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Foaming agent for oil field and preparation method thereof

A foaming agent, oil field technology, applied in the directions of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor foam stabilization effect, low foaming amount, inability to achieve the use effect, etc., and achieve high foaming quality, High foam volume, fine and stable foam

Active Publication Date: 2017-12-19
陕西延长石油油田化学科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a foaming agent for oilfields, which solves the problems that the existing foaming agents for oilfields have low foaming volume, poor foam stabilization effect, and cannot achieve the use effect under high salinity and high temperature conditions.

Method used

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Examples

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Effect test

preparation example Construction

[0019] The present invention also provides a preparation method of the above-mentioned foaming agent for oil fields, which is specifically implemented as follows:

[0020] Step 1. Weigh the following raw materials according to mass percentages: Lauryl dimethyl betaine 10%-20%, lauroamidopropyl betaine 5%-15%, octyldecyl glucoside 3%-10%, butanediol 1%~5%, deionized water 55%~80%, the sum of the above components is 100%;

[0021] Step 2. Add the dodecyl dimethyl betaine weighed in step 1 into the reaction kettle, stir and raise the temperature to 40°C, add lauryl amidopropyl betaine and octdecyl glucoside in sequence, stir for 0.5-1h, and then sequentially Add deionized water and butanediol and continue to stir for 1~2h;

[0022] Step 3. Reduce the stirring speed, add the pH regulator citric acid or sodium carbonate according to the pH of the mixed solution, adjust the pH of the solution to 6-8, and wait until the solution drops to room temperature to obtain a foaming agent.

Embodiment 1

[0024] Weigh 150kg of dodecyl dimethyl betaine into the reaction kettle, stir and heat up to 40°C, add 150kg of lauramidopropyl betaine and 100kg of octdecyl glucoside in turn, stir and continue stirring, stir for 0.7h, then add 550kg in turn The deionized water and 50kg of butanediol were continuously stirred for 1.5h, the stirring speed was reduced, 10kg of citric acid was added, the pH of the solution was adjusted to 6, and the foaming agent was obtained when the solution was cooled to room temperature.

[0025] Take 0.5ml of the above foaming agent and add it to 100ml of deionized water, stir at 9000r / min for 1 minute, and pour it into a 500ml graduated cylinder to observe that the foam volume is 465ml and the half-life is 6.5 minutes. Also take 0.5ml of the above foaming agent and add it to 100ml with a salinity of 20×10 4 In mg / L mineralized water, stir at 9000r / min for 1 minute, pour it into a 500ml graduated cylinder and observe that the foam volume is 465ml and the half-l...

Embodiment 2

[0027] Weigh 200kg of lauryl dimethyl betaine and add it to the reaction kettle, stir and raise the temperature to 40°C, add 100kg of lauramidopropyl betaine and 30kg of octdecyl glucoside in sequence, stir and continue stirring, stir for 0.5h, and then add 640kg in turn The deionized water and 30kg of butanediol were continuously stirred for 1 hour, the stirring speed was reduced, 10kg of sodium carbonate was added, the pH of the solution was adjusted to 8, and the foaming agent was obtained when the solution was cooled to room temperature.

[0028] Take 0.5ml of the above foaming agent and add it to 100ml of deionized water, stir for 1 minute at a speed of 9000r / min, and pour it into a 500ml graduated cylinder to observe that the foam volume is 465ml and the half-life is 7 minutes. Similarly, 0.5ml of the above foaming agent was added to 100ml of deionized water, heated to 130°C, then stirred at 9000r / min for 1 minute, and poured into a 500ml graduated cylinder to observe that t...

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Abstract

The invention discloses a foaming agent for oilfield. The foaming agent is prepared from the following raw materials in percentage by mass: 10%-20% of dodecyl dimethyl betaine, 5%-15% of lauramidopropyl betaine, 3%-10% of caprylyl / capryl glucoside, 1%-5% of butanediol, and 55%-80% of deionized water, wherein the sum of weight percentages of the components is 100%. The invention further discloses a preparation method of the foaming agent. The foaming agent for oilfield can be used for oil-gas field development operation of oil-gas well drilling, oil-gas well pigging and washing, gas well cracking, gas well drainage and gas recovery and the like, especially for the ultralow-permeability oil-gas area in the north of Shanxi province, the foaming agent has a good foaming effect in stratum water with the mineralization degree of 20*10<4>mg / L and the stratum with the temperature of 130DEG C, and has obvious commercial effect in practical site use.

Description

Technical field [0001] The invention belongs to the technical field of oil and gas field development engineering, and relates to a foaming agent for oil fields. The invention also relates to a preparation method of the foaming agent. Background technique [0002] In oil well flushing and well opening operations, it is necessary to add a certain concentration of foaming agent to the flushing fluid, which is beneficial to reduce the surface interfacial tension of the flushing fluid and increase the scope of the well flushing. Reduce the pump pressure, and the generated foam will also carry out insoluble dirt and small particles in the wellbore, thereby improving and restoring the production of the oil well. [0003] Adding foaming agent in the process of gas well gas production is beneficial to reduce the surface tension of formation water and the density of the wellbore liquid column, improve the flow of water and gas, and achieve the purpose of drainage and gas recovery. Reduce th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/536C09K8/584C09K8/70
CPCC09K8/035C09K8/52C09K8/584C09K8/602C09K8/703
Inventor 向礼勇李慧邓永刚
Owner 陕西延长石油油田化学科技有限责任公司
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