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Method for preparing foaming agent used for oil gas field drilling and extracting

A foaming agent, a technology for oil and gas fields, applied in drilling compositions, chemical instruments and methods, organic chemistry, etc., can solve the problems of gas being carried out of the ground, interfere with the smooth progress of drilling, etc., and achieve high conversion rate of tertiary amine, reaction The effect of shortening time and improving surface activity

Inactive Publication Date: 2008-07-09
榆林康隆石油技术服务股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the drilling process, it is inevitable to encounter formation water soaking into the wellbore, and the soaked water and cuttings form mud cakes or agglomerates, which cannot be effectively carried out of the ground by the gas, which seriously interferes with the smooth progress of drilling.

Method used

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  • Method for preparing foaming agent used for oil gas field drilling and extracting

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1. Add 415 grams of 27.5% sodium bisulfite solution in a 1-liter reactor, add 10% NaOH solution 1ml, put the lid on the reactor, heat to 65°C under stirring, then add epichlorohydrin 100 gram, was reacted at 65-75°C for 2.5 hours, and the reactant was aged at 70°C for 1 hour, and 190ml of water was added to obtain 706 grams of 30% 3-chloro-2-hydroxypropyl sodium sulfonate solution.

[0018] In a 1000ml three-necked flask, add 330 grams of 30% 3-chloro-2-hydroxypropyl sodium sulfonate solution, 120 ml of deionized water, and then add 50 grams of anionic surfactant (IV), and heat to 75 ° C. Stir at high temperature for 30 minutes, add 100 grams of dodecyldimethylamine, use phenolphthalein as indicator, add 10% NaOH solution dropwise, control the pH value of the reaction system at 7.5-8.5, and continue to react at 75-95°C After 8 hours, a yellowish viscous liquid was obtained. The free amine value was measured, and the conversion rate of the tertiary amine was ≥99....

example 2

[0019] Example 2. In a 1000ml three-neck flask, add 100 grams of C 12-14 Dimethyl tertiary amine, 190ml deionized water, 30 grams of anionic surfactant (IV), then add 300 grams of 30% 3-chloro-2-hydroxypropyl sodium sulfonate solution prepared in Example 1, and heat to 85°C , and stirred for 1 hour. Use phenolphthalein as an indicator, add 15% NaOH solution dropwise, control the pH value of the reaction system at 7.5-8.5, keep it at 75-95°C and continue the reaction for 8 hours to obtain a relatively viscous liquid, and measure its residual tertiary amine ≤ 0.5%

example 3

[0020] Example 3. Foam performance test. Here, the Waring Blender stirring method is used to test the foam performance of the blowing agent under different conditions. The U.S. petroleum industry often adopts this method, and my country's petroleum industry usually also adopts this method. The instrument used is a Waring-Blender mixer. During the test, add 100ml of test solution into a graduated mixing cup, stir at a high speed (≥5000rpm) for 60s, turn off the switch, and immediately record the foam volume (V), which is used to represent the foaming agent The foaming ability, the larger the V, the stronger the foaming ability. Then record the time (t) required to separate out 50ml of liquid from the foam, called the (drainage) half-life of the foam, reflecting the stability of the foam, the longer t, the more stable the foam. Foaming ability and foam stability are the most important performances of blowing agents, therefore, the values ​​of V and t can better represent the p...

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Abstract

The invention relates to a process for preparing sponging agent which is adopted by oil gas field drills and used in the drilling technology of oil and natural gas and in geothermal drilling wells. The process is the synthetic technology for improving the sponging agent, lowers the producing cost, increases the foamability and the foam stability, and is realized by two-step synthesis. The invention is characterized in that: firstly, adding epoxy chloropropane, sodium bisulfite, deionized water and alkali catalyst into a catalyst case , heating to 60-85 DEG C under mixing, reacting for 2-3 hours, processing reactants into water solution which contains 3-chlorine-2-hydroxypropyl sodium sulfonate whose concentration is 30% with the deionized water after the reactants are aged for 1hour in 70 DEG C, then, adding long-chain tertiary amine into the mixed solution of the water solution which is prepared by the above process, anionic surface active agent and water, heating to 75-95 DEG C under mixing, and reacting for 7-9 hours, preparing the sponging agent which takes N-alkyl-N and N-dimethyl hydroxypropyl sulfo betaine as main components. The reaction time of the invention is greatly shortened, the tertiary amine percent conversion is high, the surfactivity is increased, the foaming performance of the product is good, and the invention can be used for sponging agent formula which is needed in the oil field gas drills.

Description

technical field [0001] The invention relates to an oil and gas field drill with excellent foaming ability and foam stability, which is used in oil and gas drilling and production technology and geothermal drilling, and is especially suitable for the environment of fresh water containing crude oil and hydrocarbons or high-concentration electrolyte. The preparation method of foaming agent is adopted. Background technique [0002] Many oil and gas fields are exploited in the middle and later stages, and the pressure of production layers generally drops. At the same time, many newly discovered oil and gas fields have low reservoir pressure, and the best way to drill such oil and gas fields is to use air drilling. The so-called air drilling is a drilling technology that uses air and nitrogen as the circulating medium. Due to the low gas density, the hydrostatic pressure of fluid in the well is much lower than that of conventional drilling fluid, and an underpressure difference ...

Claims

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Application Information

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IPC IPC(8): C09K8/38C07C309/08B01F17/02C09K23/02
Inventor 赵晓东孟英峰
Owner 榆林康隆石油技术服务股份有限公司
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