Method of removing hydrogen sulfide from a subterranean geological formation with a zeolitic imidazolate framework in waste cooking oil-based drilling fluids
AssigneeKing Fahd University of Petroleum and Minerals
InventorsSagheer A. Onaizi, Mustapha Iddrisu
Life of this patent
Estimating the term…
Abstract
A method of removing hydrogen sulfide from a subterranean geological formation includes mixing a zinc-imidazolate material, ZIF-8, in an amount of 0.1 to 2.5 percent by weight with an organic liquid containing one or more unsaturated oils to form a drilling fluid suspension with a pH of 10 or more. The method includes injecting the drilling fluid suspension in the subterranean geological formation, circulating the drilling fluid suspension in the subterranean geological formation to form an oil-based mud, and scavenging hydrogen sulfide from the subterranean geological formation.
Claims18
A method of removing hydrogen sulfide from a subterranean geological formation, comprising:
- mixing a zinc-imidazolate material with an organic liquid to form a drilling fluid suspension,
- wherein the zinc-imidazolate material is present in an amount of 0.1 to 2.5 percent by weight of the drilling fluid suspension,
- wherein the zinc-imidazolate material is a ZIF-8,
- wherein the organic liquid comprises one or more unsaturated oils,
- wherein the drilling fluid suspension has a pH of 10 or more,
- injecting the drilling fluid suspension in the subterranean geological formation,
- circulating the drilling fluid suspension in the subterranean geological formation and forming an oil-based mud;
- and
- scavenging hydrogen sulfide from the subterranean geological formation,
- wherein the hydrogen sulfide is quenched in the zinc-imidazolate material during the scavenging;
- and
- wherein the hydrogen sulfide is scavenged through uncoordinated open metal zinc (II) and basic nitrogen sites in the zinc-imidazolate material.
A method of removing hydrogen sulfide from a subterranean geological formation, comprising:
- mixing a zinc-imidazolate material with an organic liquid to form a drilling fluid suspension,
- wherein the zinc-imidazolate material is present in an amount of 0.1 to 2.5 percent by weight of the drilling fluid suspension,
- wherein the zinc-imidazolate material is a ZIF-8,
- wherein the organic liquid comprises one or more unsaturated oils,
- wherein the drilling fluid suspension has a pH of 10 or more,
- injecting the drilling fluid suspension in the subterranean geological formation,
- circulating the drilling fluid suspension in the subterranean geological formation and forming an oil-based mud;
- and
- flowing hydrogen sulfide gas into the drilling fluid suspension;
- and
- scavenging hydrogen sulfide from the subterranean geological formation,
- wherein the hydrogen sulfide is quenched in the zinc-imidazolate material during the scavenging.
Dependencies are inferred from the claim text.