RU2012122536A - METHOD AND DEVICE FOR MEASURING THE APPEARANCE OF ELECTRIC RESISTANCE OF BREEDS UNDER CONDITIONS OF PREPARED WELLS - Google Patents
METHOD AND DEVICE FOR MEASURING THE APPEARANCE OF ELECTRIC RESISTANCE OF BREEDS UNDER CONDITIONS OF PREPARED WELLS Download PDFInfo
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- RU2012122536A RU2012122536A RU2012122536/28A RU2012122536A RU2012122536A RU 2012122536 A RU2012122536 A RU 2012122536A RU 2012122536/28 A RU2012122536/28 A RU 2012122536/28A RU 2012122536 A RU2012122536 A RU 2012122536A RU 2012122536 A RU2012122536 A RU 2012122536A
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- electrical resistance
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Abstract
1. Способ измерения кажущегося электрического сопротивления пород в условиях обсаженных скважин, заключающийся в возбуждении импульсного электромагнитного поля и измерении параметров вихревых токов в породах, отличающийся тем, что возбуждение электромагнитного поля производят с помощью генераторной соленоидной катушки индуктивности, питаемой разнополярными импульсами тока длительностью, например, 150 ms, а прием нестационарного магнитного поля вихревых токов в породах производят соленоидной катушкой индуктивности с ферритовым сердечником в диапазоне времен от 150 ms до 500 ms от момента выключения тока питания генераторной соленоидной катушки в непрерывном режиме, при этом сигнал с приемной катушки предварительно усиливают за счет применения высокодобротного контура ударного возбуждения, включающего тороидальную катушку индуктивности, и по анализу кривых спада электромагнитного поля производят расчет кажущегося электрического сопротивления.2. Устройство для измерения кажущегося электрического сопротивления пород в условиях обсаженных скважин, содержащее генераторную и компенсационную катушки, размещенные соосно и коаксиально и соединенные встречно через источник зондирующего тока; приемную катушку, блок согласования и регистрирующее устройство, вход которого соединен с выходом блока согласования, отличающееся тем, что устройство снабжено дополнительной катушкой индуктивности тороидальной формы, размещенной на сердечнике, выполненном из ферромагнитного материала, и соединенной с приемной катушкой через коммутирующие элементы и параллельно с блоком согласования, при этом время замкнутого с1. A method of measuring the apparent electrical resistance of rocks in cased hole conditions, which consists in exciting a pulsed electromagnetic field and measuring the parameters of eddy currents in rocks, characterized in that the electromagnetic field is excited using a generator solenoid inductor fed by bipolar current pulses of duration, for example, 150 ms, and the unsteady magnetic field of eddy currents in the rocks is received by a solenoid inductance coil with a ferrite heart in the time range from 150 ms to 500 ms from the moment the supply current of the generator solenoid coil is turned off in continuous mode, while the signal from the receiving coil is preliminarily amplified by using a high-quality shock excitation circuit, including a toroidal inductor, and by analyzing the decay curves of the electromagnetic field calculate the apparent electrical resistance. 2. A device for measuring the apparent electrical resistance of rocks in cased-hole conditions, comprising generator and compensation coils placed coaxially and coaxially and connected counter-through a sounding current source; receiving coil, matching unit and recording device, the input of which is connected to the output of matching unit, characterized in that the device is equipped with an additional toroidal inductance coil located on a core made of ferromagnetic material and connected to the receiving coil through switching elements and in parallel with the block coordination, while closed time with
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RU2012122536/28A RU2526520C2 (en) | 2012-05-31 | 2012-05-31 | Method and device for measurement of apparent electric resistance of rocks in cased well |
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RU2012122536/28A RU2526520C2 (en) | 2012-05-31 | 2012-05-31 | Method and device for measurement of apparent electric resistance of rocks in cased well |
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RU2012122536A true RU2012122536A (en) | 2013-12-10 |
RU2526520C2 RU2526520C2 (en) | 2014-08-20 |
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RU2012122536/28A RU2526520C2 (en) | 2012-05-31 | 2012-05-31 | Method and device for measurement of apparent electric resistance of rocks in cased well |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2583867C1 (en) * | 2015-02-20 | 2016-05-10 | Открытое акционерное общество "Нефтяная компания "Роснефть" | Electromagnetic probe for logging in oil and gas wells |
RU2614853C2 (en) * | 2015-03-05 | 2017-03-29 | Федеральное государственное бюджетное учреждение науки Институт геофизики им. Ю.П. Булашевича Уральского отделения Российской академии наук | Method of inductive logging from cased wells and device for its implementation |
RU2668650C1 (en) * | 2017-11-20 | 2018-10-02 | Федеральное государственное бюджетное учреждение науки Институт геофизики им. Ю.П. Булашевича Уральского отделения Российской академии наук | Method of impulse induction electric coring from cased wells |
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SU855586A1 (en) * | 1979-12-17 | 1981-08-15 | Днепропетровский Ордена Трудового Красного Знамени Государственный Университет Им. 300-Летия Воссоединения Украины С Россией | Device for electromagnetic well-logging |
US6975121B2 (en) * | 2004-03-22 | 2005-12-13 | Kjt Enterprises, Inc. | System for measuring earth formation resistivity through and electrically conductive wellbore casing |
US20100271030A1 (en) * | 2005-01-18 | 2010-10-28 | Baker Hughes Incorporated | Borehole Transient EM System for Reservoir Monitoring |
RU2316026C1 (en) * | 2006-03-10 | 2008-01-27 | Открытое акционерное общество "Объединенная энергетическая группа "Петросервис" | Method of electromagnet survey of rocks behind precipitation column |
WO2010087730A1 (en) * | 2009-01-27 | 2010-08-05 | Baker Hughes Incorporated | Electromagnetic logging in time domain with use of specific current pulses |
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