伊通盆地岔路河断陷油气二次运移模拟

唐文旭; 曹强

doi:10.3799/dqkx.2014.069

伊通盆地岔路河断陷油气二次运移模拟

doi: 10.3799/dqkx.2014.069

唐文旭^1,,
曹强^{1, 2, ,}

1.
中国地质大学资源学院，湖北武汉 430074
2.
中国地质大学构造与油气资源教育部重点实验室，湖北武汉 430074

基金项目:

中央高校基本科研业务费专项资金资助项目“伊通盆地晚渐新世以来压扭构造活动的油气二次运移响应” 2012029135

国家自然科学基金项目“残余盆地古流体动力场演化” 40172051

“构造与油气资源”教育部重点实验室开放基金项目 TPR-2011-33

详细信息

作者简介:
唐文旭(1979-)，男，在读博士研究生，高级工程师，主要从事油气成藏研究.E-mail: 693288546@qq.com

通讯作者:
曹强，E-mail: caoqiangcug@gmail.com

中图分类号: TE122
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出版历程
- 收稿日期: 2013-10-16
- 刊出日期: 2014-06-15

Modeling of Hydrocarbon Secondary Migration in the Chaluhe Sag, Yitong Basin

Tang Wenxu^1
,,
Cao Qiang^{1, 2
, ,}

1.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 以伊通盆地岔路河断陷含油气系统研究为基础，应用二维(2D)盆地模拟方法，对伊通盆地岔路河断陷内主要生储组合E₂s(油源)-E₂s(储层)的油气二次运移演化历史进行了模拟恢复；并依据区内油气汇聚区带的平面分布特征划分油气运聚单元，基于此对各运聚单元内的烃源条件、输导体系、保存条件等油气成藏条件进行综合对比.研究表明：(1)岔路河断陷含油气系统要素配置关系良好，且发育3期油气成藏，E₂s-E₂s(!)为已证实的最重要的含油气系统；(2)岔路河断陷势能场分布控制了同期油气二次运移方向和强度，区内主成藏期油气二次运移范围广、强度(流线密度)大，有利运移指向区主要集中于西北缘盆缘断裂附近和东部的万昌、梁家构造带之内的油气低势区；(3)岔路河断陷可划分为4个油气运聚单元(Ⅰ、Ⅱ、Ⅲ和Ⅳ)，运聚单元Ⅱ的成藏条件最为优越，而运聚单元Ⅰ内的万昌构造带围斜地区亦可作为本区有利勘探区带.
- 伊通盆地 /
- 岔路河断陷 /
- 盆地模拟 /
- 烃 /
- 运聚单元 /
- 石油地质
Abstract: Based on the analyses of petroleum systems in the Chaluhe sag, hydrocarbon secondary migration in thesource-reservoir assemblage (E₂s-E₂s) was evaluated by using 2D basin modeling technique. This study aims to investigate the individual hydrocarbon migration-accumulation units, analyze different conditions for the hydrocarbon accumulation, and locate possible favorable areas as exploration targets. The following conclusions are drawn: (1) Key geologic elements of the petroleum systems are well integrated in the Chaluhe, three events of hydrocarbon accumulation can be identified, and the E₂s-E₂s (!) is recognized as the most significant petroleum system in the study area. (2) Secondary migration direction and intensity were mainly controlled by the fluid potential energy field. Hydrocarbon accumulation during the main period of hydrocarbon migration was characterized by wide distribution and high density. Hydrocarbon fluids mainly charged two areas with lower fluid potential, namely along the northwest basin-marginal fault and the eastern Wanchang, Liangjia uplifts, respectively. (3) The Chaluhe sag consists off our hydrocarbon migration-accumulation units, including units Ⅰ, Ⅱ, Ⅲ, and Ⅳ. Unit Ⅱ has the best potential for hydrocarbon migration and accumulation, followed by unit Ⅰ. The periclinal area in the Wanchang uplift ranks to be the most favorable area for oil and gas exploration in the Chaluhe sag.
- Yitong Basin /
- Chaluhe sag /
- basin modeling /
- hydrocarbons /
- migration-accumulation unit /
- petroleum geology

