1.中海油研究总院有限责任公司 北京;2.西安石油大学 西安
1.CNOOC Research Institute Co Ltd;2.Xi'3.'4.an Shiyou University,Xi'5.an
The main influencing factors of perforation completion on oil well productivity are hole depth, hole density, hole diameter and hole phase. The optimal design of perforation parameters based on the optimal oil well productivity is one of the key technologies to improve the productivity of perforated wells. Based on the semi analytical model of perforated well productivity, this article uses the finite element analysis method to simulate the productivity of perforated well, and uses the orthogonal experimental method to analyze the numerical simulation results. The results show that the productivity ratio increases with the increase of hole depth, and the slope is large when the hole depth is small. When the hole depth exceeds the depth of drilling pollution zone, the curve has an inflection point, and the slope becomes smaller and flattened. With the increase of hole diameter, the productivity ratio increases. In the actual perforation process, considering the problem of casing strength, the hole diameter should be taken as maximum as possible under the condition of ensuring casing strength. The productivity ratio increases with the increase of pore density, and the upward trend of productivity ratio decreases with the increase of pore density. With the increase of phase angle, the productivity ratio decreases. When the phase angle changes from 60 ° to 90 °, the productivity increases greatly. When the phase angle changes between 90 ° and 180 °, the productivity does not change much. The primary and secondary relations of each factor is judged by comparing the range value R. This article can provide guidance for the optimization of perforation parameters.
幸雪松,邱浩,文敏,等. 基于正交实验法射孔参数优化设计数值模拟研究[J]. 科学技术与工程, , ():复制