Sun Refining and Marketing Company

Oryx Energy Company

Oryz Energy Company

John L Cayias

Howard P Angstadt

Donald F Rugen

Gunter J Lichtenberger

Kurt P McCaslin

Carl D McBride

G N Bass

Johnny M Reinschmidt

Susan M Holley

Greg Maddux

Apparatus and method for decreasing chemical requirements for chemicals injected into a stream a low concentrations, such as for dehydration of crude oil, are provided. An algorithm is used to provide a signal to decrease chemical injection rate of a variable rate pump if the water content of the treated oil has not exceeded a preset value in a preset time and to increase chemical injection rate if the water content of the treated oil is exceeded within a preset time. The algorithm allows the control system to learn from previous experience.

System for increasing efficiency of chemical treatment

A metal-containing oxidizing solution is injected through wellbores which reacts in a subterranean reservoir which has naturally-ocurring reduction capacity to form a slightly soluble compound of metal having a valence of +3. Thereafter, the metal crosslinks a water-soluble polymer which is injected into the metal-containing pore volume resulting in a decreased flow in the treated portion of the reservoir.

Redox gel process for more uniform fluid flow in formations

There is provided herein a process and composition for the enhanced recovery of oil from subterranean formations comprising injecting in combination with steam a composition comprising (a) an anionic surfactant and (b) a hydrotrope.

Oil recovery agent

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Richardson, TX, United States of America

John L Cayias