Study on Applicability of Self-cleaning Perforation Technology under Different Reservoir Conditions
Due to energy gathering perforation generating the compaction zone and explosive debris blocking the perforation holes,the use of self-cleaning perforating charges can effectively relieve the pollution damage of the energy gathering perforation to the perforation holes and improve the production capacity of oil and gas reservoirs.A dynamic perforation finite element model of＂self-cleaning perfo-rating charge-perforating gun-perforating fluid-casing-cement sheath-sandstone reservoir＂was established using LS-DYNA soft-ware and ALE algorithm,and its reliability was verified.Dynamic perforation simulation research was carried out.The influence of perfo-ration ammunition cover diameter and ammunition quantity on jet penetration effect of self-cleaning perforating technology under differ-ent reservoir physical parameters was analyzed,and compared with that of conventional perforation technology.Meanwhile,with the goal of maximizing the production capacity ratio,the applicability of the new self-cleaning perforation technology to reservoir physical param-eters is studied.The results show that the maximum error between the dynamic perforation finite element model and the target data is 5.2%,which proves the reliability of the model.The depth and diameter of the holes penetrated by different perforating charges vary regularly with the physical parameters of the reservoir,and show an upward trend with the increase of the diameter of perforation ammu-nition cover and the amount of ammunition.The average perforation depth of self-cleaning perforation technology decreased by 40.1%compared to conventional perforation technology,while the average hole diameterincreased by 15.1%.With the goal of maximizing pro-duction capacity,the new self-cleaning perforation technology has good self-cleaning perforating effect when the porosity of reservoir is 15%～25%,the compressive strength is 20～60 MPa,the elastic modulus is 2.4～3.6 GPa,the negative pressure is 0～10 MPa,and the confining pressure is 10～20 MPa.
self-cleaning perforationdynamic perforationLS-DYNAnumerical simulationapplicability of perforation technology
万方数据
维普
