线性化地震剖面在沉积相研究中的应用
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摘要
线性化处理就是将黑白同相轴变成线 ,正性轴用实线表示 ,负性轴用虚线表示。经线性化处理后 ,现有的二维或三维地震剖面的地质信息更加突出 ,反映的内容更加清晰。以松辽盆地安达断陷营城组为例 ,通过对DS1井单井相分析 ,沉积微相判别 ,建立地震相与沉积相的对应关系。在对地震剖面进行线性化处理后对沉积进行了解释 ,认为营城组时期火山活动强烈 ,以溢流相为优势相 ,并发育有沼泽相、辫状河相和半深湖相等。该沉积相带大致呈环带状展布 ,被隆起分为南北两个断陷湖泊 ,北部安达小区主要为洪泛平原 ,中间为火山岩 ,明水斜坡及四周丘陵为物源区 ;南部宋站小区呈东西向延伸 ,中央隆起区为火山岩 ,有二个半深湖沉积中心 ,物源为四周隆起地带。
Linearization processing is somehow to turn black and white isopic axis into a line where the positive axis indicated by a solid line while the negative axis shown by a dotted line. After the linearization processing, \{geological\} information in the available two dimensional or three dimensional geological profile will be more highlighted and \{reflect\} it more clear for what it is. Take Yingcheng Formation within Anda fault depression in Songliao basin for \{example,\} a corresponding relation between seismic phase and sedimentary facies has been established by analyzing single well facies of Dashen No.1 well and through sedimentary microfacies division.It is believed by interpreting \{sedimentary\} facies after the linearization processing for through wells and non-through wells in the region that in the period of Yingchen Formation the volcanic activity was strong and overflow facies was a dominant one developed by swamp \{facies\}, braided stream facies and semi-deep lacustrine facies etc. The extension of the sedimentary facies belt is just like a ringlike belt divided into two S-N fault depressed lakes by the uplift, small Anda area in the north is mainly composed of flood plains with volcanic rocks in the middle and Mingshui slope and hills around are believed to be \{material\} source areas; Small Songzhan area in the south trend to E-W direction with the volcanic rock uplift at the \{center\}, and with two semi-deep lacustrine deposit centers and uplift zones around are material source areas.
Linearization processing is somehow to turn black and white isopic axis into a line where the positive axis indicated by a solid line while the negative axis shown by a dotted line. After the linearization processing, \{geological\} information in the available two dimensional or three dimensional geological profile will be more highlighted and \{reflect\} it more clear for what it is. Take Yingcheng Formation within Anda fault depression in Songliao basin for \{example,\} a corresponding relation between seismic phase and sedimentary facies has been established by analyzing single well facies of Dashen No.1 well and through sedimentary microfacies division.It is believed by interpreting \{sedimentary\} facies after the linearization processing for through wells and non-through wells in the region that in the period of Yingchen Formation the volcanic activity was strong and overflow facies was a dominant one developed by swamp \{facies\}, braided stream facies and semi-deep lacustrine facies etc. The extension of the sedimentary facies belt is just like a ringlike belt divided into two S-N fault depressed lakes by the uplift, small Anda area in the north is mainly composed of flood plains with volcanic rocks in the middle and Mingshui slope and hills around are believed to be \{material\} source areas; Small Songzhan area in the south trend to E-W direction with the volcanic rock uplift at the \{center\}, and with two semi-deep lacustrine deposit centers and uplift zones around are material source areas.
引文
大庆石油管理局地球物理勘探公司 松辽盆地北部安达地区深层二维地震老资料重新处理与解释勘探成果报告 (科研报告 ) .1999
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1 CookeDA ,SchmeiderWA .Generalizedlinearinversionofreflectionseismicdata[J].Geophysics,1983,4(8):665～676
2 徐怀大.地震地层学解释[M].北京:石油工业出版社,1988
3 陆基孟.地震勘探原理(下册)[M]东营:石油大学出版社,1993
4 迟元林,王璞君,单玄龙,等中国陆相含油气盆地深层地层研究以松辽盆地为例[M]长春:吉林科学技术出版社,2000
5 徐开志,唐勇,王海东,等用计算机实现判别沉积相方法[J].新疆石油地质,1999,20(4):127～129
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