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Our highly skilled team of engineers and geoscientists that has been active in geothermal development for over 35 years. They are currently engaged in geothermal development projects worldwide as engineers, scientists, environmental managers, and on-site supervisors and operations consultants.
GRG’s team is led by senior GRG staff including Mr. Bill Rickard, GRG President and Chief Drilling Engineer, and Mr. Dennis Kaspereit, Reservoir Engineer. Each of these key personnel have demonstrated more than 35 years of experience in the geothermal industry, and extensive experience in Integrated Project Management, drilling, well testing and resource evaluation.
The GRG team is a global leader in the contracting and management of greenfield exploration and multi-well drilling programs. We had a proven successfully experience in handling IPM contract.
GRG provides onsite management and supervision of drilling, geosciences, and well testing operations. We also provide pre-drilling services, including reservoir assessment, geological prognosis, well design, drilling plans, drill rig and equipment selection, and contract tendering assistance.
William Rickard will be presenting paper entitled Step-Rate Formation Integrity Test Method for Geothermal Wells (William M. Rickard, Ozgur Balamir, and Ernesto Rivas) in the Drilling 3 Session on Tuesday, October 3, 2017 at 4:40 p.m.
“Obtaining fracture gradient data is a critical objective in oil, gas, and geothermal well drilling, from the well construction perspective. Fracture gradient data is important for properly executing many drilling phases and maintaining safe practices. Applying proper well design techniques ensures that a well can be shut in safely, mitigates underground well control issues Availability of fracture gradient data also results in significant improvements to the design and reduces the cost of future wells in the same field by allowing for the determination of the minimum number of casing strings required for safe drilling and completion. Thus, measuring the fracture gradient at relevant depths in a well is critical to reducing well cost, producing a safe well design and reducing the likelihood of downhole well control incidents. The step rate formation integrity test method is a safe and practical method of measuring the fracture gradient and leak-off pressure of a well while minimizing the risk of causing lost circulation.
The step-rate formation integrity test (sFIT) is a practical method of measuring the leak-off pressure of a well without the risk of inducing circulation losses. Leak-off pressure, as an indication of the fracture gradient, allows for the engineering assessment of the formation strength at the casing shoe. Otherwise, the leak-off pressure can only be estimated using empirical data. Not measuring the leak‑off pressure increases the likelihood of underground blowouts, some of which become above ground blowouts. The costs associated with well control can easily exceed the well drilling cost. Well control insurance is available, but is expensive. Ensuring that a well can be shut in safely through proper design should significantly decrease underground well control issues.”
Mary Mann will be presenting a paper entitled FORGE 2: Milford-Preliminary Testing and Evaluation of the Utah FORGE Reservoir: Results from Well MU-ESW-1 (Mann, M., Rickard, W., Balamir, O., McLennan, J. and Moore, J.) in the FORGE 2: Milford Session on Tuesday, October 3, 2017 at 4:00 p.m.
This presentation delivers highly anticipated results of the project. A scientific test well (MU-ESW-1) was drilled to a depth of 2,296 m (7,536 ft) to obtain direct measurements on rock type, temperature, permeability and stress within the Utah FORGE reservoir. MU-ESW-1 encountered the top of the granite at 655 m (2,150) ft and the top of the FORGE reservoir (175oC) at 1,980 m (6,500 ft). The well was cased with 7-inch casing to a depth of 2,248 m (7,377 ft). Core samples were collected near the top of the FORGE reservoir and at TD prior to running the casing in the hole. Injection testing and fall-off pressures provide data on the permeability of the crystalline rock; additional data were obtained permeability tests on the core samples. A Diagnostic Fracture Injection Test (DFIT) was conducted in the open hole section of the well. A complete suite of logs was obtained prior to casing the well.
Our company has provided consulting engineering and on-site management services in over 16 countries and at over 95 geothermal development projects worldwide. GRG is well suited for international services and we have the logistical capabilities to form partnerships for in-country business operations. In addition, as leaders in the geothermal industry, our engineering and geoscience staff regularly author peer-reviewed publications, and present case histories and research findings as speakers at geothermal industry conferences. GRG can provide drilling engineering and management services through on-site drilling experts and off-site engineering and geoscience specialists, with proven success internationally and locally.
Our industry leading network of drilling, geoscience, and reservoir engineering experts are widely recognized throughout the worldwide geothermal industry for providing consistent geothermal development expertise. GRG’s drilling supervision team is recognized as experienced, dedicated, and responsive to customer needs. We pride ourselves in the completion of production and injection wells that remain mechanically sound for the planned life of a geothermal power facility. Our domestic and international customers have realized substantial savings in well completion cost and quality by incorporating our world-class drilling engineering skills in their project development team.
Our Company Site Representatives generally have 15-20 years of direct field experience in geothermal drilling and site management. We have a large selection of personnel available for any geothermal project. GRG drilling supervisors are among the most experienced in the world. GRG supervisors have been trained to deal with the problems common to geothermal drilling, including loss of circulation, special cementing techniques, and geothermal well control. GRG select its supervisors with a keen sense of the need for the breadth of skills required to successfully drill all types of geothermal wells.