频率衰减梯度属性在沁水盆地南部煤层气预测中的应用
|
摘要
针对沁水盆地南部二叠系山西组煤系地层煤层气富集的特征,将频率衰减梯度属性应用于该区的煤层含气性检测。首先基于小波变换,利用分解小波谱的时频分析方法,有效地提取了煤层气中地震信号的时间-频率分布特征;其次构建了与实际勘探目标储层物性参数近似的地质模型。模拟结果表明用频率衰减梯度属性识别煤层的含气性的方法是可行的。将该方法应用到沁水盆地南部的煤层含气性预测中,其预测结果与实际测井解释含气性的结论相一致,有效地提高了储层预测的准确性;且为沁水盆地南部煤层气及类似储层的预测提供一种可行的方法。
Coalbed methane is highly enriched in southern Qinshui Basin's P1 s. In this work,aiming to predict Coalbed Methane in this region frequency attenuation gradient was used. A time-frequency method was proposed to analyze wavelet transform. A geological model to simulate the real target reservoir was built. The time-frequency distribution of seismic signal was extracted. The results show that using frequency attenuation gradient is possible to detect gas content in coal,the results are consistent with the real logging results and better than reservoir prediction in terms of predication accuracy of coalbed methane. The method can be used by domain scientist to predict coalbed methane in southern Qinshui Basin and other reservoir similar to Qinshui Basin.
Coalbed methane is highly enriched in southern Qinshui Basin's P1 s. In this work,aiming to predict Coalbed Methane in this region frequency attenuation gradient was used. A time-frequency method was proposed to analyze wavelet transform. A geological model to simulate the real target reservoir was built. The time-frequency distribution of seismic signal was extracted. The results show that using frequency attenuation gradient is possible to detect gas content in coal,the results are consistent with the real logging results and better than reservoir prediction in terms of predication accuracy of coalbed methane. The method can be used by domain scientist to predict coalbed methane in southern Qinshui Basin and other reservoir similar to Qinshui Basin.
引文
1桑逢云.国内外低阶煤煤层气你开发现状和我国开发潜力研究.中国煤层气,2015;12(3):7—9Sang F Y.Research on current situation of global development of coalbed methane at low rank coal mines and it’s potential in China.China Coalbed Methane,2015;12(3):7—9
2 熊晓军,王飞,米鸿,等.基于时频三参数小波变换的频率衰减梯度分析.石油地球物理勘探,2015;50(4):699—705Xiong X J,Wang F,Mi H,et al.Frequency attenuation analysis based on time-frequency three-parameter wavelet transform.OGP,2015;50(4):699—705
3 杨璐.基于频率衰减的储层流体识别方法.成都:成都理工大学,2013Yang L.Reservoir fluid identification method based on frequency.Chengdu:Chengdu University of Technology,2013
4 Xiong Xiaojun,He Zhenhua.High-precision frequency attenuation analysis and its application.Applied Geophysics,2011;8(4):337 —343
5 Zhang Changjun.Seismic attenuation analysis for reservoir description.CSPG CSEG CWLS Convention,2008:409—412
6 周枫.沁水盆地煤层气储层岩石物理及物理模型研究.南京:南京大学,2013Zhou F.Rock physics and physical modeling of the coal-bed methane in Qingshui Basin.Nanjing:Nanjing University,2013
7 程冰洁,徐天吉.地震信号的多尺度频率与吸收属性.新疆石油地质,2008;29(3):314—317Cheng B J,Xu T J.Multi-scale frequency and absorption attributes of seismic signals.Xinjiang Petroleum Gelolgy,2008;29(3):314—317
8 周喆,桂志先,王宁.基于小波变换提取吸收系数方法及应用.断块油气田,2013;20(3):289—292Zhou Z,Gui Z X,Wang N.Extraction method of absorption coefficient based on wavelet transform and its application.Fault-block&Gas Field,2013;20(3):289—292
9 Sinha S,Routh P S.Instantaneous spectral attributes using scales in continous-wavelet transform.Geophysics,2009;74(2):WA137—WA142
10 王宁,桂志先,陈洁,等.基于短时傅里叶变换的频谱比法提取吸收系数及应用.石油天然气学报,2012;34(6):69—71Wang N,Gui Z X,Chen J,et al.The absorption coefficient extracted based on spectral ratio and its application.Journal of Oil and Gas Technology,2012;34(6):69—71
11 郝召兵,秦静欣,伍向阳.地震波品质因子Q研究进展综述.地球物理学进展,2009;24(2):375—381Hao Z B,Qin J X,Wu X Y.Overview of research on the seismic wave quality factor(Q).Progess in Geophysics,2009;24(2):375 —381
