油藏启动压力研究基础理论问题探讨　　

Basic theory research on reservoir starting pressure

郑力会 康晓东 蒋珊珊 赵文森 曾杨

ZHENG Lihui KANG Xiaodong JIANG Shanshan ZHAO Wensen ZENG Yang

中国石油大学石油工程学院，北京　102249 中国石油钻井工程重点实验室防漏堵漏分室，湖北武汉　430100 海洋石油高效开发国家重点实验室，北京　100027

College of Petroleum engineering, China University of Petroleum, Beijing 102249, China CNPC Key Laboratory for Petroleum Drilling Engineering Lost Circulation Control Division, Wuhan 430100, China State Key Lab of Offshore Oil Exploitation, Beijing 100027, China

大多数学者认为油藏存在启动压力，认为启动压力为流体边界层性质异常、流体非牛顿性以及油气相渗透率滞后所致，但流体边界层性质异常已被化学界否定；小部分学者认为不存在启动压力，造成启动压力存在的假象是因为岩石自身应变需要响应过程、实验仪器精度有限、人为测量误差以及储层伤害引起附加压差等，而且以启动压力梯度的存在无法解释油气运移和生产压差现象为例证说明不存在启动压力。调研发现，启动压力相关问题一直在研究，且还有许多工作要完成。这些工作的核心是要弄清楚启动压力的内涵。

Most scholars believe the existence of starting pressure, thinking of the threshold pressure resulted from the abnormal of fluid boundary zone properties, non-Newtonian fluid and the lagging of oil-gas phase permeability. But the abnormal of fluid boundary layer properties have been proven to be negative by chemical experts; Small part of scholars believe that there is no threshold pressure, and the illusion of starting pressure existing is because of the respond process of rock strain, the limit of experimental instrument accuracy, man-made measurement error, and additional pressure difference caused by reservoir damage, besides, the presence of threshold pressure gradient cannot explain hydrocarbon migration and production pressure differential phenomena, so the exemplified explanation means no start-up pressure. The investigation shows found that, threshold pressure related problems have always been studied, and there is still much work to do. The core of the work is to make clear the connotation of starting pressure.