Abstract

North Kadi field, lying in the Ahmedabad-Mehsana Tectonic Block (Fig.1) of Cambay Basin in India was discovered in 1968. Hydrocarbon accumulations in the area have been established mainly from Kalol pays of Middle Eocene age, with Linch, Mandhali & Mehsana pays, lying within Kadi and Cambay Shale of lower Eocene age, also contributing to hydrocarbon production. Accumulations in shallow, post-Kalol sands have also been established sporadically from Balol pay within Tarapur formation (Upper Eocene to Oligocene age) and from pays within Babaguru and Kand formations (Miocene age). However, their discovery has been largely by serendipity or half-hearted endeavours while probing Kalol and deeper pays rather than through any concerted effort to explore them.