Drilling process for the directional section of ZK2 geothermal well in Xiushan county， Chongqing

Abstract:

ZK2 well is a geothermal well in Xiushan county of Chongqing city. It reached the design target formation of the Loushanguan Group at depth of 1674.28m， but the water yield did not meet the requirements. In order to increase the water yield to achieve the purpose of tourism development， new water-bearing target areas were investigated according to geological data and geological means， and a plan for directional drilling from 1674.28m was determined. With the MWD tool and the bent mud motor， the inclination and azimuth of the well were adjusted through the combination of sliding drilling and compound drilling with the well successfully drilled into the target area to increase water production and temperature.