四川盆地资阳地区龙王庙组优质储层识别与分布预测

发布时间：2018-08-31 09:15

【摘要】：四川盆地资阳地区龙王庙组局限台地台内滩沉积厚度薄,且在工区西北部剥蚀尖灭,有效识别资阳地区龙王庙组优质储层分布是油气取得突破的关键。基于ZY1井及三维地震资料,在储层精细标定及层位解释基础上,首先利用地震相及振幅属性刻画有利的沉积相带,再结合分频属性及波阻抗反演确定有利储层的边界及厚度,最终利用古地貌及裂缝预测确定优质白云岩储层的空间分布规律。综合预测结果表明,资阳地区龙王庙组储层纵向上主要分布在中上部,横向上主要发育两个呈北东向条带状展布的滩体。工区西北部位于二叠系沉积前的古地貌高部位,且暴露剥蚀区更易形成有利的溶蚀孔隙型白云岩储层,是有利的油气聚集区带。
[Abstract]:Longwangmiao formation in Ziyang area of Sichuan Basin has a thin sediment thickness in the limited platform and exfoliation in the northwest of the working area. It is the key to make a breakthrough in oil and gas to effectively identify the distribution of high quality reservoir in Longwangmiao formation in Ziyang area. Based on the ZY1 well and 3D seismic data, on the basis of fine reservoir calibration and horizon interpretation, the favorable sedimentary facies zone is first characterized by seismic facies and amplitude attributes, and then the boundary and thickness of favorable reservoir are determined by frequency division attribute and wave impedance inversion. Finally, the spatial distribution of high quality dolomite reservoir is determined by paleogeomorphology and fracture prediction. The comprehensive prediction results show that the reservoir of Longwangmiao formation in Ziyang area is mainly distributed in the middle and upper part of the reservoir longitudinally, and two flat bodies are mainly developed in the transverse direction. The northwestern part of the work area is located at the high position of paleomorphology before the Permian deposition, and the exposed denudation area is more likely to form favorable porous dolomite reservoir, which is a favorable oil and gas accumulation zone.
【作者单位】：中国石化西南油气分公司勘探开发研究院;
【基金】：中国石油化工股份有限公司科研项目“川南、川西南海相成藏条件研究”(编号:P10002)资助
【分类号】：P618.13

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