C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/32 (2006.01) E21B 49/00 (2006.01) E21B 21/00 (2006.01)
Patent
CA 2300888
An alkaline-reserve-free, oil-based drilling fluid is disclosed as comprising an oleaginous liquid, and an amine surfactant having the structure R-NH2, wherein R represents a C12-C12 alkyl group or alkenyl group. Such fluid is particularly useful in the drilling of subterranean wells in which CO2, H2S or other acidic gases which adversely effect the rheologies and other properties of the drilling fluid are encountered. The alkaline-reserve-free oil-based drilling fluid permits the logging of acidic gases which otherwise could not be logged in the presence of lime or other alkaline.
L'invention concerne un fluide de forage a base d'huile exempt de réserve alkaline comprenant un liquide oléagineux et un tensio-actif aminé ayant la structure R-NH2, dans laquelle R représente un groupe alkyle C12-C22 ou un groupe alcényle. Ce fluide est particulièrement utile dans le forage de puits souterrains dans lesquels on rencontre du CO2, du H2S ou d'autres gaz acides affectant négativement les rhéologies ainsi que d'autres propriétés du fluide de forage. Le fluide de forage à base d'huile exempt de réserve alkaline permet la diagraphie de gaz acides dont on ne pourrait autrement obtenir une diagraphie en présence de chaux ou d'autres matières alcalines.
Oehler Harris A.
Patel Arvind D.
Patel Jayanti S.
Finlayson & Singlehurst
M-I L.l.c.
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