地震多属性拟测井多参数反演预测煤层顶底板岩石赋水性研究
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摘要
通过实例介绍利用地震多属性与测井成果联合反演,获得表征煤层顶底板岩石赋水性强弱的拟测井参数体,进而对其进行赋水性分析:首先利用伽马-伽马测井及视电阻率曲线重构岩石视孔隙度曲线,以获得研究区岩石视孔隙度成果;利用测井成果合成地震记录进行精细的地震地质层位标定及采区地震数据的保幅、保真处理;在测井成果约束下进行地震多属性拟测井多参数反演,利用反演成果的高低异常区评价煤层顶底板赋水强弱分区——低波阻抗、低电阻率、高孔隙度分布的区域对应赋水性强的区域,反之为赋水性弱的区域。
Introduced using seismic multiattribute and well logging result and combined with inversion to obtain pseudolog parameter mass can characterize coal roof and floor rock aquosity,and then proceed to carry out aquosity analysis.Firstly using the gamma-gamma log and apparent resistivity curve to reconstruct rock apparent porosity curves and obtain study area rock apparent porosity results.Using logging result synthetic seismic records carry out precise seismic-geologic horizon demarcation and winning district seismic data preserved amplitude and fidelity process.Under the restriction of logging results carries out seismic multiattribute pseudolog multiparameter inversion,and using high and low abnormal places from inversion results to evaluate coal roof and floor rock aquosity partition: the regions with low natural impedance,low resistivity and high porosity are corresponding to strong aquosity area,on the other hand weak aquosity area.
Introduced using seismic multiattribute and well logging result and combined with inversion to obtain pseudolog parameter mass can characterize coal roof and floor rock aquosity,and then proceed to carry out aquosity analysis.Firstly using the gamma-gamma log and apparent resistivity curve to reconstruct rock apparent porosity curves and obtain study area rock apparent porosity results.Using logging result synthetic seismic records carry out precise seismic-geologic horizon demarcation and winning district seismic data preserved amplitude and fidelity process.Under the restriction of logging results carries out seismic multiattribute pseudolog multiparameter inversion,and using high and low abnormal places from inversion results to evaluate coal roof and floor rock aquosity partition: the regions with low natural impedance,low resistivity and high porosity are corresponding to strong aquosity area,on the other hand weak aquosity area.
引文
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[3]DavidM,Jan H.Porosity p redicti on from seismic inversi on,lavrans field,halten terrace,Nor way[J].The Leading Edge,2000,21(4):392-399.
[4]卜庆林,陈成星,杨成超,等.煤层顶板岩层富水性分区指标及其涌水量预测[J].山东大学学报,2005,24(3):28-31.
[5]黄作华.煤田测井方法与数字处理[M].北京:煤炭工业出版社,1982:199-200.
[6]刘向君,周改英,陈杰.基于岩石电阻率参数研究致密砂岩孔隙结构[J].天然气工业,2007:1-3.
[7]张宁,韩洪德,刘晓晨,等.地震波CT技术在煤矿采空区探测中的应用[J].河北工程大学学报(自然科学版),2008,25(3).
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