公开(公告)号：US20150226059A1

公开(公告)日：2015-08-13

申请号：US14177744

申请日：2014-02-11

Applicant: Schlumberger Technology Corporation

Inventor： Youxiang Zuo ,  Adriaan Gisolf ,  Li Chen

IPC: E21B49/08 ,  G01N33/28

CPC classification number: G01N33/2841 ,  E21B41/005 ,  E21B49/10 ,  G01N33/2835

Abstract: Methods and apparatus for operating a downhole tool within a wellbore adjacent a subterranean formation to pump contaminated fluid from the formation into the downhole tool while measuring first and second fluid properties of the contaminated fluid. The contaminated fluid comprises native fluid from the formation and a contaminant. The downhole tool is in communication with surface equipment located at surface. The downhole tool and/or surface equipment is operated to estimate a formation volume factor of the contaminated fluid based on at least one of the first and second fluid properties of the contaminated fluid. A linear relationship is then estimated between the first fluid property and a function that relates the first fluid property to the second fluid property and the estimated formation volume factor of the contaminated fluid. A fluid property of the contaminant is then estimated based on the estimated linear relationship.

Abstract translation: 在邻近地下地层的井筒内操作井下工具的方法和装置，以将污染的流体从地层泵送到井下工具中，同时测量污染流体的第一和第二流体性质。 受污染的流体包括来自地层的天然流体和污染物。 井下工具与位于表面的地面设备连通。 操作井下工具和/或表面设备以基于受污染流体的第一和第二流体性质中的至少一个来估计污染流体的地层容积系数。 然后在第一流体属性和将第一流体属性与第二流体性质和估计的污染流体的形成体积因子相关联的函数之间估计线性关系。 然后基于估计的线性关系来估计污染物的流体性质。