:: Technical --- ID :: 14658
ONGC to install system to detect oil leak/theft
ONGC to install system to detect oil leak/theft

ONGC to install system to detect oil leak/theft

Oil and Natural Gas Corporation (ONGC), the country's largest energy explorer, which loses significant quantity of crude oil through theft/leak from its pipeline along the Uran-Trombay belt is in the process of installing a detection system which will give real time alerts about it. The new system is also expected to take care of the false alarm about leakage which unnecessarily sends the system into a tizzy.

As per the company documents, Uran plant receives oil from Mumbai offshore fields. The crude oil is then dispatched through the pipeline to Mumbai and coastal refineries. The 36” x 24 km size crude oil pipeline lies between Uran plant and Trombay terminal. From Trombay terminal, the 36” crude oil line is diverted to Jawahar Dweep, and oil is further transported in tanker to coastal refineries, which include BPCL and HPCL refineries.

According to the company officials, the standard flow rates of the main pipeline are between 2,000 and 4,500 m3/hour. The detection system shall be specifically developed to produce minimal false alarms, with detection time less than five minutes and accuracy of 50 metres (plus/minus). According to experts, leaks can be caused by way of third-party intervention, corrosion, poor operation and maintenance, etc.

Meanwhile, ONGC recently made a significant discovery in the west Mumbai High fields in the Arabian Sea. In a written reply to a question in the Lok Sabha on Monday oil minister Dharmendra Pradhan said the discovery was made in the well WO-24-3 (WO-24-C) drilled west of Mumbai High fields."Based on the data generated during drilling, nine objects/zones were identified and on testing all the objects flowed oil/gas," Pradhan said. The discovery has indicated potential in-place reserves of about 29.74 million tonne (mt) of oil and oil equivalent gas.

"The ninth object on testing flowed oil at the rate of 3,310 barrels per day and gas at the rate of 17,071 cubic metre per day," the minister said. "This multi-layered oil and gas accumulation in this well opened up a new area for exploration/development." Mumbai High, India's biggest oil field, currently produces 205,000 barrels of oil per day (just over 10 mt per annum) and the new find would add to that production in less than two years.

ONGC is carrying out a further appraisal of the discovery and has intimated upstream regulator the Directorate General of Hydrocarbons (DGH). The new find, which comes almost 50 years after ONGC began production in Mumbai High, will help the company maintain production levels from the basin for a longer time than currently estimated. Mumbai High is ONGC's flagship oil producing assets. It along with other small fields along the western offshore produce 16 mt per annum of oil, which is 44 % of India’s total crude oil production of 36 mt. ONGC produced 25.5 mt of oil in 2016-17, which will reach 28-29 million tonnes by 2019-20, officials said.