Abstract FORASLIM 1 is an integrated Drilling and Coring system dedicated to the construction of wells with small diameter to depths of 3500m. The objective is to provide a high cost reduction of exploration drilling in remote onshore areas with the following requirements: Environmental impact minimisationDrilling EfficiencyDrilling safety(No reduction in well control and safety standards)Complete Geological Evaluation In order to reach these objectives a fit for purpose drilling system has been developed (ref. 1). The Slim Hole rig FORASLIM 1 has been commissioned in April 1994. The first drilling campaign was completed by ELF Gabon and is related in reference 2. The present paper relates the experience acquired with Shell during the drilling of three wells in Romania under an integrated services contract managed by the drilling contractor Forasol. This experience concerns the drilling and coring processes, and the quality of the geological evaluation obtained.
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