Research On Well Test Interpretation Method Of Sectional Production In Horizontal Well And Safety Evaluation Of Tool In Well

With the accelerating pace of daqing oil field exploration,fuyu reservoir such as,high table gradually become the exploration focus areas,for such dense reservoir,horizontal well fracturing technology volume is one of the important means for improving the productivity of single well,in view of the horizontal well fracturing rear liquid volume process at present there exist the following requirements;the existing fracturing the theoretical model of well test analysis of horizontal well and interpretation requirements method lags behind the segmentation field application requirements of test process,test interpretation software at home and abroad at present has not yet formed section;For horizontal well production technology,in the construction of the tubing string mechanics analysis and string safety is the key,if can effectively for the rod and pipe string in front of the construction of the force deformation analysis,and find all kinds of the influence of parameters on the deformation analysis,and find all kinds of the influence of parameters on the deformation of the rod sting stress,and thus for the parameter and scheme optimization design,to improve the success rate of site operation has important guiding significance.This article through to all well,and establishment of mathematical model for solving research,in view of the fracturing of horizontal section test,analysis of single card test process flow mechanism of interference between the middle,more area is established mathematical model of linear composite block test segment by segment and external pressure of typical curve influence factor analysis,to determine the parameters interpretation steps;The stress state mechanics model of the string is established by using the borehole trajectory data,the structural parameters of the string and the stress analysis of the columns.Based on the stress analysis of the sucker rod string,the mechanical analysis model of the hydraulic column of the screw pump in the horizontal well is established.The continuous curves of bending stress,axial stress,tangential stress and radial stress are calculated,and the stress state of the string is analyzed accurately.The fourth strength theory is adopted to calculate the combined stress state,and the strength safety factor is obtained by comparing with the yield stress,and the safety evaluation of the string is realized.By conducting the research of this paper,the formation of a set of perfect horizontal well test interpretation,evaluation and string safety evaluation technology,optimized design for horizontal well drilling project,provide a scientific basis for exploration in reservoir and subsequent development plan,meet the needs of the dense reservoir of daqing oilfield exploration.