Gastar drilled the Donelson #1 well, its sixth Deep Bossier well in the Hilltop area of East Texas, to a total depth of 19,200 feet. As previously announced, the Donelson #1 well has encountered an apparent commercial gas discovery in the Pettet formation at approximately 10,000 feet. In addition, the Donelson #1 well has encountered a productive interval within the Knowles limestone. The Knowles has been tested productive even after being damaged by heavy drilling fluids required to control the well during drilling. A dedicated Knowles well will be drilled on the Donelson #1 location in order to accelerate the development and production of the Knowles formation and to take advantage of current high natural gas prices.
The Donelson #1 well also encountered apparently productive sands in the upper and middle Bossier formations along with a series of apparently productive pay zones in the lower or deep Bossier formation from approximately 17,000 feet to 19,000 feet. Gastar estimates that, utilizing conservative porosity cut-off parameters, over 90 feet of net pay is present in the lower Bossier sands and an additional 53 feet of net pay was encountered in the upper and middle Bossier formations. The lower Bossier sands appear to correlate to a similar series of sands discovered by Gastar in the earlier Belin Trust A-1 well. Based on these latest results, Gastar believes that it has confirmed the presence of a series of gas bearing lower or deep Bossier formation sands that are productive due to their uplifted structural position in the Hilltop area and thus unique to Gastar's acreage position. Gastar will undertake a completion in the lower Bossier pays immediately after the dedicated Knowles well is drilled and completed on the Donelson #1 location. The Donelson Knowles well is expected to take approximately 45 days to drill and complete.
J. Russell Porter, Gastar's President & CEO, made the following comments on the announcement, "The discovery of a productive interval in the Knowles formation should allow Gastar to potentially ramp up production and cash flow through the drilling of two, and possibly three, offsets to this discovery. The cost of these wells is significantly less than the cost to drill and complete our Bossier wells and this additional cash flow will be available for our on-going Bossier drilling program. The confirmation of the presence of the lower Bossier sands in the Donelson #1 fault block supports our geologic model for the lower Bossier and sets up numerous additional drilling locations for these lower Bossier sands. We will also continue with exploration and development of the middle Bossier sands that have been discovered and produced in Gastar's previous F-K #1, Cheney #1, LOR #1 and Greer #1 wells and that are being successfully drilled by Burlington Resources in our immediate area."
"We continue to identify additional opportunities on our lease position and are currently testing the Travis Peak formation, after experiencing gas shows while drilling, to determine if commercial gas rates can be sustained from that formation. Gastar has executed a coring program within the Travis Peak formation that provided confirmation of a significant thickness of potential reservoir. If the Travis Peak tests are successful, Gastar believes that a large area could be developed for Travis Peak production. This would add a new dimension to our existing plans and enable Gastar to move forward with a multiple horizon drilling program."
Most Popular Articles