摘要
随着我国天然气勘探开发的不断深入,复杂难开采的低品味储量比重不断上升,经济有效开发难度逐步加大。水平井技术是降低单位产能建设投资、提高开发效益的最有效手段之一,为此统计并分析了水平井在我国5种主要类型气藏开发应用中的经验教训,指出:水平井是经济开发低渗透砂岩气藏的有效方法,地质条件适应性是成功开发的关键;火山岩气藏Ⅰ类储层中的水平井开发是成功的,Ⅱ、Ⅲ类储层表现出一定的不适应性;疏松砂岩气藏水平井开发效果呈现出Ⅰ类好于Ⅱ类、Ⅱ类好于Ⅲ类的特征;准确钻遇有效储集层是水平井开发碳酸盐岩气藏的关键;水平井开发凝析气藏效果较好。同时结合水平井技术的特点和实践经验,总结了该技术在气藏开发中的使用条件,并建议今后应持续开展水平井储层适应性、配套技术研发及经济效益分析工作。
In China, the proportion of low-quality reserves (complicated and difficult to be recovered) is rising constantly along with a deep development of gas E & P. So, it ’ s very difficult to have an economic and effective exploitation. At present, horizontal-well technology is one of the most effective tools to not only reduce an investment of productivity construction but also increase development benefits. This study presents and analyzes some experiences and lessons from the application of horizontal-well technology to five kinds of reservoir. In addition, it points out that: (1) horizontal-well technology is one of the most effective tools to economi cally exploit sandstone gas reservoirs with low permeability, and the most important is an adaptability of geological condition; (2) for volcanic-rock gas reservoirs, the application of horizontal-well technology to I type reservoir is successful whereas a certain inadaptability may appear in both II and III type; (3) for loose sand stone gas reservoirs, its application to I type is better than that to II type, and II type better than III type; (4) for carbonate gas reservoirs, the most important to the technology is effective reservoir to be accurately drilled; and (5) for condensate gas reservoirs, the technology ’ s effect is better. Moreover, its application conditions are summed up based on characteristics and experiences of horizontal-well technology. At last, some suggestions on analysis are made, including for the adaptability of horizontal-well reservoir, the research and development of matching technologies and the economic benefits.
出处
《天然气技术与经济》
2011年第1期24-27,77-78,共4页
Natural Gas Technology and Economy
基金
中国石油科技部2008B-1101<特殊天然气藏开发技术应用基础研究>
关键词
水平井
天然气藏
适应性
发展建议
综述
horizontal well, gas reservoir, adaptability, development suggestion, review
