OGDCL has recently found additional oil & gas in the fifth well drilled in the Raijan Oilfield, resulting into the 100 percent increase in oil production from this old field discovered in 1993. Consequent to new 3D seismic interpretation, professionals from Exploration Prospect Generation and Reservoir Management Departments finalised the location of Raijan Structure to test the north-east ward extension of the structure and to enhance the oil production from the field.
Well was located at a distance of 1,700 meters in the northeast of Raijan well No 1. Raijan well No 5 was spudded on December 13, 2009 and was drilled down to 3,667 meters in Khewra Formation of Cambrian age in six months. After Logging, four potential reservoirs (Khewra, Jutana, Torbra and Sakesaer) were identified. Keeping in view the good reservoir quality of Khewra, well as directly completed in Khewra Formation, other three reservoirs are yet to be completed/evaluated.
After completion, well flowed 1,200 barrels of oil and 1.15 MMCFD of 1/2" choke size with Well Head Flowing Pressure of 500 Psi. The higher reservoir pressure and good production data revealed that this is an un-drained lobe having higher API of 28 degree.
With the addition of oil production from Raijan-5 the total field production has jumped to 2,400 barrels oil per day from 1200 barrels oil per day. The earlier estimates of recoverable reserves by D&M (Canada) in 2006 were to the tune of 8.104 million barrels oil.
Out of these OGDCL has already produced 7.35 million barrels of oil by June 30, 2010, which indicates that recoverable reserves are far more as compared to earlier calculated reserves. The results of Raijan-5 will definitely upgrade the estimated reserves and producing life of the Raijan Field.-PR
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