储层平面沉积相带图的动态修正方法

Reservoir plane sedimentary facies corrected using dynamic data

为获得砂体的展布形态、沉积环境和沉积体认识的准确性,以大庆油田杏十二区复合驱为例,利用示踪剂技术和动态数据分析对平面沉积相带图进行修正。结合各井组的动态数据响应,分析研究区东部和西部各四个井组的示踪剂监测数据,对静态平面沉积相带图进行验证,检验动静反映是否一致;对动静不符的河道边部界限以及骑墙河道的走向逐层进行修正。用此方法修正后,沉积相动静符合率有显著提高;平面沉积相带图对平面砂体的展布和特征描绘更加精细。该方法为研究剩余油分布情况和地下流体流动规律提供了借鉴。

This paper is aimed at improving the accurate understanding of the distribution pattern, sedimentary environment and sedimentary body of the sand body in the research area.The research drawing on Xing Twelve Area of Daqing Oilfield as an example works towards the modification of plane deposition phase diagram using tracer technology and dynamic data analysis;the analysis of the tracer monitoring data of four well groups in the east and west of the study area, combined with the dynamic data response of various well groups;the verification of the static plane sedimentary facies belt to identify whether the static and dynamic response is consistent;and the correction of the direction of the abandoned river course and the direction of the fence river if there occurs the inconsistency between static and dynamic response.The results demonstrate that this method provides a remarkable improvement in the coincidence rate of sedimentary facies and dynamic movement and a more elaborate description of the distribution and characteristics of the plane sand body, using the plane sedimentary facies belt.The study could provide a reference for studying the distribution of remaining oil and the law behind underground fluid flow.