摘要
根据低渗透油藏的非达西渗流规律,建立并求解常流压条件下垂直裂缝井双线性流数学模型,推导出低渗透油藏垂直裂缝井的产能公式。研究表明,随表皮系数的增加,垂直裂缝井的产量在减小并趋于平缓,表皮系数5是一个明显的分界点,同时表皮系数对压裂井的初期产量影响很大。启动压力梯度对压裂井的初期产能影响不大。在生产后期,启动压力越大,产量下降越快。因此,在进行低渗透油藏垂直裂缝井产能分析时,必须在生产的后期考虑启动压力梯度的影响。
According to the non-Darcy percolation law in low permeability reservoirs, a numerical model for bilinear flow in vertical fracture well under normal flowing pressure is established and solved, and productivity formula curve is drawn. The result shows that with skin factor become higher, the initial production become lower and smoother, skin factor 5 is obvious cutting point. Skin factor has a big impact on initial production of fractured well. Threshold pressure gradient mainly affects the productivity of fractured well in late stage. The higher the threshold pressure is, the faster the production declines. Therefore, the impact of threshold pressure gradient must be considered in late stage of the productivity of fractured well in low permeability reservoir.
出处
《重庆科技学院学报（自然科学版）》
CAS
2009年第3期40-42,共3页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
关键词
低渗透油藏
产能
启动压力梯度
双线性流
垂直裂缝
low permeability reservoirs
productivity
threshold pressure gradient
bilinear flow
vertical fracture
