Peter Angus Van Wootten
Electrician at Indigo Is Ln, Houston, TX

6757614, Jun 29, 2004

Dec 14, 2001

10/017565

Randolph E. F. Pepper - Sugar Land TX
Peter P. Van Bemmel - Houston TX

Schlumberger Technology Corporation - Houston TX

G01V 100

702 14, 367 73

A seismic signal processing method will analyze a resultant set of seismic data, generated in response to a seismic operation performed on a particular portion of an Earth formation, for the purpose of determining a set of geologic characteristics of the particular portion of the Earth formation. When the seismic signal processing method is performed, a cross correlation technique is utilized. In particular, a first data set, which represents a standard set of ‘comparison traces having known geologic characteristics’ and includes two or more traces having known geologic characteristics but does not constitute a part of an input seismic volume, is cross correlated with a second data set having unknown geologic characteristics. As a result of that cross correlation, an output record, known as a ‘correlation spectral volume’, is generated. The ‘correlation spectral volume’ records and displays the degree to which the unknown geologic characteristics of the second data set substantially matches one or more of the known geologic characteristics of the first data set.

6151555, Nov 21, 2000

Aug 19, 1999

9/377573

Peter P. Van Bemmel - Houston TX
Randolph E. F. Pepper - Sugar Land TX

Schlumberger Technology Corporation - Houston TX

G01V 128

702 14

A workstation computer system, and its associated method and program storage device, stores a novel software package known as "Variance Cube". The computer system is responsive to a plurality of seismic signals propagating through a cubic volume of an earth formation for generating a cube, representing said cubic volume of earth, where the cube includes a plurality of seismic data samples and where each seismic data sample has a corresponding "variance value" assigned thereto. The computer system also generates one or more maps, such as a time slice map, representing one or more slices through the cube. Each map displays and is used to determine certain geologic features which exist along the corresponding slice through the cube, each map including a plurality of the variance values representing the geologic features, each such variance value being defined as the degree to which an amplitude of each seismic data sample in the cube at a particular reflection time "t" varies about an average amplitude. When the Variance Cube software is executed, the method of this invention determines the plurality of variance values by: dividing the cube into a plurality of slices, dividing each slice into a plurality of cells, calculating an average of the amplitudes of a plurality of seismic data samples in each cell on the slice, subtracting that average from each amplitude of each seismic data sample in each cell thereby producing a plurality of differences, summing the squares of the plurality of differences thereby producing a numerator, summing the squares of the plurality of amplitudes of the plurality of seismic data samples in each cell thereby producing a denominator, dividing the numerator by the denominator to thereby produce an approximate variance value which is assigned to a center seismic data sample in each cell on the time slice.

5995907, Nov 30, 1999

Feb 5, 1998

9/019180

Peter P. Van Bemmel - Houston TX
Randolph E. F. Pepper - Sugar Land TX

GeoQuest - Houston TX

G06F 1900

702 16

A method and associated apparatus for generating time slice maps and/or horizon maps, representative of a time slice or a horizon in an earth formation that is subject to a seismic operation, in response to received seismic data includes the steps of: (a) cross correlating a plurality of seismic traces from the seismic data and a corresponding plurality of quadrature traces associated, respectively, with the plurality of seismic traces to obtain a corresponding plurality of cross correlation functions "Q(. tau. )", (b) obtaining a plurality of particular values from the plurality of cross correlation functions "Q(. tau. )", at least one particular value being obtained from each cross correlation function, and (c) assigning the plurality of particular values to a respective plurality of reflection points on a map, each particular value being assigned to a different one of the reflection points, thereby constructing the time slice map and/or the horizon map. The particular value could be either a quadrature correlation coefficient (QCC), or a time lag (TL), or a sum of a normalized quadrature correlation coefficient and a normalized time lag (QCC. sub. n +TL. sub. n).

5873051, Feb 16, 1999

Sep 20, 1996

8/717007

Peter P. Van Bemmel - Houston TX
Randolph E. F. Pepper - Sugar Land TX

GeoQuest, a division of Schlumberger Technology Corporation - Houston TX

G06F 1900

702 17

A processing system stores a special software known as the Cubemath software. The Cubemath software allows the processing system to process, analyze, and interpret a second set of seismic data relative to a first set of seismic data obtained from either a repeat seismic operation or a single seismic two processing method operation. A first set of 3D seismic data is collected at a particular location on the surface of the earth at time "t1", and a second set of 3D seismic data is collected at that same particular location on the surface of the earth (at a different time "t2" when the repeat seismic operation is being performed). The processing of the second set of seismic data relative to the first set of seismic data is accomplished by: selecting either a volume or a surface to represent the first set of seismic data, selecting either a volume or a surface or a trace or null to represent the second set of seismic data, selecting a specific mathematical operation, selecting a specific type of output (such as a volume output or a surface output), executing a run thereby performing the mathematical operation on the first set of seismic data and the second set of seismic data, and generating a set of data results on an output record medium presented to an operator in the form of the selected type of output.

