肇州油田水平井水平段压降计算及测试  

Calculation and Measurement of Pressure Drop of Horizontal of Horizontal Interval Wells in Zhaozhou Oilfield

作　　者：董长银[1] 姬生柱[2] 王希涛[2] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061 [2]大庆油田有限责任公司第八采油厂,黑龙江大庆163514

出　　处：《大庆石油地质与开发》2005年第4期42-44,共3页Petroleum Geology & Oilfield Development in Daqing

摘　　要：水平井水平段的流动为变径入流量的变质量流动,根据动量守恒方程建立了水平段流动的压力梯度基本方程;通过不同位置的采液指数变化,表征水平井筒中的流动与油藏渗流的耦合,考虑孔眼入流情况下的管壁摩阻系数,建立了一套系统的水平井水平段压降计算模型及方法.水平段压力损失由摩阻压力损失、加速压力损失、混合压力损失以及势能压力损失等四部分组成.对肇州油田州62-平61井水平段压降进行了计算,并在相同生产条件下进行了测试,计算值与实测值误差6%.计算表明,肇州油田9口水平井的水平段总压降大约在0.048～0.26 MPa.The flow in horizontal interval of horizontal wells is characterized by variable mass flow with variable inflow through perforations. In this work, the basic equations of flow pressure gradient in horizontal interval are evolved from the momentum conservation equation. Considering the flow coupling between well bore flow and reservoir filtering flow by variable located fluid productivity index along the horizontal interval, an integrated model for pressure drop in horizontal well bore is established, which concerns the friction factor of perforated pipe with inflow. The pressure loss in horizontal well bore includes frictional loss, acceleration loss, fluid mixing loss and potential energy loss. The model has been used to predict the pressure drop in horizontal well bore of Well Zhou66-61 in Zhaozhou oilfield, and the result of which has a relative discrepancy of 6% comparing to the real tested value. The total pressure loss of these 9 horizontal wells in Zhaozhou field varies from 0.048MPa to 0.26MPa.

关 键 词：水平井 压降计算 变质量流动 流动耦合 压力梯度 肇州油田 

分 类 号：TE243[石油与天然气工程—油气井工程]