地震沉积学在滨南浊积砂岩区的研究及应用
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摘要
运用地震沉积学的理论,使用90°相位转换和地层切片等关键技术,结合钻测井资料,对滨南地区滨682井区古近纪沙河街组3个层序的砂体分布特征和沉积体系进行了精细研究。结果表明,该区东部和东南部浊积砂体较为发育。层序Ⅰ早期浊积砂体分布面积较大,中期和晚期面积较小;层序Ⅱ早期和晚期浊积砂体分布范围较大,中期很小;层序Ⅲ主要分布在南部地区。证明该方法不但简单,而且减少了穿时问题,适合楔形沉积层序的分析研究。
By using the theory of seismic sedimentology,using 90 ° phase shift technology and formation slices technology,combining with drilling and logging wells datas,distribution characteristics of sand in three sequences and sedimentary system of No.682 well in Binnan area in Paleogene Shahejie formation have been studied in detail.It is showed that turbidite sand bodies are well developed in eastern and southeastern area.The distribution square of turbidite sand bodies are large in early period of sequenceⅠ,while they are small in middle and later period;the distribution square of turbidite sand bodies are large in early and late period of sequence Ⅱ,while they are small in middle period;sequence Ⅲ is mainly distributed in southern area.It is proved that the method is not only simple,but also can reduce the diachronous problem.It is suitable for carrying out analysis and study on wedge type sedimentary sequence.
By using the theory of seismic sedimentology,using 90 ° phase shift technology and formation slices technology,combining with drilling and logging wells datas,distribution characteristics of sand in three sequences and sedimentary system of No.682 well in Binnan area in Paleogene Shahejie formation have been studied in detail.It is showed that turbidite sand bodies are well developed in eastern and southeastern area.The distribution square of turbidite sand bodies are large in early period of sequenceⅠ,while they are small in middle and later period;the distribution square of turbidite sand bodies are large in early and late period of sequence Ⅱ,while they are small in middle period;sequence Ⅲ is mainly distributed in southern area.It is proved that the method is not only simple,but also can reduce the diachronous problem.It is suitable for carrying out analysis and study on wedge type sedimentary sequence.
引文
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[2]Zeng Hongliu,Hentz Tucker F.High-frequency sequencestratigraphy from seismic sedimentology:App lied toMio-cene,Vermilion Block 50,Tiger Shoal area,offshore Louisi-ana[J].AAPG B ulletin,2004,88(2):153-174.
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[4]王平贵,李彦强,赵连素.东营凹陷王庄地区古近纪沙河街组三段扇三角洲砂砾岩体沉积特征分析[J].山东地质,2003,19(增刊):78-80.
[5]陈旭,陈红汉,董玉文,蔡李梅.地震沉积学研究方法评析[J].沉积与特提斯地质,2010,30(1):54-59.
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