大庆石油地质与开发

2014, v.33;No.163(03) 35-38

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古龙凹陷嫩江组地震前积反射特征与岩石地层厘定
CHARACTERISTICS OF THE SEISMIC PROGRADATIONAL REFLECTION AND LITHOSTRATIGRAPHIC CALIBRATION FOR NENJIANG FORMATION IN GULONG SAG

周华,黄清华,陈泽亚
ZHOU Hua,HUANG Qinghua,CHEN Zeya

摘要(Abstract):

地震沉积学研究揭示古龙凹陷嫩江组二段发育多个自东而西的地震前积反射结构,其顶界T_(06)由多个不同的地震反射同相轴构成,表明传统的嫩江组岩石地层划分具穿时性。利用地震地层学方法,通过SK1井声波时差时深关系标定和过井地震剖面地质层位追踪对比解释,重新界定了T_(06)、T_(05)及T_(04)等地震反射同相轴的地质涵义;结合SK1井实钻资料和连井地层对比剖面研究,重新厘定了古龙凹陷嫩江组岩石地层,将研究区东部嫩江组三、四段底界分别上移2个砂组。
The researches of seismic sedimentology reveal multi-layer EW-strike seismic progradational reflection configurations developed in Member 2 of Nenjiang Formation in Gulong Sag,its top boundary T^ is consist of many different seismic events,thus state clearly that the traditional lithostratigraphic classification of Nenjiang Formation is diachronous.By means of the method of seismic stratigraphy and time depth relationship calibration for Well SKI and geological horizon tracing contrast for the seismic profiles penetrated by the wells,the geological implications of T_(06),T_(05),T_(04) and others seismic reflection events are redefined,integrating with the studies between the drilled data of the well and contrasted sections of the well-commingled formations,the lithostratigraphic dividing programs for Nenjiang Formation in Gulong Sag are calibrated,the bottoms of Member 3 and 4 in East Nenjiang Formation of the study area are individually upshifted two sand groups.

关键词(KeyWords): 古龙凹陷;嫩江组;地震前积反射;岩石地层厘定
Gulong Sag;Nenjiang Formation;seismic progradational reflection;lithostratigraphic calibration

Abstract:

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基金项目(Foundation): 国家重点基础研究发展计划“973”项目“晚中生代温室地球气候—环境演变”(2012CB822002)

作者(Author): 周华,黄清华,陈泽亚
ZHOU Hua,HUANG Qinghua,CHEN Zeya

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