Abstract: Based on the thin section, grain size, sedimentary structure, vertical sequence, curvature calculation results and log response characteristics of the core in the target interval of the study area, it is shown that typical braided river deposits are developed in the VI sand formation of Y Group in the study area. According to the results of thin slice identification and core analysis, the sedimentary microfacies characteristics of the target interval of the study area are summarized. The relationship between sedimentary microfacies and well logging response is established and applied to the division of single well sedimentary facies. Refer to the recent research results about braided river, both in China and abroad, we propose a braided river sedimentary model of VI sand group of Y Group in Sudan P Oilfield, based on the distribution of braided river in the target layer both on plane and profile, which provides a reliable geological basis for the preparation of the next P oilfield development program.

Key words: Braided river, Sedimentary microfacies, Sedimentary model, Sedimentary characteristics

摘要： 利用目的层段岩心的薄片、粒度、沉积构造、垂向序列、曲率计算结果及测井响应特征等资料，研究Y组VI砂组发育典型的辫状河沉积。根据薄片鉴定和岩心分析结果，总结了研究区目的层段各沉积微相特征；建立了沉积微相和测井响应关系，并应用到单井沉积相的划分；结合前人研究成果和现代沉积特征，立足研究区目的层段辫状河平面和剖面展布特征，提出了一种关于苏丹某区块P油田Y组VI砂组的辫状河沉积模式，为此类油田的后续开发和挖潜提供指导和依据。

关键词: 辫状河, 沉积微相, 沉积模式, 沉积特征