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通过岩心观察、薄片鉴定、粒度分析及地震属性研究,建立了东濮凹陷濮城构造带沙三中亚段沉积相模式,针对研究区“高隆深洼”的地质特点,结合砂岩和泥岩波阻抗随埋藏深度的变化规律,提出了去压实波阻抗反演方法,在沉积相模式指导下采用该方法进行了储层预测。结果表明:研究区沙三中亚段沉积时期主要发育扇三角洲—湖相泥—滩坝沉积体系,其中兰聊断层下降盘陡坡带发育2个扇三角洲,濮城背斜带为滨浅湖滩坝沉积,储层预测结果揭示出砂体厚值区围绕2个扇三角洲以及濮城背斜带的2个坝主体分布,在2个扇三角洲之间局部发育较厚砂体,其他地区为砂体厚度低值区,砂体展布特征符合沉积规律。在濮城背斜带与濮城次洼之间的斜坡地区,发育的扇三角洲前缘砂体以及2个扇三角洲之间的滩坝砂体具备形成岩性上倾尖灭、砂岩透镜体油气藏的条件,为岩性油气藏勘探的有利目标。
The sedimentary facies model of the Middle Third Member of Pucheng structural belt in Pucheng structural belt of Dongpu Depression was established through core observation, thin slice identification, grain size analysis and seismic attribute study. According to the geological characteristics of the “Gaolong deep depression” in the study area, combined with the sandstone and mudstone wave The change of impedance with the depth of burial depth presents a method of inversion of the compressive impedance by compressive impedance method. The method is applied to predict the reservoir under the guidance of sedimentary facies model. The results show that the sedimentary system of delta-lacustrine mud-beach dam is mainly developed during the sedimentary period of the middle Es3 in the study area, of which two fan delta are developed in the steep slope of the descending plate of the Lan-Lia fault and the Pucheng anticline is the shallow shore beach The results of reservoir sedimentation and reservoir prediction reveal that the thick sand bodies are distributed around the main bodies of two dams in two fan deltaic and Pucheng anticlines, thicker sand bodies are locally developed between the two fan deltas and the rest are sand Body thickness of the low value area, sand distribution characteristics consistent with the deposition law. In the slope area between the Pucheng anticline and Puchengziwa, the developed fan delta front sand body and the beach dam sand body between the two fan delta have the characteristics of lithologic updip, sandstone lens oil and gas The conditions for the reservoir are favorable targets for the exploration of lithologic reservoirs.