《全球油气分布》渤海湾盆地油气分布

Q+N
r2
Ar
E
E
E
Ar
Mz
E
Mz
Mz Mz
Granite
Augite diorite
36
Upper Mantle
(Peridotite)
46 km
Geological,seismic and gravity profiles of Bohai Gulf coastal basin,showing crustal thinning and relationship to rift-depression development (Li Desheng,1982)
Triassic
terminology
Regional structural setting of Bohai Bay Basin
渤海湾盆地油田分布
冀东油区 大港油区 渤海油区 华北油区
胜利油区
凹陷
1－平邑，2－蒙阴，3－莱芜， 4－泗水，5－汶东， 6－莱芜西，7－肥城， 8－大汶口， 9－汶上-宁阳， 10－潍北， 11－东营， 12－惠民， 13－沾化， 14－车镇， 15－埕北
2009年全国全年石油产量1.8949亿吨，天然气830亿立方米,而95%油气产量是 产于七大沉积盆地。
Lecture Outline
Bohai Bay Basin
1. Regional setting and structural geology 2. Stratigraphy, depositional environment 3. Oil/gas distribution and salient features of petroleum geology 4. Exploration history: evolution of play ideas 5. Discovery process and where to find more oil 6. Integrated approach in exploring for turbidite reservoirs
二、渤海湾裂谷盆地的形成演化 •晚中生代太平洋板块俯冲，地幔柱热拱 •早期火山活动强烈，地壳减薄明显 •存在多次热扰动，形成多个沉积旋回 •边界断层呈犁式向深层变缓 •断陷结构由陡坡带、中央凹陷带、中央背 斜构造带、缓坡带组成
sagging phase
Evolution of Songliao Basin, East China
郯庐断裂
郯 庐
Distribution of oil and gas fields in BBB
Paleogene: transtensional stage
Neogene:中生代构造略图
N-S Cross section through Zhuangxi buried hill located in the Zhanhua Depression of the Jiyang Sub-basin.
N
Cross section through JY sub-basin
S
Thickness of Kongidan Fm?? (Zhai Guangming et al., 1988, cited in Allen et al., 1997)
6
Isopach map for the
Eocene Kongdian
Facies map (Yao Yimin et al., 1994)
Facies map (Yao Yimin et al., 1994)
Facies map (Yao Yimin et al., 1994)
Regional structural setting of Bohai Bay Basin
Lecture Outline
B. Bohai Bay Basin 2. Stratigraphy, depositional environment
Pre-Tertiary Basement
The Bohai Basin developed within the North China Block. PreTertiary basement is composed of diverse lithologies such as:
3. Combination of transtension and strike-slip faulting Geometry of deformation zone changed at ca.43-45 Ma (middle Eocene) (Allen et al., 1997)
Late Mesozoic transpressional deformation stage
2. Pull-apart Model
3. Combination of transtension and strike-slip faulting Geometry of deformation zone changed at ca.43-45 Ma (middle Eocene)
主动裂谷盆地油气藏形成与分布
Facies map of upper Sha-3 and lower Sha-2 in Jiyang Sub-basin
Facies map of Sha-1 Member in Jiyang Sub-basin
Lecture Outline
B. Bohai Bay Basin 3. Oil/gas distribution and salient features of petroleum geology
Ⅱs：扇三角洲 Ⅱhs：三角洲相
Ⅲc：冲（洪）积扇
(据胜利油田地质院)
Liangjialou ramp margin turbidite fan.
contours are net sand isopach in m
Cross sections show hydrocarbons reservoired in coarse, clean channel sands with stratigraphic pinchout. SP log signatures show blocky pattern typical of channels and serrated pattern typical of thinner outer fan deposits.
Fm (Li Deshang,
1981; Xu Jie et al.,
1985)
Isopach map for the Eocene Kongdian Fm (Xu Jie et al., 1985)
Facies map (Yao Yimin et al., 1994)
Facies map (Yao Yimin et al., 1994)
When thrust formed? Thrust fault formed during Triassic Indosinian orogeny
Schematic diagram for the Tertiary evolution of BBB
a: sedimentation occurs as result of dextral transtension in narrow, isolated rifts in parts of BBB; b: rifting has propagated southwards from Liaohe, and possibly northwards from eastern Jiyang to an extensional overlap that is Bozhong
rifting phase
upwelling of magma
地幔上隆成因机制
NW
10 0
-10 -20 -30 -40
mgal
Yanshan
0
Ar
1
2
3
4
5
6
J
Ar
r32
E
Mz
E
Mz
E
Mz
16
26
Bohai Gulf basin
Shandong Peninsula SE
g profile
Bouguer anomalies gravity profile
Cross section through JY sub-basin
N
S
4 8
(Zhai Guangming et al., 1988, cited in Allen et al., 1997)
Major fault zones in Bohai Bay Basin
1. Two Stage Crustal Extension Model
Structural framework of Liaohe Sub-basin
Cross sections showing the along-strike development of the Liaohe segment of the Tan-Lu strike slip fault zone
clastics, and • Mesozoic continental coal-bearing clastics and volcanics.
据何海清等(2001)修编
General Cenozoic stratigraphic column in Jiyang Sub-basin
Interpretation of seismic line 69.6 in the Liaohe Sub-basin
General Cenozoic stratigraphic column
Facies map of upper Sha-4 member in Jiyang Sub-basin