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Water-based resistance reducing agent and preparation method thereof

A drag-reducing agent and water-based technology, applied in the field of water-based drag-reducing agent and its preparation, can solve the problems of limited viscosity-increasing effect of inverse emulsion drag-reducing agent, poor base liquid cross-linking effect, and high processing cost, and can eliminate the dissolution rate. Slow and oil phase damage problem, avoid difficult handling, obvious effect of thickening effect

Active Publication Date: 2020-08-28
CHENGDU LEARN PRACTICES TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the drag reducers that can realize online preparation of slick water are mainly inverse emulsion products, and invert emulsion drag reducers have a long time for demulsification and hydration; the oil phase in the emulsion has the problem of oil phase damage to the formation core; at the same time Due to the oil-water emulsion formed by the oil phase in the flowback liquid, the treatment of the flowback liquid is difficult and the treatment cost is high; and the viscosity-increasing effect of the inverse emulsion drag reducer is limited, and the crosslinking effect of the base liquid is poor
[0004] Moreover, the inverse emulsion in the prior art and the suspension using the oil phase, whether it is an inverse emulsion or a liquid dispersion polymer, they all contain an oil phase, and this oil phase exists in the form of droplets in the injection fluid , these oil droplets in the aqueous injection fluid create transport problems in subterranean formations and lead to more complex multiphase flows

Method used

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  • Water-based resistance reducing agent and preparation method thereof
  • Water-based resistance reducing agent and preparation method thereof
  • Water-based resistance reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of water-based drag reducer:

[0042] 1.1 Raw materials: each raw material is calculated in parts by weight, as shown in Table 1 below:

[0043] Table 1 Embodiment 1 raw material list

[0044]

[0045] 1.2 Preparation method:

[0046] Include the following steps:

[0047] S1: Add the solvent, suspending aid and suspending agent into the reaction kettle respectively, stir (stirring speed is 1000r / min) and circulate and shear through the emulsification pump for 1h;

[0048] S2: Add polyacrylamide into the reaction kettle, start stirring (stirring rate is 1300r / min) and circulate shearing by emulsification pump for 1h (circulating shearing speed is 2500r / min), and the finished product is obtained.

Embodiment 2

[0050] Preparation of water-based drag reducer:

[0051] 2.1 Raw materials: each raw material is calculated in parts by weight, as shown in Table 2 below:

[0052] Table 2 Embodiment 2 raw material list

[0053]

[0054] 2.2 Preparation method: same as Example 1.

Embodiment 3

[0056] Preparation of water-based drag reducer:

[0057] 3.1 Raw materials: each raw material is calculated in parts by weight, as shown in Table 3 below:

[0058] Table 3 Embodiment 3 raw material list

[0059]

[0060] 3.2 Preparation method: Same as Example 1.

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PUM

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Abstract

The invention provides a water-based resistance reducing agent and a preparation method thereof, and solves the problems in the prior art that an inverse emulsion resistance reducing agent is long indemulsification hydration time; and an oil phase in the emulsion has the technical problem of damage to the oil phase of the stratum rock core. The preparation method comprises the following raw materials in parts by weight: 20 to 60 parts of a water-soluble thickening agent; 20 to 70 parts of a solvent; 0.2 to 5 parts of a suspension auxiliary agent; and 0.5 to 3 parts of a suspending agent. Thewater-based resistance reducing agent not only has the advantages of environmental protection and low harm, but also can realize integrated operation and online blending.

Description

technical field [0001] The invention relates to a water-based drag reducing agent, in particular to a water-based drag reducing agent and a preparation method thereof. Background technique [0002] my country's shale gas reserves reach 31.6 trillion cubic meters, ranking first in the world. The shale gas resources and recoverable reserves in the Sichuan Basin rank first in the country, with huge mining potential. [0003] Domestic shale gas mainly chooses large-scale fracturing hydraulic fracturing methods in the fracturing process, and basically forms slick water fracturing in the fracturing pumping mode, slick water + linear glue + jelly slug fracturing, slick water + Three fracturing modes: linear gel + jelly combined with slug + continuous sand addition; during the fracturing process, it is necessary to adjust the type and performance of the fracturing fluid in real time and quickly according to the reservoir conditions. At present, the drag reducers that can realize on...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/88
CPCC09K8/68C09K8/88C09K8/887
Inventor 任山郭建春鲁智勇马应娴路千里唐朝钧苟波王继宇张绍彬刘彧轩刘斌康毅刁素
Owner CHENGDU LEARN PRACTICES TECH CO LTD
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