公开(公告)号：US10330618B2

公开(公告)日：2019-06-25

申请号：US15569094

申请日：2016-04-29

Applicant: Schlumberger Technology Corporation

Inventor： Siddharth Misra ,  John Rasmus ,  Dean Homan

IPC: G01N27/04 ,  G01V3/26 ,  G01V3/38

Abstract: A method to estimate water saturation in electromagnetic measurements includes making an electromagnetic measurement and performing at least one of (a) creating an analytical forward model of the EM measurement, (b) creating a numerical finite difference forward model of the EM measurement, and (c) performing an inversion. The method also includes removing at least one petrophysically-adverse alteration of EM measurements in the frequency range from 1 Hz to 100 MHz. A petrophysically-adverse alteration is due to the presence of at least one of the following: pyrite, graphitic-precursors, magnetite, and other conductive minerals.

公开(公告)号：US10067257B2

公开(公告)日：2018-09-04

申请号：US14827632

申请日：2015-08-17

Applicant: Schlumberger Technology Corporation

Inventor： Dean Homan ,  John Rasmus ,  Gerald Minerbo ,  Siddharth Misra ,  Aditya Gupta

IPC: G01V3/00 ,  G01V3/02 ,  G01V3/04 ,  G01V3/10 ,  G01V3/12 ,  G01N33/24 ,  G01V3/30 ,  G01V3/38 ,  G01V3/28

Abstract: An electromagnetic measurement tool for making multi-frequency, full tensor, complex, electromagnetic measurements includes a triaxial transmitter and a triaxial receiver deployed on a tubular member. An electronic module is configured to obtain electromagnetic measurements at four or more distinct frequencies. The measurement tool may be used for various applications including obtaining a resistivity of sand layers in an alternating shale-sand formation; computing a dielectric permittivity, a conductivity anisotropy, and/or a permittivity anisotropy of a formation sample; and/or identifying formation mineralization including discriminating between pyrite and graphite inclusions and/or computing weight percent graphite and/or pyrite in the formation sample.

公开(公告)号：US20180087376A1

公开(公告)日：2018-03-29

申请号：US15274277

申请日：2016-09-23

Applicant: Schlumberger Technology Corporation

Inventor： John Rasmus ,  Alex Ahrenst ,  Ana Peternell ,  Jeffrey Miles ,  Martinus Johannes Bernardus Bogaerts

IPC: E21B49/00 ,  G01V5/10 ,  E21B33/14 ,  E21B43/267 ,  E21B47/00

CPC classification number: E21B49/00 ,  E21B33/14 ,  E21B43/267 ,  E21B47/0005 ,  G01V5/101

Abstract: A method of performing a wellbore operation includes: circulating a doped wellbore fluid comprising a non-radioactive doped particulate material in a wellbore; and logging the wellbore with a logging-while-drilling tool to determine at least one characteristic of the doped wellbore fluid. A method of performing a wellbore operation includes: circulating a doped wellbore fluid comprising a non-radioactive doped particulate material in a wellbore; logging the wellbore with a logging tool; and determining a location of at least one fracture by elemental spectroscopy measurements.

公开(公告)号：US09593571B2

公开(公告)日：2017-03-14

申请号：US14284668

申请日：2014-05-22

Applicant: Schlumberger Technology Corporation

Inventor： John Rasmus ,  George Bordakov

IPC: E21B47/04

CPC classification number: E21B47/04

Abstract: A method includes accepting as input to a processor measurements of a characteristic of a subsurface formation made at a plurality of spaced apart positions along a pipe string moved along a wellbore. Measurements are made of pipe string depth in the wellbore from the Earth's surface. The measurements of pipe string depth include measurements of apparent depth of each of the spaced apart locations. The subsurface formation is identified from the measurements of the characteristic. A true depth of the subsurface formation is made using the measurements of pipe string depth and apparent depth of the formation from each of the spaced apart positions. A record of measurements of the characteristic with respect to depth corrected for changes in length of the pipe string caused by axial forces along the pipe string is generated.

