High-temperature-resistant salt-tolerant filtrate loss reducer and preparation method thereof
A fluid loss reducing agent, high temperature resistant technology, applied in the field of oil resource exploration and development, can solve problems such as wellbore instability, achieve the effect of reducing fluid loss, excellent fluid loss reduction performance, and solving wellbore instability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] This embodiment provides a high temperature resistant, salt tolerant fluid loss control agent, the preparation method of the fluid loss control agent comprises the following steps:
[0030] 1) Add 220 parts of pure water into a four-necked flask, and add 7.5 parts of acrylamide, 21 parts of 2-acrylamide-2-methylpropanesulfonic acid, 25 parts of sodium styrene sulfonate and 3.5 parts of horse to anhydride, stirred until dissolved;
[0031] 2) Add 34.58 parts of sodium hydroxide aqueous solution to the above-mentioned four-necked flask to adjust the pH value to 7.0, then add 5 parts of 2% (mass percentage concentration) ammonium persulfate aqueous solution, and continue stirring;
[0032] 3) Heat the four-neck flask to 80°C, and react at this temperature for 1-3 hours at a constant temperature, and obtain a fluid loss control agent solution after the reaction;
[0033] 4) Vacuum-dry the fluid loss control agent solution at 35° C., and then crush and sieve it (through a 2...
Embodiment 2
[0035] This embodiment provides a high temperature resistant, salt tolerant fluid loss control agent, the preparation method of the fluid loss control agent comprises the following steps:
[0036] 1) Add 220 parts of pure water into a four-necked flask, and add 5 parts of acrylamide, 15 parts of 2-acrylamide-2-methylpropanesulfonic acid, 20 parts of sodium styrene sulfonate and 5 parts of horse to anhydride, stirred until dissolved;
[0037] 2) Add 34.9 parts of sodium hydroxide aqueous solution to the above-mentioned four-necked flask to adjust the pH value to 7.0, then add 4 parts of 2% ammonium persulfate aqueous solution, and stir;
[0038] 3) Heat the four-necked flask to 80°C, and react at this temperature for 1-3 hours at a constant temperature, and obtain a fluid loss control agent solution after the reaction is completed;
[0039] 4) Vacuum-dry the fluid loss control agent solution at 35° C., and then crush and sieve it (through a 200-mesh sieve) to obtain the finish...
Embodiment 3
[0041] This embodiment provides a high temperature resistant, salt tolerant fluid loss control agent, the preparation method of the fluid loss control agent comprises the following steps:
[0042] 1) Add 220 parts of pure water into a four-necked flask, and add 10 parts of acrylamide, 25 parts of 2-acrylamide-2-methylpropanesulfonic acid, 30 parts of sodium styrene sulfonate and 4 parts of horse to anhydride, stirred until dissolved;
[0043] 2) Add 40.48 parts of aqueous sodium hydroxide solution to the above-mentioned four-necked flask to adjust the pH value to 7.0, then add 6 parts of 2% aqueous ammonium persulfate solution, and stir;
[0044] 3) Heat the four-necked flask to 80°C, and react at this temperature for 1-3 hours at a constant temperature, and obtain a fluid loss control agent solution after the reaction is completed;
[0045] 4) Vacuum-dry the fluid loss control agent solution at 35° C., and then crush and sieve it (through a 200-mesh sieve) to obtain the fini...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More