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时间:2020-06-04
《高分辨率层序格架约束的地震反演及应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、研究论文(Papers)科技导报2013,31(9)jF高分辨率层序格架约束的地震反演及应用曹彤。郭少斌中国地质大学能源学院,北京100083摘要在油藏勘探开发中。利用地震波阻抗反演技术预测储层空间分布特征,自应用以来发挥着非常重要的作用。特别是在油藏开发中后期。需要对薄层、薄互层等油层进一步开发时,该项技术显得尤为重要。尽管该方法以测井和地质等资料为约束,但依据传统的构造解释方法建立的初始构造模型不够准确,仍然无法降低地震反演的多解性,井间储层分布与后验井存在较大差别,预测出的薄层、薄互层及储层岩性的可信度较低。本文利用测井资料进行高分辨层序地层
2、划分,依据单井合成地震记录将划分结果标定在地震剖面上。并完成各层序界面的地震层位解释,井震结合建立高分辨率层序地层格架。结果表明。将该地层格架作为初始模型进行测井约束的地震资料波阻抗反演。对不同旋回发育的薄层或薄互层储层。横向预测不会以一套厚储层呈现,提高了储层反演预测储层分布的精度。通过大庆长垣高台子油田中的具体应用,展示了高分辨率层序地层格架约束下的波阻抗反演技术在薄层、薄互层储层预测中的广阔应用前景。关■词测井约束反演;初始模型;高分辨层序地层;薄互层储层中圈分类号TEl9文献标志码Adoi10.3981/j.issn.1000—7857.2
3、013.09.005SeismicInvcersi"onConstrainedbyHig~hll-resolutilonS~{eqDI~uenceStratigraphyFrameworkandItsApplicationsCAOTong,GUOShaobinSchoolofEnergyResources,ChinaUniversityofGeosciences,Beijing100083,ChinaAl~raetDuringthereservoirsexplorationanddevelopment,theimpedanceinversionme
4、thodbasedonseismicdatacouldbeadoptedtopredictthereservoirdistribution.Especiallyinthestageofreservoirsdevelopment,itisnecessarytoknowthethinlayerandthininterbedreservoirsdistributionandtotakemeasuresinthefurtherdevelopment.Inordertoacquireaccurateinversionresults,itisimportant
5、tobuildarefinedinitialmode1.Althoughtheimpedanceinversionisbasedonlogandgeologicaldata,theinitialmodelbuihonthetraditionalstructureinterpretationresultsisnotaccurateenough,andisunabletoreducemuhi-solutionproblemofseismicinversion.Theimpedanceinversionbasedonhigh-resolutionsequ
6、encestratigraphyframeworkhasbeenintroduced.Firstlythehigh—resolutionsequencestratigraphyclassificationresultscouldbecalibratedintheseismicprofilebythesyntheticseismogram.Theneverysequenceinterfacemustbeinterpretedintheseismicprofile.Astothesequenceinterfacethatdoesnothavetheco
7、rrespondingseismicwaveinseismicprofile,itcouldbetracedaccordingtotheloggingdata.Theinitialmodelforthelog—constrainedimpedanceinversionhasbeenconstructedonthebasisoftheinterpretationofhigh—resolutionsequenceframework.Finallythereservoirsdistributionisabletoberequiredfromtheinve
8、rsionresults.ThemethodissuccessfullyappliedtotheGaotaiziOilFi
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