摘要
钻井取心是研究地下地质情况的直接资料,但钻井时为节省成本,通常采用非定向取心技术,无法确定准确的岩心深度和方位信息,为了充分利用岩心资料进行科学研究,需要用测井资料对其进行深度归位和方位定向。通过阐述成像测井地质构造识别原理,结合岩心空间归位方法和评定标准,利用成像-岩心扫描图像综合处理软件,比对岩心与成像测井资料,完成了GW-1、GW-2及XL2井1 093块岩心图像的空间归位工作,列出了部分井段的归位实例,并将每块岩心按AA、AB、AC、BB、BC和CC 6个等级进行空间归位质量分级,对空间归位的整体效果进行分析。结果表明,岩心深度误差随井深的增加逐渐增大;空间归位质量为AA级、AB级的岩心占总数63.2%,总体质量较高,为进一步地质构造分析奠定了基础。
Drilling core is a significantly important technology to obtain the direct data of underground geological conditions.However,due to the cost control reason,people usually use the no-directional coring method which the accurate information of depth and orientation cannot be identified.In order to sufficiently use the core data for scientific research,logging data is used to restore the depth and orientation of the core,namely core spatial restoring.In this paper,core spatial restoring of 1093pieces of cores in borehole GW-1,GW-2and XL2are accomplished through elaborating the geological structure identification theory of imaging logging,combining with the method of core spatial restoring and evaluation standard,using imaging-core scanning image processing software,and comparing the core data with the imaging logging data.Moreover typical examples of these wells are showed,quality classification of six grades（AA,AB,AC,BB,BC,CC）is achieved for each core,and the overall effect of core spatial restoring is analyzed in this paper.The results show that,the depth error is increasing with logging depth;the cores of AA and AB quality make up over 70% of the total,core spatial restoring is relatively high quality,and the solid foundation is laid for the further geological tectonic analysis.
出处
《地质科技情报》
CAS
CSCD
北大核心
2014年第4期207-212,共6页
Geological Science and Technology Information
基金
国家科技重大专项课题"我国油气勘探开发工程技术和装备发展战略研究"(2011ZX05043-003)
中国石油重大科技专项研究课题"鄂尔多斯盆地致密油开发方式和技术政策研究"(2011E-2602-4)
关键词
成像测井
岩心空间归位
质量分级
深度误差
imaging logging
core spatial restoring
quality classification
depth error
