摘要
测定了引起疏松砂岩出砂的门限流速及导致岩石结构破坏、大量出砂的临界井底流压,描述了计算门限流速和临界井底流压的数学模型及方法。研究表明,门限流速是储层特性、流体粘度、离子价数和电解质浓度的函数,储层一定时。流体粘度越大,以及离子价数、电解质浓度越低,门限流速越小,越易引起出砂而损害储层;而临界井底流压主要决定于岩石的强度参数和地应力分布等,对于同一储层,不同井深处的临界井底流压也会不同。研究结果在7—39—405井得到了现场应用。
Based on the core flow test and triaxial stress test, the threshold flow rate that causes sand producing in unconsolidated sandstone reservoir, and the critical flowing bottom hole pressure (FBHP) that causes serious sand producing or rock texture destruction are determined. The calculation methods for threshold flow rate and critical FBHP are developed. It is shown that the threshold flow rate is a function of reservoir property, fluid viscosity, ion valence and electrolyte concentration, and critical FBHP depends upon the rock strength and formation stress. An application in Gudong area of Shengli oil field is present-ed.
出处
《钻井液与完井液》
CAS
1996年第2期9-12,共4页
Drilling Fluid & Completion Fluid
关键词
防止
地层损害
出砂
砂岩
油气藏
油井防砂
Sand Producing
Formation Damage
Mathematical Model
Critical Property
Pressure
Flow Rate
Sand Control
Unconsolidated Formation