摘要
为了探讨水平井筒方向对分段压裂产量的影响,文中采用数值模拟方法,在系统划分网格的基础上,运用Eclipse软件中的近井模型(NWM),建立起包含水平井筒和斜交裂缝的数值模拟模型,通过定义水平井筒与最小水平主应力不同夹角相对于0°时的减产率来表征斜交裂缝对压后产量的影响。结果表明:随着地层渗透率的增加,井筒方向对压裂产量影响程度减小;地层渗透率大于0.005×10-3μm2,当水平井筒与最小水平主应力夹角小于30°时,减产率小于3%。该研究成果为水平井钻井方向的选择提供了理论依据。
In order to investigate the influence of horizontal well direetion on the production after muhi-stage fracturing, based on the systematical gridding, this paper uses reservoir simulation method and the NWM model in Eclipse to build the simulation model containing the horizontal well and heterotropic fractures, which is the key to simulation of heterotropic fractures. In addition, we define the production redtiction rate to indicate the influence of horizontal well direction on the production after fracturing. Resuhs indicate that the influence of horizontal well direction on production reduces as the formation permeability increases; when the fonuation permeability is higher than 0.005 md and the intersection angle between the horizontal well and the minimal horizontal insitu stress of the formation is smaller than 30°, the production reduction rate is less than 3%. This study can provide theoretical basis for the drilling direction design of horizontal well.
出处
《断块油气田》
CAS
2013年第6期788-790,共3页
Fault-Block Oil & Gas Field
基金
国家科技重大专项"低渗
特低渗透油气田经济开发关键技术(二期)"(2011ZX05013)
中石油股份公司重大专项"体积压裂设计
实时监测及改造后评估技术研究"(2012FCGYLGZ001)
关键词
水平井
分段压裂
近井模型
斜交裂缝
减产率
horizontal well
staged fracturing
NWM
heterotropic fracture
production reduction rate
