Drilling Optimization Practice and Suggestions of Permian Fengcheng Formation Shale Oil in Mabei Area
In recent years,the shale oil exploration of Fengcheng Formation in Mahu has made a major breakthrough,and the reserves of 305 million tons have been implemented,which has become the main strategic replacement layer producing 5 million tons in Mahu oilfield.There are huge differences between Mahu shale oil and other block shale oil in the aspects of pressure system,burial depth,lithology,etc.,and the applicability of existing technology is poor,and the investment of single well is high,which is difficult to support the cost-effective development and production.In order to further reduce the development cost of Mahu Fengcheng Formation,the pilot test of drilling optimization was carried out in the Ma 51X well area,and a set of horizontal well drilling optimization technologies was formed through a series of drilling optimization practices,such as improving production organization connection,scientific optimization of drilling parameters based on MSE mechanical specific energy,scientific borehole cleaning measures,optimization of acceleration tools and optimization of drill bit.Through the key test,the drilling cycle of the highly inclined penetration well is reduced from 78.21 days to 59.6 days,and the maximum penetration of the horizontal section is increased from 296 m to 460 m,which greatly reduces the drilling cost.However,at present,it is still necessary to further optimize the drilling for the difficult and high resistance formation,the wear resistance and collapse resistance of the drill bit composite sheet need to be improved,and the large torque screw is used to achieve efficient drilling.
NETL
NSTL
万方数据
