Bp Exploration Operating Company Limited

Baker Hughes Oilfield Operations LLC

University System of Maryland

Shanshan Huang

Angela Anh Doan

Daniel J Daulton

Paulo Jorge Da Cunha Gomes

Antonio Bottiglieri

Cresencio Perez

David James Hoolas

Emmanuel Therond

Srinivasa R Raghavan

David Chappell

Joseph Wee

Faraz A Burni

The problem of lost circulation is pertinent to the oil industry. To prevent fluid loss, a lost circulation material (LCM), or more generally, a plugging material, can be used to effectively plug the fractures in the rock formation. If the fractures are in the production zone, it is also ideal to unplug them when the drilling operation is complete. Therefore, a material engineered to degrade after a desired period would be useful. In examples, a plugging material has been developed by gelling an oil-based fluid using a low molecular weight gelator, dibenzylidene sorbitol (DBS). DBS gels are robust and show plugging behavior. DBS is shown to chemically degrade in presence of an acid. Hence, a self-degrading gel can be synthesized by incorporating an acid into the system. Further, by varying the type and concentration of the acid, the degradation time of the gel can be controlled.

Self-degrading organogels

A method of cementing a wellbore includes injecting into the wellbore a non-aqueous fluid; injecting into the wellbore a cement slurry and a non-ionic surfactant composition after injecting the non-aqueous fluid; and allowing the cement slurry to set, wherein the non-ionic surfactant composition comprises an alkyl end-capped ethoxylated fatty alcohol, a chain extended non-ionic surfactant, or a combination comprising at least one of the foregoing.

Methods of cementing a wellbore without using a spacer fluid with a chain extended non-ionic surfactant

Methods of cementing a wellbore without using a spacer fluid with an alkyl end-capped ethoxylated fatty alcohol

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Middlesex, United Kingdom

Shanshan Huang