CAJ | 학술논문

综合利用大量二维、三维地震及钻井资料，首次在珠江口盆地白云-荔湾凹陷东侧珠江组中部发现了大型深水水道体系，呈“S”型近SN向展布，北起白云凹陷东北部，经南部隆起，往南延伸进入荔湾凹陷，总长约152 km，宽3.0～7.5 km。受物源远近及古地形影响，该水道在不同区段具不同的形态与沉积充填特征：北段形态相对较顺直，剖面上呈“V”型或“U”型，以垂向叠置的多期水道充填为主，钻井揭示为正旋回叠加的细砂岩；中段充填了下窄上宽的“U”型复合水道，内部可见天然堤-溢岸、水道及滑塌体；南段演化为形态弯曲的分支水道，加积充填为主，天然堤-溢岸沉积较发育，水道末端沉积了席状朵叶体。水道体系内发育优质储盖组合，经断层及底辟作用与下伏源岩沟通，油气成藏条件优越。中下部水道、天然堤-溢岸中的岩性、地层等非构造圈闭及上部水道、朵叶体中发育的构造-岩性复合圈闭为有利勘探目标。珠江组大型水道的发现，将进一步拓宽珠江组深水沉积的勘探领域，有力推动深水区油气勘探的深入。
종합이용대량이유、삼유지진급찬정자료，수차재주강구분지백운-려만요함동측주강조중부발현료대형심수수도체계，정“S”형근SN향전포，북기백운요함동북부，경남부륭기，왕남연신진입려만요함，총장약152 km，관3.0～7.5 km。수물원원근급고지형영향，해수도재불동구단구불동적형태여침적충전특정：북단형태상대교순직，부면상정“V”형혹“U”형，이수향첩치적다기수도충전위주，찬정게시위정선회첩가적세사암；중단충전료하착상관적“U”형복합수도，내부가견천연제-일안、수도급활탑체；남단연화위형태만곡적분지수도，가적충전위주，천연제-일안침적교발육，수도말단침적료석상타협체。수도체계내발육우질저개조합，경단층급저벽작용여하복원암구통，유기성장조건우월。중하부수도、천연제-일안중적암성、지층등비구조권폐급상부수도、타협체중발육적구조-암성복합권폐위유리감탐목표。주강조대형수도적발현，장진일보탁관주강조심수침적적감탐영역，유력추동심수구유기감탐적심입。
Based on the analysis of substantial 2D/3D seismic data and drilling data,a deep-water channel system was discovered forthe first time in the central part of Zhujiang Formation,east of Baiyun-Liwan sag in Pearl River Mouth Basin.This channel systemis NS-trending in an S pattern,with a total length of 152km and a width of 3 to 7.5km.It starts from the northeast of Baiyun sag,traverses the uplift zone southward,and extends into Liwan sag in the south.As influenced by the provenance distance and thepalaeogeomorphology,the channel system obtains segmented morphological features and depositional fillings.The northern segmentof the channel system is relatively straight with a V or U pattern in the profile,mainly filled with vertically superimposed multiple-phase channels consisting of fine sandstone superimposed upon positive cycles.The middle segment is filled with U-type channelcomplexes of levee-overbank,channels,and slumps with narrow bottom and broad top.The southern segment evolves into sinuousaggradational channels with levee-overbank in the flank and sheet-like lobes in the frontal side.Quality assemblage of reservoir andseal are developed in connection to the underlying source rocks through faults and diapirs,providing superior accumulation conditionsin the channel system.Profitable exploration targets include nonstructural traps (e.g.,lithologic and stratigraphic traps)in the low-middle channels and levee-overbank as well as structural and lithologic traps in the upper channels and lobes.Discovery of the deep-water channel system in Zhujiang Formation will broaden the exploration scope of the deep-water deposition and promote oil and gasexploration in deep-water areas.