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1. 发明申请

WO9825164A2 WELL LOGGING METHOD AND APPARATUS FOR NMR AND RESISTIVITY MEASUREMENTS 审中-公开
标题翻译：井记录方法和核磁共振和电阻测量装置
公开(公告)号：WO9825164A2
公开(公告)日：1998-06-11
申请号：PCT/US9721889
申请日：1997-11-26
申请人： SCHLUMBERGER TECHNOLOGY BV , SCHLUMBERGER CA LTD , SCHLUMBERGER LTD , SERVICE PETROLIERS SCHLUMBERGE
发明人： SEZGINER ABDURRAHMAN , GRIFFIN DOUGLAS
IPC分类号： G01V3/32
CPC分类号： G01V3/32
摘要： A method is disclosed for determining a nuclear magnetic resonance characteristic and the resistivity of earth formations surrounding a borehole, including the following steps: passing a logging device through the borehole; producing, at the logging device, a static magnetic field; producing, at the logging device, electromagnetic energy having a field component in the formations that is orthogonal to the static magnetic field; receiving, at the logging device, electromagnetic energy that has passed through said formations; and determining, from the received electromagnetic energy, the nuclear magnetic resonance characteristic of the formations and the resistivity of the formations.
摘要翻译：公开了一种用于确定核磁共振特性和围绕钻孔的地层的电阻率的方法，包括以下步骤：将测井装置通过钻孔; 在测井装置处产生静磁场; 在测井装置处产生在与静磁场正交的地层中具有场分量的电磁能; 在测井装置处接收已经通过所述地层的电磁能; 并从接收的电磁能确定地层的核磁共振特征和地层的电阻率。

2. 发明专利

CA2405077C METHOD AND APPARATUS FOR INVESTIGATING THE WALL OF A BOREHOLE 未知
公开(公告)号：CA2405077C
公开(公告)日：2010-10-19
申请号：CA2405077
申请日：2001-03-29
申请人： SCHLUMBERGER CA LTD
发明人： CHEUNG PHILIP , HAYMAN ANDREW , PITTMAN DENNIS , SEZGINER ABDURRAHMAN
IPC分类号： G01V3/24
摘要： The present invention relates to a method of investigating the wall (2) of a borehole in a geological formation by means of two injectors (4, 5) with a potential V being applied between them and in measuring the potential difference .delta.V between two electrically isolated measurement electrodes (6) situated between the two injectors (4, 5) and spaced apart from the formation by an insulating layer (1), in which the resistivity of the formation is obtained from the measured values of .delta.V, V and I, with corrections being made for the effects due to the nature and the thickness of the insulating layer (1). In a first variant these corrections are based on a correction factor obtained from curves of K = Rt.I/.delta.V as a function of the impedance V/I of the injector. In a second variant these corrections are obtained by estimating the current I F actually injected into the formation while taking account of leakage current I L, and calculating the resistivity of the formation from the equation (I). The invention also provides an investigation device enabling the values of I F and/or I L to be estimated.

3. 发明专利

CA2287773C DOWNHOLE NMR TOOL HAVING A PROGRAMMABLE PULSE SEQUENCER 未知
公开(公告)号：CA2287773C
公开(公告)日：2007-01-02
申请号：CA2287773
申请日：1999-11-01
申请人： SCHLUMBERGER CA LTD
发明人： DEPAVIA LUIS E , JORION BRUNO , TOUFAILY ALI K , SEZGINER ABDURRAHMAN
IPC分类号： G01V3/32 , E21B20060101 , E21B49/00 , G01N24/08 , G01R33/36 , G01R33/44 , G01R33/54 , G01R33/563 , G01V20060101 , G01V3/00 , G01V3/18
摘要： An NMR logging tool includes at least one antenna and a pulse sequencer. The pulse sequencer is coupled to said at least one antenna and is adapted to receive state descriptors that are indicative of states of an NMR measurement sequence. The pulse sequencer uses the antenna(e) to perform the NMR measurement sequence downhole in a subterranea n formation in response to the state descriptors.

