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公开(公告)号：US11150373B2
公开(公告)日：2021-10-19
申请号：US16396324
申请日：2019-04-26
发明人： Gong Li Wang , John Rasmus , Dean Homan
IPC分类号： G01V3/28
摘要： 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.
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公开(公告)号：US20190235122A1
公开(公告)日：2019-08-01
申请号：US16265613
申请日：2019-02-01
发明人： Dean Homan , John Rasmus , Gallyam Aidagulov , Harold Pfutzner
摘要： 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.
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公开(公告)号：US20190129056A1
公开(公告)日：2019-05-02
申请号：US16173245
申请日：2018-10-29
摘要： 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.
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公开(公告)号：US10036827B2
公开(公告)日：2018-07-31
申请号：US14944288
申请日：2015-11-18
发明人： Dean Homan , Siddharth Misra , John Rasmus , Gerald N. Minerbo
摘要： 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.
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5.发明授权公开(公告)号：US09869792B2
公开(公告)日：2018-01-16
申请号：US14352566
申请日：2012-10-24
发明人： Sushil Shetty , Dzevat Omeragic , Tarek M. Habashy , John Rasmus , Jeffrey Miles
摘要： 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.
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公开(公告)号：US20220381939A1
公开(公告)日：2022-12-01
申请号：US17771514
申请日：2020-10-27
发明人： Dean Homan , Natalie Uschner-Arroyo , Chang-Yu Hou , Denise Freed , John Rasmus
摘要： 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.
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公开(公告)号：US20190219558A1
公开(公告)日：2019-07-18
申请号：US16250307
申请日：2019-01-17
IPC分类号： G01N33/28
CPC分类号： G01N33/2823
摘要： 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.
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公开(公告)号：US20180372905A1
公开(公告)日：2018-12-27
申请号：US16120843
申请日：2018-09-04
发明人： Dean M. Homan , John Rasmus , Gerald Minerbo , Siddharth Misra , Aditya Gupta
摘要： 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.
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公开(公告)号：US09765583B2
公开(公告)日：2017-09-19
申请号：US14819810
申请日：2015-08-06
发明人： John Rasmus , William Lesso , John James
摘要： 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.
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10.发明申请AUTOMATIC METHOD FOR THREE-DIMENSIONAL STRUCTURAL INTERPRETATION OF BOREHOLE IMAGES ACQUIRED IN HIGH-ANGLE AND HORIZONTAL WELLS 审中-公开自动方法用于三角结构解释在高角度和水平井中获得的孔洞图像公开(公告)号：US20160370480A1
公开(公告)日：2016-12-22
申请号：US15122376
申请日：2015-02-27
发明人： Sushil Shetty , John Rasmus , Christopher Edward Morriss , Koji Ito , Shahzad Asif , Vittorio Picco
摘要： A method for automatic interpretation of bulls-eye and sinusoidal features observed in LWD images is disclosed. In some embodiments, the method includes an automatic workflow for extracting smooth contours from images that demarcate boundaries of structural features, followed by projection of the contours to three-dimensional (3D) point clouds in the well coordinate system for structural interpretation. The method may characterize both sinusoidal features and bulls-eye features, taking into account variations of formation dip/azimuth, or well inclination/azimuth, on the topology of a structural feature. The disclosed method may be sufficiently fast for use in real-time analysis and interpretation, or to provide constraints for physics-based data inversion processing.
摘要翻译： 公开了一种用于自动解释LWD图像中观察到的多眼和正弦特征的方法。 在一些实施例中，该方法包括用于从划分结构特征的边界的图像提取平滑轮廓的自动工作流程，随后将轮廓投影到用于结构解释的井坐标系中的三维（3D）点云。 考虑到结构特征的拓扑结构的地层倾斜/方位角或井倾角/方位角的变化，该方法可以表征正弦特征和公牛眼特征。 所公开的方法可以足够快以用于实时分析和解释，或为基于物理的数据反演处理提供约束。
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