公开(公告)号：EP2912492A1

公开(公告)日：2015-09-02

申请号：EP13731220.3

申请日：2013-06-12

申请人： Chevron U.S.A. Inc.

发明人： HAGER, Christian ,  MUHURI, Sankar Kumar ,  LANDIS, Paul Shelton

IPC分类号： G01V1/30

CPC分类号： G06T17/00 ,  G01V1/301 ,  G01V2210/66

摘要： A method for quantitatively ranking a plurality of prospects in a subsurface region, includes generating a subsurface digital elevatiomodel of each prospect and identifying a region of subsurface imaging uncertainty within the model. The method further includes generating, for the region of imaging uncertainty, multiple realizations of the model, and determining geometrical and physical characteristics of the prospect for each realization. The characteristics, chosen to be related to a likelihood that the prospect is lower risk, are summed and the prospects are ranked in accordance therewith.

公开(公告)号：EP2776869A1

公开(公告)日：2014-09-17

申请号：EP12847699.1

申请日：2012-10-16

申请人： Chevron U.S.A. Inc.

发明人： HRU KA, Marina ,  KATZ, David

IPC分类号： G01V3/18 ,  G01V3/38 ,  G06F19/00

CPC分类号： G01V1/301 ,  E21B49/00 ,  G01V1/28 ,  G01V1/306 ,  G01V1/32

摘要： A method for analyzing characteristics of a geological formation includes obtaining at a processor data representative of at least one of stratigraphic, structural, or physical characteristics of the geological formation, applying at the processor a wavelet transform to at least a portion of the obtained data or data interpreted or derived from the obtained data to derive one or more wavelet transform coefficients representative of the obtained data, segmenting at the processor at least one or more of the obtained data or data interpreted or derived from the obtained data into segments, determining at the processor a measure of variability of the obtained data or the data interpreted or derived from the obtained data over each segment at one or more scales of the wavelet transform, wherein the measure of variability is based at least on the wavelet transform coefficients corresponding to each segment, and analyzing at the processor each segment based on the determined measure of variability to produce a stratigraphic, structural, or physical classification of the geological formation.

公开(公告)号：EP1949280A4

公开(公告)日：2014-07-30

申请号：EP06809774

申请日：2006-10-19

申请人： PARADIGM GEOPHYSICAL LTD

发明人： JAMES HUW

IPC分类号： G01V1/28 ,  G01V1/34 ,  G01V1/36

CPC分类号： G01V1/24 ,  G01V1/301 ,  G01V1/345 ,  G01V2210/64

摘要： A system and method may, based on a 3D seismic data set seed point, execute a seed picking algorithm, using the first point for picking a set of second points from the data set, setting each of the points in the set of second points as the first point and repeating the algorithm. An iteration number or other attribute may be assigned to the points, the iteration number corresponding to the number of times the algorithm repeated to process the point. The attribute or a number of attributes may be displayed as a visual characteristic for each point. An iterative process may be applied to a set of seismic data points, starting at a seed data point and finding a set of next iteration seed points from among the set of points neighboring the seed point, continuing only with next iteration seed points, and recording for each of a set of data points the number of points that are found by the process when the point is used as a seed data point. Attributes may include, for example, the total number of descendants of a seed point, the direction, for example, the azimuth, of propagation of the horizon picking process, or information that relates to the order in which points are picked such as an iteration number.

摘要翻译： 系统和方法可以基于3D地震数据集种子点执行种子拾取算法，使用第一点从数据集中挑选一组第二点，将第二点集合中的每个点设置为 第一点并重复算法。 迭代次数或其他属性可以分配给点，迭代次数对应于算法重复处理该点的次数。 可以将属性或多个属性显示为每个点的视觉特征。 迭代过程可以应用于一组地震数据点，从种子数据点开始，并从邻近种子点的点集合中找到一组下一个迭代种子点，仅连续下一个迭代种子点，并且记录 对于一组数据点中的每一个，当点用作种子数据点时，由进程找到的点数。 属性可以包括例如种子点的总后数，方向，例如水平线拾取过程的传播的方位，或与拾取点的顺序相关的信息，例如迭代 数。

