Mark T Willis

US Patent:

48872440, Dec 12, 1989

Filed:

Jun 28, 1988

Appl. No.:

7/212470

Inventors:

Mark E. Willis - Carrollton TX
Rambabu P. Ranganayaki - Farmers Branch TX
Thomas E. Shirley - Richardson TX
Stan Y. C. Lee - Richardson TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 130

US Classification:

367 73

Abstract:

Method of interpolating additional seismic traces between existing seismic traces obtained during the exploration of a subsurface formation. Seismic traces are recorded upon a datum surface in accordance with standard seismic data acquistion methods. Forward and backward wave equation datuming of the data set at the same velocity estimates new measurements for originally acquired data deemed unsatisfactory by propagating measured seismic traces to a fictitious datum plane using wave theory to create a second set of seismic traces and datuming the second set of seismic traces, again using wave theory, back to the original datum plane to create a third set of seismic traces. The third set of seismic traces will include new seismic traces to be used in place of the originally acquired unsatisfactory data.

US Patent:

46835563, Jul 28, 1987

Filed:

Feb 27, 1985

Appl. No.:

6/706531

Inventors:

Mark E. Willis - Carrollton TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 100

US Classification:

367 27

Abstract:

A well logging tool employing at least one transmitter and at least one receiver is incrementally advanced through a borehole. A plurality of recorded well log traces from successive ones of the incremental depth points for a single transmitter-receiver pair are correlated to identify a moveout trend for the recorded waveforms about the measured arrival time of the waveform on the center trace of such plurality of traces. A second correlation of the center trace of the plurality of traces with the next successive depth trace is carried out in accordance with the identified moveout trend to determine the arrival time of the acoustic waveform on such next successive depth trace with respect to the measured arrival time of the center trace.

US Patent:

46835571, Jul 28, 1987

Filed:

Oct 5, 1984

Appl. No.:

6/657906

Inventors:

Mark E. Willis - Carrollton TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 140

US Classification:

367 57

Abstract:

A borehole logging tool includes at least one acoustic energy transmitter and at least one spaced apart acoustic energy receiver. Acoustic energy signals travel from the transmitter to the receiver directly through the subsurface formation adjacent the borehole and indirectly through reflections from subsurface formation changes below the bottom of the borehole. The difference in travel times of the directly arriving and indirectly arriving signals are determined for like acoustic waveforms as a measure of the depth of the subsurface reflecting formations below the borehole.