Various horizontal technologies used to develop shallow gas sands in the Eugene Island area
Conference
·
OSTI ID:457345
- and others
In early 1996, Vastar Resources completed a three-well project in the Eugene Island area. These wells were drilled using various horizontal technologies to develop three thin (10-22 ft) shallow gas sands. (Target TVD for one well was only 1,060 ft.) One was an {open_quotes}extended reach{close_quotes} well with a vertical section of 7,450 ft. Economics of the project were optimized by {open_quotes}batch drilling{close_quotes}, that is, drilling to target depth on all wells prior to any horizontal drilling. Accurate geosteering was accomplished using near-bit MWD sensors integrated with a directional drilling motor. Before drilling, MWD resistivity models were created; these models were compared with real-time data to help identify proximity to the edges of the targets during horizontal drilling. To minimize risk, the wells were drilled to targets defined by offset well control, pilot holes, and seismic amplitude anomalies.
- OSTI ID:
- 457345
- Report Number(s):
- CONF-961003--
- Country of Publication:
- United States
- Language:
- English
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