摘要
断层封堵增加了断块油藏水平井产能评价的难度。基于镜像反映原理与微元线汇理论,建立了考虑断层封堵影响的水平井井筒与油藏耦合条件下稳态产能评价半解析模型,并定量分析了断层对水平井近井地带流线的封堵作用及其对水平井产能的影响。现场实例应用表明:耦合模型产能计算结果与实际产能相对误差均在工程要求范围之内(<±15%),是断块油藏水平井产能评价的一种有效手段。水平井产能随其与断层距离的增大呈对数式上升,断块油藏水平井与断层的合理间距应为150 m。
Productivity evaluation for horizontal well of faulted block reservoirs is difficult due to the impact offault.On the basis of the image method,the semi-analytical models of steady productivity prediction is establishedunder the coupling of the horizontal wellbore and reservoir.The quantitative analysis of the fault sealing impact isalso conducted.The error calculated by the model is between ±15% which could be accepted in field application.Itis an effective method for the productivity evaluation of horizontal wells in faulted block reservoirs.If the distancebetween the fault and the horizontal well is the range of 4.5 times of the horizontal section length,the productivityof the horizontal increases with the distance increasing.Else if the distance is more than 4.5 times of the horizontalsection length,the fault sealing impact decreases with the distance increasing.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第5期131-135,200,共5页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家科技重大专项"大型油气田及煤层气开发"(2008ZX05024-02-12)
关键词
断块油藏
水平井
产能评价
耦合模型
断层封堵
faulted block reservoir
horizontal well
productivity evaluation
coupling flow model
fault sealing
