受孔隙形态影响的碳酸盐岩孔隙度反演

发布时间：2018-01-09 01:03

本文关键词：受孔隙形态影响的碳酸盐岩孔隙度反演　出处：《地球物理学进展》2017年01期 　论文类型：期刊论文

【摘要】：深层碳酸盐岩往往具有孔隙度低,孔隙形态复杂的特点.传统孔隙度反演方法仅考虑孔隙空间大小对地层岩石物性的影响,未考虑孔隙形态对岩石弹性特征的作用,在反演深层碳酸盐岩孔隙度时往往存在偏差.孔隙形态的影响可以利用含有孔隙纵横比的等效介质模型表示;通过引入DEM模型对声波孔隙度方程进行改进,定量体现孔隙形态的影响.将改进的声波反演与中子反演、密度反演相结合,得到井区受孔隙形态影响的地层孔隙度.首先利用中子、密度和纵波时差反演得到地层孔隙度初值;进而通过DEM公式获得孔隙纵横比初值;最后综合利用中子测井、密度测井和声波测井数据,实现受孔隙纵横比影响的地层孔隙度反演.应用该方法反演了西南某地MX19井深层白云岩储层的孔隙度,通过与岩心孔隙度测量数据进行对比,验证了反演结果的准确性.
[Abstract]:Deep carbonate rocks often have low porosity and pore morphology characteristics of the complex. The traditional porosity inversion method only affects the pore size on the formation of rock physical considerations, without considering the effect of pore morphology on rock elastic characteristics, inversion of porosity in deep carbonate rocks are deviation. Effect of pore morphology can be used with equivalent medium model the pore aspect representation; through the introduction of DEM model of acoustic porosity equation was improved, quantitatively reflect the effect of pore morphology. The improved acoustic inversion and neutron inversion, density inversion combined well by pore morphology influence the porosity. The neutron density and compressional wave slowness inversion and initial porosity; the initial pore aspect ratio by DEM formula; finally, the comprehensive utilization of neutron logging, density logging and acoustic logging data, realize Inversion of formation porosity influenced by pore aspect ratio is applied to retrieve the porosity of deep dolomite reservoir in well MX19, Southwest China. The accuracy of inversion is verified by comparison with core porosity data.

【作者单位】：中国石油勘探开发研究院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”子课题《海相碳酸盐岩储层地震描述与油气藏有效预测技术研究》(2011ZX05004-003) 国家自然科学基金《基于波动理论的储层弹性参数反演及多尺度表征》(41504110)提供的科研资助
【分类号】：TE311
【正文快照】： 中国石油勘探开发研究院,北京100083Petro China Research Institute of Petroleum ExplorationDevelopment,Beijing 100083,Chinadoi:10.6038/pg201701200引言碳酸盐岩地层沉积条件复杂,受构造、剥蚀等作用影响次生孔隙发育,孔隙形态复杂(Scholle and Ulmer-Scholle,2003;邹

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