Three-dimensional Finite Element Analysis Of The Perforated Casing

The oil field casing damage are more and more many and has aroused everybody widespread interest, at the same time studies the discovery wrap to damage mainly occurs in the perforated zone, some even achieves above 70%. Therefore appears to the perforation casing research especially importantly. This article through analyzed the reason to the massive scenes documents collection which the perforation section drive casing damages, and the union existing drive casing perforation research technique proposed one new method: Through the establishment stratum rock, the cement sheath, the casing three dimensional full-scale mockup use advanced finite element analysis software ANSYS carries on the contact finite element analysis which the perforation drive casing damages.This article studies mainly includes three parts. Collect and analyze the part of the materials: Including damages the well to the scene wrap the geological position situation, the damage situation material diagnosis as well as the present related research progress situation; Test portion: Including to each kind of drive pipe in the different wall thickness, the different material, under in the different perforation parameter condition room experiments, the casing material, in the perforated zone rock mechanics performance room experiments; Finite element analysis computation part: Contains the rock, the cement sheath, the casing three dimensional finite element analysis model using the ANSYS senior modeling technology establishment, and the establishment contact unit uses the sub-module technology to carry on the analysis computation.Through the result we may see the three dimensional FEA to have the very high usability in the simulation which the drive pipe damages, the research technique which has compared with the present can reflect the real complex stress condition of casing which receives in the mine shaft, approaches with the real situation. Though the analysis of casing...