塔里木盆地碳酸盐岩地震资料处理的几项关键技术
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摘要
塔里木盆地奥陶系碳酸盐岩是典型的岩溶储集体,因碳酸盐岩内部地层界面波阻抗差异小,奥陶系内幕反射明显较弱。岩溶缝洞的发育在地震剖面上表现为"串珠状"反射,这个特征有助于识别岩溶。针对研究区的特点,在资料处理中,注重资料的相对保幅处理、去噪方法的优选,采用合理的反褶积技术,以提高奥陶系内幕资料的分辨率。叠前时间偏移技术的合理应用是突出塔中工区奥陶系内幕反射特征的有效手段。
Ordovician carbonate rocks in Tarim Basin are typical karst reservoirs.For the little difference of wave impedance in the formation interface of the carbonate rocks,the reflection information from the Ordovician is obviously poor.The development of karst fracture on the seismic profile displays a string of beads,which is a significant method for identifying karst.According to the characteristics of Tazhong area,we should place stress on the optimization of the relative amplitude preserved processing and denoising method in seismic processing and choose advisable deconvolution technique to improve the resolution of Ordovician.The application of prestack time migration technique is an effective approach to stand out the reflectance signature of Ordovician in Tazhong area.
Ordovician carbonate rocks in Tarim Basin are typical karst reservoirs.For the little difference of wave impedance in the formation interface of the carbonate rocks,the reflection information from the Ordovician is obviously poor.The development of karst fracture on the seismic profile displays a string of beads,which is a significant method for identifying karst.According to the characteristics of Tazhong area,we should place stress on the optimization of the relative amplitude preserved processing and denoising method in seismic processing and choose advisable deconvolution technique to improve the resolution of Ordovician.The application of prestack time migration technique is an effective approach to stand out the reflectance signature of Ordovician in Tazhong area.
引文
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[2]阎相宾,张涛,李铁军,等.塔里木盆地碳酸盐岩油气藏勘探潜力及方向探讨[J].江汉石油学院学报,2002,124(14):7-9.
[3]王西文,刘全新,吕焕通,等.相对保幅的地震资料连片处理方法研究[J].石油物探,2006,45(2):105-120.
[4]尚新民,石林光,李红梅,等.胜利油田YA地区三维地震资料AVO处理[J].石油物探,2001,40(3):82-93.
[5]于平,赵震宇.勘探地震学数据处理中的三种反褶积技术[J].世界地质,2002,21(2):181-183.
[6]梁桂美,曹锡娜,贾福宗.多道统计期望子波反褶积模块的应用[J].石油地球物理勘探,2003,38(增刊):15-22.
[7]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1994.
[8]俞寿朋.高分辨率地震勘探[M].北京:石油工业出版社,1994.
[9]郭刚明,郭树祥,李建明,等.四阶速度分析与动校正方法及应用效果分析[J].油气地质与采收率,2003,10(2):38-39.
[10]Tsvankin I,Thomsen L.Nonhyperbolic reflection moveout in aniso-tropic media[J].Geophysics,1994,59(8):1290-1304.
[11]王愫.双反射偏移(DWM)技术介绍及应用[J].岩性油气藏,2008,20(2):78-82.
[12]Sun Ch,Martinez R D.Amplitude preserving V(z)prestack Kir-choff time migration for VTI media[J].First Break,2001,19:618-624.
[13]樊卫花,杨长春,孙传文,等.三维地震资料叠前时间偏移应用研究[J].勘探地球物理进展,2006,22(3):836-842.
[14]顾家裕.塔里木盆地轮南地区下奥陶统碳酸盐岩岩溶储层特征及形成模式[J].古地理学报,1999,1(1):54-60.
[15]李宇平,王振宇,李文华,等.塔中Ⅰ号断裂构造带奥陶系碳酸盐岩圈闭类型及其勘探意义[J].地质科学,2002,37(增刊):141-151.
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