基于多测井数据的重构技术在约束反演中的应用
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摘要
在约束反演中,不同的重构技术已广泛用于测井声波曲线,其中多数方法是基于单一测井曲线,构造一条用于合成地震记录的反演约束曲线,方法上不太合理,没有真正反映储层的特征。为此,提出基于多种测井数据构造波阻抗曲线的重构技术,同时讨论了该技术在不同地区、不同测井曲线的重构加权系数取值范围,分析了不同加权系数获得的反演效果。应用该技术重构的波阻抗曲线能真正反映储层的特点,提高了波阻抗反演剖面的分辨率,显著改善了对储层的描述和预测能力。通过在某区块的实际应用,取得了好的效果,表明该方法是一种简单、实用、有效的曲线重构技术。在井资料丰富的地区,应用该技术能够取得更好的储层描述及预测结果,并为储层约束反演提供了一个值得借鉴的声波曲线重构思路。
Various reconstruction techniques have been widely applied to acoustic logs in constrained inversion,and most of the methods rely on single well log to construct an inversion-constraining curve for a composite seismogram which are not rational in approaches and cannot reflect the actual reservoir features. This paper presents a reconstruction technique which constructs acoustic impedance curves based on various logs,discusses the ranges of reconstruction weighting factors at different regions and for different well logs,and analyzes the effects of inversion with different weighting factors. The acoustic impedance curves reconstituted with this technique can represent the real features of the reservoirs. In addition,it can significantly enhance the resolution of acoustic impedance inversion profile and the capability of reservoir description and prediction. Practical application of this technique in one block is very successful,indicating that it is a simple,practical and effective reconstruction technique. In areas with abundant well data available,this technique can better describe and predict reservoirs,and provides a useful approach of acoustic log reconstruction for constrained reservoir inversion.
Various reconstruction techniques have been widely applied to acoustic logs in constrained inversion,and most of the methods rely on single well log to construct an inversion-constraining curve for a composite seismogram which are not rational in approaches and cannot reflect the actual reservoir features. This paper presents a reconstruction technique which constructs acoustic impedance curves based on various logs,discusses the ranges of reconstruction weighting factors at different regions and for different well logs,and analyzes the effects of inversion with different weighting factors. The acoustic impedance curves reconstituted with this technique can represent the real features of the reservoirs. In addition,it can significantly enhance the resolution of acoustic impedance inversion profile and the capability of reservoir description and prediction. Practical application of this technique in one block is very successful,indicating that it is a simple,practical and effective reconstruction technique. In areas with abundant well data available,this technique can better describe and predict reservoirs,and provides a useful approach of acoustic log reconstruction for constrained reservoir inversion.
引文
[1]刘成鑫,李龙滟,王青春.波阻抗数据体在储层预测中的应用[J].江汉石油学院学报,2002,24(1):20-22.
[2]吴大奎,唐必锐,覃发兰,等.地震资料储层预测反演方法应用研究[J].天然气工业,2004,24(10):38-40.
[3]张学芳,董月昌,慎国强,等.曲线重构技术在测井约束反演中的应用[J].石油勘探与开发,2005,32(3):70-72.
[4]张静,陈启林,李延丽.测井曲线重构技术在储层预测中的应用[J].西北油气勘探,2005,17(4):47-52.
[5]杨少虎,黄玉生,彭文绪,等.声波重构技术在储层反演中的应用[J].石油地球物理勘探,2006,41(2):171-176.
[6]于文芹,邓葆玲,周小鹰.岩性指示曲线重构及其在储层预测中的应用[J].石油物探,2006,45(5):482-486.
[7]刘淑华,张宗和,刘建武,等.声波曲线重构反演技术在储层预测中的应用[J].天然气工业,2007,27(增刊A):394-396.
[8]杨建春,刘赐团.拟声波曲线构建技术的新进展[J].内蒙古石油化工,2004,30(增刊1):129.
[2]吴大奎,唐必锐,覃发兰,等.地震资料储层预测反演方法应用研究[J].天然气工业,2004,24(10):38-40.
[3]张学芳,董月昌,慎国强,等.曲线重构技术在测井约束反演中的应用[J].石油勘探与开发,2005,32(3):70-72.
[4]张静,陈启林,李延丽.测井曲线重构技术在储层预测中的应用[J].西北油气勘探,2005,17(4):47-52.
[5]杨少虎,黄玉生,彭文绪,等.声波重构技术在储层反演中的应用[J].石油地球物理勘探,2006,41(2):171-176.
[6]于文芹,邓葆玲,周小鹰.岩性指示曲线重构及其在储层预测中的应用[J].石油物探,2006,45(5):482-486.
[7]刘淑华,张宗和,刘建武,等.声波曲线重构反演技术在储层预测中的应用[J].天然气工业,2007,27(增刊A):394-396.
[8]杨建春,刘赐团.拟声波曲线构建技术的新进展[J].内蒙古石油化工,2004,30(增刊1):129.
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