公开(公告)号：US20210207020A1

公开(公告)日：2021-07-08

申请号：US16733495

申请日：2020-01-03

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Salaheldin ELKATATNY ,  Mohamed MAHMOUD ,  Abdullah SULTAN

IPC: C09K8/528 ,  C09K8/035 ,  C09K8/524 ,  C09K8/03

Abstract: A method of removing calcium-containing water-based filter cake from a wellbore involving contacting the calcium-containing filter cake with a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, and a surfactant. The method is performed at a pressure of 200 to 400 psi and a temperature of 50 to 125° C. The method removes calcium-containing filter cake made of water, calcium carbonate, a polymer or starch and a clay. The method meets industry standard steel corrosion rates of less than 0.049 lb/ft2 per day. Also disclosed is a biodegradable acid solution of water, hydrochloric acid, formic acid, citric acid, and a surfactant that meets OECD 301B thresholds for ready biodegradability.

公开(公告)号：US20230243247A1

公开(公告)日：2023-08-03

申请号：US17589140

申请日：2022-01-31

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Saad AL AFNAN ,  Murtada AL JAWAD ,  Guenther GLATZ ,  Abdullah SULTAN

IPC: E21B43/24

CPC classification number: E21B43/2401

Abstract: A method of enhanced gaseous hydrocarbons recovery is provided. The method includes placing at least two individual, independently-controllable heating elements aligned opposite one another and in the same location on a production tubing in a wellbore at a gaseous hydrocarbons -producing location of a geological formation to form a permanently-installed array of heating elements. The method also includes heating a portion of the geological formation containing a gaseous hydrocarbons deposit comprising kerogen with a gaseous hydrocarbons formation heating device comprising the permanently-installed array of heating elements, at a temperature sufficient to liberate gaseous hydrocarbons from the kerogen present in the gaseous hydrocarbons deposit and recovering the gaseous hydrocarbons by transporting the gaseous hydrocarbons via the production tubing to the surface. The gaseous hydrocarbons formation heating device comprises a controller configured to control the permanently-installed array of heating elements.

公开(公告)号：US20240280008A1

公开(公告)日：2024-08-22

申请号：US18631121

申请日：2024-04-10

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Saad AL AFNAN ,  Murtada AL JAWAD ,  Guenther GLATZ ,  Abdullah SULTAN

IPC: E21B43/24

CPC classification number: E21B43/2401

Abstract: A method of enhanced gaseous hydrocarbons recovery is provided. The method includes placing at least two individual, independently-controllable heating elements aligned opposite one another and in the same location on a production tubing in a wellbore at a gaseous hydrocarbons-producing location of a geological formation to form a permanently-installed array of heating elements. The method also includes heating a portion of the geological formation containing a gaseous hydrocarbons deposit comprising kerogen with a gaseous hydrocarbons formation heating device comprising the permanently-installed array of heating elements, at a temperature sufficient to liberate gaseous hydrocarbons from the kerogen present in the gaseous hydrocarbons deposit and recovering the gaseous hydrocarbons by transporting the gaseous hydrocarbons via the production tubing to the surface. The gaseous hydrocarbons formation heating device comprises a controller configured to control the permanently-installed array of heating elements.

公开(公告)号：US20210207019A1

公开(公告)日：2021-07-08

申请号：US16733476

申请日：2020-01-03

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Salaheldin ELKATATNY ,  Mohamed MAHMOUD ,  Hany GAMAL ,  Abdullah SULTAN

IPC: C09K8/528 ,  E21B37/04 ,  E21B37/06 ,  C09K8/536

Abstract: A method of removing iron-containing scale from a wellbore, pipe, or metal-containing surface involving contacting the iron-containing scale with a biodegradable descaler solution of water, hydrochloric acid, formic acid, citric acid, a corrosion inhibitor, a corrosion inhibitor intensifier, and a surfactant. The method is performed at a pressure of 14 to 400 psi and a temperature of 100 to 150° C. The method removes iron-containing scale made of iron sulfide, iron carbonate, iron oxyhydroxide, and calcium carbonate. The method meets industry standard steel corrosion rates of less than 0.049 lb/ft2 per day. Also disclosed is a biodegradable descaler solution of water, hydrochloric acid, formic acid, citric acid, a corrosion inhibitor, a corrosion inhibitor intensifier, and a surfactant that meets OECD 301B thresholds for ready biodegradability.