5999885, Dec 7, 1999

Feb 6, 1997

8/796233

Peter P. Van Bemmel - Houston TX
Randolph E. F. Pepper - Sugar Land TX
William G. Dillon - Missouri City TX

GeoQuest - Houston TX

G01V 140

702 14

An interpretation workstation based apparatus having an "Auto Fault" software stored therein automatically identifies a plurality of fault cuts in each of a plurality of horizons in a seismic data volume in response to a plurality of predetermined "horizon time structures". When a processor in the workstation executes the "Auto Fault" software, the processor will receive the "horizon time structures" and perform the following steps: (a) identify valid gaps in each of the horizon time structures where each gap has a proper length and a proper slope, (b) locate midpoints in each of the valid gaps, (c) draw fault cuts at each of the midpoints of each of the valid gaps in the horizon time structure where the drawn fault cut has an inclination angle equal to a predefined and user input inclination angle for single horizon analysis, and an angle determined by association for multiple horizon analysis, and (d) extend the upper and the lower part of the horizon of the horizon time structure to the newly drawn fault cuts until a pair of fault contacts on the fault cuts are determined whereby each of the plurality of fault cuts in each of the plurality of horizons in the seismic data are automatically and rapidly determined.

6201884, Mar 13, 2001

May 25, 1999

9/318393

Peter P. Van Bemmel - Houston TX
Randolph E. F. Pepper - Sugar Land TX

Schlumberger Technology Corporation - Houston TX

G06K 900

382109

A method and apparatus are disclosed for testing a large plurality of displayed data points of recorded spatial data to determine and display trends created by different sets of the data points within the recorded spatial data. An analysis operator interactively uses an onscreen graphic tool called a widget to set trend search parameters after studying the displayed data points, and uses a pop-up menu to set other search and display parameters for the trend search. The onscreen graphic tool permits the user to easily see on-screen, and manually set, search parameters indicating the direction of a search from a user selected starting point, how far each step of a search will be performed for adjacent data points in a fault line, within what angle the search will be performed on either side of the user indicated search direction, and if trend searches being performed are in one or both directions from the user selected starting point in the recorded spatial data.

5300218, Apr 5, 1994

Jun 23, 1992

7/902604

Leonard B. Graiff - Houston TX
Peter B. Van Benthuysen - Houston TX
Danny Y. Ngan - Houston TX
Zaida Diaz - Houston TX
David M. Austgen - Missouri City TX

Shell Oil Company - Houston TX

C10G 2500

208299

This invention is a method for reducing the particulate emissions tendency of diesel fuel. Also the piston ring sticking, and deposit formation tendency of diesel fuel on the injector and combustion chamber of an internal combustion diesel fuel are reduced. The diesel fuel under the method of this invention is fed to at least one adsorbent bed in which the diesel fuel is contacted with one or more adsorbents under suitable process conditions such that there is a reduction in content of impurities in the fuel which cause the particulate emission causing tendency, piston ring sticking, and deposit formation tendency of the diesel fuel on the injector and/or combustion chamber.

6012017, Jan 4, 2000

Aug 27, 1997

8/918909

Peter P. Van Bemmel - Houston TX
Randolph E. F. Pepper - Sugar Land TX
Horacio R. Bouzas - Missouri City TX

GeoQuest, a division of Schlumberger Technology Corporation - Houston TX

G01V 128

702 14

Formation tops correlation is interpreted between sampled log curves by a weighted combination of covariance, the ratio of standard deviation, and the ratio of summed amplitude. This covariance function is computed and evaluated appropriately for the geologic environment over a sliding analysis window. Correlations are determined for any number of wells and any number of events in each well. Geologic rules are used to establish a parameter for the algorithm operation and for the analysis of the resulting function. The geologic rules include bounding guide horizons, sequence rules, and a covariance cutoff parameter. Bounding horizons are picked from pre-existing seismic or geologic interpretations and from map grids. The rule set includes onlap, truncated, conformable, and unstructured sequence definitions. Additional geologic complexity such as crossover, repeat sections, and inverted sections are accommodated by the rule set.

4339810, Jul 13, 1982

May 13, 1980

6/149438

James F. Nichols - Missouri City TX
Peter P. Van Bemmel - Houston TX

G01V 137

367 49

In one exemplar embodiment, an improved method is provided for compensating received propagated seismic signals for the absorption by the earth of all frequencies of a vibrator source signal. The received seismic data is crosscorrelated with the original source signal and a Fourier amplitude spectral analysis obtained. Then an attenuation function is determined by the attenuation exhibited by the spectrum. The quantified attenuation function is then applied as a compensation function to the original source signal to obtain a "weighted" vibrator sweep signal that is then used in crosscorrelating with the received seismic data to compensate for the frequency dependent attenuation in the earth of received propagated seismic data.

6016287, Jan 18, 2000

Aug 19, 1998

9/136599

Eric F. Klebba - Pearland TX
Peter P. Van Bemmel - Houston TX

GeoQuest, a division of Schlumberger Technology Corporation - Houston TX

G01V 130

367 72

An operator sitting at a workstation views, on a display, a multitude of seismic traces having one or more horizons indicated therein by a plurality of sets of events (such as peaks or troughs or zero crossings) on the seismic traces. The operator uses a mouse to draw a line from left to right across a plurality of seismic traces being displayed on the workstation display screen. At this point, the line does not lie on the events (such as the peaks) of the seismic traces. Therefore, the line does not yet represent a horizon in an earth formation. The operator presses a key on the keyboard of the workstation. In response to the pressing of this key, the workstation processor executes a "snapper software" in accordance with the present invention. When the snapper software of the present invention is executed, the line, previously drawn by the operator across the seismic traces on the workstation display screen, moves from one location, not corresponding to the events (such as the peaks) of the seismic traces, to another location, corresponding to the events (such as the peaks) of the seismic traces. When the line moves to said another location on the screen display, the line now lies directly on a set of events (such as peaks) of the seismic traces which underlie the line.