Schlumberger Technology Corporation

Westerngeco L.l.p.

David Edward Nichols

Benjamin Peter Jeffryes

Richard Timothy Coates

Iain Michael Cooper

John Mervyn Cook

Paul Simon Hammond

Paul Bolchover

Philip Christie

William Li-Tien Wang

A method of processing seismic data using a seismic energy propagation model of the subsurface is disclosed. The method assigns seismic source, seismic receiver, and reflection point locations to the propagation model; identifies a plurality of alternative raypaths consistent with the propagation model that originate at said seismic source location, reflect at said reflection point location, and terminate at said seismic receiver location; selects a raypath from the plurality of alternative raypaths having a shortest ray length, and utilizes the selected raypath in subsequent seismic processing.

Method of processing seismic data

The present invention provides methods and systems for making measurements associated with a rock formation including a main borehole, a microborehole extending from the main borehole into the rock formation, and one or more sensing devices positioned and arranged to make a measurement at measurement zones being located in the microborehole. A packer can also be installed in the microborehole dimensioned and arranged to hydraulically isolate the measurement zones from conditions present in other parts of the microborehole and/or main borehole. Methods and systems are also provided for taking fluid samples and injecting fluid tracers in a microborehole.

System and method for installation and use of devices in microboreholes

Growing community of inventors

Cambridge, United Kingdom

David Edward Nichols