4. 发明专利

CA2437850C HIGH VERTICAL RESOLUTION ANTENNAS FOR NMR LOGGING 未知
公开(公告)号：CA2437850C
公开(公告)日：2006-08-01
申请号：CA2437850
申请日：2003-08-20
申请人： SCHLUMBERGER CA LTD
发明人： TAHERIAN REZA , SEZGINER ABDURRAHMAN , SUN BOQIN
IPC分类号： G01V3/32 , G01R33/44 , G01V3/38
摘要： A high vertical resolution antenna design is provided for use in an NMR measurement apparatus. Multiple coils are situated along the length of a magnet. A primary coil is energized to cause an oscillating magnetic field in a portio n of earth formation surrounding a borehole. A secondary coil having smaller dimensions than the primary coil is operated to receive spin echoes from a depth of investigatio n associated with the secondary coil. A distance sufficient to minimize electrical coupli ng separates the coils. The separation distance can be reduced by selecting a secondary coil with orthogonal polarization to the primary coil. Alternatively, a cross coil configuration can be implemented where the orthogonal secondary coil at least partially overla ps the primary coil, thereby reducing the overall length necessary for the polarizi ng magnet.

5. 发明专利

CA2147790C METHOD AND APPARATUS FOR MEASURING FORMATION RESISTIVITY IN CASED HOLES 未知
公开(公告)号：CA2147790C
公开(公告)日：2004-02-24
申请号：CA2147790
申请日：1995-04-25
申请人： SCHLUMBERGER CA LTD
发明人： SEZGINER ABDURRAHMAN , DRUSKIN VLADIMIR L
IPC分类号： G01V3/20 , G01V3/22 , G01V3/18
摘要： A method of determining the resistivity of an underground formation surrounding a cased borehole including the steps of: a) passing a current along a first pa rt of the casing and measuring the voltage; b) passing a current along a second part of the casing and measuring the voltage, the second part being spaced from the first part by a n intermediate region; c) measuring voltages between the first part of the casing and a poi nt in the intermediate region and between the second part of the casing and the same point; and d) using the measured voltages to derive the resistivity of the formation. A logging tool for use in determining the resistivity of an underground formation surrounding a cased borehole includes a body having first and second parts separated by an intermediate region, wherein: a) the first body part includes a first current source having space d electrodes arranged so as to enable a current to be passed through a corresponding part of the casing and a voltage monitor having spaced electrodes for measuring the voltage across the part of the casing; b) the second body part includes second current source having spaced electrodes arranged so as to enable a current to be passed through a corresponding part of the casing and a second voltage monitor having spaced electrodes for measuring the voltage across the part of the casing; and c) the intermediate region includes intermediate voltage monitors including electrodes for measuring a voltage between the first part of the casing and a point in a corresponding intermediate region of the casing, and between the second part of the casing and the point in the intermediate region of the casing so as to enabl e the formation resistivity to be derived from the measured voltages.

6. 发明专利

CA2281137A1 METHOD AND APPARATUS FOR PERFORMING MAGNETIC RESONANCE MEASUREMENTS 未知
公开(公告)号：CA2281137A1
公开(公告)日：2000-02-18
申请号：CA2281137
申请日：1999-08-17
申请人： SCHLUMBERGER CA LTD
发明人： SUN BOQIN Q , DAVIES DYLAN H , HEATON NICHOLAS J , SEZGINER ABDURRAHMAN , TAHERIAN M REZA
IPC分类号： G01R33/44 , G01R33/563 , G01N24/08
摘要： A magnetic resonance measurement apparatus that is subject to relative motion between the apparatus and a specimen along a path includes a magnet, antennae and a circuit. The magnet polarizes the specimen, and the antennae are spatially distributed along the path. The circuit uses the antennae to perform magnetic resonance measurements and use the spatial distribution of the antennae to establish different polarization times for the magnetic resonance measurements.

7. 发明专利

CA2246180A1 METHOD AND APPARATUS FOR MEASURING NUCLEAR MAGNETIC RESONANCE 未知
公开(公告)号：CA2246180A1
公开(公告)日：1999-03-25
申请号：CA2246180
申请日：1998-08-28
申请人： SCHLUMBERGER CA LTD
发明人： SEZGINER ABDURRAHMAN , SUN BOQIN , SEN PABITRA N , TAHERIAN REZA
IPC分类号： G01R33/44 , G01V3/32
摘要： The present invention relates generally to an apparatus and method for measu ringnuclear magnetic resonance properties of an earth fo rmation traversed by a borehole by generating gradient-echoes. The measurement can be made while drilling or us ing a wireline tool. The apparatus applies a static magnetic field, B a, in a volu me of the formation which polarizes the nuclei of hydrogenous connate fluids within the formatio n. The apparatus applies a second magnetic field, B b, in a volume of the formation . The magnetic fields B a and B b are substantially orthogonal in the volume of the formati on. A change in the polarity of the magnetic field, B b, reverses the direction of precessio n of the nuclei thereby generating a train of gradient-echoes. Each gradient-echo signal is transformed into the frequency domain and the signal frequency is mapped to a radial position in the volume of the formation in order to generate an image of the formation. Various pro perties of the formation, such as the effective diffusion coefficient of the formation flui d, longitudinal relaxation time, spin-spin relaxation time, and porosity can be estimated fr om the train of gradient-echoes.

