Schlumberger Technology Corporation

Schlumberger Technology Center

Jose Navarro

Bhavani Raghuraman

Ian D Bryant

Min-Yi Chen

Michael G Supp

Terizhandur S Ramakrishnan

Kenneth Edward Stephenson

Lalitha Venkataramanan

In accordance with an embodiment of the present invention, a method of processing large volumes of data to allow for real-time reservoir management is disclosed, comprising: a) acquiring a first data series from a first reservoir sensor; b) establishing a set of criteria based on reservoir management objectives, sensor characteristics, sensor location, nature of the reservoir, and data storage optimization, etc.; c) identifying one or more subsets of the first data series meeting at least one of the criteria; and optionally d) generating one or more second data series based on at least one of the subsets. This methodology may be repeated for numerous reservoir sensors. This methodology allows for intelligent evaluation of sensor data by using carefully established criteria to intelligently select one or more subsets of data. In an alternative embodiment, sensor data from one or more sensors may be evaluated while processing data from a different sensor.

Processing and interpretation of real-time data from downhole and surface sensors

Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about a completed wellbore. The measured streaming potentials are generated by drilling with an overbearing pressure, slitting the mudcake in a borehole, acid injection, or any of various other manners which causes fluid movement. The data obtained is interpreted to locate fractures, measure formation permeability, estimate formation pressure, monitor drilling fluid loss, detect abnormal pressure, etc. Particularly, a streaming potential voltage transient having a double peak profile signifies the presence of a formation fracture.

Apparatus for measuring streaming potentials and determining earth formation characteristics

Completion apparatus for measuring streaming potentials and determining earth formation characteristics

Methods for locating formation fractures and monitoring well completion using streaming potential transients information

While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics

Wireline apparatus for measuring steaming potentials and determining earth formation characteristics

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Oslo, Norway

Jose Navarro