CAJ | 학술논문

综合利用恩平凹陷丰富的地震资料，通过古地貌特征分析、古沟谷识别及多相带联合追踪等方法，明确恩平凹陷古近系文昌组沉积时期的古地貌特征及砂体展布规律。恩平凹陷文昌组砂体成因和平面展布与沉积古地理背景及古沟谷密切相关：凹陷北部陡坡带受控洼断裂及古沟谷控制，发育一系列向北退覆式叠置的扇三角洲砂砾岩体，与中深湖相泥岩指状交互，其发育期次、规模与边界断裂活动密切相关；凹陷南部EP18－1继承性古隆起控制南部斜坡带的古沟谷发育与古地貌格局，将南部斜坡带分割成东西两个古沟谷物源供给体系，两个古沟谷体系分别控制EP17洼及EP18洼南斜坡辫状河三角洲的展布方向，而EP18－1继承性古隆起上则发育大型滩坝相砂体。
종합이용은평요함봉부적지진자료，통과고지모특정분석、고구곡식별급다상대연합추종등방법，명학은평요함고근계문창조침적시기적고지모특정급사체전포규률。은평요함문창조사체성인화평면전포여침적고지리배경급고구곡밀절상관：요함북부두파대수공와단렬급고구곡공제，발육일계렬향북퇴복식첩치적선삼각주사력암체，여중심호상니암지상교호，기발육기차、규모여변계단렬활동밀절상관；요함남부EP18－1계승성고륭기공제남부사파대적고구곡발육여고지모격국，장남부사파대분할성동서량개고구곡물원공급체계，량개고구곡체계분별공제EP17와급EP18와남사파변상하삼각주적전포방향，이EP18－1계승성고륭기상칙발육대형탄패상사체。
Taking advantage of the extensive seismic data,the structure palaeogeomorphology characteristics and sand bodies distribution regularities of Paleogene Wenchang Formation in Enping Sag are discussed by correlated theories on the characteristics of palaeogeomorphology,identification of ancient valley and joint phase tracking. The causes and plane distribution of the sand bodies of Wenchang Formation are closely associated with the dep-osition of ancient geographical background and the ancient valley.The northern steep slope of Enping Sag is controlled with the fault and the ancient valley.It develops a series of north offlap fan-delta glutenite bodies which interactively touches with the mid-deep lake facies mudstones,and its development period and scale is closely related to the boundary fault activity.The EP18-1 inherited palaeohigh has controlled the ancient valley develop-ment and ancient landform pattern of the southern slope,and the southern slope zone is divided into two ancient valley source supply systems.They control the distribution direction of the braided river delta in the south slope of EP17 and EP18,while the EP18-1 inherited palaeohigh develops large-scale beach bar sand body.