公开(公告)号：EP2678716A1

公开(公告)日：2014-01-01

申请号：EP12749070.4

申请日：2012-02-23

申请人： Landmark Graphics Corporation

发明人： XIA, Fan ,  REN, Yiqing ,  JIN, Shengwen

IPC分类号： G01V1/30

CPC分类号： G01V1/282 ,  G01V1/301 ,  G01V1/303 ,  G01V11/00 ,  G01V2210/47 ,  G01V2210/51 ,  G01V2210/6222 ,  G01V2210/626 ,  G01V2210/64

摘要： Seismic imaging systems and methods that employ sensitivity kernel-based migration velocity analysis in 3D anisotropic media may demonstrate increased stability and accuracy. Survey data analysts employing the disclosed systems and methods are expected to provide better images of the subsurface and be better able to identify reservoirs and deposits for commercial exploitation. Certain embodiments migrate seismic survey data with an anisotropic velocity model to obtain common angle image gathers. These gathers are processed to obtain depth residuals along one or more horizons. Angle-domain sensitivity kernels are used to convert the depth residuals into velocity errors, which are then used to refine the velocity model. A user is then able to view a representation of the subsurface structure determined in part from the refined velocity model. Multiple iterations may be needed for the velocity model to converge. The velocity model may be a layered to have constant velocity values between formation boundaries.

公开(公告)号：EP2668642A1

公开(公告)日：2013-12-04

申请号：EP11857361.7

申请日：2011-01-27

申请人： Landmark Graphics Corporation

发明人： YARUS, Jeffrey M. ,  MAUCEC, Marko ,  CHAMBERS, Richard L.

IPC分类号： G06T17/05 ,  G01V1/00

CPC分类号： G06F17/5009 ,  G01V1/301 ,  G01V2210/614 ,  G01V2210/66 ,  G06T17/05

摘要： Models of underground formations. At least some of the illustrative embodiments are methods including creating a model of an underground formation. The creating may include: calculating a set of probabilities associated with a first horizontal location, each probability indicative of a likelihood of finding abutting geological layers; estimating a plurality of successions of geological layers to create a plurality of estimated successions, and the estimating using the set of probabilities; determining, for each of the estimated succession, a value indicative of how closely each estimated succession matches a measured succession, the measured succession determined by a seismic survey; and selecting from the plurality of estimated successions based on the values, the selecting creates a selected succession of geological layers, and the plurality of modeled values associated with the first horizontal location determined based on the selected succession of geological layers.

摘要翻译： 地下建筑模型。 示例性实施例中的至少一些是包括创建地下地层的模型的方法。 创建可以包括：计算与第一水平位置相关联的概率集合，每个概率指示找到邻接地质层的可能性; 估计多个连续的地质层以创建多个估计的继承，并且使用该组概率进行估计; 为每个估计的继承确定一个值，表示每个估计的连续性与测量的连续性相匹配，由地震测量确定的测量的连续性; 并且基于所述值从所述多个估计的继承中进行选择，所述选择创建所选择的一系列地质层，以及与基于所选择的连续的地质层确定的与所述第一水平位置相关联的所述多个建模值。

公开(公告)号：EP2577353A1

公开(公告)日：2013-04-10

申请号：EP11790142.1

申请日：2011-04-22

申请人： ExxonMobil Upstream Research Company

发明人： WINBOW, Graham, A. ,  DICKENS, Thomas, A.

IPC分类号： G01V1/00

CPC分类号： G01V1/282 ,  G01V1/301 ,  G01V1/303 ,  G01V2210/512 ,  G01V2210/614 ,  G01V2210/6222 ,  G01V2210/632 ,  G01V2210/679

摘要： Method for efficient computation of wave equation migration angle gathers by using multiple imaging conditions. Common reflection angle or common azimuth gathers or gathers including both common reflection angles and common azimuth angles are produced as the data are migrated. In the course of either wave equation migration or reverse time migration, the pressures and particle motion velocities that need to be computed are sufficient to also compute the Poynting vector pointing in the direction of source-side (35) or receiver-side (37) wavefield propagation. From that, the reflection and azimuth angles can be computed (38). The seismic images can then be stored in the appropriate angle bins, from which common reflection angle or azimuth data volumes can be assembled (39).

