Reservoir characteristics interpretation by using specific energy with down-hole torque and drag

Abstract

This research studied the effect of down-hole specific energy using down-hole torque and drag on potential zone evaluation by developing a computer al. was used to calculate down-hole parameters, which are friction coefficient, down-hole torque and weight on bit, by The back calculation method. The down-hole drilling specific energy (DSE) was used as a specific energy calculation. The DSE was calculated every two meters. The high DSE indicates the hard formation or high inlet pressure. The inlet pressure means the pressure of water, oil or gas from the reservoir. Thus, the high DSE may indicate a potential a potential zone. However, well logging data can only locate the reservoir zone but may not be the potential for commercial, because it could suggest the perforation zone but could be low inlet pressure. In this study, the well logging, lithology and production data from two onshore wells belonging to Pan Orient Energy Siam (POES) were cooperated with DSE to interpret the potential zone. The results of interpretation help seiecl the most appropriate perforation zone and thus reduce the perforation cost.