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公开(公告)号：US10585083B2
公开(公告)日：2020-03-10
申请号：US15180246
申请日：2016-06-13
Applicant: Schlumberger Technology Corporation
Inventor： Vivek Anand
Abstract: This disclosure describes systems and methods to predict viscosity of heavy oil in a geological formation, even when the geological formation also contains water such as clay-bound water, using a downhole nuclear magnetic resonance (NMR) tool. The downhole NMR tools may obtain responses include distributions of a first relaxation time T1, a second relaxation time T2, or diffusion, or a combination of these. The responses of the NMR measurements that are due to water are separated from the responses of the NMR measurements that are due to heavy oil. The responses of the NMR measurements due to heavy oil are then related to likely values of viscosity of the heavy oil based on empirical or simulated measurements.
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公开(公告)号：US09696453B2
公开(公告)日：2017-07-04
申请号：US13791931
申请日：2013-03-09
Applicant: Schlumberger Technology Corporation
Inventor： Robert Freedman , Vivek Anand , Susan Herron , Michael M. Herron
CPC classification number: G01V5/08 , G01V3/12 , G01V3/30 , G01V3/34 , G01V5/04 , G01V5/045 , G01V5/10 , G01V5/12
Abstract: A method for predicting at least one property of a geological formation may include generating mapping function values relating a plurality of reference elemental compositions to corresponding reference properties thereof based upon at least one non-linear mapping function. The method may further include determining a sample elemental composition of at least one sample associated with the geological formation and performing, using a processor, an interpolation to map the sample elemental composition to at least one sample property based upon the mapping function values and the at least one non-linear function.
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公开(公告)号：US11650347B2
公开(公告)日：2023-05-16
申请号：US16615422
申请日：2018-05-23
Applicant: Schlumberger Technology Corporation
Inventor： Yi-Qiao Song , Ravinath Kausik Kadayam Viswanathan , Martin Hurlimann , Vivek Anand , Albina Mutina
CPC classification number: G01V3/32 , G01N24/081 , G01R33/5608 , G01R33/448
Abstract: Downhole properties of a geological formation may be determined using nuclear magnetic resonance (NMR) measurements obtained by a moving tool. To do so, an interpretation of the NMR data obtained by the moving data may take into account a moving model, characterization, or calibration of the downhole NMR tool. Additionally or alternatively, a partial interpretation mask may exclude interpretation of certain areas of data (e.g., T1-T2 data points or diffusion-T2 data points) that are expected to be less likely to describe downhole materials of interest.
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4.发明授权公开(公告)号：US11435304B2
公开(公告)日：2022-09-06
申请号：US16554786
申请日：2019-08-29
Applicant: Schlumberger Technology Corporation
Inventor： Vivek Anand , Ravinath Kausik Kadayam Viswanathan , Tianmin Jiang , Erik Rylander , Mansoor Ali , Richard E. Lewis
Abstract: Downhole fluid volumes of a geological formation may be estimated using nuclear magnetic resonance (NMR) measurements, even in organic shale reservoirs. Multi-dimensional NMR measurements, such as two-dimensional NMR measurements and/or, in some cases, one or more well-logging measurements relating to total organic carbon may be used to estimate downhole fluid volumes of hydrocarbons such as bitumen, light hydrocarbon, kerogen, and/or water. Having identified the fluid volumes in this manner or any other suitable manner from the NMR measurements, a reservoir producibility index (RPI) may be generated. The downhole fluid volumes and/or the RPI may be output on a well log to enable an operator to make operational and strategic decisions for well production.
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5.发明授权公开(公告)号：US10401313B2
公开(公告)日：2019-09-03
申请号：US15604029
申请日：2017-05-24
Applicant: Schlumberger Technology Corporation
Inventor： Vivek Anand , Ravinath Kausik Kadayam Viswanathan , Tianmin Jiang , Erik Rylander , Mansoor Ali , Richard E. Lewis
Abstract: Downhole fluid volumes of a geological formation may be estimated using nuclear magnetic resonance (NMR) measurements, even in organic shale reservoirs. Multi-dimensional NMR measurements, such as two-dimensional NMR measurements and/or, in some cases, one or more well-logging measurements relating to total organic carbon may be used to estimate downhole fluid volumes of hydrocarbons such as bitumen, light hydrocarbon, kerogen, and/or water. Having identified the fluid volumes in this manner or any other suitable manner from the NMR measurements, a reservoir producibility index (RPI) may be generated. The downhole fluid volumes and/or the RPI may be output on a well log to enable an operator to make operational and strategic decisions for well production.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20170343497A1
公开(公告)日：2017-11-30
申请号：US15604029
申请日：2017-05-24
Applicant: Schlumberger Technology Corporation
Inventor： Vivek Anand , Ravinath Kausik Kadayam Viswanathan , Tianmin Jiang , Erik Rylander , Mansoor Ali , Richard E. Lewis
CPC classification number: G01N24/082 , G01N24/081 , G01R33/448 , G01V3/32 , Y02A90/344
Abstract: Downhole fluid volumes of a geological formation may be estimated using nuclear magnetic resonance (NMR) measurements, even in organic shale reservoirs. Multi-dimensional NMR measurements, such as two-dimensional NMR measurements and/or, in some cases, one or more well-logging measurements relating to total organic carbon may be used to estimate downhole fluid volumes of hydrocarbons such as bitumen, light hydrocarbon, kerogen, and/or water. Having identified the fluid volumes in this manner or any other suitable manner from the NMR measurements, a reservoir producibility index (RPI) may be generated. The downhole fluid volumes and/or the RPI may be output on a well log to enable an operator to make operational and strategic decisions for well production.
