Schlumberger Technology Corporation

Yamina Boubeguira

Elena Pershikova

Olivier Porcherie

Hafida Achtal

Slaheddine Kefi

Benedicte Ayache-Zusatz

Gaetan Rimmele

Nigel Evans

Organic compounds containing at least one nitrogen atom are particularly suitable as retarders for geopolymeric systems employed as well cements. Preferred compounds include aminated polymers, amine phosphonates, quaternary ammonium compounds and tertiary amines. The geopolymeric compositions are suitable for primary cementing and remedial cementing operations. The preferred temperature range within which the retarders operate is between about 20&#xb0; C. and 120&#xb0; C.

Compositions and methods for well cementing

The invention concerns the use of a carbohydrate-based compound as a mixing aid and dispersing agent in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator, and method for placing such a suspension in a borehole. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.

Pumpable geopolymers comprising a mixing aid and dispersing agent

A carbohydrate-based compound is used as a setting accelerator in a pumpable geopolymeric suspension for oil and/or gas industry applications. The suspension further comprises an aluminosilicate source, a carrier fluid, and an activator. The suspensions may be placed in a subterranean well and used for well primary cementing operations and/or remedial applications.

Pumpable geopolymers comprising a setting accelerator

The invention concerns the use of a fluid loss control additive in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator, and method of providing such a suspension in a borehole. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.

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Les Moulineaux, France

Yamina Boubeguira