North Sea oil and gas explorer Xcite Energy outlined its plans for its Bentley Phase 1A work program in a press statement Thursday.
Xcite said that the well, which was spud on March 18, 2012, with a 20-inch casing has now been set down to approximately 2,000 feet below the rotary table. Preparations are being made to set the blowout preventer and to continue the drilling of the 17.5-inch hole.
The company added that it has invested significant resources designing and engineering the next phases in the development of the Bentley field, and the Phase 1A and Phase 1B work programs.
The Bentley Phase 1A work program has two principal objectives:
- The 9/03b-7 and 7Z wells are planned to demonstrate the mechanical and operational aspects of the drilling, completion and flowing of the proposed well design for Phase 1B. The 9/03b-7Z well is planned to be used in Phase 1B as the first full production wellbore.
- To collect additional reservoir and production data to improve the calibration of the reservoir model, including data with respect to enhanced oil recovery techniques. This data with be used to further increase the certainty with respect to the longer term oil, gas and water production profiles and recoverable reserves from the Bentley field.
The Phase 1A work program on the Bentley field has been planned to achieve the two principal objectives set out above and comprises the following key operations:
- Drilling of a horizontal motherbore well in the geological formation immediately overlying the reservoir. This motherbore is planned to be approximately 2,000 feet in length.
- Drilling of the toe extension well (9/03b-7 well), being a horizontal wellbore from the toe of the motherbore, with a reservoir section of up to 2,400 feet in length. This well is planned to be positioned approximately at mid-height in the reservoir at an elevation above the oil-water contact such that, when produced at an oil rate of at least 1,500 barrels of oil per day (bopd), it should initiate water breakthrough at the well and subsequently develop sufficient water cut (to approximately 50 percent) within the flow test period. This well will be plugged and abandoned at the end of the production test.
- The 9/03b-7 wellbore is planned to recover a minimum cumulative volume of 45,000 barrels of oil during the flow test period to help ensure that the data gathering will be as effective as possible. This flow test is planned to be up to 90 days in length and to be conducted at a range of different flow rates (specifically not 500 barrels per day for 90 days), again to assist in the data gathering program. This flow test is expected to commence in the second quarter of 2012 and, for the sake of clarity, it is not a headline flow rate test, it is a data gathering exercise.
- Drilling of a lateral well (9/03b-7Z well) from the side of the motherbore, being a horizontal wellbore with a reservoir section of approximately 2,450 feet in length. This well is planned to be positioned as high in the reservoir as possible, being similar in design and completion to the successful 9/03b-6Z well. This wellbore will be drilled after the toe extension well, but not flowed until after the toe extension well has been flowed to achieve sufficient water cut. This lateral wellbore will be cleaned up and then flowed at a rate of at least 1,500 bopd for a minimum period of one day, prior to being suspended as the first full production well on the field in Phase 1B. This flow test is expected to be completed in the fourth quarter of 2012.
- Crude oil produced from the 9/03b-7 and 7Z wells will be marketed by BP Oil International, the company's marketing and offtake partner.
- The results and data gathered from the 9/03b-7 well will be used to calibrate the existing reservoir model and update the Reserves Assessment Report. This update is likely to take a number of weeks to finalize after the Phase 1A work program has been completed.
- In parallel to the update of the Reserves Assessment Report, the Field Development Plan for the Bentley field is expected to be updated for re-submission to the Department of Energy & Climate Change as soon as practicable.