On the Manavi M12 appraisal well the 13 3/8" casing has been successfully run at 6,272 feet (1,912 metres) in the Middle Sarmatian. The next section of the hole will be drilled using oil-based mud and other techniques which should achieve faster drilling. The well is targeting the Cretaceous reservoir at a prognosed depth of 14,272 feet (4,350 metres), and it is anticipated that the well will reach total depth in mid-summer, after which testing is planned.
The M12 well is an appraisal of the Manavi M11 oil discovery which flowed oil from the Cretaceous reservoir interval in what is mapped as a large prospect and which could be a substantial new oilfield.
MK72 Exploration Well
In the case of the Norio MK72 well, testing operations on the Oligocene sand interval are continuing. A total of 322 feet (98 metres) of net sands were perforated over the interval 12,096 feet (3,687 metres) to 13,622 feet (4,152 metres). Although the well is showing signs of clean-up, with continual limited flow being obtained on a very small choke and with light 48.6ï¿1/2API oil and gas flowing intermittently to surface, further clean up is required. This is being attempted by means of shutting the well in to obtain a maximum pressure build up (typically in the region of 4,040 psi (275 ATM)) and then opening the well on full choke so as to bleed down the pressure as quickly as possible thereby creating a maximum drawdown on the formation and so perform an "aggressive" clean-up. It is hoped that this will clean out the heavy mud which we believe was lost to the formation whilst drilling. It is likely that the thinner, somewhat tighter sands are currently producing the flow, whilst the thicker, apparently better quality sands (which appear more invaded on the logs) remain blocked. It may be necessary to apply this technique a number of times over the coming weeks to achieve better communication with the reservoir. Other options to increase production from the thicker sand zones are also being considered. The MK72 well also encountered oil and gas in the deeper Middle Eocene primary target zone which unfortunately could not be tested due to operational constraints; however this is mapped as a large prospect in a reservoir which is reported to have demonstrated flow potential in excess of 10,000 barrels per day in the Norio area.
N97H Horizontal Well
A forward plan has been drawn up for the N97H horizontal sidetrack well on the Ninotsminda Field. The well when tested produced at a maximum flow rate of 1,145 barrels of fluid per day with a maximum oil rate of 385 barrels of oil per day (bopd), while at the same time, a pressure increase was observed in the N4H well which is located to the west of N97H. In addition to the pressure increase in N4, oil production increased from 40 bopd to over 200 bopd. The current view is that the end of the N97H well has penetrated a water zone or fracture set common to both the N97H and N4H wells with the zone being more productive in the N97H well. The current plan is to inject a water shutoff chemical using coiled tubing into the last approximately 492 feet (150 metres) of the well furthest from the original vertical well in an attempt to isolate the water producing fractures. It is expected that this operation will be carried out by the end of May 2006. Should this prove successful, there are a number of other candidate wells, both horizontal and vertical, which are producing with a high water cut which might benefit from being treated with a similar process. Whilst this process is new to Georgia, it is used extensively in the international oil and gas industry.
Operations continue in Kazakhstan through the company's wholly owned subsidiary, Tethys Petroleum Investments Limited ("TPI"), operating through its Kazakh subsidiary BN Munai LLP ("BNM").
Work is proceeding on the Kyzyloi Gas Field development program. The initial development will involve production from six already tested gas wells on the Kyzyloi Field, with the recent exploration discoveries then being tied-in to the development. The initial development will consist of a 32 mile (51 km) export pipeline from the Kyzyloi gathering station to the main Bukhara-Urals gas trunkline, where a compressor station will be constructed, with a tie-in point agreed with the trunkline's owners, the State company Intergas Central Asia. A topographic survey has been carried out along the pipeline route, and the Land Allotment was agreed last week with the regional administration in Aktobe. Contracts for the engineering project have now been awarded and, subject to finalising delivery dates for the compressors (for which there is currently very high demand), first gas is expected in autumn of this year with an initial planned rate of approximately 20-22 million cubic feet (566,000-625,000 cubic metres) of gas per day.
The initial phase of the shallow exploration program on the Akkulka area surrounding Kyzyloi is now almost complete with the AKK01 well having reached total depth. Wireline logs indicate the presence of gas bearing sands, and casing is currently being run. AKK01 will be tested as part of an integrated testing program with the AKK02 and AKK03 wells when appropriate testing equipment is available in the area. The other two exploration wells, AKK05 (North East Kyzyloi) and AKK04 (East Akkulka), have both already been tested at rates in excess of 8 million cubic feet of gas per day (approximately 280,000 cubic metres per day) and will be tied into the Kyzyloi Gas Field development.
TPI has further exploration and development plans for the Akkulka and Greater Akkulka areas, including further shallow gas exploration, tie-in of new discoveries and exploration for potential in the deeper Jurassic and Triassic prospects identified on recent seismic re-interpretation. Given this forward program, CanArgo is looking at alternative ways to finance the activities of TPI which will minimise dilution for CanArgo's shareholders and which will provide the necessary capital for growth. One possible option which is being considered to bring in additional capital to TPI is to list TPI as a separate pubic company in which CanArgo would retain a significant stake.
CanArgo is an independent oil and gas exploration and production company with its oil and gas operations currently located in the Republic of Georgia and in Kazakhstan.
Most Popular Articles