A high-level probe into the incident of uncontrolable flow of gas and fire at a well of the Oil and Natural Gas Corporation Ltd.(ONGC) has been ordered which still continues to blaze in the Bombay High region even as steps are being taken by experts to 'kill' the affected wells.Meanwhile, a special vessel from Singapore is arriving here to conduct a shallow seismic survey in and around the area of blaze to locate the 'hot spot' due to charging of sub-sea layers and would also identifying the location of a relief well.