摘要
Abstract
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 back-ground,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 ana-lyzed.It is believed Wenchang Formation mainly developed semi-deep lacustrine to deep-lacustrine faci-es 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Key words
Pearl River Mouth Basin/Huizhou Sag/Wenchang Formation/seismic facies/sedimentary systems分类
能源科技
