叠前方位各向异性裂缝预测技术在雷家地区的应用研究

Application of Pre-stack Anisotropy Fracture Predicting Technology in Leijia Area

辽河油田西部凹陷雷家地区古近系沙河街组四段(Es4)储层以裂缝型白云岩为主,经过主断裂的多期活动,形成了具有多方位、多组系特征的裂缝型储层。对该类储层主要采用窄方位地震资料的叠前方位各向异性裂缝预测技术,介绍了该技术的原理及主要技术流程,并进行了实际地震资料的应用。结果表明,雷家地区Es4裂缝型白云岩储层可以划分出3块裂缝发育区,通过与实际资料的对比分析,符合度较高,验证了预测结果的可靠性,提高了油气预测的成功率。

The reservoir in Eogene Es4 in Leijia Area was mainly fractured dolomite in the western Liaohe Oilfield and a fractured reservoir with the characteristics of multi-azimuths,multi-formation systems was developed through multi-stage movements of the main faults.In view of this reservoir,pre-stack anisotropy technology was used to predict fractures by using narrow-azimuth seismic data.The principle and main technical process of the method were introduced,and it was used for seismic data process.The application result shows that in Leijia Area the dolomite fracture reservoir can be subdivided in three fracture growing areas.By comparing with actual process data,it indicates that the prediction result is highly agreed and the result is reliable,by which the success rate of oil and gas prediction is improved.