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Foaming flowback agent for oil field fracturing and application thereof

A foaming flowback, oil field fracturing technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of wax, colloid, asphaltene, etc. in fracturing fluid filter cake and formation

Active Publication Date: 2021-07-06
山东滨州昱诚化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the fracturing effect, the current method is to add drainage aids, clay stabilizers, demulsifiers and other additives to solve the problems of flowback, stable formation, and crude oil demulsification, but it cannot solve the problems of fracturing fluid filter cake and formation There are problems with waxes, gums, and asphaltenes

Method used

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  • Foaming flowback agent for oil field fracturing and application thereof
  • Foaming flowback agent for oil field fracturing and application thereof
  • Foaming flowback agent for oil field fracturing and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of agent A: first put 65% of water into the reaction kettle, add 30% sodium nitrite to make it completely dissolved, then add 5% of fast penetrating agent T, stir well to make agent A;

[0049] Preparation of agent B: first put 71.5% of water into the reaction kettle, add 18% of ammonium chloride to dissolve it completely, then add 3% of ammonium persulfate, then add 1% of 1231 surfactant, 1.2% of the 1631 surfactant, 1.3% of the ABS surfactant, 2% of the AOS surfactant and 2% of the coconut oil diethanolamide 6501 were stirred evenly to make agent B.

[0050] At room temperature, after mixing 100mL of Agent A and Agent B, put 1g of 57# white wax ball into it, the highest reaction temperature can reach 95℃, and the maximum bubble volume can reach 3200mL. After stirring, the wax presents fine particles and is evenly dispersed.

Embodiment 2

[0052] Preparation of Agent A: First, put 64.5% of water into the reaction kettle, add 35% of sodium nitrite to dissolve it completely, then add 0.5% of fast penetrating agent T, stir well to make Agent A;

[0053] Preparation of agent B: first put 65.5% of water into the reaction kettle, add 25% of ammonium chloride to dissolve it completely, then add 3% of 1231 surfactant, 2% of 1631 surfactant, 3 % of ABS surfactant, 1% of AOS surfactant and 0.5% of coconut oil diethanolamide 6501, stirred evenly to make agent B.

[0054] At 65°C, after mixing 100mL of Agent A and Agent B, put 1g of 57# white wax ball, the highest reaction temperature can reach 103°C, and the maximum bubble volume can reach more than 4000mL. After stirring, the wax presents fine particles and is evenly dispersed.

Embodiment 3

[0056]Preparation of agent A: first put 66% of water into the reaction kettle, add 32% of sodium nitrite to make it completely dissolved, then add 2% of fast penetrating agent T, stir well to make agent A;

[0057] Preparation of agent B: first put 54.9% of water into the reaction kettle, add 22% of ammonium chloride to dissolve it completely, then add 0.6% of ammonium persulfate, then add 10% of 1231 surfactant, 1% of 1631 surfactant, 2.5% of ABS surfactant, 6% of AOS surfactant and 3% of coconut oil diethanolamide 6501 were stirred evenly to make Agent B.

[0058] At room temperature, after mixing 100mL of Agent A and Agent B, put 1g of 57# white wax balls into it, the highest reaction temperature can reach 93°C, and the maximum bubble volume can reach 3800mL. After stirring, the wax presents fine particles and is evenly dispersed.

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Abstract

The invention relates to the technical field of chemical additives for oilfield fracturing and acidification, in particular to a foaming flowback agent for oilfield fracturing and its application. The foaming flowback agent is composed of A agent and B agent, and the A agent It includes sodium nitrite and fast penetrating agent T, and the B agent includes ammonium chloride, persulfate and surfactant; the foaming flowback agent can be used for deblocking and flowback of oil wells with water content not exceeding 50%. The foaming flowback agent can not only reduce the formation of fracturing fluid filter cake, but also remove wax, colloid, and asphaltenes, increase flowback capacity, stabilize formation clay, reduce oil-water surface interfacial tension, and improve fracturing performance. Effect.

Description

technical field [0001] The invention relates to the technical field of chemical additives for oilfield fracturing and acidification, in particular to a foaming flowback agent for oilfield fracturing and its application. Background technique [0002] Fracturing is one of the main technologies for increasing production and injection in oilfields, and is widely used in oilfields. At the same time, the injection of fracturing fluids also brings damage to formations, such as the formation of filter cakes of fracturing fluids. There are also many factors that affect the fracturing effect, such as the larger the fracturing fluid volume, the weaker the flowback capability, the wax, colloid, asphaltene in the formation, and the clogging of crude oil in low-temperature wells. [0003] In order to improve the fracturing effect, the current method is to add drainage aids, clay stabilizers, demulsifiers and other additives to solve the problems of flowback, stable formation, and crude oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524C09K8/584C09K8/68
CPCC09K8/524C09K8/584C09K8/68
Inventor 孙立军刘纪湘郭辉吕鹏宋月晴
Owner 山东滨州昱诚化工科技有限公司
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