含气页岩有机碳含量地球物理预测  

Total organic carbon content prediction of gas-bearing shale with geophysical methods

作　　者：许杰[1] 何治亮[1] 董宁[1] 霍志周[1] 路菁[1] 张金强[1] 李佩[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083

出　　处：《石油地球物理勘探》2013年第A01期64-68,202+7,共5页Oil Geophysical Prospecting

基　　金：国家重大专项(2012ZX05068-002)资助

摘　　要：本文以四川盆地东部JN地区侏罗系东岳庙段陆相页岩气研究为例,探讨了页岩气有机碳含量(TOC)预测的难点和存在的问题,提出针对性的有机碳含量地球物理预测技术和方法。在有机物特征和岩石物理分析基础上,论证了页岩气有机碳含量预测条件,确定了以地质统计学反演为核心的地震储层预测技术对该区进行页岩气有机碳含量预测研究。通过有机碳含量曲线构建、地震精细解释、约束稀疏脉冲波阻抗反演和地质统计学反演,较好地预测了该区有机碳含量的纵向和横向展布。通过盲井检验,预测精度达到90%以上。本文研究表明,页岩气有机碳含量地球物理识别与预测技术能较好地分辨出有机碳含量空间展布规律,为页岩气水平井开发提供有力的技术支持。According to Jurassic continental shale gas in JN area,the eastern Sichuan Basin,this paper discusses difficulties and problems in predicting total organic carbon content(TOC)of gas-bearing shale,and puts forward some geophysical prediction methods.Based on organic matter characteristics,we first discuss rock physics analysis and TOC prediction conditions,and use a geostatistical inversion to calculate TOC.Using TOC curve building,seismic interpretation,constrained sparse spike inversion and geostatistical inversion, TOC distribution in vertical and lateral are calculated.This technique is successfully applied in JN area and above 90% predictions are proved.The results show that this technique can effectively identify TOC distribution,and will support for horizontal well drilling in shale gas.

关 键 词：页岩气 有机碳含量(TOC)预测 地质统计学反演 

分 类 号：P631[天文地球—地质矿产勘探]