严毅成邱小龙冯绪宝
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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