Recently, Touchstone Exploration released their operational review in Trinidad which includes an update on several of the companies activities in T&T. According to the review, the company has indicated that the Royston-1 well will be spud in the 2nd week of June 2021, despite current COVID-19 restrictions.
Paul Baay, President and CEO, Touchstone said, “I remain confident that we will spud Royston-1 in June despite recent construction delays due to COVID-19 emergency health measures. The drilling of Royston-1 will complete the first phase of our exploration programme at Ortoire. The second phase is expected to include the Steelhead and Guabine prospects targeting the Herrera and Karamat Formations, as well as our Cretaceous prospect at Kraken. The phase two exploration programme is anticipated to be performed in parallel with development programmes at our confirmed Ortoire discoveries. Our future capital projects are anticipated to commence following the start of production from Coho and Cascadura, as these discoveries are expected to provide the funding for our future development and exploration programmes".
Touchstone is currently waiting on availability of the necessary soil stabilisation materials to complete construction of the Royston-1 access road and surface location. Access to these materials is dependent on their suppliers being able to comply with the current COVID-19 restrictions.
The company has stated that the drilling rig is in the final stages of pre-spud preparation and will be available to move immediately upon the completion of the access road. All drilling personnel are on the ground in Trinidad and have cleared the required quarantine protocols, the company added.
Independent of the drilling of Royston-1, Touchstone is currently in the process of acquiring 2D seismic data with 149 shot holes drilled to date out of a total of 370. Weather has been favorable thus far, and is targeting to shoot and record data commencing the second week of June 2021.
This data will provide information on possible development drilling at Royston, along with optimising the location for the future Kraken well to test the Cretaceous Formation.
With regard to the other Touchstone projects in T&T:
Coho
Touchstone indicated that the Coho facility construction at the Coho-1 well is nearly completed and they expect to commence testing in the next three to four weeks. The Company is currently awaiting final direction from the National Gas Company of Trinidad and Tobago regarding the preferred delivery point for Coho gas volumes. Once this has been provided, the Company will begin pipeline construction which is anticipated to take 60 days, subject to weather conditions.
Chinook
The company stated that the testing of the Herrera zones at Chinook-1 has been completed, and the Company will move up-hole to test the Lower Cruse Formation which indicated gas while drilling. The Cruse Formation appears to be aerially extensive with hydrocarbons having been observed and produced throughout the Ortoire block and the surrounding area. Gas shows were encountered at the nearby Cascadura project while drilling, and the Company looks forward to testing the commercial potential of these sands. In the Herrera zones, test three of the Chinook-1 well was put to pump and, after seven days, showed very limited to no new-fluid inflow with only load fluid and minimal oil being recovered. The well was shut-in for a buildup period at which time the well experienced a substantial surge of reservoir fluid and solids from the formation. This inflow appears to have encapsulated the downhole assembly in sand, and following several attempts, we believe the pump to be unretrievable. This zone will be abandoned as we now focus on the shallow Cruse completion. The Company has identified two additional locations significantly updip from the original Chinook well to evaluate the economics of the Chinook structure in the Herrera Formation. Given the limited inflow observed during testing and the skin damage reflected by the Cascadura Deep-1 testing, the Company is confident that the Herrera section of the Chinook-1 well was damaged while drilling. We are evaluating alternative drilling designs to limit possible reservoir damage in any future wells at Chinook.
Cascadura Deep-1 Testing
The pressure recorders were recovered from the Cascadura Deep-1 well on May 17, 2021, and provided 44 days of data that included initial completion pressure, isochronal flow and shutin buildup data. During the buildup period, the Company observed bottomhole pressures returning to pre-test levels, with a final shut-in pressure of approximately 4,746 psi (Cascadura- 1ST1 test one (lower): 4,762 psi, test two (upper): 4,715 psi). The buildup data suggested that the formation was damaged to some extent during drilling, with an estimated skin of between +4 and +7 (Cascadura-1ST1 test one (lower): +0.1, test two (upper): -1.1). Based on flowback observations, the Company believes that the well will continue to clean up once on production. No boundaries were observed during testing, with a radius of investigation of over 1,500 feet, confirming previous results observed at Cascadura-1ST1. Gas analysis at Cascadura Deep-1 displayed a methane content of 93.7 percent (Coho 98.6 percent, Cascadura-1ST1 test one (lower) 93.3 percent) while NGL analysis indicated 57 degree API condensate (Cascadura-1ST1: 53 degree API condensate). No hydrogen sulfide was observed in any samples, and no produced water was recorded during testing.
James Shipka, Chief Operating Officer, Touchstone said, “The data gathered from Cascadura Deep-1 reinforced our interpretation of the Cascadura structure and is extremely encouraging for the production potential of the well. This test completed 199 feet of a total of 1,007 feet of reservoir observed in the overthrust Herrera section, and there remains nearly 560 feet of high-quality sand above the existing zone in the Sheet Three section for future development. Given the nature of the Herrera sands, the existing completion should efficiently drain the gas and associated liquids trapped in Sheet Four. Flowback testing suggested that the formation had been damaged during drilling, and the buildup data quantified the magnitude of the damage. We believe that the well will clean up during production and that no stimulation is required at this time. We are now focused on bringing both Cascadura wells onto production as well as completing our comprehensive field development plan to efficiently exploit the potential of the Cascadura structure”.