摘要
基于双层套管射孔后形貌的量化表征指标,在考虑多因素的情况下建立“多孔介质渗流+射孔孔眼内自由流”的耦合产能模型,并应用ANSYS数值模拟软件进行建模求解;设计多组数值模拟实验,在数模结果基础上利用最小二乘法对正交实验数据进行多元二次非线性回归,建立了各参数与双层套管射孔完井产能比之间的定量求解模型;用射孔末端缩小比来表征双层套管射孔内外层套管孔径变化对产能的影响,对经典油气井产能预测模型进行修正完善,建立了双层套管射孔产能预测的理论模型,进而通过分析各参数对其的影响规律优化了射孔参数。该研究对双层套管射孔参数的优选有一定的指导意义。
Based on the quantitative characterization index of the morphology of double casing after perforation,a coupling production capacity model of double casing well composed of porous media seepage and free flow in perforation hole is established and solved by ANSYS FLUENT software.Multiple sets of numerical simulation experiments are designed using orthogonal test design method,the multivariate quadratic nonlinear regression of the orthogonal experimental data is carried out using the least square method so as to establish the quantitative solution model between the parameters and the production capacity ratio of the double casing perforation well.The influence of perforating hole diameter changes of inner and outer casing on production capacity is characterized by the reduction ratio of perforation hole end.The classical production capacity prediction model is corrected and improved.Thus the theoretical production capacity prediction model of double-layer casing perforation is proposed.The parameters of infuencing production capacity are analyzed and the perforation parameters are optimized.The research provides guidance for the parameter optimization of double casing perforation.
作者
幸雪松
闫新江
文敏
张永涛
毕刚
齐致远
XING Xuesong;YAN Xinjiang;WEN Min;ZHANG Yongtao;BI Gang;QI Zhiyuan(CNOOC Research Institute Co.Ltd.,Beijing 100028,China;Shenzhen Branch,CNOOC,Shenzhen,Guangdong 518000,China;College of Petroleum Engineering,Xi’an Shiyou University,Xi’an,Shaanxi 710065,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2023年第2期96-104,共9页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家自然科学基金项目“基于离散裂缝网络的致密油藏体积压裂水平井渗吸产能研究”(52104033)。
关键词
双层套管射孔
产能预测
正交试验
非线性回归
射孔末端缩小比
double casing perforation
production capacity prediction
orthogonal test
nonlinear regression
reduction ratio of perforating hole end
作者简介
第一作者:幸雪松(1978-),男,高级工程师,硕士,研究方向:海上复杂结构井钻完井工艺及岩石力学研究。E-mail:xingxs@cnooc.com.cn。
