石油与天然气地质 ›› 2007, Vol. 28 ›› Issue (1): 88-91.doi: 10.11743/ogg20070112

• 油气开发地质 • 上一篇    下一篇

新场蓬莱镇异常高压气藏气体单相渗流实验特征

郑祥克1, 何顺利2, 王昔彬1, 李远钦1   

  1. 1. 中国石油化工股份有限公司, 石油勘探开发研究院, 北京, 100083;
    2. 中国石油大学, 北京, 102249
  • 收稿日期:2006-11-04 出版日期:2007-02-25 发布日期:2012-01-16
  • 基金项目:

    中国石油化工股份有限公司"提高采收率先导试"验项目(YTB2001-02)

Gas single-phase percolation characteristics of overpressured gas reservoir in Penglaizhen Formation,Xinchang gas field

Zheng Xiangke1, He Shunli2, Wang Xibin1, Li Yuanqin1   

  1. 1. Exploration & Development Research Institute, SINOPEC, Beijing 100083, China;
    2. China University of Petroleum, Beijing 102249, China
  • Received:2006-11-04 Online:2007-02-25 Published:2012-01-16

PDF (PC)

632

被引次数

8

摘要：

从气藏的常规岩心实验出发,结合气藏压敏性特征,引出了由于气藏压敏特征而产生的"滑脱"现象和"启动压力"特征。通过对四川蓬莱镇浅层异常高压致密气藏岩样单相渗流数据的分析,探讨其出现既有"滑脱"现象又有"启动压力"特征这种复杂渗流特征的原因,认为这种渗流特征主要是由于压敏特征,而很可能不是传统的滑脱机制或低速非达西机制所致。实验结果显示,新场蓬莱镇组气层压敏特征明显,拟合系数a的范围为0.3～1.9,渗透率降低幅度约为10%～80%。

关键词: 异常高压, 渗流特征, 蓬莱镇组地层, 新场气田

Abstract: Based on the conventional core experiments and pressure-sensitive features of gas reservoirs,it is suggested that the "slip flow of gas" and "threshold pressure" may be caused by pressure sensitivity of gas reservoir.This paper takes the overpressured tight gas reservoir in the shallow Upper Jurassic Penglaizhen Formation,Xinchang gas field,Sichuan province,as a research object,analyses the data collected from gas single-phase percolation experiments on its rock samples,and discusses the causes of the sophisticated percolation process with the coexistence of "slip flow of gas" phenomena and "threshold pressure" features.It proposes that the percolation process be induced by pressure sensitivity rather than by traditional Klinkenberg effect or low rate non-Darcy mechanism.The experiments also indicate that the Penglaizhen gas reservoirs in Xinchang gas field shows strong pressure sensitivity,and its fitting factor ranging between 0.3 to 1.9 and permeability reduction magnitude varying from 10% to 80%.

Key words: overpressure, percolation characteristics, Penglaizhen Formation, Xinchang gas field

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