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    COMPACT RADIATION GENERATOR
    102.
    发明公开
    COMPACT RADIATION GENERATOR 审中-公开
    KOMPAKTER STRAHLUNGSGENERATOR

    公开(公告)号：EP2502236A2

    公开(公告)日：2012-09-26

    申请号：EP10830841.2

    申请日：2010-11-15

    Applicant: Schlumberger Technology B.V. ,  PRAD Research and Development Limited ,  Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited

    Inventor： GROVES, Joel, L. ,  PERKINS, Luke, T. ,  GUIZELIN, Fabien ,  WRAIGHT, Peter

    IPC: G21G4/02 ,  H05H1/02

    CPC classification number: G21G4/02 ,  H05H3/06

    Abstract: Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.

    Abstract translation: 公开了一种辐射测井工具，包括工具壳体; 产生辐射的紧凑型发电机; 耦合到紧凑型发电机的电源; 和控制电路。 紧凑型发电机的实施例包括发电机真空管，其包括产生带电粒子的源和带电粒子被引导到其上的靶; 以及高压电源，其包括位于发电机真空管的横向相邻的高电压倍增梯。 高电压源在源极和靶之间施加高电压以将带电粒子加速到预定的能级。 紧凑型发电机还包括高压电源的输出端和发电机真空管的目标之间的电耦合，以适应发电机真空管和高压电源的并置位置。

    MULTISCALE FINITE VOLUME METHOD FOR RESERVOIR SIMULATION
    103.
    发明公开
    MULTISCALE FINITE VOLUME METHOD FOR RESERVOIR SIMULATION 审中-公开
    储层模拟的多尺度有限体积法

    公开(公告)号：EP2494385A2

    公开(公告)日：2012-09-05

    申请号：EP10828901.8

    申请日：2010-10-27

    Applicant: Chevron U.S.A. Inc. ,  Services Petroliers Schlumberger ,  Logined B.V. ,  PRAD Research and Development Limited

    Inventor： LUNATI, Ivan Fabrizio ,  TYAGI, Manav ,  LEE, Seong H.

    IPC: G01V9/02 ,  G06F19/00 ,  G06T17/05

    CPC classification number: E21B49/00 ,  G01V99/00 ,  G06F17/5018 ,  G06F2217/10 ,  G06F2217/16

    Abstract: A Multiscale Finite Volume (MSFV) method is provided to efficiently solve large heterogeneous problems; it is usually employed for pressure equations and delivers conservative flux fields to be used in transport problems. It relies on the hypothesis that the fine-scale problem can be described by a set of local solutions coupled by a conservative coarse-scale problem. In numerically challenging cases, a more accurate localization approximation is used to obtain a good approximation of the fine-scale solution. According to an embodiment, a method is provided to iteratively improve the boundary conditions of the local problems, and is responsive to the data structure of the underlying MSFV method and employs a Krylov-subspace projection method to obtain an unconditionally stable scheme and accelerate convergence. In one embodiment the MSFV operator is used. Alternately, the MSFV operator is combined with an operator derived from the problem solved to construct the conservative flux field.

    Abstract translation: 提供多尺度有限体积（MSFV）方法来有效地解决大型异构问题; 它通常用于压力方程，并提供用于运输问题的保守通量场。 它依赖于这样一个假设，即精细尺度问题可以用一组局部解来描述，这个局部解由一个保守的粗尺度问题耦合而成。 在数值上具有挑战性的情况下，使用更精确的定位近似来获得精细尺度解的良好近似。 根据一个实施例，提供一种迭代地改进局部问题的边界条件的方法，并且响应于底层MSFV方法的数据结构并且采用Krylov子空间投影方法来获得无条件稳定的方案并且加速收敛。 在一个实施例中，使用MSFV运营商。 或者，MSFV算子与从求解问题导出的算子结合构造守恒磁通场。

    ELECTROMAGNETIC LOGGING BETWEEN A CASED BOREHOLE AND SURFACE
    107.
    发明公开
    ELECTROMAGNETIC LOGGING BETWEEN A CASED BOREHOLE AND SURFACE 审中-公开
    间形成良好和封装在所述表面电磁检测中

    公开(公告)号：EP2483715A2

    公开(公告)日：2012-08-08

    申请号：EP10821075.8

    申请日：2010-09-27

    Applicant: Schlumberger Technology B.V. ,  PRAD Research and Development Limited ,  Services Pétroliers Schlumberger ,  Schlumberger Holdings Limited

    Inventor： ZHANG, Hong ,  ROSTHAL, Richard, A.

    IPC: G01V3/26 ,  G01V3/34 ,  E21B47/00 ,  G01R33/02

    CPC classification number: G01V3/30 ,  G01R33/0354 ,  G01R33/04

    Abstract: The present disclosure relates to systems and methods for conducting an electromagnetic borehole-to-surface survey of a formation surrounding a borehole. Such methods include deploying a dipole transmitter into the borehole to a depth of investigation, deploying an array of electromagnetic receivers outside of the wellbore, and measuring a response of the formation at the array of electromagnetic receivers deployed outside of the wellbore, for example at the surface. From the response of the formation a property of the formation can be determined based on the response of the formation measured at the array of electromagnetic receivers. For the scenario of a cased well, a local reference receiver may be added at a location proximate the borehole to measure the effective magnetic moment of the transmitter inside the casing, and normalize the formation response in order for a more accurate determination of a formation characteristic, such as resistivity. These receivers can also be used for other types of surveys.

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