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公开(公告)号：US20140214324A1
公开(公告)日：2014-07-31
申请号：US13791931
申请日：2013-03-09
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Robert Freedman , Vivek Anand , Susan Herron , Michael M. Herron
IPC: G01V5/10
CPC classification number: G01V5/08 , G01V3/12 , G01V3/30 , G01V3/34 , G01V5/04 , G01V5/045 , G01V5/10 , G01V5/12
Abstract: A method for predicting at least one property of a geological formation may include generating mapping function values relating a plurality of reference elemental compositions to corresponding reference properties thereof based upon at least one non-linear mapping function. The method may further include determining a sample elemental composition of at least one sample associated with the geological formation and performing, using a processor, an interpolation to map the sample elemental composition to at least one sample property based upon the mapping function values and the at least one non-linear function.
Abstract translation: 用于预测地质构造的至少一个属性的方法可以包括基于至少一个非线性映射函数来生成将多个参考元素组合物相关联到其对应参考属性的映射函数值。 该方法还可以包括确定与地质构造相关联的至少一个样本的样本元素组成，并使用处理器执行插值，以将样本元素组合映射到基于映射函数值和at 最少一个非线性函数。
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公开(公告)号：US20200174153A1
公开(公告)日：2020-06-04
申请号：US16615422
申请日：2018-05-23
Applicant: Schlumberger Technology Corporation
Inventor： Yi-Qiao Song , Ravinath Kausik Kadayam Viswanathan , Martin Hurlimann , Vivek Anand , Albina Mutina
Abstract: Downhole properties of a geological formation may be determined using nuclear magnetic resonance (NMR) measurements obtained by a moving tool. To do so, an interpretation of the NMR data obtained by the moving data may take into account a moving model, characterization, or calibration of the downhole NMR tool. Additionally or alternatively, a partial interpretation mask may exclude interpretation of certain areas of data (e.g., T1-T2 data points or diffusion-T2 data points) that are expected to be less likely to describe downhole materials of interest.
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公开(公告)号：US10024997B2
公开(公告)日：2018-07-17
申请号：US14173405
申请日：2014-02-05
Applicant: Schlumberger Technology Corporation
Inventor： Vivek Anand , Robert Freedman , Anatoly Dementyev , Payam Tabrizi , Daniel Catina
Abstract: The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data.
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公开(公告)号：US20160356912A1
公开(公告)日：2016-12-08
申请号：US14728703
申请日：2015-06-02
Applicant: Schlumberger Technology Corporation
Inventor： Mansoor Ali , Vivek Anand
CPC classification number: G01V3/32 , G01V3/38 , Y02A90/344
Abstract: A method of estimating fluid saturations includes obtaining amplitude values of nuclear magnetic resonance (NMR) data for a material, with each amplitude value being associated with a longitudinal magnetization recovery (T1 relaxation) time and a transverse magnetization decay (T2 relaxation) time. A mean is calculated as a function of the amplitude values and the T1 and T2 relaxation times for the amplitude values. Hydrocarbon saturation of pore space of the material is estimated as a function of the deviation of the mean from a threshold hydrocarbon saturation indicator and a threshold water saturation indicator, using the processor. Water saturation of the pore space of the material is estimated as a function of the deviation of the mean from the threshold hydrocarbon saturation indicator and the threshold water saturation indicator, using the processor.
Abstract translation: 估计流体饱和度的方法包括获得材料的核磁共振（NMR）数据的振幅值，其中每个振幅值与纵向磁化恢复（T1弛豫）时间和横向磁化衰减（T2弛豫）时间相关联。 根据振幅值和振幅值的T1和T2松弛时间的函数计算平均值。 使用处理器将材料的孔隙空间的烃饱和度估计为平均值与阈值碳氢化合物饱和指标和阈值水饱和度指标的偏差的函数。 使用处理器将材料的孔隙空间的水饱和度估计为平均值与阈值碳氢化合物饱和指标和阈值水饱和度指标的偏差的函数。
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