Optimization Design Of Well Path In Coalbed Methane Well Factory

In the field of coalbed methane,the problems of low output of single well and long payback period are generally faced.In order to reduce cost and increase efficiency of CBM program,and to adapt to the harsh terrain conditions in CBM blocks,the optimization design of well path is studied in accordance with the experiment of coalbed methane well factory.In this paper,taking a block of Qinshui Basin as the research object,using the multi-component numerical simulation method,the corresponding parameters of directional and horizontal well pattern are optimized respectively to form the target layout scheme of well factory.Then by means of mathematical modeling method,an optimization model with multiple unknowns such as position or numbers of well pad and targets connected under the constraints of complex topography is established in order to achieve underground targets.By theoretical analysis and software calculation,based on the target distribution of well factory discussed as the foregoing,the single well and well factory well path are designed according to the drilling engineering design principles and standards,and optimized based on the anti-collision scanning method,finally a set of for multi-well factory borehole model in China is developed,which can be used as a reference for field application and research on related problems.