King Fahd University of Petroleum and Minerals

Salah El-Din Elkatatny

Mohamed Ahmed Nasr El-Din Mahmoud

Marwan Nagm Eldeen Mohammad

Mohamed Mahmoud

Reyad Awwad Shawabkeh

The present invention relates to a composition for dissolving an oil-based filter cake in a wellbore, and a single-step method of use. The composition comprises a chelating agent, a converting agent, a polymer removal agent, a mutual solvent, and a surfactant. The present invention also relates to a multi-step method of dissolving an oil-based filter cake using similar components. Both single-step and multistep methods may be used to dissolve oil-based filter cakes comprising barite as a weighting material.

Method of removing oil-based barite filter cake

Composition and method for removing oil-based filter cake

A drilling fluid composition comprising an aqueous base fluid, a viscosifier, and a HS scavenger comprising copper nitrate, wherein the drilling fluid composition has a HS sorption capacity from about 4.0 to about 6.0 gram per one milliliter of the drilling fluid composition; and a method of drilling a subterranean geological formation using thereof are provided. Various embodiments of the drilling fluid composition and the method are also provided.

Method for drilling a wellbore with a weighted hydrogen sulfide scavenger fluid

Method for drilling a hydrogen sulfide-containing formation

A fracturing fluid composition that includes a chelating agent, e.g. GLDA, and a polymeric additive comprising a copolymer of acrylamido-tert-butyl sulfonate and hydrolyzed polyacrylamide diluted in an aqueous base fluid, e.g. seawater, and a method of fracking a geological formation using the fracturing fluid composition. Various embodiments of the fracturing fluid composition and the method of fracking are also provided.

Organic acid fracturing fluid composition

Fracturing fluid composition containing an acrylamido-tert-butylsulfonate polymer

Method of drilling a substerranean geological formation with a drilling fluid composition comprising copper nitrate

Saltwater-based fracturing fluid

Glutamic diacetic acid-containing aqueous fluid composition

Fracturing fluid composition and a method of fracturing a subterranean formation using the same

A method of evaluating the effectiveness of matrix acidizing treatment in a subterranean formation surrounding a wellbore that involves injecting a plurality of cationic salts into multiple sections of the subterranean formation before acidizing treatment, followed by collecting the cationic salts at the surface of the wellbore after producing the wellbore. A permeability recovery factor is calculated from a concentration ratio of the injected salt to the collected salt. The permeability recovery factor shows the effectiveness of the acidizing treatment. The permeability recovery factor also indicates the contribution of each individual section of the formation to the total production flow.

Method for evaluating the effectiveness of matrix acidizing in a subterranean formation

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Dhahran, Saudi Arabia

Salah El-Din Elkatatny