中南大学学报（自然科学版）2017，Vol.48Issue(11)：2979-2989,11.DOI:10.11817/j.issn.1672-7207.2017.11.019
珠江口盆地陆丰凹陷大中型油田地质特征及形成条件
Geological characteristics and forming conditions of large and medium oilfields in Lufeng Sag of Eastern Pearl River Mouth Basin
摘要
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.关键词
大中型油田/辫状河三角洲/油源/文昌组/珠江口盆地Key words
large and medium oilfields/braided river delta/oil and source rock/Wenchang formation/Pearl River Mouth Basin分类
能源科技引用本文复制引用
张向涛,汪旭东,舒誉,张素芳,阙晓铭,佘清华,王艳飞..珠江口盆地陆丰凹陷大中型油田地质特征及形成条件[J].中南大学学报（自然科学版）,2017,48(11):2979-2989,11.基金项目
国家重大科技专项(2011ZX05023-001) （2011ZX05023-001）
中国海洋石油总公司综合科研项目(YXKY-2015-SZ-02) (Project (2011ZX05023-001) supported by the National Major Science and Technology Program （YXKY-2015-SZ-02）
Project(YXKY-2015-SZ-02) supported by Comprehensive Technology Research Program of Chinese National Offshore oil Corporation) （YXKY-2015-SZ-02）
