The Bit Selection Research on LS101

The well LS101 has a deep subject reservoir. The ROP is low and drill bits are changed frequently because of high formation hardness and high rock abrasiveness. Rock breaking mechanism of PDC bit and cone bit is analyzed in this paper. The main factors which affect rock breaking efficiency of bits are provided. LS101 deep formation data provided by REED Hycalog and well logging information are analyzed and Lithological features of LS101 deep formation are gained. Referred to the realistic behavior of each drill bit in this well, the results of bits selection on LS block are recommended, and have the model significance for the future drilling in the same formation of this block.