摘要
含气量是页岩气勘探评价及生产决策中的关键性基础参数,大三段式现场含气量解吸是准确、经济、快捷的首选方法。有别于煤层气思路,页岩含气量在测试原理、方法、技术及仪器等方面均取得了重要进展。无管化测试技术和小三段式测量方法的提出和应用,在提高解吸气测试精度的同时提供了更多有价值的信息。从借鉴于煤层气的条件回推法到多点测量约束拟合法,页岩损失气测量方法更加摆脱了对假设条件的依赖。基于非接触式扭矩传递的方法原理,实现了残余气测试过程中的全程气密。双三段式的含气量准确测量,为总含气量、游吸比、可采系数等含气结构参数的分析和求取奠定了基础,但页岩的可采气量并不是损失气和解吸气的简单加和。高精度含气量现场解吸的应用领域广泛,高精度解吸数据的系统获得、含气结构多参数的预测评价、智能评价技术的实践应用等,是页岩含气量现场解吸发展的基本方向。
Gas content is a key parameter for shale gas evaluation and production decision-making,while on-site determination of desorption gas content using“large three-stage”desorption curves is preferred based on accuracy,cost,and speed considerations.Different from coalbed methane,shale gas content analysis has made significant progress in testing methodologis,methods,technologies,and instruments.The adaptation of pipeless testing technology using“small three-stage”desorption curves provides more valuable information while improving the accuracy of desorption gas testing.From conditional extrapolation,borrowed from coalbed methane,to multi-point constraint fitting,shale gas loss can now be calculated with less dependency on assumptions.Based on the principle of non-contact torque transmission,whole-process air sealing during residual gas testing has been achieved.Accurate gas content measurement using dual three-stage desorption curves lays the foundation for calculating key parameters such as total gas content,free/absorption ratio,and recoverable coefficient.However,the total recoverable shale gas is not simply the sum of lost and desorbed gases.High-precision,on-site desorption gas content analysis has wide applications.Its development directions include systematic high-precision data acquisition,mult-parameter evaluation,and intelligent-evaluation technology application.
作者
张金川
王香增
李中明
刘树根
牛嘉亮
袁天姝
李兴起
唐玄
ZHANG Jinchuan;WANG Xiangzeng;LI Zhongming;LIU Shugen;NIU Jialiang;YUAN Tianshu;LI Xingqi;TANG Xuan(School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China;Key Laboratory for Strategic Evaluation of Shale Gas Resources,Ministry of Natural Resources,Beijing 100083,China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075,China;Henan Geological Research Institute,Zhengzhou 450016,China;Xihua University,Chengdu 610039,China)
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2024年第1期315-326,共12页
Earth Science Frontiers
基金
国家自然科学基金项目(41927801)
云南省重大专项(202302AF080001)
云南省重点研发计划项目(202303AA080006)。
关键词
页岩气
含气量
含气结构
技术进展
发展趋势
shale gas
gas content
gas-bearing structure
technical progress
development tendency
