井约束地震反演技术在储层预测中的应用——以大庆油田杏56区块为例
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摘要
鉴于大庆长垣油田的声波测井曲线对储层与非储层的响应差异不明显,因此选择对储层反映明显的自然伽马曲线替换声波曲线,即利用相邻井的时深关系把自然伽马曲线重构成具有声波曲线量纲的新曲线。在此基础上,利用测井曲线的高频信息和三维地震资料精细、三维可视化的优点,进行井约束地震反演,对井间储层进行预测。反演结果表明,预测的井间砂体分布准确率达到了70%以上,这一反演结果可以运用到后续的储层综合建模之中,提高储层建模的准确性。
As the response difference of sonic logging curve in Daqing placanticline oilfield for reservoir and non-reservoir is not obvious, the gamma-ray curve is chosen to replace the sonic logging curve in reservoir prediction, that is, the time-depth relationship from the near wells are used to reconstruct gamma-ray curve, so the reconstructed gamma-ray curve will have dimension of the sonic logging curve. Based on the new constructed curves, by integrating the high frequency information from the logs with the 3d seismic data which can be 3d visualized in detail, well constrained inversion is conducted, and then the authors carried out the reservoir prediction. The inversion results demonstrated that the accuracy rate to predict intra-well sand bodies reached up to 70%, as a result the prediction results can be used in the following reservoir integrated modeling, so the modeling accuracy rate can be raised.
As the response difference of sonic logging curve in Daqing placanticline oilfield for reservoir and non-reservoir is not obvious, the gamma-ray curve is chosen to replace the sonic logging curve in reservoir prediction, that is, the time-depth relationship from the near wells are used to reconstruct gamma-ray curve, so the reconstructed gamma-ray curve will have dimension of the sonic logging curve. Based on the new constructed curves, by integrating the high frequency information from the logs with the 3d seismic data which can be 3d visualized in detail, well constrained inversion is conducted, and then the authors carried out the reservoir prediction. The inversion results demonstrated that the accuracy rate to predict intra-well sand bodies reached up to 70%, as a result the prediction results can be used in the following reservoir integrated modeling, so the modeling accuracy rate can be raised.
引文
[1]聂凯轩,陆正元,冯斌.测井约束反演技术在LZ21-4构造带储盖层综合分析中的应用.石油地球物理勘探,2007,42(1):98~101
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[13]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.石油勘探与开发,2005,32(3):70~72
[14]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.石油地球物理勘探,2006,41(2):171~176
[2]张明振,印兴耀,谭明友等.对测井约束地震波阻抗反演的理解与应用.石油地球物理勘探,2007,42(6):699~702
[3]张喜强,李彦强,叶明标等.多井测井约束反演薄互层储集体技术研究.大庆石油地质与开发,2004,23(3):87~88
[4]汲生珍,刘震.波阻抗反演技术在层序地层与沉积分析中的应用.石油勘探与开发,2005,32(6):66~68
[5]刘彦君,刘大锰,年静波等.沉积规律控制下的测井约束波阻抗反演及其应用.大庆石油地质与开发,2007,26(5):133~137
[6]王鑫.鄂尔多斯盆地北部低孔、低渗含气储层综合反演与描述.石油地球物理勘探,2006,41(3):290~294
[7]孙致学,凌庆珍,邓虎成等.高分辨率层序地层学在油田深度开发中的应用.石油学报,2008,29(2):239~245
[8]Layla Saleh AI Muhairi et al.Understanding a reser-voir:3D geological modeling using scenario-based ap-proach and conventional geostatistics,Onshore,USA.SPE101913,2006,1~13
[9]熊琦华,纪发华.地质统计学在油藏描述中的应用.石油大学学报(自然科学版),1995,19(1):115~119
[10]孟恩,徐刚,沈财余等.约束地震反演中测井数据的标准化及储层的精细标定.石油地球物理勘探,2005,40(2):226~232
[11]杨培杰,印兴耀.地震子波提取方法综述.石油地球物理勘探,2008,43(1):123~128
[12]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.天然气工业,2004,24(10):38~40
[13]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.石油勘探与开发,2005,32(3):70~72
[14]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.石油地球物理勘探,2006,41(2):171~176
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