Drag reducing agent of aqueous fracturing fluid, preparation method and application thereof
A water-based fracturing and drag reducing agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low concentration and low drag reduction rate of surfactant drag reducing agent.
Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] One of the technical problems to be solved by the present invention is the low drag reduction rate of surfactant drag reducers in the prior art. A new water-based fracturing fluid drag reducer is provided, which is used for water The base fracturing fluid has the advantages of high resistance reduction rate and low concentration
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0048] The product tetrapolycationic surfactant 12-2-12-2-12-2-12 obtained in Comparative Example 2 was mixed with sodium benzenesulfonate in equal mass ratios. Dissolved in water to obtain a clear solution of 1000ppmw, tested the drag reduction rate at 25°C, and the drag reduction rate remained at 60%.
Embodiment 2
[0050] The product tetrapolycationic surfactant 12-2-12-2-12-2-12 that comparative example 2 obtains is mixed with sodium benzoate in equal mass ratios. Dissolved in water to prepare a clear solution of 1000ppmw, tested the drag reduction rate at 25°C, and the drag reduction rate remained at 75%.
Embodiment 3
[0052] The product tetrapolycationic surfactant 12-2-12-2-12-2-12 obtained in Comparative Example 2 was mixed with sodium salicylate in equal mass ratios. Dissolved in water to prepare a clear solution of 1000ppmw, tested the drag reduction rate at 25°C, and the drag reduction rate remained at 80%.
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
Login to View More Abstract
The invention relates to a drag reducing agent of an aqueous fracturing fluid, a preparation method and an application thereof and mainly solves the problems of a low drag reducing rate of a surfactant drag reducing agent in the prior art. In the invention, a cationic surfactant represented as the formula (I) and an organic acid salt are employed, wherein the R is a saturated or unsaturated aliphatic group being 8-24 in carbon atom number; R1, R2 and R6 are independently selected from alkyl groups having 1-4 carbon atoms or hydroxyalkyl groups having 2-4 carbon atoms; R3, R4 and R5 are independently selected from alkylene groups having 1-6 carbon atom number; and D is one selected from halogen ions. The weight ratio of the cationic surfactant to the organic acid salt is 1:(1-50). The organic acid salt is selected from at least one of aliphatic carboxylates, aliphatic sulfonates and aromatic salts. The technical scheme solves the technical problems well. The drag reducing agent can be used for fracturing exploitation of shale gas.
Description
technical field [0001] The invention relates to a water-based fracturing fluid drag reducer and its preparation method and application. Background technique [0002] Shale gas reservoirs generally belong to ultra-low porosity and low permeability reservoirs, and the permeability is 2-3 orders of magnitude lower than that of tight clastic gas reservoirs. For such gas reservoirs, fracturing is an important aspect of exploration and development. means. The fracturing technology suitable for mining low-permeability and low-porosity unconventional reservoirs has been more and more applied in the exploitation of shale gas reservoirs. However, the injected water is hindered by the flow shear stresses in the pipes as well as in the rock formation, and the fluid displacement is greatly reduced. Effectively reducing the friction of the liquid can reduce the demand for equipment and reduce the construction cost to a certain extent. Therefore, in order to reduce friction, it is gener...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
Inventor 喻德峰翟晓东张卫东沙鸥李应成
Owner CHINA PETROLEUM & CHEM CORP