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公开(公告)号：US20180202273A1
公开(公告)日：2018-07-19
申请号：US15861909
申请日：2018-01-04
Applicant: Chevron U.S.A. Inc.
Inventor： Raymond Stanley Kasevich , Jeb Xiaobing Rong , James Preston Koffer , Mark Dean Looney , Margaretha Catharina Maria Rijken
CPC classification number: E21B43/26 , E21B7/15 , E21B33/124 , E21B43/006 , E21B43/168 , E21B43/24
Abstract: Embodiments of generating controlled fractures in geologic formation are provided herein. In one embodiment, a method comprises preconditioning by applying a sufficient amount of energy comprising AC power to the electrodes to induce an electrical field between opposite electrode contact points to generate a least one conductive channel between a pair of electrodes. The generation of the conductive channel is complete when current flow measured by a network analyzer exhibits a measured reduction of channel resistance of 90% ohms or more in 6 hours or less from when preconditioning first began. The method further comprises, subsequent to generating the conductive channel, fracturing by applying electrical impulses to the electrodes. The application of the electrical pulses generates multiple controlled fractures within and about the conductive channel. The energy is applied using a single phase configuration, a multiphase configuration, or any combination thereof.
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Patent Agency Ranking
公开(公告)号：US09840898B2
公开(公告)日：2017-12-12
申请号：US14568779
申请日：2014-12-12
Applicant: Chevron U.S.A. Inc.
Inventor： Raymond Stanley Kasevich , Jeb Xiaobing Rong , James Preston Koffer , Mark Dean Looney , Margaretha Catharina Maria Rijken
CPC classification number: E21B43/26 , E21B7/15 , E21B33/124 , E21B43/006 , E21B43/168 , E21B43/24
Abstract: Controlled fracturing in geologic formations is carried out by a system for generating fractures. The system comprises: a plurality of electrodes for placing in boreholes in a formation with one electrode per borehole, for the plurality of electrodes to define a fracture pattern for the geologic formation; a first electrical system for delivering a sufficient amount of energy to the electrodes to generate a conductive channel between the pair of electrodes with the conductivity in the channel has a ratio of final to initial channel conductivity of 10:1 to 50,000:1, wherein the sufficient amount of energy is selected from electromagnetic conduction, radiant energy and combinations thereof; and a second electrical system for generating electrical impulses with a voltage output ranging from 100-2000 kV, with the pulses having a rise time ranging from 0.05-500 microseconds and a half-value time of 50-5000 microseconds.
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公开(公告)号：US20150167439A1
公开(公告)日：2015-06-18
申请号：US14568760
申请日：2014-12-12
Applicant: Chevron U.S.A. Inc.
Inventor： Raymond Stanley Kasevich , Jeb Xiaobing Rong , James Preston Koffer , Mark Dean Looney , Margaretha Catharina Maria Rijken
CPC classification number: E21B43/26 , E21B7/15 , E21B33/124 , E21B43/006 , E21B43/168 , E21B43/24
Abstract: Controlled fracturing in geologic formations is carried out in a method employing a combination of alternating and impulsive current waveforms, applied in succession to achieve extensive fracturing and disintegration of rock materials for liquid and gas recovery. In a pre-conditioning step, high voltage discharges and optionally with highly ionizable gas injections are applied to a system of borehole electrodes, causing the formation to fracture with disintegration in multiple directions but confined between the locations of electrode pairs of opposite polarity. After pre-conditioning, intense current waveform of pulse energy is then applied to the system of borehole electrodes to create waves of ionization or shock waves with bubbles of heated gas that propagate inside and outside the high conductivity channels, resulting in rock disintegration with attendant large scale multiple fracturing.
Abstract translation: 在地质构造中的控制压裂是采用交替和脉冲电流波形的组合的方法进行的，连续施加以实现用于液体和气体回收的岩石材料的广泛的压裂和分解。 在预处理步骤中，将高压放电和任选地具有高度可离子化的气体注入施加到钻孔电极的系统，导致地层在多个方向上分解而断裂，但被限制在相反极性的电极对的位置之间。 预处理后，将脉冲能量的强电流波形施加到钻孔电极系统，以产生电离波或冲击波，伴随着高导电通道内外传播的加热气泡，导致岩石瓦解与伴随大的 规模多次压裂。
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公开(公告)号：US10400568B2
公开(公告)日：2019-09-03
申请号：US15861909
申请日：2018-01-04
Applicant: Chevron U.S.A. Inc.
