Prior Choice Of Perforating Parameter In Gulongnan Region

Perforated completion is one of the most common oil and gas well completion method, if optimal design of perforation parameters does not be considered, sand production or or lower capacity will happen. Sand production is a very important issue, which is also often encountered while drilling or proucting, in addition the cost of prevent and govern sand production is very large, so the study of sand prevention is very valuable and meaning.Setting producing pressure makes the pressure in well is lower than formation pressure, formation fluid flows in well through perforating bore, the fluid flow causes changes in pore pressure, and pore pressure changes lead to changes in rock frame stress, so study on stress of perforating bore needs to consider fluid-structure interaction. In this paper, sand production theoretical model is established, which is suitable for perforation, using seepage mechanics and rock mechanics, combined with the classical theory of fluid-structure interaction, based on much previous analysis of experiment and study. Through the finite element discretization and solution, the stress state of perforation completion hole is obtained, and the impact of various factors to perforated well sand production and production capacity is analyzed, then finding out the Influence rules, this study can provide a theoretical basis for Optimization of perforation parameters.For Prior Choice of Perforating Parameter in Gulongnan area, rock parameters and stress conditions should be acquired firstly, in this paper, laboratory core experiments are proceed to study geology of this area. For the specific situation in this region, combined with the stress distribution around perforating hole and the rock failure criteria, make the Prior Choice of Perforating Parameter which is suitable for Gulongnan area.