榆林南区下古气产能评价研究.pdfVIP

摘 要 榆林气田南区下古生界气层由于开发时间较短，对地层地质认识 和产能状况研究薄弱。评价下古生界地层地质特征、储量大小和产能 特征及产能的影响因素，并形成规律性的认识已成为榆林气田南区的 重要攻关目标。 本文以榆林气田南区下古生界奥陶系马家沟组地层为主要研究 层位，从研究地质特征入手，根据沉积微相的特点和划分标志，划分 沉积微相，分析主要成岩作用类型及其建设和破坏性作用，并研究储 层的层内、层间和平面非均质性；优选适合于本区的动储量计算方法； 对系统试井资料和单点法测试数据进行解释，建立气井的产能方程； 动静结合，从沉积微相、成岩相和储层非均质性等方面结合气藏动态 特征分析影响气井产能的因素；结合产能影响因素分析，根据动储量 和无阻流量的大小，对工区内的气井进行分类评价。 关键词： 产能 影响因素 动静结合 动态储量 I ABSTRACT It has not been a long time since the development of Yulin gas field, so we don’t have a good clue on its geological characteristics and the deliverability. It is very important to develop the research on geological characteristics、dynamic reserves and influncing factors on deliverability. The Ordovician is the main target formation,it has seven sedimentary microfacies in Yulin, the diagenic metamorphism types and reservoir heterogeneity are given. Two methods are used to work out the gas reservoir dynamic reserves. After the study on step rate test, binomial deliverability equation and absolute open flow potential are calculated. Single point empirical equation is used to get the other well’s open flow potential. Take the dynamic and static factors into account, the sedimentary microfacies 、the diagenic metamorphism types and the reservoir heterogeneity are the most important ones. Meanwhile, the gas wells have three performance types based on the dynamic reserves and absolute open flow potential. Keywords ：deliverbility ；influncing factors ；dynamic and static ；dynamic reserves II 第1 章 前言 第1 章 前 言 天然气是重要的矿产资源之一，也是主要的清洁能源。据市场调 [1]