摘要
针对低渗透油藏压裂水平井裂缝参数难确定的问题,为了研究裂缝对于水平井生产效果的影响,在某低渗透油藏概念模型的基础上,运用数值模拟方法对裂缝间距、裂缝长度布局和裂缝与井筒夹角等参数进行研究。结果表明,针对某一特定油藏,存在裂缝间距最优情况,裂缝U型布局是最优的,特别对于低渗透油藏,两端裂缝贡献尤为明显,裂缝与井筒正交时效果最好,夹角大于50°时,对生产效果影响较小。实际油藏应根据不同的油藏参数来考虑优化各裂缝参数。
In consideration of the problem of difficult to determine fracture parameters of fractured horizontal wells in low permeability reservoirs,and in order to study the influence of the fractures on horizontal wells,reservoir simulation method was used to study the fracture parameters,such as fracture distance,its length and parameters of fracture with included angle on the basis of the concept model.The results show that there exists optimal spacing between fractures in a specific reservoir.U fracture length is optimal,particularly for a low permeability reservoir,the contribution of the fracture on both ends is obvious.The best effect is obtained as the fracture is perpendicular to the direction of the fracture.When the included angle between fracture and horizontal wellbore exceeds 50°,the effect on the production is less.Optimization of fracture parameters should be considered according to different reservoir parameters.
出处
《石油天然气学报》
CAS
CSCD
2013年第1期141-144,178,共4页
Journal of Oil and Gas Technology
基金
国家油气重大专项(2011ZX05022-001)
关键词
低渗透油藏
水平井
数值模拟
压裂裂缝
夹角
low permeability reservoir
horizontal well
numerical simulation
fracture
included angle
