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公开(公告)号：US11061158B2
公开(公告)日：2021-07-13
申请号：US16435684
申请日：2019-06-10
摘要： A method and device are described for making in situ measurements of the density and viscosity of downhole fluids at subterranean wells. An oscillator circuit is deployed in the well comprising an amplifier, a feedback loop, and an electromechanical resonator. The electromechanical resonator is a component in the feedback loop of the oscillator circuit, and has a resonance mode that determines the frequency of the oscillator circuit. The electromechanical resonator is also in contact with the fluid such that the density and viscosity of the fluid influence the resonant frequency and damping of the resonator. The frequency of the oscillator is measured by a microcontroller. In one embodiment, the oscillator circuit periodically stops driving the electromechanical resonator such that the oscillation decays and the rate of decay is also measured by the microcontroller. The density and viscosity of the fluid are determined from the frequency and rate of decay of the oscillation. This measurement technique provides a faster response time to fluid changes than is possible with conventional measurement methods, and the fast response time opens up new applications for downhole viscosity and density measurements, including determining PVT characteristics, phase diagrams, and flow rates.
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公开(公告)号：US20190196054A1
公开(公告)日：2019-06-27
申请号：US15852387
申请日：2017-12-22
发明人： Sebastian Csutak
摘要： The present disclosure describes methods and systems for determining source rock potential in a subterranean region of a hydrocarbon reservoir. One method includes: receiving, a terahertz (THz) scanning image from an in-situ THz scanner that is attached to a wellbore at a first subterranean location, wherein the wellbore extends into the subterranean region of the hydrocarbon reservoir; identifying, components of a source rock in the first subterranean location based on the THz scanning image; and determining, the source rock potential at the first subterranean location based on the identified components of the source rock.
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公开(公告)号：US10281413B2
公开(公告)日：2019-05-07
申请号：US16122649
申请日：2018-09-05
IPC分类号： G01V5/00 , G01N23/20025 , G01N33/24 , E21B49/00 , G01N23/2251 , G01N3/08 , G01N23/20091 , G01N23/02
摘要： Examples of nano-level evaluation of kerogen-rich reservoir rock are described. A micro-scale beam is formed from kerogen-rich reservoir rock. The beam has reservoir rock and kerogen, which has polymeric properties. A maximum dimension of the micro-scale beam is at most 1000 micrometers. A mechanical experiment that includes a tension test or a compression test is performed on the micro-scale beam. The mechanical experiment is imaged using a scanning electron microscope (SEM). A material parameter of the kerogen in the micro-scale beam is determined based on results of the mechanical experiment and images obtained responsive to the imaging. The material parameter includes a behavior of the kerogen in response to the mechanical experiment. The behavior of the kerogen can be used to determine, among other things, the energy required to break kerogen in a kerogen-rich shale to improve hydraulic fracturing efficiency.
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公开(公告)号：US10151714B2
公开(公告)日：2018-12-11
申请号：US15866634
申请日：2018-01-10
IPC分类号： G01V5/00 , G01N23/20025 , G01N23/02 , G01N23/20091 , G01N3/08 , E21B49/00 , G01N33/24 , G01N23/2251
摘要： Examples of nano-level evaluation of kerogen-rich reservoir rock are described. A micro-scale beam is formed from kerogen-rich reservoir rock. The beam has reservoir rock and kerogen, which has polymeric properties. A maximum dimension of the micro-scale beam is at most 1000 micrometers. A mechanical experiment that includes a tension test or a compression test is performed on the micro-scale beam. The mechanical experiment is imaged using a scanning electron microscope (SEM). A material parameter of the kerogen in the micro-scale beam is determined based on results of the mechanical experiment and images obtained responsive to the imaging. The material parameter includes a behavior of the kerogen in response to the mechanical experiment. The behavior of the kerogen can be used to determine, among other things, the energy required to break kerogen in a kerogen-rich shale to improve hydraulic fracturing efficiency.
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公开(公告)号：US20180156744A1
公开(公告)日：2018-06-07
申请号：US15866634
申请日：2018-01-10
IPC分类号： G01N23/20025 , G01V5/00 , G01N33/24 , G01N3/08 , E21B49/00 , G01N23/20091 , G01N23/02
CPC分类号： G01N23/20025 , E21B49/00 , G01N3/08 , G01N23/02 , G01N23/20091 , G01N23/2251 , G01N33/24 , G01N2223/102 , G01N2223/616 , G01V5/00
摘要： Examples of nano-level evaluation of kerogen-rich reservoir rock are described. A micro-scale beam is formed from kerogen-rich reservoir rock. The beam has reservoir rock and kerogen, which has polymeric properties. A maximum dimension of the micro-scale beam is at most 1000 micrometers. A mechanical experiment that includes a tension test or a compression test is performed on the micro-scale beam. The mechanical experiment is imaged using a scanning electron microscope (SEM). A material parameter of the kerogen in the micro-scale beam is determined based on results of the mechanical experiment and images obtained responsive to the imaging. The material parameter includes a behavior of the kerogen in response to the mechanical experiment. The behavior of the kerogen can be used to determine, among other things, the energy required to break kerogen in a kerogen-rich shale to improve hydraulic fracturing efficiency.
