King Fahd University of Petroleum and Minerals

Saudi Arabian Oil Company

Arshad Raza

Mohamed Mahmoud

Muhammad Shahzad Kamal

Murtadha J AlTammar

Mobeen Murtaza

Esmail Mohamed Ali Mokheimer

Shirish Patil

Alade Olalekan Saheed

Guenther Glatz

Mohamed Ahmed Nasr Aldeen Mahmoud

Fahad Khan

A method of thermally shocking a subsurface formation may comprise introducing an endothermic fluid composition into a wellbore fluidly connected to the subsurface formation, the endothermic fluid composition comprising an aqueous solution, ammonium chloride, and sodium hydroxide; reacting the ammonium chloride and sodium hydroxide, thereby decreasing a temperature of the endothermic fluid and producing ammonia; and exposing the reacted endothermic fluid composition to the subsurface formation, thereby thermally shocking at least a portion of the subsurface formation and inducing one or more fractures in the same.

Methods and compositions for thermally shocking subsurface formations

A thermochemical engine that includes a reaction chamber having a nitrite source inlet, an ammonium source inlet, and a gas outlet, and a gas-driven energy transducer coupled to the reaction chamber such that a gas produced in the reaction chamber moves the gas-driven energy transducer in a process of exiting the reaction chamber via the gas outlet. The thermochemical engine is configured to produce the gas under pressure by reacting in the reaction chamber a nitrite source comprising a nitrite ion and an ammonium source comprising an ammonium ion in the presence of water at a reaction temperature of 50 to 150° C.

Thermochemical engine

Growing community of inventors

Dhahran, Saudi Arabia

Arshad Raza