确定水驱气藏动态储量及水侵量新方法  

A New Method for Determining Dynamic Reserves and Water Influx in Water Drive Gas Reservoir

作　　者：胡俊坤[1] 李晓平[1] 敬伟 肖强 

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,成都610500 [2]中国石油青海油田分公司井下工艺研发中心,甘肃敦煌736200 [3]中国石油青海油田分公司冷湖油田管理处,甘肃敦煌736200

出　　处：《新疆石油地质》2012年第6期720-722,共3页Xinjiang Petroleum Geology

摘　　要：利用水驱气藏初期不产水时的不稳定试井资料,结合目前的生产动态资料,由气水两相稳定流时气相二项式产能方程,确定出气藏目前条件下的气相渗透率。在此基础上,根据储集层的气水相对渗透率曲线,确定出目前条件下气藏的含水饱和度,再结合水侵量的物质平衡原理,建立水侵量与动态储量的关系式。将此关系式与水驱气藏的物质平衡方程联立求解,最终可同时获得水驱气藏的动态储量及目前条件下气藏的水侵量。实例计算表明,该方法避免了复杂的水侵量计算,计算结果准确,实用性强。Based on the non-stabilized well test data in the early stage of water drive gas reservoir without water production, combined with the present production performance, this paper determines the current gas permeability by means of gas binomial deliverability equation of gas-water two-phase stationary flow, by which gives the current water saturation in terms of gas-water relative permeability curves in this reservoir, and then using material balance principle of water influx, establishes the relationship between the water influx and the dynamic reserves. Integrating this relationship with the material balance equation of water drive gas reservoir, the dynamic reserves and the current water influx of such a reservoir can be determined finally. The case study indicates that this new method is accurate and practical by avoid- ing complicated calculations of water influx.

关 键 词：水驱气藏 动态储量 水侵量 物质平衡方程 相对渗透率曲线 

分 类 号：TE318.8[石油与天然气工程—油气田开发工程] TE332