摘要
特低渗油藏渗流具有非达西特征，只有搞清非达西渗流的特征及规律，才能制定有效的开发技术政策。本文分析了启动压力梯度产生的机理，研究了启动压力梯度对特低渗透油藏主要开发指标——采出程度、采油速度、地层压力、井底流压和含水率与采出程度关系的影响。并且计算出了应用启动压力梯度计算合理井距、见水时间、产量递减规律的图版，对特低渗油藏的开发具有很好的指导意义和应用价值。
The oil percolation in extra-low permeability reservoirs is of non-Darcy character. Only if we clarify the characteristics and law of non-Darcy percolation can we make effective technical policies of development. The mechanism of causing the starting pressure gradient （SPG） is analyzed in the paper. Influences of the SPG to the main development indexes are studied, such as recovery percent of reserves, oil production rate, formation pressure, flowing bottomhole pressure, and water cut. The charts of using the SPG to calculate the rational well spacing, time of water breakthrough and law of production decline are worked out. Hope they have good guidance and applied value to the development of extra-low permeability reservoirs.
关键词
启动压力梯度
特低渗油藏
开发指标
starting pressure gradient
extra-low permeability reservoir
development index
