基于CEL方法的射孔侵彻套管三维仿真分析

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中图分类号：TE935文献标识码：ADOI：10.12473/CPM.202412020

3D Simulation Analysis of Perforation Penetrating Casing BasedonCEL Method

Dong KangxinglZhao Xinyu1Wei Yuyang1Du Binglong'Zhang Shanren² （1.SchoolofMechanicalScienceandEngineeringofNortheastPetroleum Uniersity2.DrllingToolCompany，CNPCGreat wall Drilling Company）

Abstract： Perforation is akey process for enhancing well productivity，and it especially plays a crucial role in the development of low-permeability oil and gas reservoirs.The perforation penetrating casing test is costly，with difficult dataacquisition.Therefore，the numerical simulation studyof perforation penetrating casing is of great significance. Based on ABAQUS numerical simulation software，a 3D finite element modelof perforating charge，perforating gun and casing was built using the coupled Eulerian-Lagrangian （CEL）method.By means of simulating and analyzing the entire processof metal jet penetration into the perforating gun and casing after initiationof perforating charge，the mechanism of perforating charge penetration into the casing and the stress variation at outer wall of the casing were thoroughly explored，and the variations of perforating charge energy and velocityas wellas the influences of different liner cone anglesand wall thicknesson perforation effect wereanalyzed.The results show that when the liner cone angle is in the range of 50o-70o ，the larger the liner cone angle，the higher the metal jet kinetic energy conversion eficiency.The peak velocityof the jet head is negativelycorrelated with the liner cone angle. When the liner wall thickness is in the range of 0.6-1.5mm ，the thinner the liner wall thickness，the greater the metal jet kineticenergyandthe higherthe jethead velocity.The study results provide theoretical support for optimizing perforating charge design and improving perforation effciency.

Keywords：perforation technology；3D simulation；numerical simulation；coupled Eulerian-Lagrangiar method; perforating charge;casing penetration

0 引言

射孔工艺在油气开发中扮演着至关重要的角色，其主要目的是为油气从储层流向井筒提供有效的通道[1。（剩余11621字）