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图 1 伊通盆地岔路河断陷构造区划

Fig. 1. Major tectonic units of the study area in the Yitong basin showing well and three cross section locations

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图 2 岔路河断陷含油气系统事件

Fig. 2. Events chart for the Eocene and Oligocene petroleum systems in the Chaluhe sag

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图 3 岔路河断陷E₂s-E₂s生储系统油气运移流线演化史

a.36.6 Ma；b.30 Ma；c.10 Ma；d.0 Ma

Fig. 3. Evolution history chart for the petroleum migration routes and accumulation sites of the E₂s-E₂s system in the Chaluhe sag

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图 4 岔路河断陷E₂s-E₂s生储系统油气有利运聚单元示意

a.运聚单元划分；b.运聚单元Ⅰ成藏模式；c.运聚单元Ⅱ成藏模式；d.运聚单元Ⅳ成藏模式

Fig. 4. Evolution history chart for the petroleum migration routes and accumulation sites of the E₂s-E₂s system in the Chaluhe sag

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表 1 岔路河断陷油气二次运移模拟计算方法

Table 1. Methods for secondary migration modeling in the Chaluhe sag

模拟内容	方法选择	拟合依据	参考文献
埋藏史(压实过程)	联合流体流动压实模型	实测孔隙度数据	石广仁等，1993
孔隙度变化	联合流体流动压实模型	实测孔隙度数据	Bethke, 1985
渗透率变化	改进的Kozeny-Carman模型	实测渗透率数据	Ungerer et al., 1990
盆地热流演化	瞬时热流模型	实测地温数据	Bethke, 1985; Jessop, 1990
有机质热成熟度史	Easy %R_o模型	实测R_o数据	Sweeney and Burnham, 1990
排烃史	饱和度排烃模型	排烃门限饱和度为5%	England et al., 1987
注：表中实测地温数据包括DST和试油温度数据.

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表 2 岔路河断陷E₂s-E₂s生储系统(成藏组合)油气运聚单元综合评价

Table 2. Comprehensive evaluation on hydrocarbon migration-accumulation unit of the source kitchen-reservoir assemblage (E₂s-E₂s) in the Chaluhe sag

成藏条件	运聚单元-Ⅰ	运聚单元-Ⅱ	运聚单元-Ⅲ	运聚单元-Ⅳ
分布范围	万昌构造带及其围斜带	新安堡凹陷和梁家构造带	孤店斜坡带	波-太凹陷
烃源条件	西侧新安堡凹陷和东侧波-太凹陷双阳组源岩双重供烃，油源充足	新安堡凹陷双阳组源岩油源充足	波-太凹陷双阳组源岩，油源充足	波-太凹陷双阳组源岩，油源充足
输导体系	砂体和断裂	砂体和断裂	砂体和断裂	砂体和断裂
储集条件	砂体发育，储层物性较好	砂体较发育	砂体较发育	砂体欠发育
圈闭类型	岩性圈闭为主、少量岩性-断层圈闭	断层-岩性断层圈闭	断鼻、断背斜圈闭	岩性圈闭和断层-岩性圈闭
保存条件	构造带顶部发育张性断裂，断至双阳组上部地层，封盖条件差	封盖条件好	较差	封盖条件好
流线类型	平行-汇聚流为主	汇聚流为主	汇聚流	汇聚流为主
运移评价	近源侧向运聚为主，条件好	近源垂向和侧向运聚，条件好	远源侧向汇聚为主，条件好	近源垂向运聚，条件好
油气藏类型	断层-岩性油气藏	断层-岩性油气藏	断鼻油气藏	岩性油气藏
典型油气藏	万参1井和昌27井双阳组气层	昌25井和昌12井双阳组气层	昌32井双阳组气层	昌9井双阳组气层
综合评价	构造带围斜较好	好	一般	一般

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