HR: 09:15h
AN: G41A-06 INVITED [PDF]
TI: Imaging and Analysis of Ground Surface Deformation using Tiltmeters for Reservoir
Optimization
AU: Davis, E
EM: eric.davis@pinntech.com
AF: Pinnacle Technologies, 600 Townsend St. Suite 160W, San Francisco, CA 94103
AU: * Wright, C
EM: chris.wright@pinntech.com
AF: Pinnacle Technologies, 600 Townsend St. Suite 160W, San Francisco, CA 94103
AU: Jing, D
EM: jing.du@pinntech.com
AF: Pinnacle Technologies, 600 Townsend St. Suite 160W, San Francisco, CA 94103
AU: Roadarmel, W
EM: william.roadarmel@pinntech.com
AF: Pinnacle Technologies, 600 Townsend St. Suite 160W, San Francisco, CA 94103
AU: Astakhov, D
EM: dmitriy.astakhov@pinntech.com
AF: Pinnacle Technologies, 600 Townsend St. Suite 160W, San Francisco, CA 94103
AU: Griffin, L
EM: larry.griffin@pinntech.com
AF: Pinnacle Technologies, 600 Townsend St. Suite 160W, San Francisco, CA 94103
AB:
Simultaneous injection into multiple wellbores inevitably raises questions about fluid distribution. One way to monitor both
the injection and subsequent fluid withdrawal is with an array of surface tiltmeters. The tiltmeter data is used to produce
a video of surface deformation, which enables quick visual assessment of the stimulated areas. The data is further analyzed
when discreet events are noted. Some of these events include opening of new areas which previously received little fluid,
changes in distribution caused by shut-ins and injection pressure changes, and breakthroughs into shallower zones. The
geophysical inverse problem is solved using a combined volumetric and dislocation solution to quantitatively estimate the
dimensions, depth, volume content and shear offset of an affected zone.
The data generated by the monitoring system is used in the short term to alter injection strategies to aid production while
preventing significant breakthrough into unwanted zones and in the long term to help optimize the field treatment strategy.
DE: 1242 Seismic deformations (7205)
DE: 1247 Terrestrial reference systems
DE: 1249 Tides--Earth
DE: 1294 Instruments and techniques
SC: Geodesy [G]
MN: 2003 Fall Meeting