摘要
鄂尔多斯盆地上古生界气藏是一个低压、低渗透、以河流相沉积为主的大面积分布的岩性气藏,以辫状河发育为特征。有效储层的成因分析认为,有效砂体以孤立状或条带状为主。从目前已进行过单点法和修正等时试井测试的气井来看,两者确定的气井产能相差很大,表现为单点法确定的气井产能明显偏大,故无法指导配产。文章在分析条带状储层的渗流特征的基础上,建立了其渗流模型,导出了条带状储层的不稳定产能方程和拟稳定产能方程,通过现场测试资料的分析,取得了令人满意的效果。
The Upper Paleozoic gas reservoir in E'erduosi Basin is a widely-spreading lithologic gas reservoir with low pressure and permeability, which mainly consists of fluviatile deposits characterized by braid river developing. According to the analysis of reasons to generate the effective reservoirs, the effective sand bodies most are independent or strip-apparent. By the well test with the single point method and the corrected isochronal well test, it is found the productivity determined by the two methods has big difference. The productivity determined by the single point method appears too big, which can't be used to guide the production allocating. With analyzing the percolation features of the strip-shaped reservoirs, their percolation model is set up and the transient productivity equation and the pseudo-steady state productivity equation are derived for the strip-shaped reservoirs. According to the analysis of field test data, the results are satisfactory.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2005年第4期100-102,共3页
Natural Gas Industry
基金
中国石油天然气股份公司重大科技攻关项目(编号 030125-2)"低压低渗气藏产能评价及气井生产规律研究"的部分研究成果。
