产量不稳定法识别复杂地质沟槽  

IDENTIFICATION OF COMPLICATED GEOLOGIC GROOVES WITH PRODUCTION TRANSIENT METHOD

作　　者：王少军[1] 何顺利[1] 李秀生[1] 吴正[2] 晏宁平[2] 

机构地区：[1]中国石油大学石油工程学院,北京102200 [2]长庆油田公司第一采气厂,陕西靖边718500

出　　处：《大庆石油地质与开发》2009年第3期23-26,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油股份有限公司项目（06A100103）资助.

摘　　要：靖边气田下古气藏为奥陶系碳酸盐岩风化壳储层，具有显著的喀斯特地貌特征，存在大量冲蚀沟槽。这些沟槽对天然气富集具有一定的控制作用，并对钻井成功率以及气井稳产造成很大的影响。精细描述沟槽产状，对气田开发工作具有指导意义。一般识别沟槽的动态方法采用探边测试，但目前靖边气田仅有少数气井进行了试井，其余大量气井因为生产任务紧张无法进行探边测试。利用产量不稳定法分析气井的日常生产数据，以地震、地质的研究成果为基础，动、静结合精细识别沟槽的结果与试井解释结果对比表明，方法具有较高的符合率。该方法在靖边气田大部分生产井上得到应用，不但验证了部分沟槽，还发现了一批新沟槽，为靖边气田下古气藏的精细描述提供了动态依据。Lower Paleozoic gas reservoir in Jingbian Gas Field belongs to Ordovician weathering crust carbonate reservoir with obvious Karstic geomorphic features appearing as many eroded grooves. These eroded grooves have controlling effect on natural gas accumulation and have much effect on success ratio of well drilling and the stable production of gas well. Fine description of groove shape has significance to guide development of gas field. Reservoir limit testing technique is usually used for identification of grooves. At present, well test is performed for a few gas wells in Jingbian Gas Field because of intense production task. So, through the combination of production transient method used to analyze daily production data of gas well , and seismic ＆geologic study, fine identification of fluting can be realized, which coincides with well test interpretation fundamentally. The method has been applied for most producers in Jingbian Gas Field, not only verifies partial flutings but also discovers new flutings. There- fore, it can offers dynamic foundation for fine description of sub-paleo gas reservoir in Jingbian Gas Field.

关 键 词：气藏 动态 沟槽 识别 产量不稳定法 试井 

分 类 号：TE121[石油与天然气工程—油气勘探]