自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第48卷    第11期    总第279期    2017年11月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2017)11-2979-11
珠江口盆地陆丰凹陷大中型油田地质特征及形成条件
张向涛,汪旭东,舒誉,张素芳,阙晓铭,佘清华,王艳飞

(中海石油(中国)有限公司 深圳分公司,广东 深圳,518000)

摘 要: 以珠江口盆地陆丰凹陷古近系文昌组A-1大中型油田为例,通过剖析其成藏要素和作用,探讨文昌组大中型油田的地质特征与形成条件。研究结果表明:文昌组油气主要分布在文昌组下段,为构造—地层型油气藏;储层主要为辫状河三角洲前缘水下分流河道砂岩,物性总体较差,为低孔低渗储层;原油为轻质油、油品好,成熟度Ro适中(Ro=0.73%);深层文昌组油水关系复杂,总体处于正常温压系统;断陷盆地斜坡区的构造背景控制了大面积储盖组合的形成,长期继承性的隆起是油气运移的优势指向区;良好的生烃条件与晚期强充注为大中型油田的形成提供了充足的油源;广泛分布的“甜点”优质储层与断裂结合形成大面积构造-地层圈闭,为油气聚集提供了场所;稳定的区域盖层保证油气在圈闭范围内大规模成藏,并在后期构造活动中不被破坏,有利于大面积原生轻质油藏保存。

 

关键字: 大中型油田;辫状河三角洲;油源;文昌组;珠江口盆地

Geological characteristics and forming conditions of large and medium oilfields in Lufeng Sag of Eastern Pearl River Mouth Basin
ZHANG Xiangtao, WANG Xudong, SHU Yu, ZHANG Sufang, QUE Xiaoming, SHE Qinghua, WANG Yanfei

Shengzhen Branch of China National Offshore Oil Co. Ltd., Shenzhen 518000, China

Abstract:A-1 large and medium oilfield of Paleogene Wenchang formation in Lufeng Sag of northeast Pearl River Mouth Basin was studied to discuss the geological characteristics and forming conditions of Wenchang formation large and medium oilfield through analyzing the elements and the process. The results indicate that oil and gas of Wenchang formation mainly distributes in lower Wenchang formation, and it belongs to tectonic-stratigraphic oil and gas reservoirs. The reservoirs are dominated by braided river delta front edge underwater distributary channel sand, and belong to low porosity and low permeability reservoirs. The crude oil is light oil with moderate maturity (0.73%). There are complex oil-water relationships and normal temperature-pressure system in deep Wenchang Formation. Wenchang Formation in Lufeng Sag has favorable condition to form large and medium oilfields. The tectonic background of the slope area in Rifting basin controls the wide formation of reservoir cap combination, and long-term inherited uplift is the ascendant area for oil and gas migrating. Sufficient hydrocarbon source and late strong charging are favorable for the formation of large and medium oilfields. Good quality reservoirs combine with fractures to form the large-area tectonic- stratigraphic traps, which provides perfect places for petroleum accumulation. Stable regional caps provide ideal environment for hydrocarbon accumulation, and also ensure oil and gas traps not to be damaged in the late tectonic activity. These are favorable for large-area preservation of the light oil reservoirs.

 

Key words: large and medium oilfields; braided river delta; oil and source rock; Wenchang formation; Pearl River Mouth Basin

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号