阿克亚苏地区三叠系中油组有利圈闭预测
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摘要
阿克亚苏地区三叠系中油组是该区最重要的油气产层,但以往对其砂体类型及展布特征一直认识不清。在中油组砂体发育的层序SQ4内LST4-TST4高精度等时层序地层格架中,根据录、测井资料结合粒度分析手段识别出辫状河三角洲前缘、湖底扇内扇、中扇、外扇及滨浅湖、半深湖—深湖6种亚相,9种微相,揭示了中油组主砂体主要为水下分流河道、补给水道、辫状沟道及滑塌扇砂体。运用地震相分析并结合Stratimagic波形地震相、地震频谱分解、振幅地震属性及波阻抗反演等技术手段,对LST4主砂体展布进行了预测,确定了砂体沉积微相类型及其展布特征;根据波阻抗反演揭示的砂体分布结合LST4主砂体顶面构造特征,优选出Th2井东侧湖底扇中扇断背斜圈闭和Kz2井南部湖底扇中扇辫状沟道岩性圈闭两个有利目标。
The Triassic middle oil-member is the most important production pay zone in Akeyasu Area,however its sandbody type and its distribution characteristics have not been clearly understood. In high precision chorostratigraphy framework which was developed in LST4-TST4 of sequence SQ4 in middle oil-member sandbodies,by integrating logging data with grain size analysis 6 subfacies including braided river delta front,sublacustrine inner fan,middle fan,outer fan and shore-shallow lake,semi deep lake-deep lake,and 9 microfacies were recognized,it is revealed that the main types of the middle oil-member major sandbodies are underwater distributary channel,supply water channel,braid canal and slump fan sandbody. By integrating seismic facies analysis with some technical means,such as Stratimagic waveform seismic facies analysis,seismic spectral decomposition,seismic amplitude attribute analysis and impedance inversion,the distribution of LST4 major sandbody was predicted and its sediment microfacies type and distribution were determined,based on sandbody distribution which was revealed by impedance inversion and top structural feature of the LST4 major sandbody,two favorite targets which are sublacustrine fan middle fan faulted anticline trap located in the east of Th2 well and sublacustrine fan middle fan braid canal lithologic trap located in the south of Kz2 well were optimized.
The Triassic middle oil-member is the most important production pay zone in Akeyasu Area,however its sandbody type and its distribution characteristics have not been clearly understood. In high precision chorostratigraphy framework which was developed in LST4-TST4 of sequence SQ4 in middle oil-member sandbodies,by integrating logging data with grain size analysis 6 subfacies including braided river delta front,sublacustrine inner fan,middle fan,outer fan and shore-shallow lake,semi deep lake-deep lake,and 9 microfacies were recognized,it is revealed that the main types of the middle oil-member major sandbodies are underwater distributary channel,supply water channel,braid canal and slump fan sandbody. By integrating seismic facies analysis with some technical means,such as Stratimagic waveform seismic facies analysis,seismic spectral decomposition,seismic amplitude attribute analysis and impedance inversion,the distribution of LST4 major sandbody was predicted and its sediment microfacies type and distribution were determined,based on sandbody distribution which was revealed by impedance inversion and top structural feature of the LST4 major sandbody,two favorite targets which are sublacustrine fan middle fan faulted anticline trap located in the east of Th2 well and sublacustrine fan middle fan braid canal lithologic trap located in the south of Kz2 well were optimized.
引文
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[15]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
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[2]周永昌,杨国龙.塔里木盆地阿克库勒地区油气地质特征及勘探前景.石油学报,2001,22(3):1~5
[3]张以明,康洪全,沈华等.碎屑岩储层预测技术适用性研究.石油地球物理勘探,2008,43(4):447~452
[4]于红枫,王英民,李雪.Strati magic波形地震相分析在层序地层岩性分析中的应用.煤田地质与勘探,2006,34(1):64~67
[5]张进铎,杨平,王云雷.地震信息的谱分解技术及其应用.石油地球物理勘探,2006,29(4):235~238
[6]袁志云,孔令洪,王成林.频谱分解技术在储层预测中的应用.石油地球物理勘探,2006,41(增刊):11~15
[7]许丽英,许鸣洁,陈振岩.利用谱分解技术进行薄储层预测.石油地球物理勘探,2006,41(3):299~302
[8]张延章,尹寿鹏,张巧玲等.地震分频技术的地质内涵及其效果分析.石油勘探与开发,2006,33(1):64~71
[9]窦欣,陈振岩,李成等.辽河西部凹陷齐62井区岩性油气藏储集层特征及识别技术.石油勘探与开发,2006,33(4):412~415
[10]吕公河,于常青,董宁.叠后地震属性分析在油气田勘探开发中的应用.地球物理学进展,2007,21(1):161~166.
[11]凌云研究组.基本地震属性在沉积环境解释中的应用研究.石油地球物理勘探,2003,38(6):642~653
[12]范军侠,梁锋,田永.海南地区东三段水下分流河道砂体的识别与预测.地球物理学进展,2007,22(5):1527~1532
[13]张研,张颖,孙夕平等.地震储集层预测技术在不同勘探开发阶段的应用.石油勘探与开发,2006,31(1):59~63
[14]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
[15]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
[16]杨林.于奇西地区砂泥岩薄互层反演方法应用研究.石油物探,2008,47(2):186~190
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