长庆气田下古生界气藏地层压力评价技术  

Technology of Formation Pressure Evaluation of Lower Paleozoic Gas Reservoir of Changqing Gasfield

作　　者：何丽萍[1] 张建国[1] 王东旭[1] 张雅玲[1] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院

出　　处：《低渗透油气田》2008年第3期82-86,共5页

摘　　要：长庆靖边气田下古生界气藏属于大面积低渗透、岩性一地层圈闭气藏，侵蚀沟谷分布复杂、储层非均质性强，这种强非均质性气藏的地层压力分析具有很大难度。针对靖边气田实际情况，结合现有测试和生产动态资料，提出了适合于评价靖边气田下古生界气藏单井泄流区地层压力的方法。经过大量的计算实例检验，本文所提出的方法计算误差均控制在10％以内，能够满足工程计算的需要，同时该方法简捷、极易现场实施。Lower Paleozoic gas reservoirs of Changqing Jingbian gasfield belong to large-area, low permeability, lithologic - stratigraphic trap gas reservoirs, with complex distribution of erosion gullies. The reservoir heterogeneity is strong. It is very difficult to analyze the formation pressure of the strong heterogeneous gas reservoirs. According to the actual situation of the Jingbian gasfield, combined with the existing test and dynamic production data, the authors put forward a method suitable to evaluate the formation pressure of individual well discharge area of Jingbian Lower Paleozoic gas reservoirs. After testing a large number of examples of calculation, the calculation errors put forward in the paper are controlled within 10%. It can meet the engineering computation needs, at the same time with a simple method and easy to implement on-site.

关 键 词：靖边气田 地层压力 压降曲线 产能方程 

分 类 号：TE271[石油与天然气工程—油气井工程]