摘要
指出低渗透稠油油藏具有明显的启动压力梯度,稠油在多孔介质中的渗流偏离达西定律,开发过程中储量的有效动用受到诸多条件的限制.基于低渗透稠油油藏基本渗流特征,利用弹性不稳定渗流和非线性渗流理论,分析低渗透油藏弹性能量开发中的不稳定渗流过程.考虑技术和经济因素,提出低渗透稠油油藏衰竭开发下储量有效动用界限,包括满足日产要求的有效动用半径,以及满足累计产油量要求的储量动用规模和动用半径.运用所建方法,对油田开发实例进行计算分析.研究表明,对于低渗透稠油油藏,要综合考虑技术和经济条件来确定油藏储量有效动用的界限,才能合理部署油藏开发井网.该研究为启动压力梯度油藏的有效开发提供了技术支持.
Porous flow mechanics of heavy oil in low permeability and heavy oil reservoirs is not in line with Darcy flow because of the threshold pressure gradient, and the effective drive of these reservoirs is restricted by more conditions. Based on characteristics of porous flow in low permeability and heavy oil reservoirs, analysis of unsteady flow drives by natural elastic energy in low permeability and heavy oil reservoirs was studied according to elastic unsteady flow theory and non-linear flow theory. Considering engineering and economic factors, the limits of effective drive for low permeability and heavy oil reservoirs was proposed. Based on the effective drainage radius for daily oil production and the effective drainage volume for cumulative production, the calculation methods used for practical examples of oil field development were given. The analysis shows that the deployment of well pattern for low permeability and heavy oil reservoirs depends on limits of effective drive considering both engineering and economic factors. The results could provide technical assistances for effective development of reservoir with threshold pressure gradient.
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2013年第2期210-215,共6页
Journal of Shenzhen University(Science and Engineering)
基金
国家科技重大专项基金资助项目(2011ZX05031-002-007HZ)~~
关键词
油田开发
低渗透油藏
启动压力梯度
不稳定流动
衰竭开发
储量动用界限
oil field development
low permeability reservoirs
threshold pressure gradient
unsteady flow
natu-ral depletion development
limits of effective reservoir drive
