摘要
随着煤层气田开发程度逐渐深入,煤储层物性定量表征与评价对煤层气规模开发愈发重要。为解决常规煤储层物性表征技术存在的尺度局限性,采用了核磁共振(Nuclear Magnetic Resonance Technology,NMR)和X-CT(Computed Tomography,X-CT)扫描等技术,实现了煤储层孔裂隙的跨尺度、原位态及完整性表征,为准确获取煤储层孔裂隙等物性参数提供新途径。研究依托神府区块中低阶煤和柿庄南区块高阶煤样品,开展核磁共振和CT扫描实验,快速、准确、定量地获得了煤储层孔隙类型、孔径分布、孔隙连通性、有效孔隙度和孔裂隙空间配置等煤储层物性参数,形成了一套可应用于不同煤阶煤储层物性定量表征的分析技术。
With the increasing development of coalbed methane(CBM)field,the quantitative characterization and evaluation of coal reservoir physical properties is becoming more and more important to CBM scale development.In order to solve the limitations of conventional methods for testing coal reservoir physical properties,the authors used the high-tech technologies such as nuclear magnetic resonance technology and CT scanning technology to effectively solve the problems of in-situ and integrity of rock samples and acquire the porosity and permeability.Nuclear magnetic resonance and CT scanning experiments of coal samples were carried out to rapidly obtain the pore type,pore size distribution and connectivity,effective porosity,spatial distribution of pore fissures and other refined coal reservoir physical parameters,based on the samples of middle and low rank coal in Shenfu block and high rank coal in Shizhuangnan block.So a set of quantitative characterization analysis technology that can be applied to coal reservoirs with different coal rank was formed.
作者
郭广山
邢力仁
李昊
GUO Guangshang;XING Liren;LI Hao(New Energy Research Center,CNOOC Research Institute,Beijing 100028,China)
出处
《中国地质调查》
2020年第6期103-108,共6页
Geological Survey of China
关键词
煤储层物性
核磁共振
CT扫描
神府区块
柿庄南区块
physical properties of coal reservior
NMR
CT scan
Shenfu block
Shizhuangnan block
