摘要
建立了流线干扰数值试井解释模型,并运用流线法对模型进行了求解,可以模拟出无法用解析解表达的复杂油藏和流动阶段,能够考虑渗透率等地层参数的变化,能方便地考虑油藏的非均质性及各向异性.通过分析井距、井筒储存系数、表皮系数和油藏外边界对观察井井底压力响应的影响,认为:在建立干扰试井解释模型时,可以不考虑激动井的表皮系数及观察井的井筒储存系数;激动井的井筒储存系数越大、观察井的表皮系数越大,观察井中接收到激动信号的时间就越晚,但这种影响会随着激动井与观察井井距的增大而变小;不论油藏的外边界是封闭的、定压的还是无限大的,经过足够长的时间后,观察井的压力导数曲线将和激动井的压力导数曲线重合,可据此区分多井干扰时的干扰信号.
A streamline interference numerical well test interpretation model is established,and it is solved by streamline method. Using the model can stimulate the complicated reservoir and its flowing phases which cannot be expressed by analytic solution,and the change of formation parameters such as permeability,the heterogeneity and anisotropy of oil reservoir are considered in the model. Through the analysis of the influences of well spacing,wellbore storage coefficient,skin factor and the outer boundary of the reservoir to the bottomhole pressure response of observation well,it is held that the skin factor of excitation well and the wellbore storage coefficient of the observation well can be neglected in establishing the model; the greater the wellbore storage coefficient of excitation well and the skin factor of observation well,the later the observation well receives the signal from the excitation well,but the influence will decrease with increase of the distance between the observation well and the excitation well; whether the outer boundary of the reservoir is closed, constant pressure or infinite,the pressure derivative curves of the excitation well and the observation well will coincide after enough long time,according to which,the interference signal of different wells can be distinguished. An application case shows the correction and the practicability of the model.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2013年第6期67-72,10,共6页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中央高校基本科研业务费专项资金资助项目(编号:11CX04023A)
关键词
流线
干扰试井
压力响应
数值试井
streamline
interference well test
pressure response
numerical well test
作者简介
吴明录（1978-），男，博士后，副教授，硕士生导师，主要从事数值试井和油藏数值模拟方面的研究．E-mail：w97612@163．com
