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1. 发明申请

US20190112906A1 LOW DIELECTRIC ZONE FOR HYDROCARBON RECOVERY BY DIELECTRIC HEATING 审中-公开
公开(公告)号：US20190112906A1
公开(公告)日：2019-04-18
申请号：US15783640
申请日：2017-10-13
申请人： Chevron U.S.A. Inc.
发明人： Gunther H. Dieckmann , Michal Mieczyslaw Okoniewski , Cesar Ovalles , Pedro Vaca , James Dunlavey , Donald Kuehne
IPC分类号： E21B43/24 , E21B33/14
摘要： Embodiments include drilling a wellbore in a hydrocarbon-bearing formation, and the wellbore includes a radio frequency antenna destination portion that is configured to receive a radio frequency antenna; forming a low dielectric zone in the hydrocarbon-bearing formation proximate to the radio frequency antenna destination portion with a cavity based process or a squeezing based process; positioning the radio frequency antenna into the radio frequency antenna destination portion such that the radio frequency antenna is proximate to the low dielectric zone; dielectric heating the hydrocarbon-bearing formation with the radio frequency antenna such that the low dielectric zone increases dissipation of energy from the radio frequency antenna into the hydrocarbon-bearing formation; and extracting hydrocarbons from the heated hydrocarbon-bearing formation. The material has a dielectric constant of less than or equal to 20, a loss tangent of less than or equal to 0.4, and a porosity of less than or equal to 5%.

2. 发明授权

US09670760B2 Process for in situ upgrading of a heavy hydrocarbon using asphaltene precipitant additives 有权
公开(公告)号：US09670760B2
公开(公告)日：2017-06-06
申请号：US14066993
申请日：2013-10-30
申请人： Chevron U.S.A. Inc.
发明人： Cesar Ovalles , Estrella Rogel
IPC分类号： E21B43/22 , E21B43/16 , C09K8/594 , C10G73/38 , E21B43/28
CPC分类号： E21B43/16 , C09K8/594 , C09K2208/10 , C10G73/38 , C10G2300/302 , C10G2300/4037 , E21B43/28
摘要： A process for in-situ upgrading of a heavy hydrocarbon includes positioning a well in a reservoir containing a heavy hydrocarbon having an initial API gravity no greater than about 20, an n-heptane asphaltene content at least about 1 wt. %, and a viscosity at 35° C. greater than about 350 centistokes; injecting hydrocarbon solvent(s) and asphaltene precipitant additive(s) into the well at a ratio by volume of the solvent to the heavy hydrocarbon of about 0.1:1 to about 20:1 under reservoir conditions so as to provide an upgraded hydrocarbon in the reservoir having an improved API gravity, a reduced asphaltene content, and a lower viscosity; and producing the upgraded hydrocarbon from the well. The process of the present invention can be also carried out at higher temperatures such as by injecting steam with the one or more hydrocarbon solvents and the one or more asphaltene precipitant additives into the well.

3. 发明申请

US20160376883A1 Antenna Operation for Reservoir Heating 审中-公开
标题翻译：天然气采暖工作
公开(公告)号：US20160376883A1
公开(公告)日：2016-12-29
申请号：US15192210
申请日：2016-06-24
申请人： Chevron U.S.A. Inc.
发明人： Gunther H. Dieckmann , Cesar Ovalles
IPC分类号： E21B43/24 , H05B6/10 , E21B43/38
CPC分类号： E21B43/2401 , H05B6/62 , H05B2214/03
摘要： Systems and methods are provided for maintaining the performance and operational stability of an RF (radio frequency) antenna that is positioned in a hydrocarbon-bearing formation, for heating the formation using electromagnetic energy in the radio frequency range.Contaminants such as water or brine, metallic particulates and ionic or organic materials frequently occur in a wellbore being prepared for RF heating, or in an RF antenna installed in the wellbore. Prior to applying RF electrical energy to the formation, the antenna is decontaminated by circulating a preconditioning fluid through the antenna and recovering a spent fluid for treating and recycle. Decontamination is continued while the spent fluid from the antenna includes, but not limited to, water, metallic particles, ionic species, organic compounds contaminants, etc. An operational power level of radio frequency electrical energy is then applied to the decontaminated antenna for providing thermal energy to the hydrocarbon-bearing formation.
摘要翻译：污染物例如水或盐水，金属微粒和离子或有机材料经常发生在准备用于RF加热的井筒中，或在安装在井眼中的RF天线中。在将RF电能应用于地层之前，通过使预处理流体循环通过天线并且回收用于处理和再循环的废流体来对天线进行净化。去污是继续的，而来自天线的废流包括但不限于水，金属颗粒，离子物质，有机化合物污染物等。然后将射频电能的工作功率水平施加到去污天线上以提供热能量到含烃地层。

