含节流器气井生产动态分析方法.pdf

天然气勘探与开发
2017年3月出版
含节流器气井生产动态分析方法
许珍萍2范继武2孙岩岩2葛静涛李志超2
1.中国石油长庆油田公司苏里格气田研究中心2.低渗透油气田勘探开发国家工程实验室3.中国石化华东油气分公司
摘要鄧尔多斯金地苏里格气田单井普遍采用井下节流工艺生产,但井下节沆技术给气田常规动态监测和气井动态分析带
来较大困难,现有常规方法已难以解决节流气井的动态分析问題。通过分析含节流器气井流动的理论和实际生产曲线的特征后认
为:含节流器气井早期具有明显的临界流特点,生产后期则具有明显的亚临界流特点,进而基于气井不同生产时期试井测试资料
的系统研究,提出含节流器气井的试井解释具有气井早期临界流时以高表皮为主要特征、气井晚期亚临界流时以高井储为主要特
征的新认识,并以此提出“等效表皮系数”方法,研究节流器对气井不同生产时期的影响,建立了含节流器气并动态分析方法
应用 Topaze软件进行含节流器气井的生产动态拟合,经对比表明该方法具有较高的准确性、可靠性,为含节流器气井的动态分
析提供了新的方法参考和技术支持。
关键词动态分析试井分析井下节流表皮系数苏里格气田鄂尔多斯盆地
A new method for analyzing production performance of gas wells equipped
with chokes
Xu Zhenping:2, Fan Jiwu 2, Sun Yanyan", Ge Jingtao,', Li Zhichao
(. Sulige Gasfield Research Center, Petro China Changing Oilfield Company, Xi'an, Shaanxi 710078, China,
2. National Engineering Laboratory of Low-permeability Oil Gas Exploration and Development, xi'an, Shaar
710018, China; 3. Sinopec East China Compamy Nanjing iangsu 210011, China)
Abstract: The technology of downhole throttling is widely used in Ordos Basin in Sulige Gasfield, but it leads to difficulties in the
conventional dynamic monitoring of gas fields and the performance analysis of gas wells. It is difficult to analyze the production
performance of gas wells equipped with chokes by using the existing conventional methods. In this paper, the flowing theories of gas
wells equipped with chokes and their characteristics of actual production curves were analyzed. It is indicated that in the gas wells
equipped with chokes, obvious features of critical flow are presented at the early stage of its production and obvious features of sub-
critical flow are presented at the late stage. Then, the well test data of gas wells in different production stages was investigated system
atically. It is newly understood that the well testing interpretation of gas wells equipped with chokes is mainly characterized by higher
skin factor in the early critical flow while higher wellbore storage in the later subcritical flow. Accordingly, the method of"equivalent
skin factor "was proposed to study the effects of chokes on gas wells in different production stages. Finally, the performance analysis
method for gas wells equipped with chokes was developed, and the production performance of gas wells equipped with chokes was
fitted by using TOPAZE software. It is indicated that this method is highly accurate and reliable, and it provides the new reference and
technical support for the performance analysis of gas wells equipped with chokes
Keywords: Performance analysis; Well test analysis; Downhole throttling; Skin factor; Sulige Gasfield; Ordos Basin
历经8年的规模建设,鄂尔多斯盆地苏里格气态分析方法研究十分必要
田己形成年产气量超200亿立方米大型气田,目前
投产气井800余口リ,其中超过5%气井以井下1节流气井生产特征分析
节流方式生产。由于气井井筒存在节流器,所获得
的气田动态监测资料无法用常规的单井动态分析方1节流气井流动状态
法进行分析。因此,深入开展含节流器的生产动
气体通过节流器流动(图1),主要分为两种状
第一作者简介:许珍萍,女,1986年生,工程师,硕士:主要从事气田动态技术研究工作。地址:(710018)陕西省西安市未央
区凤城四路73号苏里格大厦。电话:(029)86978211E-mail:xuzhenping2@163.com,cn
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