公开(公告)号：US11150373B2

公开(公告)日：2021-10-19

申请号：US16396324

申请日：2019-04-26

Applicant: Schlumberger Technology Corporation

Inventor： Gong Li Wang ,  John Rasmus ,  Dean Homan

IPC: G01V3/28

Abstract: The highly valuable properties of resistivity and dielectric constant of a geological formation may be determined using an induction measurement, even for a geological formation with bed boundary or dipping effects, using a one-dimensional (1D) formation model. Induction measurements may be obtained in a wellbore through the geological formation using one or more downhole tools. One or more processors may be used to perform an inversion to estimate resistivity and dielectric constant values of the geological formation. The inversion may be performed using the induction measurements and a one-dimensional model that includes a number of geological layers.

公开(公告)号：US20190235122A1

公开(公告)日：2019-08-01

申请号：US16265613

申请日：2019-02-01

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Dean Homan ,  John Rasmus ,  Gallyam Aidagulov ,  Harold Pfutzner

IPC: G01V3/38 ,  G01V3/20 ,  G01V3/28 ,  E21B43/26 ,  E21B49/00

CPC classification number: G01V3/38 ,  E21B43/26 ,  E21B49/00 ,  G01V3/20 ,  G01V3/28

Abstract: Methods may include emplacing a resistivity logging tool in a borehole; stimulating an interval of the formation in the borehole; obtaining at least one resistivity log of the interval of the formation, wherein the resistivity log comprises a survey of one or more depths into the formation; determining a radial invasion of the stimulating fluid into the interval of the formation; and inverting the radial invasion to obtain an input and entering the input into an effective medium model; solving the effective medium model and generating an effective wormhole radius profile and thickness for the interval of the formation.

公开(公告)号：US20190129056A1

公开(公告)日：2019-05-02

申请号：US16173245

申请日：2018-10-29

Applicant: Schlumberger Technology Corporation

Inventor： John Rasmus ,  Gong Li Wang ,  Dean M. Homan ,  Natalie Uschner-Arroyo

IPC: G01V3/28 ,  G01V3/38 ,  G01V3/30

Abstract: A formation characterization system can include a processor; memory accessibly by the processor; instructions stored in the memory and executable by the processor to instruct the system to: acquire induction measurements in a borehole in a formation using an induction tool; determine dielectric properties of the formation using the induction measurements; and generate a log that characterizes particles in the formation based on the dielectric properties.

公开(公告)号：US10036827B2

公开(公告)日：2018-07-31

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 ,  G01V3/28 ,  G01V13/00

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.

公开(公告)号：US09869792B2

公开(公告)日：2018-01-16

申请号：US14352566

申请日：2012-10-24

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Sushil Shetty ,  Dzevat Omeragic ,  Tarek M. Habashy ,  John Rasmus ,  Jeffrey Miles

IPC: G06K9/00 ,  G01V5/12 ,  G01V5/08

CPC classification number: G01V5/12 ,  G01V5/08

Abstract: Methods and apparatus for characterizing a subterranean formation traversed by a wellbore including collecting data from the formation using a tool wherein the tool collects data to form an azimuthal image, characterizing a section of the formation comprising data and images acquired in a high angle wellbore section or horizontal wellbore section using a parametric model, and performing an inversion using apparent densities and volumetric photoelectric factor images to build a formation model wherein the inversion is tailored for high angle wellbore sections and/or horizontal wellbore sections.

公开(公告)号：US11747508B2

公开(公告)日：2023-09-05

申请号：US16940492

申请日：2020-07-28

Applicant: Schlumberger Technology Corporation

Inventor： Siddharth Misra ,  Dean Homan ,  Yuteng Jin ,  John Rasmus

IPC: G01V3/38 ,  G01V3/30 ,  G01V3/12

CPC classification number: G01V3/38 ,  G01V3/12 ,  G01V3/30

Abstract: Aspects of the present disclosure relate to a method for determining a wettability of one or more types of solid particles within a geological formation. The method may include receiving a plurality of electromagnetic measurements within a frequency range from an electromagnetic well-logging tool. The method may also include determining a contact angle associated with at least one type of solid particles within the geological formation using the electromagnetic measurements.

公开(公告)号：US20220381939A1

公开(公告)日：2022-12-01

申请号：US17771514

申请日：2020-10-27

Applicant: Schlumberger Technology Corporation

Inventor： Dean Homan ,  Natalie Uschner-Arroyo ,  Chang-Yu Hou ,  Denise Freed ,  John Rasmus

IPC: G01V3/32 ,  E21B49/00 ,  G01V3/26 ,  G01V3/38

Abstract: A method for evaluating saturation of a kerogen bearing subterranean formation includes obtaining conductivity and permittivity values of the formation and providing an effective medium model relating the conductivity and the permittivity to a water filled porosity of the formation and an effective aspect ratio of graphitic kerogen particulate in the formation. The obtained conductivity and the permittivity values are input into the model which is in turn processed to compute the water filled porosity. The method may further optionally include evaluating the water filled porosity to estimate a hydrocarbon producibility of the formation.

公开(公告)号：US20190219558A1

公开(公告)日：2019-07-18

申请号：US16250307

申请日：2019-01-17

Applicant: Schlumberger Technology Corporation

Inventor： Vitor Villar De Andrade E Silva ,  John Rasmus

IPC: G01N33/28

CPC classification number: G01N33/2823

Abstract: A method can include receiving measurements of a fluid mixture where the measurements are acquired by at least one downhole tool; performing a multiphysics inversion of the measurements to generate nuclear parameter values for the fluid mixture; performing a multivariate interpolation using the generated nuclear parameter values that accounts for intermolecular interactions in the fluid mixture; and determining a composition of the fluid mixture based on the multivariate interpolation.

公开(公告)号：US20180372905A1

公开(公告)日：2018-12-27

申请号：US16120843

申请日：2018-09-04

Applicant: Schlumberger Technology Corporation

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

IPC: G01V3/12 ,  G01N33/24 ,  G01V3/28 ,  G01V3/30 ,  G01V3/38

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：US09765583B2

公开(公告)日：2017-09-19

申请号：US14819810

申请日：2015-08-06

Applicant: Schlumberger Technology Corporation

Inventor： John Rasmus ,  William Lesso ,  John James

IPC: E21B7/00 ,  E21B47/06 ,  E21B49/00 ,  E21B47/10 ,  G01V9/00 ,  G06F15/00 ,  E21B21/08

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.