8. 发明专利

CA2245720A1 WELL LOGGING METHOD AND APPARATUS FOR NMR AND RESISTIVITY MEASUREMENTS 未知
公开(公告)号：CA2245720A1
公开(公告)日：1998-06-11
申请号：CA2245720
申请日：1997-11-26
申请人： SCHLUMBERGER TECHNOLOGY BV , SERVICE PETROLIERS SCHLUMBERGE , SCHLUMBERGER CA LTD , SCHLUMBERGER LTD
发明人： GRIFFIN DOUGLAS , SEZGINER ABDURRAHMAN
IPC分类号： G01V3/32 , G01V11/00
摘要： A method is disclosed for determining a nuclear magnetic resonance characteristic and the resistivity of earth formations surrounding a borehole, including the following steps: passing a logging device through the borehole; producing, at the logging device, a static magnetic field; producing, at the logging device, electromagnetic energy having a field component in the formations that is orthogonal to the static magnetic field; receiving, at the logging device, electromagnetic energy that has passed through said formations; and determining, from the received electromagnetic energy, the nuclear magnetic resonance characteristic of the formations and the resistivity of the formations.

9. 发明专利

CA2323654C WELLBORE ANTENNAE SYSTEM AND METHOD 未知
公开(公告)号：CA2323654C
公开(公告)日：2007-12-04
申请号：CA2323654
申请日：2000-10-18
申请人： SCHLUMBERGER CA LTD
发明人： CIGLENEC REINHART , TABANOU JACQUES R , SEZGINER ABDURRAHMAN
IPC分类号： E21B7/06 , E21B23/00 , E21B47/00 , E21B47/12 , E21B49/00 , E21B49/10 , H01Q1/36
摘要： An apparatus and a method for controlling oilfield production to improve efficiency includes a remote sensing unit that is placed within a subsurface formation, an antenna structure for communicating with the remote sensing unit, a casing joint having nonconductive "windows" for allowing a internally located antenna to communicate with the remote sensing unit, and a system for obtaining subsurface formation data and for producing the formati on data to a central location for subsequent analysis. The remote sensing unit is placed sufficiently far from the wellbore to reduce or eliminate effects that the wellbore might have on formation data samples taken by the remote sensing unit. The remote sensing unit is an active devic e with the capability of responding to control commands by determining certain subsurface formatio n characteristics such as pressure or temperature, and transmitting corresponding data values to a wellbore tool. The inventive system includes an antenna structure that is for delivering power and communication signals to the remote sensing unit. In one embodiment, the antenna structure is formed on an external surface of a wellbore casing. In another embodiment, t he antenna structure is formed on a downhole tool such as a drilling collar or a cased hole wireline tool. For thoseembodiments in which the antenna structure is formed on a cased holed wireline tool, a casing joint is provided that includes nonconductive windows for allowing RF signals to be transmitted from within the casing to the remote sensing unit and from the remote sensing unit to the wireline tool. An inventive method therefore includes providing RF power through the inventive antenna system to the remote sensing unit to wake it up and to pla ce it into an operational mode. The method further includes receiving modulated data value s from the remote sensing unit through the antenna system that are then transmitted to the surface where operational decisions for the well may be made.

10. 发明专利

CA2283996C ESTIMATING PERMEABILITY 未知
公开(公告)号：CA2283996C
公开(公告)日：2004-11-02
申请号：CA2283996
申请日：1999-09-28
申请人： SCHLUMBERGER CA LTD
发明人： MINH CHANH CAO , HEATON NICHOLAS J , SEZGINER ABDURRAHMAN
IPC分类号： G01N15/08 , G01R33/44 , G01R33/46 , G01V3/32 , G01V3/38 , G01V3/14
摘要： A permeability estimation technique for use with spin echo signals that are received from a sample includes summing indications of the amplitudes of the spin echo signals. The results of the summing are used to determine an indication of a permeability of the sample, without using a distribution of relaxation times in the determination. The products of indications of the amplitudes of the spin echo signals may be summed, and the results of the summing may be used to determine an indication of a permeability of the sample, without using a distribution of relaxation times in the determination.

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