申请人:M-I LLC
公开号:US20010001991A1
公开(公告)日:2001-05-31
A method of electrically logging subterranean wells using a conductive fluid includes a miscible combination of an oleaginous fluid, a polar organic solvent, an electrolytic salt, and a carbon dioxide buffer. The electrolytic salt or brine of the salt is present in a concentration sufficient to permit the electrical logging of the subterranean well. The polar organic solvent may be an oil soluble glycol or glycol ether such as ethylene glycol, diethylene glycol, propylene glycol, polypropylene glycol, and the like. The electrolytic salt or brine preferably includes a quaternary amine salt having the formula:
1
wherein R is an alkyl having 8 to 18 carbon atoms, R′ is 2 to 6 carbon atoms alkyl group, B is hydrogen, oxyalkyl having 1 to 4 carbon atoms or alkyl having 1 to 4 carbon atoms, A is hydrogen or alkyl with 1 to 4 carbon atoms, x+y=1 to 15, z is 0 to 3, and M
−
is a counter anion; or combinations thereof. The carbon dioxide buffer is preferably a trialkylanol amine.
一种使用导电流体对地下井进行电测井的方法,包括含油流体、极性有机溶剂、电解盐和二氧化碳缓冲液的混溶组合。电解盐或盐水的浓度足以允许对地下井进行电测井。极性有机溶剂可以是油溶性乙二醇或乙二醇醚,如乙二醇、二甘醇、丙二醇、聚丙二醇等。电解盐或盐水最好包括具有以下式子的季胺盐:
1
其中 R 是具有 8 至 18 个碳原子的烷基,R′是具有 2 至 6 个碳原子的烷基,B 是氢、具有 1 至 4 个碳原子的氧烷基或具有 1 至 4 个碳原子的烷基,A 是氢或具有 1 至 4 个碳原子的烷基,x+y=1 至 15,z 是 0 至 3,以及 M
-
是反阴离子;或它们的组合。二氧化碳缓冲剂最好是三烷基醇胺。