Velocity model errors are a major source of uncertainty in microseismic event location - A source of uncertainty that often goes unaddressed. This paper demonstrates how a commercial downhole sparker source can be used to produce crosswell tomography surveys that result in much improved velocity profiles. The combination of improved velocity model and more accurate event time picking deliver a much more constrained error distribution of micro seismic event location. This paper will outline a description of a repeatable and broadband downhole source, and the expected improvement to event location accuracy which is likely to be achieved, along with suggestions on how this may be applied to future monitoring surveys.
|Title of host publication||5th EAGE Passive Seismic Workshop: From Wish List to To-Do List|
|Publisher||EAGE Publishing BV|
|Publication status||Published - 2014|
|Event||5th EAGE Passive Seismic Workshop: From Wish List to To-Do List - Lisbon, United Kingdom|
Duration: 28 Sep 2014 → 1 Oct 2014
|Conference||5th EAGE Passive Seismic Workshop: From Wish List to To-Do List|
|Period||28/09/14 → 1/10/14|