摘要
为了准确预测压裂水平井的产量,综合考虑流体在储层、井壁、压裂裂缝、射孔孔眼以及水平井筒中的流动过程,根据势叠加原理,建立了考虑射孔孔眼、压裂裂缝生产干扰作用下的井筒、油藏耦合压裂水平井非稳态产能计算模型。结果表明:只考虑裂缝生产与裂缝、孔眼同时生产时的水平井产量在生产初期差别较大,生产后期差别变小;由于裂缝、孔眼的干扰,水平井筒两端裂缝的产量高于中间裂缝的产量;由于井筒摩阻作用,关于水平井筒中心对称的裂缝流量不相等;随着裂缝长度增加,裂缝、射孔孔眼、水平井产量增大;随着裂缝导流能力增加,裂缝产量增大,射孔孔眼产量降低,水平井产量增大;射孔段越长,孔眼与裂缝的干扰愈强,单个孔眼的产量降低,但由于射孔数增加,水平井产量增大;射孔深度增加,压裂水平井产量增加。
In order to calculate productivity of hydraulic fracture horizontal wells precisely,considering the reservoir seepage,borehole wall inflow,fracture and perforation flow＇s mutual influence,an unsteady state computation model of fractured horizontal well coupling with reservoir was established based on the superposition principle.Calculation results showed that compared to the horizontal well production only from fractures,the difference of that from fractures and perforations was great early and later decreased slowly.Because of mutual interference,different location fractures had different flow rates and the central-fracture production was lower than that of the outer-fracture.The production of the fractures with horizontal well bore center symmetry was unequal due to the influence of well bore friction.Along with the fractures length increased,the horizontal well production increased.As the conductivity increased,the fractures＇ production increased,while the perforation＇s production decreased and the horizontal well production increased.With the longer perforation length,the interference of perforations and fractures interference became stronger,so the single perforation production reduced,while the perforation number increased,the horizontal well production increased.As the deepening of perforation depth,the horizontal well yield increased.
出处
《现代地质》
CAS
CSCD
北大核心
2011年第6期1159-1166,共8页
Geoscience
基金
国家自然科学基金项目(51074138)
关键词
井筒
油藏
耦合模型
压裂水平井
非稳态产能
影响因素
well bore
reservoir
coupling model
fractured horizontal well
unsteady state
affecting factor
