关键词: 苏里格气田, 钻井, 配套技术

Abstract: The formations of Sulige gas field are complicated and easy to cause well oblique, well catering and leakage, low mechanical drilling rate, and high drilling cost and drillingfluidcost, affectingexplorationand development progress. To improveeconomic performance, the efforts were madetostudyapplication and experiment of the systematic drilling process technology and drilling fluid system. A number of measures were taken to shorten drilling period and accelerate drilling rate, such as optimization and selection of PDC drilling bit, adoption of low-rate screw rod, optimization of drilling parameters, optimization and selection of drilling fluid system, and prevention of leakage and catering. Those measures led to satisfactory economic performance. The practice of 39 wells indicated that the average mechanical rate was improved 34.59 percent, the average drilling and completion time shortened 27.16 percent, creating a record high for drilling speed in Sulige region. With the downhole complexity reduced 6.93 percent, the one-time success rate of completion logging was improved 9.6 percent while drilling fluid cost was lowered 6.36 yuan per meter. Further efforts will be made in the future for study of anti-leakage and anti-catering technology and reduction of accident complexity so as to improve drilling rate and meet the requirements for safety, high quality and high drilling speed.

Key words: Sulige gasfield; drilling; systematic technology