大牛地气田D66井区奥陶系风化壳储层预测思路与技术探讨
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摘要
随着大牛地气田D66井区D66-38,D66-52等井在奥陶系风化壳发现高产气流,奥陶系风化壳气藏可能成为大牛地气田的重要补充气源。但该区储层类型复杂(裂缝、孔隙、溶孔(洞))、横向非均质性强、储层薄、地震资料分辨率低,储层地震预测困难,勘探开发进展受到制约。探索了"以地质认识为依托,井分析为先导,地震资料针对性处理为基础,通过储层分类预测和地质-地震结合进行综合评价,从而选取有利储层发育区"的储层预测思路与方法,对奥陶系风化壳储层进行了预测和评价,冀望能为该区勘探开发工作提供一定的参考依据。
As the discoveries of high-yield gas flow in the Ordovician weathering crusts in wells such as D66-38 and D66-52 in D66 well zone,the Ordovician weathering-crust gas reservoirs have being accepted as an important supplementary gas source in Daniudi gas field.However,the exploration and exploitation of the Ordovician weathering-crust gas reservoirs are impeded by many factors,including variety of reservoir types(fracture,fissure,cave,and rug),lateral heterogeneity,thin reservoir,and low signal-to-noise ratio of seismic data.Adopting a general idea that based on geological knowledge,guided by well control,and using the object-oriented processed seismic data to distinguish favorable prospects through reservoir classification and geology-seismic comprehensive evaluation,we discussed the prediction and assessment of the Ordovician weathering-crust reservoirs.
As the discoveries of high-yield gas flow in the Ordovician weathering crusts in wells such as D66-38 and D66-52 in D66 well zone,the Ordovician weathering-crust gas reservoirs have being accepted as an important supplementary gas source in Daniudi gas field.However,the exploration and exploitation of the Ordovician weathering-crust gas reservoirs are impeded by many factors,including variety of reservoir types(fracture,fissure,cave,and rug),lateral heterogeneity,thin reservoir,and low signal-to-noise ratio of seismic data.Adopting a general idea that based on geological knowledge,guided by well control,and using the object-oriented processed seismic data to distinguish favorable prospects through reservoir classification and geology-seismic comprehensive evaluation,we discussed the prediction and assessment of the Ordovician weathering-crust reservoirs.
引文
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6陆光辉,朱玉波,张宏,等.隐蔽圈闭识别技术发展概述[J].勘探地球物理进展,2004,27(2):79～86
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