非线性渗流复合气藏气井产能新方程分析  

Analysis on new productivity equation of gas well in composite gas reservoir with non-linear seepage

作　　者：熊健[1] 郭平[1] 张磊[2] 杜鹏[3] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石油大庆油田分公司油气工艺研究院,黑龙江大庆163000 [3]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《断块油气田》2012年第1期106-109,共4页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项"深水扇储层气田产能和开发指标预测研究"(2008ZX005056-02-02-03)

摘　　要：针对低渗透气藏的特征,推导建立了低渗透气藏气井产能预测模型,包括远井区考虑启动压力梯度和滑脱效应的气井产能方程,以及近井区考虑高速非达西效应的气井产能方程。研究结果表明:启动压力梯度和高速非达西效应使气井产能下降,启动压力梯度对气井产量的影响呈近似下降的趋势;增产措施和滑脱效应都使气井产能增加,滑脱效应对气井产量的影响呈近似上升的趋势,而增产措施中,某种意义上说明,相比增加缝宽,增加缝长更重要;在高流压阶段,启动压力梯度对气井产能的影响显著,而在低流压阶段,高速非达西效应和滑脱效应对气井产能的影响明显增强。In view of the characteristics of low permeability gas reservoir, a productivity prediction model of gas well was established, including the productivity equation of gas well considering the start-up pressure gradient and slippage effect in the distant well area and the productivity equation of gas well considering high speed non-Darcy flow effect in the near well area. The result shows that the gas well production decline is caused by start-up pressure gradient and high speed non-Darcy flow effect and the productivity decreases with start-up pressure gradient at linear relationship. Stimulation and slippage effect lead to increase in gas well production and the productivity increases with slippage efl＇ect at linear relationship. For the stimulation measures, it is more important to increase the fracture length in the sense of fracture width. In the high flowing pressure stage, the start-up pressure gradient has remarkable effect on gas well production. While in the low flowing pressure stage, the influence of high speed nonDarey flow effect and slippage effeet on gas well production is more obvious, especially for the slippage effect.

关 键 词：非线性渗流:启动压力梯度 滑脱效应 高速非达西 双重渗流特征 产能方程 

分 类 号：TE328[石油与天然气工程—油气田开发工程]