Bp Exploration Operating Company Limited

Ian Gray

Mark Shelton Aston

Dana Aytkhozhina

Method of consolidating sand in a subterranean formation by contacting the sand in a first location in the presence of water with a slurry in a liquid medium of cement of average particle size less than 10 microns to produce a mixture including sand, water and cement, the slurry being injected into the formation to the location. A separation step is carried out in which a liquid hydrocarbon fluid is passed into the location to displace from the location at least some of the cement from the mixture. The volume ratio of liquid hydrocarbon fluid to the volume of the slurry injected to the formation is at least 5:1. The mixture is allowed to set to give permeable consolidated sand.

Formation treatment

Method of treating a subterranean hydrocarbon-bearing formation comprising unconsolidated or poorly consolidated particulates, by contacting the formation with a solution or a dispersion of an organosilane which is a silylated polymer of formula (I):(RO)RSi-A-B-A-Si(OR)R&#x2003;&#x2003;(I)

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Rugby, United Kingdom

Ian Gray