申请人:Baker Hughes Incorporated
公开号:US20150377010A1
公开(公告)日:2015-12-31
Non-halogenated molecules including, but are not necessarily limited, to alkyl and aromatic amines having from 8 to 18 carbon atoms and salts of these amines, diols having the formula HO—(CH
2
)
n
—OH, diamines having the formula H
2
N—(CH
2
)
n
—NH
2
, dicarboxylic acids having the formula HO.CO—(CH
2
)
n
—CO.OH, diesters having the formula R′O.CO—(CH
2
)
n
—CO.OR″, where n is 4 to 18, and R′ and R″ are independently straight or branched alkyl or aromatic groups of 1-20 carbon atoms, and combinations thereof are used as tracers to measure oil and/or water fluid returns, e.g. from a hydraulic fracturing job. The non-halogenated molecules may be combined with substrates and introduced into a subterranean location, desorbed and recovered from the subterranean location with a fluid, reacted with a reagent to give a derivatized tracer. The presence of the derivatized tracer is then detected in the recovered fluid. Different non-halogenated tracers may be used for each hydraulic fracturing stage.