Study on Formation Evaluation and Bit Selection for Kenkiyak Oilfield

Kenkiyak Oilfield was located at east edge of Caspian Sea Basin in the west of Kazakhstan Shore. Average drilling rate of this oilfield was only 0.92~1.63 meter per hour. In order to improve drilling rate, formation evaluation and bit selection for Kenkiyak Oilfield were developed. Based on logging data and core sample test results, rock mechanical parameters f are evaluated. Formation of second and third well segment in Kenkiyak Oilfield was classified into five parts according to rock mechanical parameters of the researched area. Then, in combination with statistical results of rock mechanical parameters, suggestions for bit selection of every well segment are given. According to evaluation results of bit performance, bit type for Kenkiyak Oilfield is optimized. The application results indicate that it is very important for personalized bit design.