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6.发明申请Method And Device For Measuring Fluid Properties Using An Electromechanical Resonator 审中-公开使用机电谐振器测量流体特性的方法和装置公开(公告)号：US20170038491A1
公开(公告)日：2017-02-09
申请号：US15228241
申请日：2016-08-04
CPC分类号： G01V1/50 , E21B49/08 , E21B49/087 , E21B2049/085 , G01N9/002 , G01N11/16 , G01N2009/006
摘要： A method and device are described for making in situ measurements of the density and viscosity of downhole fluids at subterranean wells. An oscillator circuit is deployed in the well comprising an amplifier, a feedback loop, and an electromechanical resonator. The electromechanical resonator is a component in the feedback loop of the oscillator circuit, and has a resonance mode that determines the frequency of the oscillator circuit. The electromechanical resonator is also in contact with the fluid such that the density and viscosity of the fluid influence the resonant frequency and damping of the resonator. The frequency of the oscillator is measured by a microcontroller. In one embodiment, the oscillator circuit periodically stops driving the electromechanical resonator such that the oscillation decays and the rate of decay is also measured by the microcontroller. The density and viscosity of the fluid are determined from the frequency and rate of decay of the oscillation. This measurement technique provides a faster response time to fluid changes than is possible with conventional measurement methods, and the fast response time opens up new applications for downhole viscosity and density measurements, including determining PVT characteristics, phase diagrams, and flow rates.
摘要翻译： 描述了一种方法和装置，用于对地下井下井下流体的密度和粘度进行原位测量。 振荡器电路部署在井中，包括放大器，反馈回路和机电谐振器。 机电谐振器是振荡器电路的反馈环路中的一个部件，并且具有确定振荡器电路的频率的谐振模式。 机电谐振器也与流体接触，使得流体的密度和粘度影响谐振器的谐振频率和阻尼。 振荡器的频率由微控制器测量。 在一个实施例中，振荡器电路周期性地停止驱动机电谐振器，使得振荡衰减和衰减速率也由微控制器测量。 流体的密度和粘度由振荡衰减的频率和速率决定。 这种测量技术比传统的测量方法提供了比液体变化更快的响应时间，快速响应时间为井下粘度和密度测量（包括确定PVT特性，相图和流速）开辟了新的应用。
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公开(公告)号：US11352879B2
公开(公告)日：2022-06-07
申请号：US15921003
申请日：2018-03-14
发明人： Weichang Li , Sebastian Csutak , David Jacobi , Tiffany Dawn McAlpin , Max Deffenbaugh , Shannon Lee Eichmann
IPC分类号： E21B49/00 , G06N20/00 , G16C20/30 , G06N20/20 , G01N21/3563 , G01N33/24 , G06N5/04 , G16C20/70 , G01N21/35
摘要： Systems, apparatuses, and computer-implemented methods are provided for the sensing and prediction of properties of source rock. Disclosed here is a method of predicting the maturity of a source rock that includes obtaining a plurality of data of a sample source rock from a plurality of data acquisition devices placed in vicinity of the sample source rock and analyzing the received data using a predictive correlation to determine maturity of the sample source rock. The predictive correlation is generated by applying a machine learning model to correlate the plurality of data acquired from a plurality of representative source rocks with a plurality of properties of the plurality of representative source rocks.
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公开(公告)号：US20210095563A1
公开(公告)日：2021-04-01
申请号：US16588861
申请日：2019-09-30
IPC分类号： E21B49/08
摘要： A method of determining a risk of corrosion and scale formation of tubing in a wellbore includes receiving, from a plurality of first sensors positioned at a downhole location of a wellbore, first production stream information and receiving, from a plurality of second sensors positioned at an uphole location, second production stream information. The method also includes performing a material balance to determine a first value representing a difference between a first production steam flow rate at the downhole location and a second production stream flow rate at the uphole location. The method also includes determining a second value representing a critical metal ion concentration of the production stream and, based on a result of comparing the first value with a threshold and based on the second value, determining a third value representing a risk of corrosion and scale formation at the tubing disposed within the wellbore.
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公开(公告)号：US20190195816A1
公开(公告)日：2019-06-27
申请号：US15852324
申请日：2017-12-22
发明人： Sebastian Csutak
CPC分类号： G01N24/081 , E21B21/066 , E21B43/26 , E21B49/005 , E21B49/088 , G01N33/241 , G01V3/14 , G01V3/32
摘要： The present disclosure describes methods and systems for determining source rock potential in a subterranean region of a hydrocarbon reservoir. One method includes receiving, an electron spin resonance (ESR) image from an in-situ ESR scanner that is attached to a wellbore at a first subterranean location, wherein the wellbore extends into the subterranean region of the hydrocarbon reservoir; determining, a spin concentration level of a source rock in the first subterranean location based on the ESR image; and determining, the source rock potential at the first subterranean location based on the determined spin concentration level.
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公开(公告)号：US09869649B2
公开(公告)日：2018-01-16
申请号：US15250551
申请日：2016-08-29
CPC分类号： G01N23/20025 , E21B49/00 , G01N3/08 , G01N23/02 , G01N23/20091 , G01N23/2251 , G01N33/24 , G01N2223/102 , G01N2223/616 , G01V5/00
摘要： Examples of nano-level evaluation of kerogen-rich reservoir rock are described. A micro-scale beam is formed from kerogen-rich reservoir rock. The beam has reservoir rock and kerogen, which has polymeric properties. A maximum dimension of the micro-scale beam is at most 1000 micrometers. A mechanical experiment that includes a tension test or a compression test is performed on the micro-scale beam. The mechanical experiment is imaged using a scanning electron microscope (SEM). A material parameter of the kerogen in the micro-scale beam is determined based on results of the mechanical experiment and images obtained responsive to the imaging. The material parameter includes a behavior of the kerogen in response to the mechanical experiment. The behavior of the kerogen can be used to determine, among other things, the energy required to break kerogen in a kerogen-rich shale to improve hydraulic fracturing efficiency.
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