Sep 24:
The Nandasan Redevelopment plan will push both crude and oil production higher in this field located in the Mehsana asset in Gujarat.
812 new oil producer wells and 3 new water injection wells are envisaged.
8Attendant production facilities are also coming up
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The Nandasan field is an old one, discovered in 1976, in the Mehsana asset. Output has been declining from this field, and ONGC has decided on a redevelopment plan that involves the drilling of 12 producer wells and 3 water injections wells. This will push peak output up to 700 m3/day of crude oil and around 0.29 mmscmd of gas. Current output is only around -.15 mmscmd of gas and 575 m3/day of crude.
The big investment in the redevelopment plan is to install fresh production faciliites. The Nandasan GGS is about 28 years old, and it does not have emulsion treatment and effluent treatment facilities, and the the liquid has to be transferred to the North Kali CTF for separation of the oil and the water, and then treat the water accordingly.
So what was planned was that liquid coming out of not just the Nandasan field but also from the Langhnaj EPS will be processed in a new surface production facilities in Nandasan itself. So what will be transported to North Kadi CTF will be treated oil, as against non-treated well fluids which were sent earlier from Nandasan.
In other words, the Nandasan GGS is now to be strengthened with well fluid treatment facilities not just to separate gas but also to separate oil, coming out of the Nandasan field but also fluids that are sent from the Langhnaj EPS. The faculties will involve a new GGS for joint processing of oil and gas, gas compression and dehydration units, effluent treatment plant and a water injection plant that will use produced water from the GGS
The surface facilities job was recently awarded to HAL Offshore Ltd at a cost of Rs 333 crore