石油与天然气地质 ›› 2004, Vol. 25 ›› Issue (3): 324-327,332.doi: 10.11743/ogg20040317

• 勘探开发 • 上一篇    下一篇

碳酸盐岩气藏出水特征分析——以华北油田苏4气藏为例

刘林玉, 柳益群, 李文厚, 陈刚   

  1. 西北大学地质系 大陆动力学教育部重点实验室,陕西西安 710069
  • 收稿日期:2004-03-10 出版日期:2004-06-25 发布日期:2012-01-16

Analysis of water production characteristics of carbonate gas reservoirs: taking Su 4 gas reservoir in Huabei oilfield as an example

Liu Linyu, Liu Yiqun, Li Wenhou, Chen Gang   

  1. Department of Geology, Northwest University, Xi'an, Shaanxi
  • Received:2004-03-10 Online:2004-06-25 Published:2012-01-16

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摘要：

气藏出水是气藏开发过程中的重要问题之一。碳酸盐岩气藏出水可分为凝析水产出与地层水产出两种类型,具有开采井段出水、纵向水窜和气-水界面上升3种方式,其中地层水产出严重影响天然气的正常开采。碳酸盐岩气藏虽然具有统一的压力系统,但由于碳酸盐岩储集层受构造活动和成岩作用的改造,其孔隙发育具有较强的非均质性。华北油田苏4气藏形成了3个次生孔隙带,因而各井区之间气-水界面变化很大,形成了较宽且不稳定的气-水过渡带,在开发中应严格控制产能,避免地层水的大量产出。

关键词: 碳酸盐岩气藏, 地层出水, 非均质性, 气-水过渡带

Abstract:

Water production is one of the key problems encountered in development of gas reservoirs. Water produced from carbonate gas reservoirs can be divided into condensate water and formation water, and the latter can severely influence normal recovery of gas. There are three modes of water production including water production from gas producing intervals, vertical water breakthrough and rising gas-water contact. Although the carbonate gas reservoir has a unitized pressure system, pores are generally characterized by their heterogeneity with three secondary porosity zones, due to the modification made by tectonic movement and diagenesis. As a result, gas-water contact varies greatly between wellblocks, and there will even be a wide unsteady gas-water transition zone, thus formation water production can easily occur during dynamic development.

Key words: carbonate gas reservoir, formation water production, heterogeneity, gas-water transition zone

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