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第
24
卷第
4
期
2010
年
8
月
现代地质
GEOSCIENCE
Vo
l.
24 No.4
Aug.20
1O
厄瓜多尔
Oriente
盆地南部区块
Napo
组层序地层
式与岩性地层圈闭预测
田继军
1
,姜在兴
2
,陈诗望
2
(1.新疆大学地质与勘查工程学院,新疆乌鲁木齐
83
∞
46;
2.
中国地质大学能源学院,北京
1
∞
083
)
摘要:应用经典层序地层学方法,通过不整合面、钻测井等标志将厄瓜多尔
Oriente
盆地南部区块
Napo
组划分为
5
个三
级层序;以地层叠置样式、岩性、岩相的变化细分出陆架边缘、海侵和高位体系域。陆架边缘体系域以潮沙水道沉积
为特征;海侵体系域以广泛分布的陆棚相泥岩沉积为特征;高位体系域发育加积式陆棚相灰岩沉积。最后识别出潮沙
水道砂体、水下浅滩和
Ml
岩性尖灭带
3
种有利的岩性地层圈闭,综合预测
Oriente
盆地南部区块
Napo
组的潮沙水道砂
体发育区是最有利的勘探方向。
关键词:厄瓜多尔;
Napo
组;层序地层;岩性地层圈闭
中图分类号:
TE122.2
文献标志码
:A
文章编号
:1ω0-8527(2010)04
-0678
一
07
Sequence
Stratigraphy
岛
lode
and
Lithologic
Traps
Prediction of Napo
Formation in South Block of Oriente Basin
, Ecuador
TIAN Ji-jun
1
, JIANG Zai-xing2 , CHEN Shi-wang
2
(
1.
College
01
Ge
ological
Exploration
αnd
Engineering. Xinjiang University.
Uru
叫
i
,
Xinjiang
83
∞
46.
China;
2.
School
01
Energy
R
臼
ources.
China University
01
Ge
oscie
即白
,
Beijing
100083.
Chinα)
Abstract:
Napo Formation in south block of Oriente basin
can
be
divided into 5 sequences according
to
se-
quence boundaries
, such
as
unconformity
and
seismic reflective characteristics. Shelf margins systems tracts ,
marine transgressive and highstand systems tracts
can
be
subdivided by the stacking patterns of stratigraphy ,
changes of lithology
and
lithofacies. Shelf margin systems tract is characterized by the tidal flat , lacustrine
transgressive systems tract is charaterized by the wide spread of marine mudstone sedimentation
, and highstand
systems tract is featured by the subaqueous shoal sandstone.
It
is identified that tide
channel
sandstone is the
high quality reservoirs in south block
, tide
channel
sandstone,
Ml
lithologic pointout zones , subaqueous shoal
sandstone are the favorable lithologic traps.
Th
e oil shale of the Napo
Forτnation
marine shale
can
offer platitudi-
nous hydrocarbon. The south block locates in the favorable directional zone of oil and gas migration. Hydrocar-
bon accumulation is in condition of pool-forming. Tide
channel
sandstone growing area is
the
beneficial explora-
tion directions by integrated forecasting.
Key
words:
Ecuador;
Napo Formation; sequence stratigraphy; lithologic and stratigraphic trap
厄瓜多尔
Oriente
盆地位于南美安第斯福皱山
系以东,圭亚那(巴西)地盾区以西,面积约
10
万
km
2
;
Oriente
盆地与其北部的
Putumayo
盆地、南
部的
Maranon
盆地构成的白主系
第三系前陆盆
地是南美安第斯盆地群中油气最富集的地区
[1
-
3]
。
厄瓜多尔
Oriente
盆地南部区块位于
Oriente
盆
地的中北部(图
1
)
,面积
3
304
km
2
0
主要生油层
和储层均为白主系地层,白主系由
Hollin
、
Napo
、
收稿日期:
2010
一
02-20;
改回日期
:2010-04-25;
责任编辑:孙义梅。
基金项目:国家自然科学基金项目
(40672078)
。
作者简介:田继军,男,讲师,博士.
1978
年出生,石油地质学专业,主要从事层序地层学、石油地质方面的教学和研究工
作。
Email:
tianjijun@xju.edu.cn
。
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