张鹏飞,刘天娇,赵兰全,常象春,隋青林,赵洪康
ZHANG Pengfei,LIU Tianjiao,ZHAO Lanquan,CHANG Xiangchun,SUI Qinglin,ZHAO Hongkang

• 1:中国石化胜利油田分公司勘探开发研究院
• 2:山东科技大学地球科学与工程学院

摘要(Abstract)：

针对惠民凹陷的基山砂体在垂直方向上多期叠加、横向变化迅速，导致砂体对比困难的问题，利用多种群遗传算法（MPGA）与动态时间归整算法（DTW）相结合的方法进行惠民凹陷沙河街组三段（沙三段）中亚段基山砂体层序地层的划分和对比，同时利用多种常规分析方法对智能划分的结果进行验证。在高频层序的约束下，进一步分析了基山砂体的沉积相以及相控砂体的展布特征。结果表明：基山砂体可以划分为7个四级层序（Psq1-Psq7）和21个五级层序，砂体厚度变化显著，横向迁移特征突出；该区域整体上是由三角洲前缘至前三角洲，再到浊积沉积体系组成的沉积序列；横向上，基山砂体在北—中—南方向的空间发育呈现出较强的分割性，并影响了其垂直方向上的叠置关系，这种分割性总体上受到三角洲多水道发育模式、朵叶体排列方向以及前缘至远端加厚带等因素的控制；平面上，基山砂体呈叠置连片状，且从西向东逐渐增强，前缘主水道向东推进的距离较远，使得远端的浊积砂体更为发育。研究成果明确了惠民凹陷高频层序格架下的砂体展布规律，为进一步分析基山砂体含油气层段的空间分布特征提供依据。
Aiming at correlation challenge of Jishan sandbody in Huimin Sag caused by vertical multi-stages superimposition and rapid lateral variation, division and correlation of sequence strata in Jishan sandbody of Es3 m submember in Huimin Sag are performed by combining multi-population genetic algorithm(MPGA) and dynamic time warping algorithm(DTW), and intelligent division results are validated with several conventional analytical methods. Sedimentary facies of Jishan sandbody and extension characteristics of facies-controlled sandbody are further analyzed constrained by high-frequency sequence. The results show that Jishan sandbody is divided into 7 fourth-order sequences(Psq1-Psq7) and 21 fifth-order sequences, with significant thickness variation and prominent lateral migration characteristics. This area generally presents a sedimentary sequence composed of delta front to pro-delta and then turbidite sedimentary system. Laterally, Jishan sandbody shows much segmentation in north-central-south direction, influencing its vertical superimposition relationship. This segmentation is mainly controlled by multichannels development pattern in delta, lobes orientation and thickening zones from front to distal end. Areal distribution of Jishan sandbody shows superimposed and contiguous pattern that gradually strengthens from west to east.Long eastward advancement distance of the main front channel makes distal turbidite sandbodies more developed.The research clarifies sandbody distribution laws in Huimin Sag in high-frequency sequence framework, providing basis for further analysis of spatial extension characteristics of oil and gas bearing intervals of Jishan sandbody.

关键词(KeyWords)： 层序地层;惠民凹陷;基山砂体;多种群遗传算法(MPGA);动态时间归整算法(DTW)
sequence strata;Huimin Sag;Jishan sandbody;multi-population genetic algorithm(MPGA);dynamic time warping algorithm(DTW)

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目“多成因要素叠加下的储层固体沥青分子地球化学判识及形成机制”（42372160）;; 胜利油田勘探开发研究院科技外协项目“惠民凹陷基山砂体成因类型及分布规律研究”（30200018-23-ZC0613-0004）

作者(Author): 张鹏飞,刘天娇,赵兰全,常象春,隋青林,赵洪康
ZHANG Pengfei,LIU Tianjiao,ZHAO Lanquan,CHANG Xiangchun,SUI Qinglin,ZHAO Hongkang

DOI: 10.19597/J.ISSN.1000-3754.202401028

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