4. 发明授权

US10865629B2 Antenna operation for reservoir heating 有权
公开(公告)号：US10865629B2
公开(公告)日：2020-12-15
申请号：US16224058
申请日：2018-12-18
申请人： Chevron U.S.A. Inc.
发明人： Gunther H. Dieckmann , Cesar Ovalles
IPC分类号： E21B43/24 , H05B6/62
CPC分类号： E21B43/2401 , H05B6/62 , H05B2214/03
摘要： Systems and methods are provided for maintaining the performance and operational stability of an RF (radio frequency) antenna that is positioned in a hydrocarbon-bearing formation, for heating the formation using electromagnetic energy in the radio frequency range. Contaminants such as water or brine, metallic particulates and ionic or organic materials frequently occur in a wellbore being prepared for RF heating, or in an RF antenna installed in the wellbore. Prior to applying RF electrical energy to the formation, the antenna is decontaminated by circulating a preconditioning fluid through the antenna and recovering a spent fluid for treating and recycle. Decontamination is continued while the spent fluid from the antenna includes, but not limited to, water, metallic particles, ionic species, organic compounds contaminants, etc. An operational power level of radio frequency electrical energy is then applied to the decontaminated antenna for providing thermal energy to the hydrocarbon-bearing formation.

5. 发明授权

US10704371B2 Low dielectric zone for hydrocarbon recovery by dielectric heating 有权
公开(公告)号：US10704371B2
公开(公告)日：2020-07-07
申请号：US15783640
申请日：2017-10-13
申请人： Chevron U.S.A. Inc.
发明人： Gunther H. Dieckmann , Michal Mieczyslaw Okoniewski , Cesar Ovalles , Pedro Vaca , James Dunlavey , Donald Kuehne
IPC分类号： E21B43/24 , E21B33/13 , E21B33/14 , E21B7/28
摘要： Embodiments include drilling a wellbore in a hydrocarbon-bearing formation, and the wellbore includes a radio frequency antenna destination portion that is configured to receive a radio frequency antenna; forming a low dielectric zone in the hydrocarbon-bearing formation proximate to the radio frequency antenna destination portion with a cavity based process or a squeezing based process; positioning the radio frequency antenna into the radio frequency antenna destination portion such that the radio frequency antenna is proximate to the low dielectric zone; dielectric heating the hydrocarbon-bearing formation with the radio frequency antenna such that the low dielectric zone increases dissipation of energy from the radio frequency antenna into the hydrocarbon-bearing formation; and extracting hydrocarbons from the heated hydrocarbon-bearing formation. The material has a dielectric constant of less than or equal to 20, a loss tangent of less than or equal to 0.4, and a porosity of less than or equal to 5%.

6. 发明授权

US10975291B2 Method of selection of asphaltene precipitant additives and process for subsurface upgrading therewith 有权
公开(公告)号：US10975291B2
公开(公告)日：2021-04-13
申请号：US15890459
申请日：2018-02-07
申请人： Chevron U.S.A. Inc.
发明人： Cesar Ovalles , Estrella Rogel , Ian Phillip Benson , Ronald A. Behrens
IPC分类号： C09K8/594 , E21B43/26 , E21B43/24 , E21B43/38 , C09K8/62
摘要： In-situ upgrading of heavy hydrocarbons includes injecting into a reservoir solvent, an asphaltene precipitant additive and optionally steam, at a ratio of solvent to heavy hydrocarbon between 0.1:1 and 20:1 under reservoir conditions. The additive has C—H, C—C and/or C—O bonds that thermally crack to generate free radicals in the vapor phase after injection. Formed downhole are a blend containing an upgraded hydrocarbon, and precipitated asphaltenes. The upgraded hydrocarbon is produced such that the precipitated asphaltenes remain in the reservoir. The upgraded hydrocarbon has a greater API gravity, lower asphaltene content, and lower viscosity than the heavy hydrocarbon. The precipitated asphaltenes are present in a higher amount than a similar blend not containing the additive. A method for selecting the additive includes identifying candidate additives having bonds that crack to generate free radicals in the vapor phase at the operating temperature, and calculating percent increase of asphaltenes precipitated for each.

