东濮凹陷文东地区沙三段层序地层学特征

廖远涛; 张世民; 夏鹏远; 何汉坤; 王家豪

东濮凹陷文东地区沙三段层序地层学特征

1.
中国地质大学资源学院, 湖北武汉 430074
2.
中原油田分公司天然气事业勘探部, 河南濮阳 457001
3.
中原油田采油一厂, 河南濮阳 457071

基金项目: 中国石油化工股份有限公司中原油田分公司采油一厂项目

详细信息

作者简介:
廖远涛(1977 -), 男, 博士生, 主要从事层序地层学、沉积学、油气地质与勘探方面的研究工作.E-mail: lyt706@163.com

中图分类号: P53
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出版历程
- 收稿日期: 2004-07-15
- 刊出日期: 2005-03-25

Sequence Stratigraphy of Es₃ Member in Wendong District, Dongpu Depression

1.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
Gas Exploration Department of Zhongyuan Oilfield Branch Company, SINOPEC, Puyang 457001, China
3.
No.1 Production Factory of Zhongyuan Oilfield Company, SINOPEC, Puyang 457071, China

摘要

摘要: 运用层序地层学理论,通过钻井高精度层序地层分析(包括单井岩心沉积相分析、单井高精度层序地层分析、联井高精度层序划分对比),结合地震层序分析,东濮凹陷文东地区沙三段(Es₃) 可划分为4个三级层序: SQ₁、SQ₂、SQ₃、SQ₄,可识别出4种主要沉积体系: 湖泊三角洲体系、湖泊体系、重力流体系、扇三角洲体系.综合前述特征,文东地区沙三段层序地层学特征表现为: SQ₁在文东斜坡带上发育浅湖相,局部地区发育重力流沉积; 东侧发育扇三角洲体系,并逐渐退积.SQ₂—SQ₄文东斜坡带上主要发育湖泊体系(滨湖、浅湖、半深湖和盐湖) 与湖泊三角洲前缘亚相; 东侧主要为扇三角洲体系,规模较小.结合层序地层与沉积学特征分析,湖泊三角洲前缘砂体、扇三角洲砂体、重力流砂体是文东地区有利的储集体.
- 层序地层学 /
- 沉积体系 /
- 文东地区 /
- 东濮凹陷
Abstract: Wendong district is a very important exploration area in Dongpu depression,and the sequence stratigraphy study is critical to find subtle trap and increase reserve and production in this district. Based on the analysis of high-resolution sequence stratigraphy in well logs (including core facies analysis,single well sequence analysis and cross wells sequence division),and interpretation of sequence stratigraphy in seismic sections,the Es₃ member in Wendong district,Dongpu depression is divided into four third-order sequences: SQ₁,SQ₂,SQ₃ and SQ₄. Four main sedimentary systems can be identified in Es₃. They are lacustrine-delta system,lacustrine system,gravity flow system and fan delta system. The former opinions show that shallow lake developed on the Wendong slope,gravity flow system developed in topical place and fan delta system developed in the east reigion and regressed gradually in SQ₁. From SQ₂ to SQ₄,lacustrine system (including lacustrine beach,semideep lake,deep lake and saline lake) and the front of lacustrine delta developed on the Wendong slope; at the same time,fan-delta system developed in the east reigion and the scope became small. On the basis of the analysis of sequence stratigraphy and the depositional system,the front sand body of the lacustrine delta,and the sand bodies of the fan-delta system and gravity flow are favorable targets to explore lithologic reservoir and lith-structural reservoir in Wendong district.
- sequence stratigraphy /
- sedimentary system /
- Wendong distict /
- Dongpu depression

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图 1 东濮凹陷文东地区区域构造

Fig. 1. Sketch structure map of Wendong district in Dongpu depression

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图 2 东濮凹陷文东地区(Es₃) 重力流体系沉积特征及沉积组合

a.水下重力流沉积(濮深7井Es₃³); b.滑塌重力流特征及沉积组合(文177井Es₃⁴); 1.泥岩; 2.粉砂质泥岩; 3.含砾砂岩; 4.灰质粉砂岩; 5.泥质粉砂岩; 6.油页岩; 7.水平层理; 8.波状交错层理; 9.变形构造; 10.泄水构造; 11.基准面下降; 12.基准面上升

Fig. 2. Depositional characteristics and association of gravity flow of Es₃ member in Wendong district, Dongpu depression

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图 3 东濮凹陷文东地区Qc2井SQ₂、SQ₃高精度层序地层分析

1.粉砂岩; 2.粉砂质泥岩; 3.泥岩; 4.油页岩; 5.含膏泥岩; 6.灰质泥岩; 7.基准面下降; 8. 基准面上升

Fig. 3. High-resolution sequence stratigraphy of analysis of SQ₃、SQ₂ of Qc2 in Wendong district, Dongpu depression

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图 4 东濮凹陷文东地区过Xw16-W93-Q2井的地震剖面层序地层解释

Fig. 4. Interpretation map of sequence stratigraphy of seismic profile across Xw16-W93-Q2 in Wendong district, Dongpu depression

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图 5 东濮凹陷文东地区沙三段(Es₃) 沉积充填序列与层序地层划分图

Fig. 5. Sediment fill-sequence and division of sequence stratigraphy of Es₃ member in Wendong district, Dongpu depression

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图 6 东濮凹陷文东地区沙三段(Es₃) 层序地层模式

1.浅湖-半深湖; 2.滨浅湖+前三角洲; 3.重力流沉积; 4.扇三角洲; 5.初始湖泛面; 6.湖泊三角洲前缘; 7.盐湖; 8.干盐湖; 9.最大湖泛面; 10.层序界面

Fig. 6. Sequence stratigraphy model of Es₃ member in Wendong district, Dongpu depression

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