Self-crosslinking high-sand-carrying cleaning quick water and preparation method thereof

A slick water and self-crosslinking technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor sand-carrying effect and achieve good sand-carrying effect, good effect and excellent sand-carrying performance

Active Publication Date: 2019-06-14
SICHUAN JIEBEITONG ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of self-crosslinking high-sand-carrying cleaning agent for conventional slick water fracturing fluids that need to add various agents such as drag reducers, anti-swelling agents, and drainage aids, and have poor sand-carrying effects. slippery water

Method used

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  • Self-crosslinking high-sand-carrying cleaning quick water and preparation method thereof
  • Self-crosslinking high-sand-carrying cleaning quick water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take the preparation of 200 grams of drag reducer as an example, which is used to prepare self-crosslinking high sand-carrying clean slippery water.

[0026] To prepare the drag reducer, the steps are as follows:

[0027] Step 1. Prepare the external phase solution: mix 30 grams of polylactide, 30 grams of propylene glycol ether acetate and 4 grams of zirconium lactate, and stir evenly to obtain the external phase solution;

[0028] Step 2. Prepare the internal phase solution: mix 80 grams of water, 40 grams of 2-acrylamido-2-methylpropanesulfonic acid and 14 grams of diethylbutylamine, and stir evenly to obtain the internal phase solution, which is set aside;

[0029] Step 3. Pour the external phase solution into a 250mL three-necked flask, place the three-necked flask in a constant temperature water bath at 30°C, and keep stirring; then slowly drop the internal phase solution into the external phase solution, make it fully mixed, and prepare the base After stirring f...

Embodiment 2

[0032] The preparation method of the above-mentioned self-crosslinking high sand-carrying clean slippery water comprises the following steps:

[0033] Step 1. Prepare the external phase solution: mix 150 grams of glycolide-lactide copolymer, 100 grams of propylene glycol methyl ether acetate and 19.5 grams of bistriethanolamine bisisopropyl zirconate, and stir evenly to obtain the external phase solution;

[0034] Step 2. Prepare the internal phase solution: mix 300 grams of water, 100 grams of 2-acrylamido-2-methylpropanesulfonic acid and 40 grams of triethylamine, and stir evenly to obtain the internal phase solution, which is set aside;

[0035] Step 3. Pour the external phase solution into the reaction container, place the reaction container in a constant temperature water bath at 40°C, and keep stirring; then slowly drop the internal phase solution into the external phase solution, make it fully mixed, and make a base liquid , stirring with nitrogen at high speed to remov...

Embodiment 3

[0038] The preparation method of the above-mentioned self-crosslinking high sand-carrying clean slippery water comprises the following steps:

[0039] Step 1. Prepare the external phase solution: mix 100 grams of polycaprolactone, 150 grams of propylene glycol butyl ether acetate and 19.5 grams of bisisopropylammonium zirconate double lactate, and stir evenly to obtain the external phase solution;

[0040] Step 2. Prepare the internal phase solution: mix 450 grams of water, 200 grams of 2-acrylamido-2-methylpropanesulfonic acid and 80 grams of diethyloctylamine, and stir evenly to obtain the internal phase solution, which is set aside;

[0041] Step 3. Pour the external phase solution into the reaction container, place the reaction container in a constant temperature water bath at 40°C, and keep stirring; then slowly drop the internal phase solution into the external phase solution, make it fully mixed, and make a base liquid , stirring with nitrogen at high speed to remove ox...

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Abstract

The invention discloses self-crosslinking high-sand-carrying cleaning quick water. The quick water is prepared in the mode that a drag reducer is added into water; the drag reducer is a polymer emulsion which is prepared in the mode that an internal phase solution and an external phase solution generate a double-phase emulsion polymerization reaction under the effect of an initiator; the externalphase solution is prepared from the components of polyester, an environment-friendly solvent and a cross-linking agent; and the internal phase solution is prepared from the components of 2-acrylamido-2-methylpropane sulfonic acid, organic amine and water. The preparation steps comprise: (1) the polyester, the environment-friendly solvent and the cross-linking agent are mixed to obtain the externalphase solution; (2) the water, the 2-acrylamido-2-methylpropane sulfonic acid and the organic amine are mixed to obtain the internal phase solution; and (3) the external phase solution is placed in awater bath of 30-40 DEG C, the internal phase solution is added, after nitrogen is introduced for deoxygenation, the initiator is added, a reactor is sealed, a thermostatic reaction is conducted for4-5 h at 80 DEG C, and the self-crosslinking high-sand-carrying cleaning quick water is obtained. The quick water integrates various functions, can be quickly dissolved and efficiently reduce drag, and has the functions of sterilization, flow back assistance and clay stability synergy.

Description

technical field [0001] The invention relates to the technical field of increasing production in oil and gas fields, in particular to a self-crosslinking high sand-carrying clean slick water and a preparation method thereof. Background technique [0002] Hydraulic fracturing has always been the most effective stimulation technology in the process of oil and gas reservoir exploitation. Conventional oil and gas well reservoir stimulation uses jelly fracturing fluid, while shale gas well reservoir stimulation requires special fracturing fluid, namely slick water fracturing liquid. It is formulated with polymer or ultra-high polymer drag reducer, water, and additives, so that it has low viscosity and low friction performance, thereby greatly reducing mining costs and obtaining very high production capacity. Therefore, slippery water drag reducers are widely used, and the demand is very huge. However, there are a series of problems with drag reducers for slick water fracturing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/88C08F283/02C08F220/58
Inventor 曾斌徐太平周京伟李栓袁发明
Owner SICHUAN JIEBEITONG ENERGY TECH CO LTD
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