石油学报 ›› 1991, Vol. 12 ›› Issue (1): 49-59.DOI: 10.7623/syxb199101007

• 油田开发 • 上一篇    下一篇

聚合物地下交联调剖数学模型

袁士义   

  1. 石油勘探开发科学研究院
  • 出版日期:1991-01-25 发布日期:2013-07-08

A MATHEMATICAL MODEL OF HIGH PERMEABILTY CHANNEL BLOCKAGE IN A HETEROGENEOUS RESERVOIR BY IN-SITU POLYMER GELATION PROCESS

Yuan Shiyi   

  1. Research Institute of Petroleum Exploration & Development
  • Online:1991-01-25 Published:2013-07-08

摘要: 本文建立了一个两维两相多组分聚合物地下交联调剖数学模型。它除了考虑了聚合物驱本身的各种物化现象(粘度,阻力系数,残余阻力系数,聚合物的吸附滞留,扩散,不可及孔隙体积,流变特性,含盐量及其变化的影响等),还考虑了聚合物和交联剂在地下经过交联反应后,产生胶结物质封堵高渗透层过程所涉及的各种物化现象(交联反应及其动力学规律,残余阻力系数增加,胶结物封堵特性等),较好地描述了聚合物驱及地下交联调整驱动剖面的过程。模型的使用,表明它对于辅助研究调剖机理及特性,设计实施方案(如堵剂种类,浓度,用量,注入方式,各种操作参数的选取),预测调剖后的驱替动态及采收率等,是一个非常有用的工具。文中算例表明对于纵向渗透率差异较大的层状非均质油藏,利用调剖技术与水驱或聚合物驱相比,效果都得到了改善,而这种改善的程度则与封堵地层的深度有直接的关系。

关键词: 聚合物段塞, 聚合物驱, 残余阻力系数, 数学模型, 胶结物质, 调剖, 交联剂, 交联反应, 物化现象, 采收率

Abstract: This paper presents a two-dimensional (cross-section or plane) 2 phases (aqueous and oleic) multicomponent (seven components at least: water,oil, polymer, crosslinker, gel, monovalent and divalent cations) in-situ polymer gelation mathematical model. It takes the reaction of polymer-crosslinker and gel blockage of high permeability channel into concider action in addition to the phenomena involved in polymer flooding (viscosity, mobility reduction, residuel resistance,absorption, dispersion, inacces sible pores, rheology, salinity effect, etc). This model can be used to simulate water or polymer flooding and in-situ gelation process. Its application demonstrates that it is a very useful tool for studying different mechanisms, forcasting displacement performance and oil recovery, and designing the operation plan (such as kinds of their chemicals concentration, and quantity, injection strategy, operation parameters, etc) in such a technique. The examples in this paper give the results that the oil recovery by using gelation technique is better than that either by water or polymer flooding for a stratified reservoir with strong permeabilty difference between each layer, and the improvement of oil recovery depends on the depth of the blockage into the formation directly.