靖边下古气藏陕66井区合理采气速度研究

Research on the reasonable gas recovery rate of Block Shan 66 in lower Paleozoic gas reservoir,Jingbian

气藏合理的采气速度是以储量为基础,在现有的开采技术条件下,尽可能满足国家和社会对天然气的需求,使气藏开采具有一定的规模和稳产期,有较高的采收率,能获得最佳的经济效益和社会效益。本文针对长庆油田下古气藏陕66井区,综合考虑多方面的因素,如:采气速度与井网密度,采气速度与储量丰度的匹配关系以及不同采气速度下气井产能与井距关系等角度对采气速度进行了研究和探讨,推荐了合理的采气速度。并指出,在考虑到该气田物性参数较差、气藏非均质严重等条件下,该值应作为合理采气速度的上限。

Reasonable gas recovery rate in gas reservoir is based on reserve,under the condition of current production technologies,trying to meet the need of state and society to natural gas,which made gas reservoir produce in large scale and keep long stable production period in order to obtain the best economical and social profit.The paper is aimed to Block Shan 66 and discussed gas recovery rate by considering various factors such as relationships between gas recovery rate and well pattern density and reserve abundance,relationship between gas well productivity and well spacing under the condition of various gas recovery rates,finally reasonable gas recovery rate was recommended.Considering practical situations such as bad physical parameters and serious heterogeneity in the gas reservoir,the value was considered as the upper limit of reasonable gas recovery rate.