地震属性在煤层气勘探中的应用——以淮南潘集外围煤层气勘探为例  

Application of seismic attributes in coalbed methane exploration:An example from coalbed methane exploration around Panji,Huainan

作　　者：陈伯年[1] 窦新钊[1] 吕进英[2] 王宏友 CHEN Bonian;DOU Xinzhao;LYU Jinying;WANG Hongyou(Exploration and Research Institute,Bureau of Coal Geology of Anhui Province,Hefei,Anhui 230088,China;Unit of Geophysical Survey,Bureau of Coal Geology of Anhui Province,Suzhou,Anhui 234000,China)

机构地区：[1]安徽省煤田地质局勘查研究院,安徽合肥230088 [2]安徽省煤田地质局物探测量队,安徽宿州234000

出　　处：《安徽地质》2023年第3期215-218,243,共5页Geology of Anhui

基　　金：安徽省自然资源科技项目“淮南煤田煤系气储层非均质性特征及其构造控制机理”(编号:2021-K-8)资助。

摘　　要：在煤层气勘探中,地震勘探可以提供煤层的埋深、厚度、岩性甚至含气性等地质信息,从而进行煤层气富集区的预测。本文在开展二维地震的瞬时振幅、瞬时频率、带宽、短时窗傅里叶分频等属性提取的基础上,结合两口煤层气探井进行淮南潘集煤矿外围煤层含气性的对比分析。钻井测试结果显示,淮南煤田潘集煤矿外围13煤上下、8-1煤之间煤系岩层的部分层段含气量较高,该结论与地震属性分析比较吻合。同时,本文指出二维地震属性分析存在诸多限制,仅可以提取二维空间参数的属性,三维地震属性分析是下一步煤层气勘探的攻关重点。In coalbed methane exploration,seismic exploration can provide geological information on buried depth,thickness,lithology and even gas content of coalbed,so as to predict coalbed methane-rich areas.On the basis of extracting the attributes of 2D seismic profile such as instantaneous amplitude,instantaneous frequency,bandwidth and short-time Fourier frequency division,combined with two coalbed methane exploration wells,this paper makes a comparative analysis of gas contents of coalbeds in the periphery of the Huainan Panji Coalmine.The results of drilling test show that the gas contents are higher in some coal measure strata above and below coalbed 13 and those between coalbed 8 and coalbed 1 in the periphery of Panji Coalmine in the Huainan coalfield,which is in good agreement with the seismic attribute analysis.At the same time,this paper points out that there are many limitations in 2D seismic attribute analysis,which can only extract the attributes of 2D spatial parameters,and 3D seismic attribute analysis is the key issue to tackle in furthering coalbed methane exploration.

关 键 词：地震属性 煤层气 含气性 潘集煤矿 

分 类 号：P631[天文地球—地质矿产勘探]