莺歌海盆地充填史及中—深层储层特征

王华; 朱伟林; 王彦

doi:10.11743/ogg19990112

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莺歌海盆地充填史及中—深层储层特征
CHARACTERISTICS OF MEDIUM-DEEP RESERVOIR AND SEDIMENTARY HISTORY IN YINGGEHAI BASIN
1999年20卷第1期页码：55-57
网络首发：1999-03-25，

纸质出版：1999
DOI： 10.11743/ogg19990112
稿件说明：

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王华, 朱伟林, 王彦. 莺歌海盆地充填史及中—深层储层特征[J]. 石油与天然气地质, 1999,20(1):55-57. DOI： 10.11743/ogg19990112.

Wang Hua, Zhu Weilin, Wang Yan. CHARACTERISTICS OF MEDIUM-DEEP RESERVOIR AND SEDIMENTARY HISTORY IN YINGGEHAI BASIN[J]. 1999, 20(1): 55-57. DOI： 10.11743/ogg19990112.

摘要

莺歌海盆地为前第三系基底上发育的断坳转换伸展盆地。纵向上总体显示海进充填序列。自始新世以来

该盆地经历了3次由快到慢的沉积过程

-T

(280Ma以前)阶段为快速沉降期

最大总沉降率达600m/Ma

-T

(2.8～5.2Ma)阶段为500m/Ma

至现今(5.2Ma至现今)

最大总沉降率又达600m/Ma.构造作用产生的沉降量占总沉降量的1/2～1/4

其他主要为均衡沉降所致。三角洲砂体、海滩砂体和浊积砂体是本区中-深层主要储集层。黄流组沉积时期

分流河道发育

可能形成良好的储层。

Abstract

Yinggehai Basin is a fault-depressed basin developed on the basement of PreTertiary System.In vertical

the basin shows generally transgressive filling sequences.The basin underwent three deposition processes since Eocene.T

～T

(before 28 Ma)was rapid subsidence period

the total rate of descent was 600 m/Ma;the total descent rate of T

～T

(28 Ma～5.2 Ma)period was 500 m/Ma;that of T

～ present day (5.2 Ma～ present) is 600 m/Ma.The amount of subsidence caused by tectonics is about 1/2～1/4 of the total amount;the rest is mainly related to isostatic subsidence.It is proposed that deltaic

beach and turbidite sandbodies are the main mediumdeep reservoirs in the basin;the distributary channel sandbodies deposited during Huangliu Formation may be favourable reservoirs.