STUDY ON DRILL BIT SELECTIONS FOR XIJIANG EXTENDED-REACH WELLS IN SOUTH CHINA SEA

In this article, the evaluation results of rock mechanics parameters of XJ24-1 oil field are given by operations on Software for Rock Mechanics Analysis and Drill Bit Selections based on the electrical logging data as input. The anti-drilling characteristics of the formations is illustrated with the help of the above results, which shows rock strength and abrasiveness increasing with hole depth and the formation is difficult to be drilled. Base on the analysis, several appropriate drill bit types are recommended for drilling into the formations in XJ24- 1 oil field and are of good performances while drilling into the extended -reach wells in this oil field.