Salt-resistant and acid-resistant concentrated foaming agent as well as preparation method and application thereof

A technology of foaming agent and surfactant, applied in the field of foaming agent, can solve the problems that the foam drainage and gas recovery process cannot be effectively solved and cannot be used normally, and achieve a wide range of operating temperature, rich and delicate foam, and a wide range of application fields Effect

Inactive Publication Date: 2014-11-05
安徽奔马先端科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the development of water and gas fields, with the production of natural gas, formation water and condensate oil continue to enter the wellbore along with the natural gas, and then the production and transportation of gas wells are faced with high temperature, high condensate oil content, high salinity and other drainage and gas production problems. The conventional foam drainage gas recovery process cannot be effectively solved due to the lack of good foaming agents, and most of the gas fields in my country have a very low surface temperature in winter, which can reach -20~-30°C. The general foaming agent is here It will freeze at high temperature and cannot be used normally. There is an urgent need for a new type of foaming agent that is resistant to extreme temperatures and high salinity

Method used

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  • Salt-resistant and acid-resistant concentrated foaming agent as well as preparation method and application thereof
  • Salt-resistant and acid-resistant concentrated foaming agent as well as preparation method and application thereof
  • Salt-resistant and acid-resistant concentrated foaming agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Concentrated salt-resistant and acid-resistant foaming agent, including the following components by weight: 33% cocamidopropyl betaine, 5% lauryl amidopropyl hydroxy sultaine, ethylene didecanol Polyoxyethylene ether ammonium chloride 1.7%, water 60.3%.

[0036] The preparation method is as follows: under normal temperature and pressure, cocamidopropyl betaine, oleamidopropyl hydroxy sultaine and ethylene didodecanol polyoxyethylene ether ammonium chloride are added to the reaction kettle according to a certain proportion, and then Then add water and stir thoroughly for 2-3 hours until completely mixed evenly, which is the acid-resistant and salt-resistant concentrated foaming agent.

[0037] The performance of the foaming agent solution was tested. At a concentration of 0.1%, the temperature range can be stabilized at -30 to 120°C; the salt resistance can reach 1.8×104mg / L; use the stirring method (GJ-3S high-speed agitator, rotating speed 9000±200 rpm) to measure th...

Embodiment 2

[0039] Salt-resistant and acid-resistant concentrated foaming agent, including the following components by weight: 38.6% dodecylamide hydroxypropyl sulfobetaine, 6.2% dodecylbishydroxyethylmethyl ammonium chloride, Water 55.2%.

[0040] Its preparation method is identical with embodiment 1.

[0041] The performance of the foaming agent solution was tested. At a concentration of 0.1%, the temperature range can be stabilized at -30 to 120°C; the salt resistance can reach 1.8×104mg / L; use the stirring method (GJ-3S high-speed stirrer, rotating speed 9000±200 rev / min) to measure the foaming performance and foam stabilizing performance of the foaming agent, and the foaming foam quality is 77.1%, and the foam half-life is above 355min , the drainage half-life is 9.1min; the oil-water interfacial tension is 0.173mN / m.

Embodiment 3

[0043] Salt-resistant and acid-resistant concentrated foaming agent, including the following component ratios by weight: oleic acid amidopropyl betaine 28%, cetyl amidopropyl hydroxy sultaine 11%, dodecyl dihydroxy sulfobetaine Ethyl methyl ammonium chloride 2.2%, water 58.8%.

[0044] Its preparation method is identical with embodiment 1.

[0045] The performance of the foaming agent solution was tested. At a concentration of 0.1%, the temperature range can be stabilized at -30 to 120°C; the salt resistance can reach 1.8×104mg / L; use the stirring method (GJ-3S high-speed agitator, rotating speed 9000 ± 200 rpm) to measure the foaming performance and foam stabilizing performance of the foaming agent, and the foaming foam quality is 77.1%, and the foam half-life is above 352min , the drainage half-life is 9.3min; the oil-water interfacial tension is 0.175mN / m.

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Abstract

The invention discloses a salt-resistant and acid-resistant concentrated foaming agent as well as a preparation method and application thereof. The foaming agent consists of 20-45 percent of a zwitterionic surfactant, 1-10 percent of a cation surfactant and water. The preparation method comprises the following steps: adding the components of the weight percentages into a reaction kettle respectively in sequence; stirring the mixture at the normal temperature for 2-3 hours; and fully reacting the materials in the reaction kettle to obtain the salt-resistant and acid-resistant concentrated foaming agent. The salt-resistant and acid-resistant concentrated foaming agent has the advantages of high foaming ability, high foam stability, salt resistance, acid resistance, wide temperature range and the like at a low use concentration, is suitable for a foam fracturing process as well as the processes of oil production, gas production, drainage and the like of oil-gas coproduction wells and gas-water coproduction wells, and is applied to well repair and sand wash operation. The preparation method has the advantages of adoption of readily-available raw material, easiness and convenience in operation, low requirements on the environment and equipment, and easiness in realizing industrial production and large-scale application.

Description

technical field [0001] The invention relates to a foaming agent, in particular to a salt-resistant and acid-resistant concentrated foaming agent and its preparation method and application. Background technique [0002] Fracturing and acidizing is carried out in carbonate rocks, which can stimulate a large area of ​​low-permeability oil and gas reservoirs, and foam acid has a better acidizing effect than conventional acidizing. Foam acid requires the selection of appropriate foaming agent and foam stabilizer, which can increase surface dryness and increase foam stability. However, the current foams are weak in acid resistance and stability, and cannot be prepared well for foam acid preparation. [0003] The main oilfields in my country have entered the stage of high water cut in the late stage of secondary oil recovery, and there is an urgent need for a new, cheap, and efficient oil displacement system. The foam fluid with excellent performance can increase the oil displacem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/94C09K8/584C09K8/52C09K8/518
CPCC09K8/602C09K8/536C09K8/584C09K8/74C09K8/94
Inventor 邱建兴章晶侯超东花林
Owner 安徽奔马先端科技有限公司
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