摘要
有效动用并经济开发低渗透油田储量,对石油工业的持续稳定发展具有十分重要的意义。特低渗透油层孔喉细小,流体呈微纳流流动,边界层效应凸显。因此,有必要研究边界层的形成机制和作用方式,并以此为理论基础,改变油层润湿性,提出提高流体渗透率的微流调控方法。综述了特低渗透油层边界层厚度对孔喉有效半径的影响,各种矿物/流体作用模型,双电层模型及其对流体渗流能力的影响,分析了当前微流调控的物理—化学方法。指出今后研究的重点方向为:①边界层层内分子相互作用方式;②相邻不同矿物微粒表面上边界层的相互作用及对流体渗流的控制机制;③逐步完善各种微流调控方法,并注重各种调控方法的协同应用。
The effective and economical development of low permeable reservoir is of great significance to maintain the sustainable development of China's petroleum industry.The fluids in ultra-low permeable oil reservoirs with narrow pores and throats flow in the form of mi-cro-nano-flow,and the boundary layer effect is much more remarkable.It's necessary to study the formation mechanisms and function of boundary layer,so as to alter the reservoirs' wettability and introduce the microflow regulation methods to improve the fluid permeability effectively.This paper has summarized and analyzed the boundary layer thickness and its effects on the effective radius of pores and throats,different kinds of mineral/liquid interface structure models,electric double layer models and its effect on the flow capability in oil reservoirs with ultra-low permeability,and current physical-chemical methods of microflow regulation.The focus for the future research have been summarized as follows:①the interaction between molecules in boundary layer;②the interac-tion between boundary layers of the adjacent mineral particle surface,and its effect on the controlling mechanism of flow in porous medium;and ③gradual improvement and synergetic application of different microflow regulation methods.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第6期85-89,共5页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"低渗透油气田储层保护技术"(2008ZX05022-04)
四川省杰出青年学科带头人培养基金项目(07ZQ026-113)
中国石油天然气集团公司应用基础研究项目"低渗透微裂缝油气层损害诊断及保护储层技术研究"(07A20402)
关键词
特低渗透油层
微流调控
边界层
双电层
矿物/流体作用模型
ultra-low permeable reservoir
microflow control
boundary layer
electric double layer,mineral/liquid interactive model
