The Horizontal Eccentric Wear Mechanism And Research Of Prevention Measures

At present,the low permeability reservoir become the main object of the development of major oil fields,the horizontal well in low permeability oilfield has become effective means of mining industry value,has substantially increased the number of horizontal wells.With the large-scale development of horizontal well,the low permeability reservoir formation energy decreases rapidly,in the production work deepening pump production which leads to partial wear of horizontal well has become more and more prominent and becomes the main problem of horizontal well production.The comprehensive treatment technology of domestic horizontal wells is not perfect,firstly,through the establishment of horizontal well trajectory three-dimensional visualization and studying its characteristics,so as to intuitive understanding of well trajectory curvature changes and to judge wells worn qualitatively;Secondly,comprehensive considering the sucker rod supporting force of oil pumping rod centralizer and tubing.The The 3D borehole pumping rod by force analysis and the calculation of the distribution range and position along the well depth force distribution in the process of sucker rod,so as to judge well worn quantitatively and get the eccentric wear prevention targeted and effective supporting;Finally,according to the horizontal eccentric wear statistics,analysing the rules and effect of eccentric wear factor of horizontal well,has a classification of the degree of partial wear of horizontal well.The combination of all kinds of advantages and disadvantages of eccentric wear preventing tool,integrated sucker rod and tubing for supporting the on-site application of combinatorial optimization,Which forms a suitable horizontal well economic and effective governance system supporting anti abrasion.