Buhari Flags Off First Oil Exploration In North-East of Nigeria
Since the morning of Wednesday 25th May 2022 when the management of Caritas University Amorji-Nike near Emene in Enugu East Local Government Area of Enugu state and the authorities of Enugu Capital Territory Development Authority (ECTDA) released a joint statement bringing to the notice of Nigerians an incident of an ‘inexplicable’ fire outbreak that till date has defied all attempts to put it out, speculations are rife with different assumptions as to the possible cause(s) of the fire with most people concluding it has to be gas flaring.
The fire incident which allegedly started as a result of borehole drilling by the institution prompted the authorities of ECTDA through its chairman Dr Josef Onoh to announce its decision to embark on a door-to-door search to ascertain operators of unauthorized boreholes in the state.
According to him, the ECTDA and the state Ministry of Environment will embark on an intelligent clampdown on all illegal boreholes, especially along the Oil and Gas pipeline that runs through the state to prevent such fire disasters in the future in the state.
Even though experts opined that the fire is a result of Natural Gas Combustion from 1200 feet of gas trapped underground that contains butane and propane, In its quest to get a more informed and broader explanation of the possible cause(s) of the fire, LEKKI TIMES sought the opinions of 2 oil and gas experts Sir Ogochukwu Azike, a Senior Production Geologist and Engr.Lazson Nchekwube A Lead Reservoir Engineer both for Heritage Energy an oil and gas firm.
Engr Nchekwube Lazson
Sir Ogochukwu Azike
According to Sir Azike, The fire explosion at Caritas University resulting from the water borehole drilling activity at about 1000 ft below mean sea level is likely a coal bed methane (coal gas) unless there is a fault or a pathway for gas migration from deeper hydrocarbon-bearing reservoirs.
Sir Azike went on to state that the geology/stratigraphy of Enugu state has coal seam deposits in some locations. This could be Methane gas which is often found in association with coal deposits.
These deposits might be virgin coal seams (coal seam methane/coal bed methane). That can be mined, produced or abandoned depending on the economics. Gas from each of these may be suitable for the production of power.
In the USA, Coal Bed Methane (CBM) is explored and produced in some areas. In addition, based on Azike’s study and having worked in Anambra Basin, the basin has hydrocarbon potential. Anar-1 Well was re-entered during President Goodluck Jonathan’s administration and produced oil over a period of time. The oil is of good quality with high API gravity. The hydrocarbon-bearing reservoirs within the basin are more gas prone. For example, the Alo field has billions of cubic feet of gas reserves. The basin is under-explored and has a future opportunity for further appraisal and development.
Engr Nchekwube Lazson added that this phenomenon before fire always starts as a wide wind coming out of the drill hole (a Kick) pushing their drilling equipment out of the hole due to high pressure in the formation. The gas in the formation is trying to escape from the high-pressured zone to the surface. He advised that what the driller should have done upon noticing that was to increase their mud weight with Barite circulation inside the hole. He further opined that the water drilling company had issues in pumping Barite slurries as their usual water pump will find it difficult.
So while the public (majority of whom are south-easterners are already basking in the euphoria of the prospect of discovery of a huge gas deposit in their domain thereby qualifying them to be listed amongst oil (gas) producing states) may want to tarry until findings are rounded off before they begin the celebrations.