川东北通南巴构造带飞仙关组鲕滩储层预测

The oolite beach reservoir prediction at Feixianguan formation in Tongnanba structural belt,Northeast Sichuan province

（中国石油化工股份有限公司石油勘探开发研究院，北京100083）

Exploration and Production Research Institute,SINOPEC,Beijing 100083,China

川东北通南巴构造带位于造山带前陆，强烈的构造活动导致其结构和构造非常复杂，储层特征难以确定。针对这一问题，在对通南巴构造带飞仙关组鲕滩储层的测井响应特征和地震响应特征进行分析的基础上，建立了该区飞仙关组鲕滩储层正演模型；基于正演模拟结果，提取了20多种地震属性，并对其敏感性逐一进行分析，优选出瞬时相位、瞬时振幅、瞬时频率、相干及波形等多种对鲕滩储层比较敏感的属性，从而预测了飞仙关组鲕滩储层分布特征。其中，河坝场构造为Ⅰ类鲕滩储层，马路背构造和狮子坪构造为Ⅱ类鲕滩储层,而母家梁构造和黑池梁构造为Ⅲ类。这套鲕滩储层预测技术方法的应用，有效地提高了研究区储层预测的精度。

Tongnanba structural belt develops at orogen foreland in Northeast Sichuan province,strong structural activities leads to complex structures,so the reservoir features are difficult to be identified.Aiming at the problem,based on the characteristic analysis of log response and seismic response of reservoir,we proposed forward model of Feixianguan formation oolitic beach reservoir by using seismic attribute analysis technology.According to the modeling results,more than twenty kinds of seismic attributes are extracted.The attributes most sensitive on oolitic beach reservoir,such as instantaneous phase,instantaneous amplitude,instantaneous frequency，coherency and wave shape,has been optimized to predict the distribution characteristics of oolite beach reservoir at Feixianguan formation.The results show that typeⅠ (the best) oolite beach reservoir develops at Hebachang structure,type Ⅱ (the middle) oolite beach reservoir develops at Malubei and Shiziping structure,and type Ⅲ (the worst) oolite beach reservoir develops at Mujialiang and Heichiliang structure.This series of oolite beach reservoir prediction technologies effectively improves the prediction accuracy of reservoirs at the area.