松辽盆地茂8井三维地震区薄互层储层预测方法及效果

PREDICTION METHOD AND ITS EFFECT FOR THIN INTERRED RESERVOIR IN A 3-D SEISMIC SURVEY AREA OF SONGLIAO BASIN

大庆油田物探公司研究所,大庆163357

Research Institute, Geophysical Exploration Corporation, Daqing oil field

本文针对松辽盆地陆相薄互层的沉积特点,结合茂8井三维地震区块的实际情况,采用“滑动相关法”确定地震地质层位,准确标定了各反射同相轴的地质含义。依据砂岩或砂层组在三维剖面上的特征,充分发挥人机联作解释系统的优势,利用振幅、频率对主要含油层系砂岩的横向变化进行了深入研究,经钻井验证取得了较好的效果。

This paper summarizes the work on applying a "sliding correlation" method to figure out the geological implication for events on a seismogram and then to define the geological stratification for the seismogram, in which attention is given to the depositional features of the continental facies thin interbeds in Songliao Basin and the actual situation of the survey area where the 3-D seismic survey was conducted. We have moreover gone deep into studying the lateral variation of the amplitude and frequency regarding the sandy formation which is considered to be the main reservoir on an interactive interpretation system based on its features emerging on 3-D profiles. The results were verified with drilling data.