The GRT has been operated commercially for three years by our customers in the US, Canada, and China. It was in field-testing for two years before this period. Most of the applications have been in geosteering horizontal wells in unconventional formations, but it is also used for conventional formation evaluation particularly in high-resistivity formations where wave-propagation tools are not accurate.
Here is a list of the oilfields (followed by the state/province) for each GRT job reported to us so far:
In the United States:
1) Bakken (SD), Niobrara (WY), Barracuda (CO), Barlow Ranch (WY), Wolfcamp (TX), Mississippi Limestone (KS), for unconventional oil.
2) Niobrara (CO) for shale-gas
3) San Juan Basin (CO), for Coal-Bed-Methane.
4) Tecumseh (OK), Campbell (WY), for conventional oil.
In Canada:
1) Garden Hill (NF), Montney (AB), Viking (SK), Bakken (SK), for shale-oil or shale-gas.
2) Lloydminster (AB), Wolf Lake (AB), for heavy-oil.
3) Carrot Creek (AB), Rock Creek (AB), Derwent (AB), Horizon (AB), West Hazel (SK), for conventional oil.
In China:
1) Tarim (Xinjiang) for deep carbonates oil/gas.
2) Changqing Sulige (Inner Mongolia) for tight gas sands
This list of 23 examples is incomplete because we do not always hear about every job run. CBG personel have been able to assist on a few of these jobs, and we always try to support our customers with advice (based on analysis of offset logs) about the suitablility of the GRT in any particular location. Call or email any questions you may have to Paul Sinclair.
