板中油田东部板桥油层组沉积相及砂体分布规律研究

板中油田已进入开发中后期，由于含油面积大、断块多、含油井段长，具有多套油水系统,该区的勘探开发是一个不断认识、不断挖潜的过程。在消化吸收前人研究成果的基础上，根据区域背景、沉积特征和砂体形态等综合分析．确定主力油层组——板桥油层组沉积物为重力流水道沉积，以取心井建立的单井相模式为依据，利用典型的测井曲线、形态特征、砂岩等厚图及钻井沉积剖面特征等多种反映沉积演化规律的地质信息，将重力流水道沉积体系划分为水道、水道侧翼、水道间、湖盆泥4种微相，进一步利用取心和测井资料．确定储集层物性与沉积相的关系，为滚动勘探开发和综合治理提供了可靠的地质依据。

Study on the sedimentary phase and sand-body distribution rule in East Banqiao Oil Group of Banzhong Oilfield

Banzhong Oilfield has entered into the medium-later period, the exploration and development of the area is a process of unceasingly understanding and excavating due to larger oil-bearing area, many faults and longer oil-bearing interval. On the basis of digesting and absorbing the pre-studied results and according to the comprehensive analysis of area background, sedimentary characteristics and sand-body morphological feature, it was determined that the main oil group was Banqiao oil group, the sedimentary way of which was the density current channel sedimentary. According to the single well phase mode set by sampling wells and using the geologic information reflecting multi sedimentary evolution rules such as typical wire-line logging curves, morphological feature, sandstone contour map and drilling sedimentation profile properties, the sedimentary system of the density current channels could be divided into four micro-phases of the water channel, water channel flank, inter-channel and lake basin. The relationship between the reservoir physical properties and sedimentary phase was determined by further applying coring and wire-line logging information, providing the reliable geological basis for rolling exploration, development and comprehensive study.