The Minagish oil field is located in southern Kuwait. To date, 23 wells have been drilled in this field. The discovery well, MN-1, was drilled to explore a seismic prospect in this area and was completed in May 1959. The primary aim of this wildcat well was to test all the potentially oil-bearing formations down to and including the Jurassic Arab Zone equivalent. The well established the first commercial accumulation of oil in the Minagish Oolite Formation of Early Cretaceous age. The well found oil prospects in the middle Cretaceous Wara, Mauddud, and Burgan Formations. The Minagish oolitic limestone of Early Cretaceous age is the main oil-bearing reservoir in the Minagish field. The Mishrif Limestone Formation of uppermost Middle Cretaceous has also been found productiv in two of the Minagish wells. The quantitative evaluation of well logs indicate that the Upper Cretaceous Tayarat Formation and the Paleocene-lower Eocene Radhuma Formation may also be prospective in this field.
The well evidence suggests that the field is located on a north-south-trending anticlinal structure which has been cut across by a few faults. The structure is oriented north-south. It is 8 km (5 mi) wide and 14 km (9 mi) long. The structural closure is about 200 m (650 ft). The thickness, porosity, and shaliness variation of Ratawi Limestone suggest that, in all probability, the structure was existing in an incipient form at the time of the deposition of this formation. Maps of gross thickness and average effective porosity as derived from the quantitative log evaluation have been prepared for the formations of interest. The reservoir parameters show an overall conformance with the structure.