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A kind of functional composite emulsion polymer fracturing fluid and its preparation method

A composite and polymer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of slow dissolution rate and unsuitability for large-scale fracturing, and achieve rapid dissolution, good promotion and application prospects, suspension good sand effect

Active Publication Date: 2018-08-10
SHENGLI OILFIELD SHENGLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention is polymerized by solution method, and the product state is dry powder, which dissolves slowly and is not suitable for large-scale fracturing

Method used

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  • A kind of functional composite emulsion polymer fracturing fluid and its preparation method
  • A kind of functional composite emulsion polymer fracturing fluid and its preparation method
  • A kind of functional composite emulsion polymer fracturing fluid and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: First preparation: functional composite emulsion polymer fracturing fluid thickener

[0051] (1) Add 396g of deionized water to a 1000ml beaker, start stirring, add 181g of acrylamide, 65.6g of acrylic acid, 14.48g of 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamidotetradecyl Sodium sulfonate 4g, after being completely dissolved, neutralized with potassium hydroxide to pH = 6.8-7.0, then added 0.06g disodium EDTA, 0.15g sodium formate, 0.045g ammonium persulfate, prepared into water phase for later use.

[0052] (2) Add 250g of white oil, 15g of Span80, 5.5g of Tween80, and 0.35g of azobisisobutyronitrile into a 500ml beaker, stir well to prepare an oil phase.

[0053] (3) Put the prepared oil phase and water phase into the high-speed emulsifier, start the emulsifier, and the emulsification time is 20-30s to form an emulsion.

[0054] (4) Put the emulsified emulsion in a 1000ml reactor, pass nitrogen to remove oxygen for 20 minutes, control the initia...

Embodiment 2

[0062] Firstly, a functional compound emulsion polymer fracturing fluid thickener was prepared

[0063] (1) Add 396g of deionized water to a 1000ml beaker, start stirring, add 181g of acrylamide, 58.36g of acrylic acid, 21.72g of 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamidotetradecyl After 4g of sodium sulfonate is completely dissolved, neutralize with potassium hydroxide to pH=6.8-7.0, then add 0.06g of disodium EDTA, 0.15g of sodium formate, and 0.045g of ammonium persulfate, and make it into a water phase for later use.

[0064] (2) Add 250g of white oil, 15g of Span80, 5.5g of Tween80, and 0.35g of azobisisobutyronitrile into a 500ml beaker, stir well to prepare an oil phase.

[0065] (3) Put the prepared oil phase and water phase into the high-speed emulsifier, start the emulsifier, and the emulsification time is 20-30s to form an emulsion.

[0066] (4) Put the emulsified emulsion in a 1000ml reactor, pass nitrogen to remove oxygen for 20 minutes, control the ...

Embodiment 3

[0074] (1) Add 402g of deionized water to a 1000ml beaker, start stirring, add 181g of acrylamide, 51.14g of acrylic acid, 28.96g of 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamidotetradecyl Sodium sulfonate 4g, after completely dissolving, neutralize with potassium hydroxide to pH=6.8-7.0, then add disodium EDTA 0.06g, sodium formate 0.15g, ammonium persulfate 0.045g, and make water phase for later use.

[0075] (2) Add 250g of white oil, 15g of Span80, 5.5g of Tween80, and 0.35g of azobisisobutyronitrile into a 500ml beaker, stir well to prepare an oil phase.

[0076] (3) Put the prepared oil phase and water phase into the high-speed emulsifier, start the emulsifier, and the emulsification time is 20-30s to form an emulsion.

[0077] (4) Put the emulsified emulsion in a 1000ml reactor, pass nitrogen to remove oxygen for 20 minutes, control the initiation temperature to 30°C, add the prepared ammonium persulfate dropwise, after initiation, control the temperature belo...

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Abstract

The invention relates to the technical field of oil exploitation and especially relates to a functional composite-type emulsion-state polymer fracturing fluid and a preparation method thereof. The improved functional composite-type emulsion-state polymer fracturing fluid is composed of following raw materials, by mass: 0.8-5 parts of a thickening agent, 0.01-0.05 parts of a gel breaker and 95-99 parts of water. The thickening agent is an anionic polyacrylamide W / O emulsion. The gel breaker is one of ammonium persulfate capsules or potassium persulfate capsules. The fracturing fluid, compared with a conventional fracturing fluid, can achieve the fracturing effects of the conventional fracturing fluid without addition of any aids, such as a sterilizing agent, a corrosion inhibitor, a discharge aiding agent, a pH regulator and the like. The fracturing fluid is simple in construction process, allows continuous on-site blending and is more suitable for large-scale fracturing.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a functional composite emulsion polymer fracturing fluid and a preparation method thereof. Background technique [0002] There are many types of oil reservoirs in my country, with different depositional environments, different reservoir physical properties, different reservoir temperatures, different crude oil properties, and ever-changing reservoir water properties. By the end of 2000, the comprehensive water content of oilfields in the eastern region of my country had reached 86.4%, and the recovery rate of recoverable reserves had reached 65.4%. Overall, the oilfields had entered the stage of total production decline in the middle and late stages of development. From 1900 to 2000, oilfield production dropped by 1.28 million tons. The Bohai Bay Basin includes six major oilfields: Liaohe, Dagang, Huabei, Shengli, Jidong and Zhongyuan. The oil production in the Bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C09K8/92
CPCC09K8/68C09K8/882C09K8/92C09K2208/26
Inventor 顾行彦冯玉军吕永利张胜张云山刘虎子
Owner SHENGLI OILFIELD SHENGLI CHEM