波阻抗反演在煤炭资源勘探中的应用
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摘要
测井约束波阻抗反演是以测井资料作为约束条件,将反映构造形态的地震资料转化为反映地层岩性特征的波阻抗资料。基于模型的波阻抗反演流程包括5项:测井资料处理,层位解释,子波提取,合成记录制作与层位标定,模型建立与修正。该项技术应用于成庄煤矿和大佛寺井田采区三维地震资料解释,其中预测大佛寺井田4煤层的厚度与实际揭露厚度基本吻合;在成庄煤矿,与常规地震剖面仅有两个同相轴相比,9煤和厚15煤在波阻抗剖面上不仅有清晰的反映,而且T3波与T15波之间有多个层位呈现,其纵向分辨率明显提高;另外该区9煤沿层波阻抗切片与沿层振幅切片相比,前者可准确地划分出煤层厚度变化范围及无煤区。结合测井约束反演方法的特点,对煤炭资源勘探中的相关问题进行了讨论,提出在实际应用中应注意的问题。
The impedance inversion is based on accurate formation interpretation,definition and comparison,combined both high vertical resolution of logging data and high horizontal resolution of seismic data,is the method computing impedance related to lithology difference and getting impedance section.This paper introduces its principle and obtains some impedance sections used coal seismic data.At last,some problems about coal exploration are discussed,including coal thickness prediction,improving vertical resolution and detectability of coal reflections.
The impedance inversion is based on accurate formation interpretation,definition and comparison,combined both high vertical resolution of logging data and high horizontal resolution of seismic data,is the method computing impedance related to lithology difference and getting impedance section.This paper introduces its principle and obtains some impedance sections used coal seismic data.At last,some problems about coal exploration are discussed,including coal thickness prediction,improving vertical resolution and detectability of coal reflections.
引文
[1]张永刚.地震波阻抗反演技术的现状和发展[J].石油物探.2002,41(4):385-390.
[2]张超英,周小鹰,董宁.测井约束的地震反演在鄂尔多斯盆地大牛地气田的应用[J].地球物理学进展.2004,19(4):910-917.
[3]靳军,谈继强,李天明,支东明,宁良.应用测井约束反演开展储集层砂体描述[J].新疆石油地质.2003,24(1):73-74.
[4]多井测井约束反演薄互层储集体技术研究[J].大庆石油地质与开发.2004,23(3):87-88.
[5]唐湘蓉,谭仲平.塔河4区碳酸盐岩储层测井约束反演预测[J].断块油气田.2005,12(3):13-15.
[6]林建东,霍全明,吴奕峰.多井约束三维地震反演技术在煤厚预测中的运用[J].中国煤田地质.2003,15(3):43-45.
[7]杨立强.测井约束地震反演综述[J].地球物理学进展.2003,18(3):530-534.
[2]张超英,周小鹰,董宁.测井约束的地震反演在鄂尔多斯盆地大牛地气田的应用[J].地球物理学进展.2004,19(4):910-917.
[3]靳军,谈继强,李天明,支东明,宁良.应用测井约束反演开展储集层砂体描述[J].新疆石油地质.2003,24(1):73-74.
[4]多井测井约束反演薄互层储集体技术研究[J].大庆石油地质与开发.2004,23(3):87-88.
[5]唐湘蓉,谭仲平.塔河4区碳酸盐岩储层测井约束反演预测[J].断块油气田.2005,12(3):13-15.
[6]林建东,霍全明,吴奕峰.多井约束三维地震反演技术在煤厚预测中的运用[J].中国煤田地质.2003,15(3):43-45.
[7]杨立强.测井约束地震反演综述[J].地球物理学进展.2003,18(3):530-534.
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