岩性圈闭预测方法及应用

Method of Lithologic Trap Prediction and Its Application

随着油田勘探技术的不断进步和勘探目标的日益深化,地质目标从寻找大构造、发展到寻找微幅度构造和非构造的隐蔽油气藏。以往的研究结果表明,岩性预测方法由于受到地震资料分辨率及技术条件等因素的限制,其研究方法及对成果的认识都有其局限性,从而使预测的合理性和精度都不高,因此,本文以高分辨率地震资料为基础,应用测井、钻井及地震等资料,从沉积微相分析入手,建立了不同砂体类型的地质及地震正演模型,并根据地震反射波组特征、地震反演的阻抗值及其它地震属性参数,综合确定出研究区域的砂体变化及其分布规律。总结出一套针对薄互层特点的岩性圈闭识别技术,并在大庆长垣以西古龙和英台-大安地区的实际应用中取得了明显的效果。

Based on high-resolution seismic data,using well logging data, drilling data and seismic data, and using sedimentary micro-fa-cies.this paper establishes geological and seismic forward models for different kinds of sand bodies. And according to characteristics of seismic reflecting series, impedance from seismic inversion and other seismic attribute parameters, we determine the sand body variation and define its distribution in the study area. A set of lithologic trap identification technology for thin interbedded layers from this study is obtained. The good result from applying the method to real data from Gulong and Yingtai-Daan areas to the west of Daqing Pla-canticline is obtained.