An acid-resistant drag-reducing agent and its preparation method and acid-resistant slippery water fracturing fluid system
A technology of drag-reducing agent and water fracturing, which is applied in the field of acid-resistant drag-reducing agent and its preparation, and acid-resistant slick water fracturing fluid system. Reservoir adaptability, fast dissolution performance, low core permeability damage effects
Active Publication Date: 2022-06-03
PETROCHINA CO LTD
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, modified polyacrylamide polymers are generally used as drag reducers in slick water fracturing fluid systems, but this type of system does not have the characteristics of acid resistance, and it cannot be completely degraded at the reservoir temperature after construction, which has a certain impact on the reservoir. degree of injury and other adverse effects
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
preparation example Construction
[0038] The oxidative initiator was a 1%wt potassium persulfate aqueous solution.
Embodiment 1
Embodiment 2
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
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| shear viscosity | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides an acid-resistant drag-reducing agent and its preparation method and an acid-resistant slick water fracturing fluid system. The hydrophobic monomer is introduced into the molecular structure. The fracturing fluid has good temperature resistance under acidic conditions due to the technological requirements of fractures and high sand ratio construction; moreover, this type of thickener has rapid solubility in acid solution, which can meet the technological requirements of industrial construction. The acid-resistant slick water fracturing fluid system prepared by using acid-resistant drag-reducing agent can completely degrade at the reservoir temperature, reducing the damage to the reservoir. low, showing good reservoir adaptability.
Description
Acid-resistant drag-reducing agent and preparation method thereof, and acid-resistant slick water fracturing fluid system technical field The present invention relates to the technical field of recyclable fracturing fluid in oil and gas fields, in particular to a kind of acid-resistant drag-reducing agent and preparation thereof Methods and acid-resistant slickwater fracturing fluid systems. Background technique In recent years, the Changqing Lower Paleozoic tight carbonate gas reservoir has become a key area for increasing reserves and production, and it is also a natural gas reservoir. The focus of exploration and development. However, judging from the current exploration situation, this block has deep burial, poor physical properties, and strong heterogeneity. unfavorable features. In the early stage, based on the concept of volume fracturing, the "multi-component high-displacement multi-stage injection" was developed by optimizing the injection form. System com...
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 Patents(China)
IPC IPC(8): C08F220/60C08F226/10C08F220/28C08F220/26C08F283/06C08F220/58C08F251/00C08F220/56C09K8/68C09K8/88
CPCC08F220/60C08F283/065C08F251/00C08F226/02C09K8/68C09K8/882C09K2208/10C09K2208/28C09K2208/12C08F220/606C08F226/10C08F220/286C08F220/26C08F212/30C08F226/06C08F220/34
Inventor 石华强李宪文丁里张燕明刘晓瑞李小玲刘静孟磊王历历祖凯傅鹏
Owner PETROCHINA CO LTD