Inventor： Raymond Stanley Kasevich , Jeb Xiaobing Rong , James Preston Koffer , Mark Dean Looney , Margaretha Catharina Maria Rijken
Abstract: Embodiments of generating controlled fractures in geologic formation are provided herein. In one embodiment, a method comprises preconditioning by applying a sufficient amount of energy comprising AC power to the electrodes to induce an electrical field between opposite electrode contact points to generate a least one conductive channel between a pair of electrodes. The generation of the conductive channel is complete when current flow measured by a network analyzer exhibits a measured reduction of channel resistance of 90% ohms or more in 6 hours or less from when preconditioning first began. The method further comprises, subsequent to generating the conductive channel, fracturing by applying electrical impulses to the electrodes. The application of the electrical pulses generates multiple controlled fractures within and about the conductive channel. The energy is applied using a single phase configuration, a multiphase configuration, or any combination thereof.
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公开(公告)号：US09890627B2
公开(公告)日：2018-02-13
申请号：US14568760
申请日：2014-12-12
Applicant: Chevron U.S.A. Inc.
Inventor： Raymond Stanley Kasevich , Jeb Xiaobing Rong , James Preston Koffer , Mark Dean Looney , Margaretha Catharina Maria Rijken
CPC classification number: E21B43/26 , E21B7/15 , E21B33/124 , E21B43/006 , E21B43/168 , E21B43/24
Abstract: Controlled fracturing in geologic formations is carried out in a method employing a combination of alternating and impulsive current waveforms, applied in succession to achieve extensive fracturing and disintegration of rock materials for liquid and gas recovery. In a pre-conditioning step, high voltage discharges and optionally with highly ionizable gas injections are applied to a system of borehole electrodes, causing the formation to fracture with disintegration in multiple directions but confined between the locations of electrode pairs of opposite polarity. After pre-conditioning, intense current waveform of pulse energy is then applied to the system of borehole electrodes to create waves of ionization or shock waves with bubbles of heated gas that propagate inside and outside the high conductivity channels, resulting in rock disintegration with attendant large scale multiple fracturing.
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公开(公告)号：US20150167440A1
公开(公告)日：2015-06-18
申请号：US14568779
申请日：2014-12-12
Applicant: Chevron U.S.A. Inc.
Inventor： Raymond Stanley Kasevich , Jeb Xiaobing Rong , James Preston Koffer , Mark Dean Looney , Margaretha Catharina Maria Rijken
IPC: E21B43/26 , E21B47/00 , E21B33/124 , E21B43/16
CPC classification number: E21B43/26 , E21B7/15 , E21B33/124 , E21B43/006 , E21B43/168 , E21B43/24
Abstract: Controlled fracturing in geologic formations is carried out by a system for generating fractures. The system comprises: a plurality of electrodes for placing in boreholes in a formation with one electrode per borehole, for the plurality of electrodes to define a fracture pattern for the geologic formation; a first electrical system for delivering a sufficient amount of energy to the electrodes to generate a conductive channel between the pair of electrodes with the conductivity in the channel has a ratio of final to initial channel conductivity of 10:1 to 50,000:1, wherein the sufficient amount of energy is selected from electromagnetic conduction, radiant energy and combinations thereof; and a second electrical system for generating electrical impulses with a voltage output ranging from 100-2000 kV, with the pulses having a rise time ranging from 0.05-500 microseconds and a half-value time of 50-5000 microseconds.
Abstract translation: 地质构造中的受控压裂由一个产生裂缝的系统进行。 该系统包括：多个电极，用于放置在钻孔中的钻孔中，每个钻孔具有一个电极，多个电极限定用于地质构造的断裂图案; 用于向电极传送足够量的能量以在该对电极之间具有导电性的通道中的导电通道的第一电气系统具有10:1至50,000:1的最终至初始通道电导率的比率，其中 从电磁传导，辐射能及其组合中选出足够的能量; 以及用于产生电压输出范围为100-2000kV的电脉冲的第二电气系统，脉冲的上升时间为0.05-500微秒，半值时间为50-5000微秒。
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