12 何兵红,吴国忱.利用叠前地震资料提取地层相对吸收系数.石油地球物理勘探,2012;47(4):610—618He B H,Wu G C.Estimation of relative absorption coefficient using pre-stack seismic data.OGP,2012;47(4):610—618
13 刘雯林.煤层气地球物理响应特征分析.岩性油气藏,2009;21(2):113—115Liu W L.Geophysical response characteristics of coal bed methane.Lithologic Reservoirs,2009;21(2):113—115
14 陈勇,关达,陈洪德,等.地震属性技术在煤层及煤层气储层预测中的应用.石油天然气学报,2014;36(7):65—69Chen Y,Guan D,Chen H D,et al.Application of seismic attribute analysis technology in predicting coalbed and gas reservoir.Journal of Oil and Gas Technology,2014;36(7):65—69
15 刘学清.叠前FVO技术原理与应用.北京:中国地质大学(北京),2013Liu X Q.The theory and application of FVO technology in pre-stack time domain.Beijing:China University of Geosciences,2013
16 毕研斌,龙胜祥,郭彤楼,等.应用频率衰减属性预测TNB地区储层含气性.石油与天然气地质,2007;28(1):116—120Bi Y B,Long S X,Guo T L,et al.Prediciton of gas distribution with frequency attenuation attribute in TNB Area.Oil&Gas Geology,2007;28(1):116—120
2 熊晓军,王飞,米鸿,等.基于时频三参数小波变换的频率衰减梯度分析.石油地球物理勘探,2015;50(4):699—705Xiong X J,Wang F,Mi H,et al.Frequency attenuation analysis based on time-frequency three-parameter wavelet transform.OGP,2015;50(4):699—705
3 杨璐.基于频率衰减的储层流体识别方法.成都:成都理工大学,2013Yang L.Reservoir fluid identification method based on frequency.Chengdu:Chengdu University of Technology,2013
4 Xiong Xiaojun,He Zhenhua.High-precision frequency attenuation analysis and its application.Applied Geophysics,2011;8(4):337 —343
5 Zhang Changjun.Seismic attenuation analysis for reservoir description.CSPG CSEG CWLS Convention,2008:409—412
6 周枫.沁水盆地煤层气储层岩石物理及物理模型研究.南京:南京大学,2013Zhou F.Rock physics and physical modeling of the coal-bed methane in Qingshui Basin.Nanjing:Nanjing University,2013
7 程冰洁,徐天吉.地震信号的多尺度频率与吸收属性.新疆石油地质,2008;29(3):314—317Cheng B J,Xu T J.Multi-scale frequency and absorption attributes of seismic signals.Xinjiang Petroleum Gelolgy,2008;29(3):314—317
8 周喆,桂志先,王宁.基于小波变换提取吸收系数方法及应用.断块油气田,2013;20(3):289—292Zhou Z,Gui Z X,Wang N.Extraction method of absorption coefficient based on wavelet transform and its application.Fault-block&Gas Field,2013;20(3):289—292
9 Sinha S,Routh P S.Instantaneous spectral attributes using scales in continous-wavelet transform.Geophysics,2009;74(2):WA137—WA142
10 王宁,桂志先,陈洁,等.基于短时傅里叶变换的频谱比法提取吸收系数及应用.石油天然气学报,2012;34(6):69—71Wang N,Gui Z X,Chen J,et al.The absorption coefficient extracted based on spectral ratio and its application.Journal of Oil and Gas Technology,2012;34(6):69—71
11 郝召兵,秦静欣,伍向阳.地震波品质因子Q研究进展综述.地球物理学进展,2009;24(2):375—381Hao Z B,Qin J X,Wu X Y.Overview of research on the seismic wave quality factor(Q).Progess in Geophysics,2009;24(2):375 —381
12 何兵红,吴国忱.利用叠前地震资料提取地层相对吸收系数.石油地球物理勘探,2012;47(4):610—618He B H,Wu G C.Estimation of relative absorption coefficient using pre-stack seismic data.OGP,2012;47(4):610—618
13 刘雯林.煤层气地球物理响应特征分析.岩性油气藏,2009;21(2):113—115Liu W L.Geophysical response characteristics of coal bed methane.Lithologic Reservoirs,2009;21(2):113—115
14 陈勇,关达,陈洪德,等.地震属性技术在煤层及煤层气储层预测中的应用.石油天然气学报,2014;36(7):65—69Chen Y,Guan D,Chen H D,et al.Application of seismic attribute analysis technology in predicting coalbed and gas reservoir.Journal of Oil and Gas Technology,2014;36(7):65—69
15 刘学清.叠前FVO技术原理与应用.北京:中国地质大学(北京),2013Liu X Q.The theory and application of FVO technology in pre-stack time domain.Beijing:China University of Geosciences,2013
16 毕研斌,龙胜祥,郭彤楼,等.应用频率衰减属性预测TNB地区储层含气性.石油与天然气地质,2007;28(1):116—120Bi Y B,Long S X,Guo T L,et al.Prediciton of gas distribution with frequency attenuation attribute in TNB Area.Oil&Gas Geology,2007;28(1):116—120