Development And Application Of Stress Analysis Software For Multi-stage Fracturing In Horizontal Wells

Horizontal well multi-stage fracturing is the key technology for unconventional oil and gas reservoirs.It has become the main technology for unconventional reservoir since 1990.Previous horizontal multi-stage fracturing often don't consider altered-stress,which results in fracture formation natural cracks in a closed state.In this paper,some work was done in order to solve problems.When multi-stage fracturing horizontal well,the calculation model of single disturbance stress is established.The model can calculate horizontal principal stress and the vertical principal stress.According the principle of addition,the paper establish multiple fractures calculation model.Finally,on the base of theory study,induced fracturing pressure analysis software has been developed with C# language in this paper,and using it parametric analysis and field cases study were carried out.It is shown that some useful information about induced stress,and the reliability and applicability of this software is confirmed at the same time.