公开(公告)号：US20160186559A1

公开(公告)日：2016-06-30

申请号：US14975700

申请日：2015-12-18

Applicant: Schlumberger Technology Corporation

Inventor： Kang Wang ,  Ryan Sangjun Lee ,  Youxiang Zuo ,  Sai Venkatakrishnan ,  XiaoWei Sheng ,  Suchart Chokthanyawat ,  Lei Jiang ,  Lixiang Sun

IPC: E21B49/08

CPC classification number: E21B49/10 ,  E21B2049/085

Abstract: Disclosed are methods and apparatus obtaining in-situ, real-time data associated with a sample stream obtained by a downhole sampling apparatus disposed in a borehole that extends into a subterranean formation. The obtained data includes multiple fluid properties of the sample stream. The sample stream includes native formation fluid from the subterranean formation and filtrate contamination resulting from formation of the borehole in the subterranean formation. The obtained data is filtered to remove outliers. The filtered data is fit to each of a plurality of models each characterizing a corresponding one of the fluid properties as a function of a pumpout volume or time of the sample stream. based on the fitted data, a start of a developed flow regime of the native formation fluid within the subterranean formation surrounding the borehole is identified.

Abstract translation: 公开了获得与通过设置在延伸到地层中的钻孔中的井下采样装置获得的样品流相关联的原位实时数据的方法和装置。 获得的数据包括样品流的多个流体性质。 样品流包括来自地层的天然地层流体和由地层中的钻孔形成引起的滤液污染物。 所获得的数据被过滤以去除异常值。 滤波后的数据适合于多个模型中的每个模型，每个模型表征作为抽取流体的抽出体积或时间的函数的相应的一个流体特性。 基于拟合的数据，确定围绕钻孔的地下地层内的天然地层流体的开发流动状态的开始。

公开(公告)号：US10294785B2

公开(公告)日：2019-05-21

申请号：US14975700

申请日：2015-12-18

Applicant: Schlumberger Technology Corporation

Inventor： Kang Wang ,  Ryan Sangjun Lee ,  Youxiang Zuo ,  Sai Venkatakrishnan ,  XiaoWei Sheng ,  Suchart Chokthanyawat ,  Lei Jiang ,  Lixiang Sun

IPC: E21B49/08 ,  E21B49/10 ,  E21B49/00

Abstract: Disclosed are methods and apparatus obtaining in-situ, real-time data associated with a sample stream obtained by a downhole sampling apparatus disposed in a borehole that extends into a subterranean formation. The obtained data includes multiple fluid properties of the sample stream. The sample stream includes native formation fluid from the subterranean formation and filtrate contamination resulting from formation of the borehole in the subterranean formation. The obtained data is filtered to remove outliers. The filtered data is fit to each of a plurality of models each characterizing a corresponding one of the fluid properties as a function of a pumpout volume or time of the sample stream. Based on the fitted data, a start of a developed flow regime of the native formation fluid within the subterranean formation surrounding the borehole is identified.