多层螺旋CT三维成像技术岩心裂缝观测

Observing core fissures with multiple helical CT technology

张军 孟英峰 李皋 李永杰 杨从武

西南油气田分公司勘探事业部，四川 成都 610041 油气藏地质及开发工程国家重点实验室，西南石油大学，四川 成都 610500 川西钻探公司，四川 成都 610500

储层裂缝研究是裂隙性油气田勘探开发的一个难点。图像重建是多层螺旋CT技术的主要优势功能之一，它集显微技术、高速激光螺旋分层扫描技术和图像处理技术为一体，在现代临床医学诊断中有着重要的应用，近年来CT技术在石油地质及开发研究中的应用日益增加。选取具有代表性的含裂缝岩心，利用多层螺旋CT机对岩心裂缝进行扫描，把获得的储层含裂缝岩心的图像容积数据导入CT-3D工作站，利用设备附带的图像分析处理软件，对导入数据进行三维立体成像，来探讨多层螺旋CT三维成像技术在储层岩心裂缝研究中的应用价值。实验结果表明，多层螺旋CT成像技术能够实现对储层裂缝形态的定性观察和定量测量，具有原位、快捷、准确、无损岩样等特点，是观测、描述、评价储层岩心裂缝形态的一种新的有效方法。

Reservoir fracture research is a difficult point for exploration and development of fractured reservoirs. The image reconstruction
is an important advantage of multiple helical CT technology. It integrates microtechnique, helical creaming scanning technique of
high-speed laser and image processing technique. It is increasing to use CT technology in petroleum geology and development study
in recent years. In this paper the typical fractured cores are selected, which were scanned with multiple helical CT instrument. The
reservoir image volume data of fractured cores were transferred to CT workstation in order to conduct the 3D stereo imaging of the
introduced data through using image dissector system in the equipment to study the value of multiple helical CT with 3D
reconstruction technology in the study of core fracturesr. Experiment result indicates that the techonlogy is a effective method of
evaluating core fissures.