基于双相介质的地震油气检测技术
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摘要
四川盆地中部白庙地区须家河组在钻探中油气显示频繁,勘探潜力巨大,对白庙地区须家河组须二段、须四段开展油气检测研究十分必要。通过双相介质中流体检测原理与流程:即,根据地下双相介质的地震响应存在"低频共振、高频衰减"的现象,检测研究区目的层有利含油气范围的分布。研究区目的层地震资料波形完整、无切值无截频现象,地震资料品质较好;须二段和须四段储层地震响应特征表现为弱振幅,连续性好、频率低。根据双相介质流体检测流程对研究区29条总长890km的二维地震测线的须二段、须四段实施油气检测;应用须二段、须四段2个目的层在各条地震测线上做出的检测结果,再分别制作平面图,从而确定有利勘探区域。该技术对扩大勘探领域、寻找新的勘探区具有重要的现实意义。
The Xujiahe Formation in Baimiao area in the middle part of Sichuan Basin has frequent oil and gas shows in drilling and it indicates tremendous exploration potential.It is important to develop the study of oil-gas detection in the Second Member and the Forth Member of Xujiahe Formation.The detection of distribution of favorable oil and gas range in the target strata is based on the fluvial detection principle and flow in two-phase medium,i.e.,based on the phenomenon of "low frequency resonance and high frequency attenuation" of seismic response of underground two-phase medium.The wiggles of seismic data are intact and complete.There are no phenomena of cut value and cutoff frequency,and the quality of seismic data is good.The seismic response of reservoirs of the Second Member and the Forth Member of Xujiahe Formation represents weak amplitude,good continuity and low frequency.According to the fluvial detection flow in two-phase medium,the oil-gas detection has been realized on 29 two-dimentional seismic profiles in the total thickness of 890km of the Second Member and the Forth Member of Xujiahe Formation in the study area.Implementing the oil-gas detecting result of two-target strata of the two members on every seismic profile,final plane figures are separately completed,so that the favorable exploration area is determined,which is of actual significance in expanding the exploration realm and in searching for new exploration areas.
The Xujiahe Formation in Baimiao area in the middle part of Sichuan Basin has frequent oil and gas shows in drilling and it indicates tremendous exploration potential.It is important to develop the study of oil-gas detection in the Second Member and the Forth Member of Xujiahe Formation.The detection of distribution of favorable oil and gas range in the target strata is based on the fluvial detection principle and flow in two-phase medium,i.e.,based on the phenomenon of "low frequency resonance and high frequency attenuation" of seismic response of underground two-phase medium.The wiggles of seismic data are intact and complete.There are no phenomena of cut value and cutoff frequency,and the quality of seismic data is good.The seismic response of reservoirs of the Second Member and the Forth Member of Xujiahe Formation represents weak amplitude,good continuity and low frequency.According to the fluvial detection flow in two-phase medium,the oil-gas detection has been realized on 29 two-dimentional seismic profiles in the total thickness of 890km of the Second Member and the Forth Member of Xujiahe Formation in the study area.Implementing the oil-gas detecting result of two-target strata of the two members on every seismic profile,final plane figures are separately completed,so that the favorable exploration area is determined,which is of actual significance in expanding the exploration realm and in searching for new exploration areas.
引文
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[3]Xu Guoshen,Liu Shugen.The Dynamics of Natural Gaspoolsin Sichuan Basin[M].Beijing:Geological Publishing House,2005:1-312.[徐国盛,刘树根.四川盆地天然气成藏动力学[M].北京:地质出版社,2005:1-312.]
[4]Mu Yongguang.Reservoir Geophysics[M].Beijing:PetroleumIndustry Press,1996:1-98.[牟永光.储层地球物理学[M].北京:石油工业出版社,1996:1-98.]
[5]Amos Nur.Wave Propagation in the Two-Phase medium[M].Xu Yun.Beijing:Petroleum Industry Press,1986:1-217.[A-mos Nur.双相介质中波的传播[M].许云.北京:石油工业出版社,1986:1-217.]
[6]Yang Zhanlong,Sha Xuemei,Li Zaiguang.Hydrocarbon de-tection and application in lithologic reservoir exploration[J].Natural Gas Geoscience,2010,21(5):822-827,874.[杨占龙,沙雪梅,李在光.含油气检测技术及其在岩性圈闭油气藏勘探中的应用[J].天然气地球科学,2010,21(5):822-827,874.]
[7]Li Zaiguang,Yang Zhanlong,Li Hongzhe,et al.Detection ofhydrocarbon potentials in Shengbei area of Tuha Basin[J].Natural Gas Geoscience,2006,17(4):532-537.[李在光,杨占龙,李红哲,等.吐哈盆地胜北地区含油气性检测[J].天然气地球科学,2006,17(4):532-537.]
[8]Zhang Huixing,He Bingshou,Jiang Xiaodian.Hydrocarbondetection by the attenuation characteristics of the seismicwave in the Two-Phase medium[J].Oil Geophysical Prospec-ting,2010,45(3):343-349.[张会星,何兵寿,姜效典.利用地震波在双相介质中的衰减特性检测油气[J].石油地球物理勘探,2010,45(3):343-349.]
[9]Guo Yaohua,Xie Xin.The application of seismic hydrocarbondetection technology in the Ningdong Oilfield[J].Journal ofthe Petroleum and Natural Gas,2008,30(1):66-70.[郭耀华,谢昕.地震油气检测技术在宁东油田的应用[J].石油天然气学报,2008,30(1):66-70.]
[10]Yue Youxi,Yang Li.Basic theories and methods of seismicreservoir prediction[J].Natural Gas Geoscience,2009,20(4):563-570.[乐友喜,杨丽.储层地震预测基础理论方法研究[J].天然气地球科学,2009,20(4):563-570.]
①魏国齐,杨威.川中地区复杂储层形成的主控因素、展布规律和目标优选.内部报告,2005.
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