公开(公告)号：EP2502095A2

公开(公告)日：2012-09-26

申请号：EP10838773.9

申请日：2010-12-21

申请人： Schlumberger Technology B.V. ,  Schlumberger Holdings Limited ,  Services Pétroliers Schlumberger ,  Prad Research And Development Limited

发明人： WILLIAMS, Michael, John ,  KHADHRAOUI, Bassem

IPC分类号： G01V1/50 ,  G01V1/30 ,  G01V1/40

CPC分类号： G01V1/301 ,  G01V1/288 ,  G01V1/42 ,  G01V1/50 ,  G01V2210/1234 ,  G01V2210/646 ,  G01V2210/65

摘要： A method for characterizing fracture planes generated during a hydraulic fracturing process, comprises receiving microseismic data from the hydraulic fracturing process and processing a microseismic event cloud from the received microseismic data. This is followed by determining at least one reservoir geometry from the microseismic event cloud. The determination of geometry may consist of determining multiple candidate geometries and probability of each. In some forms of the invention the method may comprise postulating a set of candidate geometries with differing numbers of fracture planes, determining the most probable locations of the postulated fracture planes in each member of the set of candidate geometries and also determining relative probabilities of the candidate geometries in the postulated set. Determining a location of a fracture plane may comprise calculating a number density for each microseismic event, dependent on distance from some possible location of a fracture plane or fracture network. Finding the location of a plane may then be finding the location for which the number density is greatest. The determination of reservoir geometry may be followed by determination of the area of the fracture planes and/or by a prediction of production.

公开(公告)号：EP2372399A1

公开(公告)日：2011-10-05

申请号：EP11159217.6

申请日：2011-03-22

申请人： PGS Geophysical AS

发明人： LeCocq, Paul ,  Reiser, Cyrille ,  Brittan, John

IPC分类号： G01V1/30

CPC分类号： G01V1/301

摘要： Fast anisotropy axis values are determined for each bin in seismic tinned by azimuth. A fast azimuth gather is determined within each bin in the seismic data from the fast anisotropy axis values. The earth's subsurface is imaged, using the fast azimuth gathers.

摘要翻译： 几乎各向异性轴的值是确定的开采在地震each'm由方位角镀锡。 甲近方位收集每个仓内的地震数据从几乎各向异性轴的值是确定的开采。 地球的地下成像，使用几乎方位云集。

公开(公告)号：EP2260331A1

公开(公告)日：2010-12-15

申请号：EP09723513.9

申请日：2009-01-26

申请人： Exxonmobil Upstream Research Company

发明人： KREBS, Jerome, R. ,  HINKLEY, David, L.

IPC分类号： G01V3/18

CPC分类号： G01V1/301 ,  G01V1/282 ,  G01V2210/50

摘要： A method for efficient inversion of measured geophysical data from a subsurface region to prospect for hydrocarbons. Gathers of measured data (40) are encoded (60) using a set of non-equivalent encoding functions (30). Then all data records in each encoded gather that correspond to a single receiver are summed (60), repeating for each receiver to generate a simultaneous encoded gather (80). The method employs iterative, local optimization of a cost function to invert the encoded gathers of simultaneous source data. An adjoint method is used to calculate the gradients of the cost function needed for the local optimization process (100). The inverted data yields a physical properties model (110) of the subsurface region that, after iterative updating, can indicate presence of accumulations of hydrocarbons.

公开(公告)号：EP2250520A2

公开(公告)日：2010-11-17

申请号：EP09710034.1

申请日：2009-02-06

申请人： Chevron U.S.A., Inc.

发明人： LOMASK, Jesse ,  RICKETT, James ,  CLARK, Julian

IPC分类号： G01V1/28

CPC分类号： G01V1/301

摘要： A method of determining a horizon volume. In one embodiment, the horizon volume is determined from obtained seismic information, and maps the obtained seismic information onto a flattened volume such that in the flattened volume, horizons represented in the obtained seismic information are shifted to be substantially coplanar with a surface defined by the horizon volume as an estimate of a single chronostratigraphic time such that the parameters of the flattened volume include (i) a two-dimensional position in a surface plane, and (ii) a metric related to chronostratigraphic time.