苏北盆地海相地层残存状况及成藏类型分析

潘文蕾; 彭金宁; 翟常博; 李海华; 邱建华; 曹倩; 李风勋; 陆永德

doi:10.11781/sysydz202202231

苏北盆地海相地层残存状况及成藏类型分析

doi: 10.11781/sysydz202202231

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2.
中国石化石油勘探开发研究院, 北京 100083

基金项目:

中国石化油田部项目“苏北—南黄海盆地中古生界成藏条件与有利区评价” YTBXD-01-SKY21-2020

详细信息

作者简介:
潘文蕾(1969—) , 男,高级工程师,从事石油地质与勘探研究。E-mail :panwl.syky@ sinopec.com。

中图分类号: TE122.32
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- 被引次数: 0
出版历程
- 收稿日期: 2021-03-23
- 修回日期: 2022-02-15
- 刊出日期: 2022-03-28

Residual strata and hydrocarbon accumulation model of marine sediments in Subei Basin

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China

摘要

摘要: 基于前人研究认识和勘探成果，结合区域地球物理剖面解析和钻井资料分析，探讨了苏北地区海相地层在经历了印支—燕山期挤压构造与喜马拉雅期伸展构造迭加改造下的变形及分布面貌。在此基础上，综合成藏组合分析，总结了研究区可能的油气成藏类型及其主控因素。研究认为：(1)苏北地区以淮阴—东台断裂为界，西侧残留地层以下古生界为主，纵向上基本表现为地层倒转，由北往南逐渐由老变新；东侧残留地层以上古生界为主，纵向上正常分布，同样由北往南地层逐渐变新。(2)苏北地区存在四类与海相地层有关的油气成藏类型，即早期原生残留型、晚期新生古储型、晚期古生新储型和晚期古生古储型。早期原生残留型必须同时具备早期成藏有利区及燕山期改造破坏程度弱两大要素；晚期新生古储型必须具备陆相烃灶与海相储层对接的良好配置要素；晚期古生新储型残留海相地层必须具备晚期生烃烃灶及垂向运移到陆相储层的通道两要素；晚期古生古储型残留海相地层必须具备晚期生烃烃灶及纵向区域盖层封盖良好两要素。晚期古生新储型油气藏是近期海相勘探突破的有利类型，晚期古生古储型油气藏应是海相勘探拓展的有利类型。
- 油气成藏模式 /
- 油气成藏条件 /
- 构造运动 /
- 海相地层 /
- 苏北盆地
Abstract: Based on the understandings of previous studies and exploration results, with the analyses of regional geophysical profiles and drilling data, it was discussed in this paper the deformation and distribution of marine sediments in the northern Jiangsu area under the superimposed transformation of Indosinian-Yanshanian compressional structures and Himalayan extensional structures. On this basis, the possible types of hydrocarbon accumulation and their key controlling factors of the study area were summarized by comprehensive analysis of accumulation assemblage. Results indicate that: (1) Bounded by Huaiyin-Dongtai fault, the Lower Paleozoic strata dominate the remaining strata of the west side, which basically show a stratum inversion in vertical direction and gradually change from old to new from north to south. The remaining strata of the east side are dominated by the Upper Paleozoic, which are normally distributed vertically and gradually change from old to new from north to south. (2) There are four types of hydrocarbon accumulation related to marine strata in the northern Jiangsu area, including early-stage primary-generation and residual type, late-stage new-generation and ancient-storage type, late-stage ancient-generation and new-storage type, and ancient-generation and ancient-storage type. For the early-stage primary-generation and residual type, two factors must be occurred: the favorable area for early accumulation and the weak degree of reconstruction and damage in the Yanshanian period. For the late-stage new-generation and ancient-storage type, the connection between continental hydrocarbon kitchen and marine reservoir is needed. For the late-stage ancient-generation and new-storage type, there must be late hydrocarbon generation kitchen and vertical migration channel to continental reservoir. For the late-stage ancient-generation and ancient-storage type, there must be late hydrocarbon generation kitchen and vertical regional cap rocks. The late-stage ancient-generation and new-storage type is a favorable target for recent breakthroughs in marine exploration, and the late-stage ancient-generation and ancient-storage type is favorable for further exploration.
- hydrocarbon accumulation model /
- hydrocarbon accumulation condition /
- tectonic movement /
- marine strata /
- Subei Basin

HTML全文

图 1 苏北盆地地震综合解释剖面及构造分带

测线位置见图 2。

Figure 1. Seismic interpretation profiles and tectonic division of Subei Basin

下载: 全尺寸图片幻灯片

图 2 苏北盆地海相单元构造分区及上白垩统浦口组沉积厚度

Figure 2. Marine tectonic units in Subei Basin and overlap sedimentary thickness of Upper Cretaceous Pukou Formation

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图 3 苏北盆地淮阴—东台断裂以西不同构造单元钻井地层南北向连井剖面对比

剖面位置见图 4。

Figure 3. Contrast of N-S stratigraphic profile of drilling wells in different structural units to the west of Huaiyin-Dongtai fault, Subei Basin

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图 4 苏北盆地海相残留地层分布

Figure 4. Distribution of marine residual stratum in Subei Basin

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图 5 苏北盆地淮阴—东台断裂以东不同构造单元钻井地层南北向连井剖面对比

剖面位置见图 4。

Figure 5. Contrast of N-S stratigraphic profile of drilling wells in different structural units to the east of Huaiyin-Dongtai fault, Subei Basin

下载: 全尺寸图片幻灯片

图 6 苏北盆地海相层系成藏条件及成藏模式

Figure 6. Accumulation conditions and models of marine strata in Subei Basin

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图 7 苏北盆地海相层系不同成藏类型及油气显示分布

Figure 7. Different types of accumulation and distribution of oil and gas shows in marine strata in Subei Basin

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表 1 苏北盆地海相地层成藏类型分类

Table 1. Marine accumulation types in Subei Basin

成藏期次	成藏类型	成藏主控因素	印支期构造变形位置	喜马拉雅期构造变形位置	实例
早期	原生残留型	早期成藏有利区带、构造改造程度弱	对冲弱褶皱带	弱伸展变形带	未发现
晚期	古生古储型	晚期海相烃灶、保存条件	对冲弱褶皱带	弱伸展变形带	黄桥
	古生新储型	晚期海相烃灶、输导条件	东侧冲断带	强伸展变形带	盐城朱家墩
	新生古储型	晚期陆相烃灶、源储对接	西侧冲断带	强伸展变形带	溱潼、真武

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