Methods for locating formation fractures and monitoring well...

Details Methods for locating formation fractures and monitoring well... Methods for locating formation fractures and monitoring well...

2007-07-17

2007-07-17

Neuder, William (Department: 3672)

Wells

Processes

With indicating, testing, measuring or locating

C166S066000, C324S324000

Reexamination Certificate

active

10872112

ABSTRACT:
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.

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