珠江口盆地惠州凹陷ZH地区文昌组地震相分析  

Seismic facies analysis of Wenchang Formation in ZH area of Huizhou Sag,Pearl River Mouth Basin

作　　者：王光强 税敏 彭攀 邹清文 马晶贝 WANG Guangqiang;SHUI Min;PENG Pan;ZOU Qingwen;MA Jingbei(Shenzhen Company of CNOOC(China)Co.,Ltd.,Shenzhen 518000,Guangdong,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《石油地质与工程》2025年第1期47-51,共5页Petroleum Geology and Engineering

摘　　要：ZH地区古近系文昌组储层发育,且紧邻HZ26洼烃源岩,具有巨大的勘探潜力,但区内已钻井少、勘探程度低,地层和沉积研究基础资料缺乏,地震资料的使用就变得尤其重要。通过对ZH地区地震资料研究,依据地震反射顶底接触关系,参考区域地质背景,将古近系文昌组划分为SQ1-SQ4四个地震层序;利用地震内部反射结构、外部形态、振幅、频率及连续性等参数,在文昌组层序内识别出楔形-杂乱充填、平行-亚平行、楔形杂乱-前积、前积、透镜状和丘状反射等六种地震相;并结合其特征及演化规律,对沉积体系进行预测分析,认为文昌组主要发育半深湖-深湖相泥岩和近岸水下扇、扇三角洲以及辫状河三角洲砂体。The reservoir of Wenchang Formation in ZH area is adjacent to the source rock of Huizhou 26 Sag and it has great exploration potential.Due to limited drilling and low exploration study,and lack of basic data on stratigraphy and sedimentation,the use of seismic data becomes important.Through detailed seismic data analysis,based on the termination relationship of seismic reflections and regional geological background,Wenchang Formation of the Paleogene in ZH area is divided into four seismic sequences:SQ1-SQ4.Utilizing parameters such as internal reflection structure,external morphology,amplitude,frequency,and continuity of earthquakes,six seismic facies were identified within the Wenchang Formation,including wedge-shaped chaotic filling,parallel-sub parallel sheeting,wedge-shaped chaotic progradation,low angle S-shaped or oblique progradation,lens-shaped and hill-shaped reflections.The characteristics and evolution patterns of seismic facies were described,and sedimentary systems were predicted and analyzed.It is believed Wenchang Formation mainly developed semi-deep lacustrine to deep-lacustrine facies mudstone,nearshore underwater fans,fan deltas,and braided river delta sands.

关 键 词：珠江口盆地 惠州凹陷 文昌组 地震相 沉积体系 

分 类 号：TE122.2[石油与天然气工程—油气勘探]