The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Feb. 24, 2011
Lijian Tan, Sugar Land, TX (US);
John E. Anderson, Houston, TX (US);
Lijian Tan, Sugar Land, TX (US);
John E. Anderson, Houston, TX (US);
ExxonMobile Upstream Research Company, Houston, TX (US);
Abstract
Method and system for more efficient checkpointing strategy in cross correlating () a forward () and backward () propagated wave such as in migrating () or inverting seismic data. The checkpointing strategy includes storing in memory forward simulation data at a checkpointed time step, wherein the stored data are sufficient to do a cross correlation at that time step but not to restart the forward simulation. At other checkpoints, a greater amount of data sufficient to restart the simulation may be stored in memory (). Methods are disclosed for finding an optimal combination, i.e. one that minimizes computation time (), of the two types of checkpoints for a given amount of computer memory (), and for locating a checkpoint at an optimal time step (). The optimal checkpointing strategy () also may optimize () on use of fast () vs. slow () storage.