自相关滤波法提取弱异常方法在油气勘查中的应用  

The application of auto-correlation filtering to extract weak anomaly in oil and gas exploration

作　　者：徐剑春 郝兴中[2] 吴成平 王鑫 XU Jianchun;HAO Xingzhong;WU Chengping;WANG Xin(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing,100083;Shandong Institute of Geological Survey,Jinan,250014)

机构地区：[1]中国自然资源航空物探遥感中心,北京100083 [2]山东省地质调查院,济南250014

出　　处：《地质论评》2024年第6期2295-2302,共8页Geological Review

基　　金：2023年度省级地质勘查项目(编号:鲁勘字(2023)2号)的成果。

摘　　要：在论述自相关滤波法理论的基础上,通过对各种理论模型进行实验,由实验效果分析方法的优势,并以我国某区域重力资料为例,对该区域内重力资料进行了自相关滤波计算,计算结果压制了区域场的影响,提取出油气藏相关的局部弱异常,并与布格重力异常、垂向导数以及剩余异常等资料相互验证,取得了很好的应用效果。基于该地区的计算结果,证明自相关滤波法可应用于油气勘查中,可为其他油气勘查区圈定油气藏的有利局部构造提供可靠并且准确的研究方法,从而达到辅助油气勘查的效果。Objectives:The autocorrelation filtering method can be applied to oil and gas exploration,and can provide a reliable and accurate research method for the favorable local structure of oil and gas reservoirs in other oil and gas exploration areas,so as to achieve the effect of assisting oil and gas exploration.Methods:On the basis of discussing the theory of autocorrelation filtering method,through experiments on various theoretical models,by analyzing the advantages of the experimental results of the method,and taking the gravity data of a region in China as an example,the autocorrelation filtering calculation of the gravity data in this region is carried out.Results:The results suppress the influence of the regional field,extract the local weak anomaly related to the reservoir,and verify with the Bouguer gravity anomaly,vertical derivative and residual anomaly,and obtain good application results.Conclusions:The autocorrelation filtering method is used to process the gravity anomaly data,suppress the influence of the regional field,highlight the local weak anomaly,not only extract the meaningful anomaly from the superposition field,but also the anomaly range is closer to the actual boundary of the source body than the original anomaly.

关 键 词：自相关滤波 重力异常 弱异常 油气勘查 

分 类 号：P618.13[天文地球—矿床学] P631.1[天文地球—地质学]