CAS： 1120-71-4| The Application of 1,3-propanesultone in Petroleum Exploration

Product Name：1,3-Propanesultone
CAS：1120-71-4
Molecular Formula：C3H6O3S
Article No.：100023-2
Structural Formula：

Product Introduction
1,3-propanesultone belongs to functional fine chemical new materials. It can react with many types of compounds under very mild conditions, accurately providing sulfonic acid groups, thereby endowing these compounds with hydrophilic, anti-static and other characteristics, making it an excellent universal sulfonating agent. Can be applied in fields such as lithium batteries, textile materials, biomedicine, etc.
Application of 1,3-Propanesultone
With the vertical development of oil exploration, the number of deep and ultra deep wells with temperatures exceeding 200 ℃ is also increasing, and the drilling conditions for drilling tools in the formation are becoming increasingly complex. During the drilling process, as the drilling depth increases, the temperature inside the wellbore significantly rises, and the problem of drilling fluid thickening becomes more and more serious. Viscosity reducers play a very important role in regulating the rheological properties of drilling fluid. Among various types of drilling fluid additives, polymer additives have developed rapidly and have high adjustability. People can synthesize high-temperature viscosity reducers that meet environmental requirements and adapt to complex wells by selecting monomers with characteristic functional groups. The CN118530704A patent provides a drilling fluid viscosity reducer suitable for deep wells and its preparation method. The specific preparation method is as follows:
(1) Add 1g of triethoxy-3- (2-imidazolin-1-yl) propylsilane and 0.48g of 1,3-propanesultone to 20g of anhydrous acetone, reflux under a nitrogen atmosphere for 16 hours, and after the reaction is complete, spin evaporate to obtain the amphoteric silane coupling agent;
(2) Disperse 1g of carbon nanotubes in 20g of anhydrous ethanol, adjust the pH to 9.2 with 28% ammonia water, add 0.3g of amphoteric silane coupling agent and 0.1g of phenyltriethoxysilane, heat to 50 ℃, stir for 12h, centrifuge, wash to obtain bifunctional carbon nanotubes;
(3) Under a nitrogen atmosphere, 10g of acrylamide, 2g of acrylic acid, 15g of sodium p-styrenesulfonate, and 3g of methacryloyl ethyl sulfobetaine were added to 150g of ethyl acetate, heated to 60℃, stirred for 20 minutes, then 1-2g of azobisisobutyronitrile were added, heated to 80 ℃, stirred for 8 hours, and then 1.2g of p-hydroxyphenyl methyl ether was added, stirred for 10 minutes, rotary evaporated, washed, and dried to obtain a amphoteric viscosity reducing polymer;
(4) Mix 20g of amphoteric viscosity reducing polymer and 0.5g of bifunctional carbon nanotubes evenly to obtain a drilling fluid viscosity reducing agent suitable for deep wells.
A drilling fluid viscosity reducer suitable for deep wells was prepared by combining dual functionalized carbon nanotubes with amphoteric viscosity reducing polymers. The dual functionalized carbon nanotubes were modified with highly active amphoteric silane coupling agents containing imidazole cations and hydrophobic phenylsilane coupling agents, which effectively combined with amphoteric viscosity reducing polymers to improve viscosity reduction performance, temperature resistance, and salt resistance.

References
CN118530704A A drilling fluid viscosity reducer suitable for deep wells and its preparation method..