Abstract translation: 一种方法包括接受处理器沿沿着井眼移动的管柱的多个间隔位置处形成的地下地层的特性的输入的输入。 测量来自地球表面的井眼中的管柱深度。 管柱深度的测量包括每个间隔开的位置的表观深度的测量。 从特征的测量中识别地下地层。 使用从每个间隔开的位置的管柱深度和地层的表观深度的测量来进行地下地层的真实深度。 产生相对于沿着管柱的轴向力引起的管柱长度变化校正的特性的测量记录。

公开(公告)号：US20160139231A1

公开(公告)日：2016-05-19

申请号：US14944288

申请日：2015-11-18

Applicant: Schlumberger Technology Corporation

Inventor： Dean Homan ,  Siddharth Misra ,  John Rasmus ,  Gerald N. Minerbo

IPC: G01R35/00 ,  G01N27/02

CPC classification number: G01V3/28 ,  G01V13/00

Abstract: A method for calibrating an electromagnetic core analysis tool is disclosed. The method includes disposing a tilted test loop inside of or outside of a tool having more than one antenna. A uniform test pack, a layered test pack, and an effective media test pack are each disposed in the tool. A signal is induced in a receiver antenna in the tool when a second antenna is energized with a known current of a known frequency. The induced signal is measured and a calibration gain and offset is determined. A corrected signal is produced and compared with the determined signal based on a forward model.

Abstract translation: 公开了一种用于校准电磁核心分析工具的方法。 该方法包括在具有多于一个天线的工具的内部或外部设置倾斜测试回路。 均匀的测试包，分层的测试包和有效的介质测试包各自被放置在工具中。 当第二天线以已知频率的已知电流通电时，在工具中的接收机天线中感应信号。 测量感应信号，并确定校准增益和偏移。 基于正向模型产生校正信号并与确定的信号进行比较。

公开(公告)号：US20160053608A1

公开(公告)日：2016-02-25

申请号：US14929621

申请日：2015-11-02

Applicant: Schlumberger Technology Corporation

Inventor： Najmud Dowla ,  John Rasmus ,  Abhijeet Nayan ,  Taesoo Kim ,  Richard J. Radtke ,  Michael Evans

IPC: E21B47/09 ,  E21B47/12

CPC classification number: E21B47/09 ,  E21B17/08 ,  E21B47/12

Abstract: Systems and methods identify and/or detect one or more features of a well casing by utilizing one or more downhole measurements obtainable by a downhole component. The one or more features of the well casing are identifiable and/or detectable from the one or more measurements associated with one or more properties of the one or more features of the well casing. The one or more measurements for indentifying and/or detecting a presence and/or a location of the one or more features of the well casing include sonic measurements, nuclear measurements, gamma ray measurements, photoelectric measurements, resistivity measurements and/or combinations thereof

Abstract translation: 系统和方法通过利用由井下部件可获得的一个或多个井下测量来识别和/或检测井套管的一个或多个特征。 井套管的一个或多个特征可以从与井套管的一个或多个特征的一个或多个特性相关联的一个或多个测量值中被识别和/或检测。 用于识别和/或检测井套管的一个或多个特征的存在和/或位置的一个或多个测量包括声波测量，核测量，伽马射线测量，光电测量，电阻率测量和/或其组合

公开(公告)号：US20160002991A1

公开(公告)日：2016-01-07

申请号：US14819810

申请日：2015-08-06

Applicant: Schlumberger Technology Corporation

Inventor： John Rasmus ,  William Lesso ,  John James

IPC: E21B21/08 ,  E21B7/00 ,  E21B47/06

CPC classification number: E21B21/08 ,  E21B7/00 ,  E21B47/06 ,  E21B47/10 ,  E21B49/005 ,  G01V9/00 ,  G06F15/00

Abstract: A method for estimating equivalent top of fluid level or a theoretical surface annular back pressure in a subterranean wellbore includes acquiring first and second axially spaced pressure measurements in the wellbore. The pressure measurements may then be processed to compute the equivalent top of fluid level and/or theoretical surface annular back pressure of drilling fluid between the measurement locations. A tool string including a large number of axially spaced pressure sensors (e.g., four or more or even six or more) electronically coupled with a surface processor via wired drill pipe may be used to obtain a plurality of values corresponding to various wellbore intervals. The equivalent top of fluid level and/or theoretical surface annular back pressures may be used in automated managed pressure drilling operations.

Abstract translation: 一种用于估计地下井筒中的液面或理论表面环形背压的等效顶部的方法包括在井眼中获取第一和第二轴向间隔的压力测量。 然后可以处理压力测量以计算测量位置之间的钻井液的液面的等效顶部和/或理论表面环形背压。 可以使用包括大量轴向间隔开的压力传感器（例如，四个或更多或甚至六个或更多）的工具串，其通过有线钻杆与表面处理器电连接，以获得对应于各种井筒间隔的多个值。 流体水平和/或理论表面环形背压的等效顶部可用于自动化管理压力钻井操作。