测井曲线在济阳坳陷中生界地层划分中的应用
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摘要
针对济阳坳陷中生界地层纵向变化大,内部结构复杂,内幕地震表现不清晰,钻井揭露程度低,古生物化石稀少,传统的生物地层划分难度很大,储层识别困难的状况,以岩心分析资料为基础,将层内差异法、极值点法、最大斜率法、最优分割法等方法有机结合,综合运用各种测井资料,实现井剖面地层的自动划分。应用所开发的软件对研究区10多口井的资料进行了处理,取得了良好的地质效果。该方法为缺少古生物化石数据的中生界地层划分提供一种新的思路。
Because the formation of Mesozoic group in Jiyang depression is characterized by great vertical changes, complex inner structures, obscure seismic reflection, low reveal of drilling and little obiological fossil , the traditional zonation of biostratigraphy and reservoir recognition are both difficult. Based on core analysis and combined with the intraformation discrepance method, the extreme value point method, the maximum slope method and the optimum partition method, we use all kinds of logging data to automatically classify strata profiles. Log data of more than ten wells in the depression have been processed with the newly developed software,result of which is better. This method provides a new idea to the zonation or classification of the Mesozonic formation that lacks obiological fossil data.
Because the formation of Mesozoic group in Jiyang depression is characterized by great vertical changes, complex inner structures, obscure seismic reflection, low reveal of drilling and little obiological fossil , the traditional zonation of biostratigraphy and reservoir recognition are both difficult. Based on core analysis and combined with the intraformation discrepance method, the extreme value point method, the maximum slope method and the optimum partition method, we use all kinds of logging data to automatically classify strata profiles. Log data of more than ten wells in the depression have been processed with the newly developed software,result of which is better. This method provides a new idea to the zonation or classification of the Mesozonic formation that lacks obiological fossil data.
引文
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[2]赵永军,李汉林.石油数学地质[M].东营:石油大学出版社,1998.
[3]王学仁.地质数据的多变量统计分析[M].北京:科学出版社,1986.
[4]李公时,谢国柱.数学地质教程[M].南京:中南工业大学出版社,1989.
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