水驱疏松砂岩气藏高效开发优化分析

OPTIMIZATION ANALYSIS OF HIGH PROFITABLE DEVELOPMENT FOR WATER-DRIVE UNCONSOLIDATED SANDSTONE GAS RESERVOIRS

生如岩

Sheng Ruyan

胜利油田有限公司开发管理部, 山东东营 257001

Dept. of Development Administration, Shengli Oilfield Co. Ltd, Dongying 257001, Shandong

在系统分析的基础上,提出了水驱疏松砂岩气藏新的开发优化模式。利用气水两相渗流模型、气井井筒两相管流方程、节流模型等成熟的理论方法,以地层到井底、井下气嘴、井筒、地面气嘴及地面管线等的压力降为联系,采用启发式算法或模拟退火算法等方法求解。与传统的局部、短时最优生产模式相比,该模式可以实现气藏整个系统最优化。该模式有利于减小对气藏的伤害,制定合理的气井工作制度,实现气藏高产、稳产。

Based on system analysis,a novel development optimization model is presented for water-driven unconsolidated sandstone gas reservoirs.Which utilizing well-rounded theories and methods such as models of gas-water flow in porous medium,equations of gas-liquid flow in wellbore and throttle models etc.,and combined pressure drop from production formation to sand surface,downhole movable choke,wellbore,wellhead choke,and the surface gathering and transportation lines,and it can be resolved by Heuristic Algorithm or Simulated Annealing Algorithm.Compared with conventional optimization production models with local and short time,overall production system optimization could be realized by the new model,which is beneficial to reduce damage to gas reservoirs,and establish rational working system for a gas well,ensuring gas reservoirs high-stable production.

10.3969/j.issn.1000-7393.2005.06.023