严双江 周路

摘 要：栖霞组是九龙山地区二叠系最为重要的气藏之一，近年来得到了快速的勘探开发。但由于该段横向非均质性强，同时受到地震分辨率不高及含气储层较薄等因素的影响，其储层地震地质响应特征不明确，严重影响了运用物探手段进行储层预测的效果。基于此，利用九龙山地区的井震资料，从储层模型正演的角度解析栖霞组地震地质响应特征，通过构建合理的地质模型进行正演模拟，明确栖霞组含气储层为弱振幅复波，围岩则为高频强振幅波峰。通过研究为利用九龙山地区气藏的地震地质特征进行储层预测提供了重要依据。

关键词：九龙山地区;栖霞组;正演模拟;属性分析

中图分类号：P618 文献标识码：A 文章编号：1003-5168（2021）34-0-03

Forward Modeling of Permian Reservoir in Jiulongshan Area

YAN Shuangjiang ZHOU Lu

（Southwest Petroleum University， Chengdu Sichuan 610500）

Abstract： The Qixia formation is one of the most important permian gas reservoirs in the Jiulongshan area， which has been rapidly explored and developed in recent years， at the same time， it is affected by the low seismic resolution and the thin gas-bearing reservoir， and the characteristics of the seismic-geological response of the reservoir are not clear. In this paper， we use the well seismic data in Jiulongshan area to analyze the seismic geological response characteristics of the Qixia formation from the point of view of reservoir model forward modeling， it is clear that the gas bearing reservoir of the Qixia formation is a complex wave of weak amplitude， while the surrounding rock is a peak of high frequency and strong amplitude. This study provides an important basis for reservoir prediction by using the seismic geological characteristics of Jiulongshan gas reservoir.

Keywords： Jiulongshan area;Qixia formation;forward simulation;attribute analysis

1 引言

棲霞组是九龙山地区二叠系最为重要的气藏之一，该段储层埋藏较深，普遍在6 000 m左右，地震资料品质受深度因素影响，分辨率不高，有效频带较窄。该区域位于九龙山地区的米仓山台缘隆起带西南侧，紧邻米仓山山前断褶构造带，断层活动发育，并伴随栖霞组沉积经历多期规模不一的构造运动，使得栖霞组非均质性较强，导致该段储层的地震地质响应特征不显著，从而给本区的地球物理研究带来较大困难[1-3]。即便该区域栖霞组的地质条件较差，前人还是做了大量研究，为笔者提供了借鉴思路。笔者根据该区的井震资料，利用储层模型正演解析本区栖霞组储层的地震地质响应特征。首先，通过研究区的井震资料分析，选取合理的正演关键参数，为正演模拟奠定基础;其次，利用井震联合连井对比分析，构建合理的正演地质模型;最后，基于地质模型正演结果，结合属性分析，预测了研究区的储层平面展布。……