BZ油田古近系储层沉积过程数值模拟

发布时间：2018-09-01 16:06

【摘要】：BZ油田古近系储层埋藏深,地震资料分辨率低,储层沉积模式认识不清,使得开发方案编制面临挑战。综合应用地震、测井和岩心分析资料,通过量化沉积体系发育的主控因素,开展三维沉积过程数值模拟。结果表明:古近系沉积时,共有南西和北东2个方向沉积物源向湖盆中心共同汇聚,其中南西方向物源供给速率大,砂体分布范围广;湖盆充填演化过程中,纵向上发育4期砂体,晚期形成的2期砂体分布面积大,且两侧物源在湖盆中心交汇。以沉积模型作为约束条件,运用三维地质建模技术建立储层岩相分布预测模型,并用新钻的2口评价井对模型进行可靠性评价。钻后结果表明,储层砂体预测符合率达到90%以上。
[Abstract]:The Paleogene reservoir in BZ oilfield is deeply buried, the resolution of seismic data is low, and the reservoir sedimentary model is not clear. By synthetically applying seismic, logging and core analysis data, the numerical simulation of three dimensional deposition process is carried out by quantifying the main controlling factors of the development of sedimentary system. The results show that, in Paleogene, there are two direction sediment sources converging from the south west and the north east to the center of the lake basin, in which the south west direction material supply rate is large, the sand body distribution is wide, and the lake basin filling evolution process, The sand bodies developed in the fourth stage longitudinally, and the sand bodies of the second stage formed in the late stage have a large distribution area, and the two side provenances converge in the center of the lacustrine basin. The reservoir lithofacies distribution prediction model is established by using 3D geological modeling technology with sedimentary model as constraint condition, and the reliability of the model is evaluated by two newly drilled evaluation wells. The results of drilling show that the prediction coincidence rate of reservoir sand body is more than 90%.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)
【分类号】：P618.13

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