韦2断块低渗透裂缝性储层压力敏感性研究Study on the pressure sensitivity of the premeable fractured reservoirs in Wei 2 fault block
蔡刚
CAI Gang(No.2 Oil Testing Company of Jiangsu Oilfield Company of Sinopec;
摘要(Abstract)：
以韦 2低渗透裂缝性储层为研究对象, 通过实验得出储层渗透率随地层压力变化曲线。研究表明, 流体在低渗透裂缝性储层中渗流时, 存在明显的压力敏感性, 地层压力的变化可导致裂缝的开启和闭合, 进一步导致渗透率的改变。由于压力敏感性的存在, 在低渗透裂缝性油藏的开发中, 必须保持油藏处于合理的压力水平。
This paper takes the low permeable fractured reservoirs in Wei 2 fault block as the object. The reservoir permeability change curve with the formation pressure is obtained through experiments. The study shows that, the fluid has apparent pressure sensitivity when it flows in the low permeable fractured reservoirs.Change of formation pressure can cause the opening and closure of fractures, and further cause the change of permeability.The existence of pressure sensitivity requires a reasonable pressure level in reservoir during development of low permeable fractured reservoirs.
关键词(KeyWords)：
低渗透;裂缝;压敏效应;韦2断块
low permeable;fracture;pressure sensitivity effect;Wei 2 fault block
基金项目(Foundation):
作者(Authors):
蔡刚
CAI Gang(No.2 Oil Testing Company of Jiangsu Oilfield Company of Sinopec;