湘中涟源凹陷油气成藏与保存条件

周小康; 郭建华

湘中涟源凹陷油气成藏与保存条件

周小康^1,,
郭建华²

1.
中海油深圳分公司研究院, 广州 510240
2.
中南大学地学与环境工程学院, 长沙 410083

基金项目:

高等学校博士学科点专项科研基金资助项目 20050533019

详细信息

作者简介:
周小康(1981-), 男, 硕士, 工程师, 主要从事油气勘探工作。E-mail:zhouxk@cnooc.com.cn

中图分类号: TE122.3
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- HTML全文浏览量: 67
- PDF下载量: 16
- 被引次数: 0
出版历程
- 收稿日期: 2014-04-29
- 刊出日期: 2014-09-28

PETROLEUM ACCUMULATION CHARACTERISTICS AND PRESERVATION CONDITIONS OF LIANYUAN SAG IN THE CENTRAL HUNAN

ZHOU Xiao-kang^1
,,
GUO Jian-hua²

1.
Shenzhen Branch of CNOOC Ltd., Guangzhou 510240, China
2.
School of Geosciences and Environmental Engineering, Central South University, Changsha 410083, China

摘要

摘要: 针对湘中涟源凹陷油气藏成藏期次和时间以及油气藏破坏、改造等进行详细研究, 发现存在多期油气充注。利用沥青、包裹体分析, 印支之前曾有过油的充注, 在印支早期、晚期共发生二期天然气充注。印支期既是高成熟天然气充注期, 又是构造圈闭形成时期, 燕山期只对前期气藏起破坏、改造作用。总结了4种油气藏破坏、改造、保存样式, 即原生油气藏后期无改造样式, 原生油气藏后期简单改造样式, 原生油气藏后期多期改造样式, 原生油气藏后期完全破坏样式。分析认为涟源凹陷3个构造带油气藏保存条件各异, 西部构造带保存最差, 中部较好, 东部最好。
- 涟源凹陷 /
- 保存条件 /
- 油气藏破坏样式
Abstract: Based on the analysis of asphalts and inclusions in Lianyuan sag of Central Hunan, a study on the accumulation periods, destruction and transformation of oil and gas reservoirs has been researched. The result shows that the oil and gas charging occurred during pre-Indo-China movement, with earlier Indo-China movement and later Indo-China movement two times charging naturally. Indo-China Stage was not only high-matured gas time but also structural traps formed time, while Yanshan Stage played a destructive and transformative role on earlier traps and reservoirs. Four destruction, transformation and preservation models of reservoir are proposed, such as original reservoirs without destruction, original reservoirs with little destruction, original reservoirs with serious destruction, and original reservoirs with total destruction. Finally, it comes to a conclusion that three tectonic zones of Lianyuan sag have different preserving conditions, from west to east, the conditions become better and better.
- Lianyuan sag /
- preserve condition /
- destroying method of reservoirs

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图 1 涟源凹陷构造区划图

Figure 1. The tectonic map of Lianyuan sag

下载: 全尺寸图片幻灯片

图 2 金竹山-1 C₁d²细砂岩(粒间见大量不发荧光沥青和发火红色荧光沥青)

Figure 2. Finding lots of bitumen with no fluorescence or red fluorescence in the C₁d² of Jinzhu Mountain

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图 3 涟源凹陷石炭系沥青及包裹体荧光特征分布图

Figure 3. Distribution of fluid inclusion samples with fluorescence and bitumen from Carboniferous, Lianyuan sag

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图 4 涟源凹陷锡矿山C₁d¹油气注入期次(埋藏史据涟8井)

Figure 4. C₁d¹ hydrocarbon charge in Shidengzi Formation in Xikuangshan, Lianyuan sag

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图 5 涟源凹陷油气成藏事件图

Figure 5. Hydrocarbon accumulation event chart of Lianyuan sag

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图 6 涟源凹陷下石炭统测水组盖层分布图

Figure 6. Seals distribution map of the Lower Carboniferous Ceshui Formation

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图 7 涟源凹陷油气藏破坏、改造、保存样式

Figure 7. Destruction, transformation and preservation models of hydrocarbon reservoirs in the Lianyuan sag

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表 1 涟源凹陷断裂破坏油气藏形式

Table 1. The models of breaking the hydrocarbon reservoirs by faults in the Lianyuan sag

样式	断裂	断裂发育类型	油气散失结果	破坏形式
构造运动导致断裂活动	后生断裂	挤压型断裂		A
		拉张型断裂		B
		起分散效应的断裂		C
		起集中效应的断裂		D
		伸入、未切穿盖层的断裂		E
		盖层顶部的断裂		F
其他原因引起断裂活动	先生断裂	构造活动使得断裂重新活动、封闭性变差		G

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