Feasibility assessment of safe application of turbine drill in block Mai 1

The technique of turbine drill has been planned to apply in block Mai 1 in order to improve production efficiency; however, due to the low ROP in igneous rocks in the Kaipaizileik Formation, collapse may happen in some wells and cause drilling stuck. So it is necessary to carry out a feasibility assessment. Through the analysis of igneous rock size, falling collapse time and log data, the debris falling collapse cycle, size and quantity proportion have been realized and the falling well section has been defined. According to the request of well bore structure of block Mai 1, from the viewpoints of optimizing assembly and carrying rock, we analyze how to use 139. 7 mm drill pipe under the condition of pump pressure to allow and reduce circulating pressure loss, improve annular return velocity, determine debris falling security to carry out the limit of well depth and pump rate, and finally reduce the risk of drilling stuck. The purpose of using turbine drill in igneous rock formation drilling safely and quickly has been achieved.