7. 发明授权

US10865628B2 Antenna operation for reservoir heating 有权
公开(公告)号：US10865628B2
公开(公告)日：2020-12-15
申请号：US16223944
申请日：2018-12-18
申请人： Chevron U.S.A. Inc.
发明人： Gunther H. Dieckmann , Cesar Ovalles
IPC分类号： E21B43/24 , H05B6/62
CPC分类号： E21B43/2401 , H05B6/62 , H05B2214/03
摘要： Systems and methods are provided for maintaining the performance and operational stability of an RF (radio frequency) antenna that is positioned in a hydrocarbon-bearing formation, for heating the formation using electromagnetic energy in the radio frequency range. Contaminants such as water or brine, metallic particulates and ionic or organic materials frequently occur in a wellbore being prepared for RF heating, or in an RF antenna installed in the wellbore. Prior to applying RF electrical energy to the formation, the antenna is decontaminated by circulating a preconditioning fluid through the antenna and recovering a spent fluid for treating and recycle. Decontamination is continued while the spent fluid from the antenna includes, but not limited to, water, metallic particles, ionic species, organic compounds contaminants, etc. An operational power level of radio frequency electrical energy is then applied to the decontaminated antenna for providing thermal energy to the hydrocarbon-bearing formation.

8. 发明申请

US20190170725A1 METHOD FOR ESTIMATING SEDIMENT CONTENT OF A HYDROPROCESSED HYDROCARBON-CONTAINING FEEDSTOCK 审中-公开
公开(公告)号：US20190170725A1
公开(公告)日：2019-06-06
申请号：US16272659
申请日：2019-02-11
申请人： Chevron U.S.A. Inc.
发明人： Estrella Rogel , Cesar Ovalles , Pak Leung
IPC分类号： G01N33/28
摘要： Disclosed herein is a method of estimating sediment content of a hydroprocessed hydrocarbon-containing feedstock. The method involves the steps of: (a) precipitating an amount of asphaltenes from a liquid sample of a first hydroprocessed hydrocarbon-containing feedstock having solvated asphaltenes therein with one or more first solvents in a column; (b) determining one or more solubility characteristics of the precipitated asphaltenes; (c) analyzing the one or more solubility characteristics of the precipitated asphaltenes; (d) determining asphaltene content of the liquid sample from the results of analyzing the one or more solubility characteristics of the precipitated asphaltenes; (e) determining one or more asphaltene stability parameters of the liquid sample from the results of analyzing the one or more solubility characteristics of the precipitated asphaltenes; and (f) correlating the asphaltene content and one of the asphaltene stability parameters of the liquid sample to estimate sediment content of the liquid sample.

9. 发明授权

US10184330B2 Antenna operation for reservoir heating 有权
公开(公告)号：US10184330B2
公开(公告)日：2019-01-22
申请号：US15192210
申请日：2016-06-24
申请人： Chevron U.S.A. Inc.
发明人： Gunther H. Dieckmann , Cesar Ovalles
IPC分类号： E21B43/24 , H05B6/62
摘要： Systems and methods are provided for maintaining the performance and operational stability of an RF (radio frequency) antenna that is positioned in a hydrocarbon-bearing formation, for heating the formation using electromagnetic energy in the radio frequency range. Contaminants such as water or brine, metallic particulates and ionic or organic materials frequently occur in a wellbore being prepared for RF heating, or in an RF antenna installed in the wellbore. Prior to applying RF electrical energy to the formation, the antenna is decontaminated by circulating a preconditioning fluid through the antenna and recovering a spent fluid for treating and recycle. Decontamination is continued while the spent fluid from the antenna includes, but not limited to, water, metallic particles, ionic species, organic compounds contaminants, etc. An operational power level of radio frequency electrical energy is then applied to the decontaminated antenna for providing thermal energy to the hydrocarbon-bearing formation.

10. 发明授权

US10137486B1 Systems and methods for thermal treatment of contaminated material 有权
公开(公告)号：US10137486B1
公开(公告)日：2018-11-27
申请号：US15906175
申请日：2018-02-27
申请人： Chevron U.S.A. Inc.
发明人： Roopa Kamath , Schaun Malcolm Smith , Deyuan Kong , Gunther H. Dieckmann , Cesar Ovalles
IPC分类号： B09C1/00 , B09C1/02 , B09C1/06 , B09C1/08 , B09C1/10
摘要： Contaminant-containing soil can be remediated by subjecting the soil to microwave irradiation to heat the soil to a combustion temperature of from 150° C. to 1200° C. to initiate combustion. A target amount of the contaminant in the soil is destroyed. An oxidizer gas can be flowed through the soil using a gas blower and at least one gas injection line and controlled at a rate such that a self-sustaining smoldering combustion front is formed that moves through the soil. A microwave absorber additive can be added to the soil to accelerate the heating of the soil. At least one waveguide connected to a source of microwave energy directs microwaves into the soil.

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