四川盆地东北部三叠系飞仙关组迁移型鲕滩层序地层分析及相控储层预测

陶夏妍; 黄天俊; 张艺华; 边树涛; 魏朋辉; 韩嵩; 邓惠; 蔡强

doi:10.3969/j.issn.1006-6535.2023.06.009

特种油气藏 >

2023 , Vol. 30 >Issue 6: 62 - 71

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.06.009

地质勘探

四川盆地东北部三叠系飞仙关组迁移型鲕滩层序地层分析及相控储层预测

陶夏妍 ,
黄天俊 ,
张艺华 ,
边树涛 ,
魏朋辉 ,
韩嵩 ,
邓惠 ,
蔡强

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1.中国石油西南油气田分公司,四川成都 610051;
2.中国石油工程建设有限公司,四川成都 610041;
3.北京源烃泰克科技有限公司,北京 100102

陶夏妍(1989—),女,高级工程师,2011年毕业于西南石油大学资源勘查工程专业, 2014年毕业于该校矿产普查与勘探专业,获硕士学位,现主要从事碳酸盐岩地质-地震综合研究。

收稿日期: 2023-01-25

修回日期: 2023-09-12

网络出版日期: 2024-01-19

基金资助

四川省自然科学基金“超高压特低孔强非均质碳酸盐岩气藏有效储层物性下限研究”(2023NSFSC0261)

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Sequence Stratigraphical Analysis and Facies-Controlled Reservoir Prediction of Migratory Oolitic Beach in Triassic Feixianguan Formation, Northeastern Sichuan Basin

Tao Xiayan ,
Huang Tianjun ,
Zhang Yihua ,
Bian Shutao ,
Wei Penghui ,
Han Song ,
Deng Hui ,
Cai Qiang

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1. PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610051, China;
2. China Petroleum Engineering & Construction Corporation, Chengdu, Sichuan 610041, China;
3. Geo Seismic Signal Company, Beijing 100102, China

Received date: 2023-01-25

Revised date: 2023-09-12

Online published: 2024-01-19

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摘要

四川盆地东北部七里北—渡口河地区飞仙关组具有较大的油气勘探开发潜力,但高频旋回地震识别及追踪难度大,多期次滩体纵向叠置,储层横向非均质性强,未形成配套的迁移型鲕滩储层分期地震预测方法。针对高频旋回地震识别追踪和鲕滩储层分期地震预测难度大的问题,基于不同地震反射相带分区的方法,进行飞仙关组内部旋回横向精细追踪,精细预测飞仙关组多期次鲕滩储层。研究表明:基于不同地震反射相的层序地层地震反射界面追踪对比法,可以有效地解决高频层序界面识别难题,飞仙关组划分出双轴强反射、内部弱反射、单轴强反射、杂乱-亚平行反射和多轴强反射5类反射地震相;利用振幅和弧长敏感属性定性及神经网络反演定量预测成果,明确优质储层主要发育在Ⅱ旋回,从Ⅱ旋回到Ⅲ旋回,储层具有自东向西、从台地向海槽不断迁移进积发育的规律。实践表明,不同地震反射相的层序地层地震反射界面追踪对比,结合敏感属性控制的储层预测方法,针对迁移型鲕滩储层具有较好的适用性。该研究对同类型气藏储层精细预测具有一定的借鉴意义。

关键词： 高频层序; 鲕滩预测; 飞仙关组; 四川盆地

本文引用格式

陶夏妍 , 黄天俊 , 张艺华 , 边树涛 , 魏朋辉 , 韩嵩 , 邓惠 , 蔡强 . 四川盆地东北部三叠系飞仙关组迁移型鲕滩层序地层分析及相控储层预测[J]. 特种油气藏, 2023 , 30(6) : 62 -71 . DOI: 10.3969/j.issn.1006-6535.2023.06.009

Abstract

A large potential for oil and gas exploration and development is found at the Feixianguan Formation in the Qilibei-Duokouhe area of the northeastern Sichuan Basin, but the high-frequency rotary seismic identification and tracking are difficult, the multi-stage beach body is vertically stacked, and the reservoir has strong lateral non-homogeneity, so a supporting staged seismic prediction method for the migratory oolitic beach reservoir has not been formed. In response to the difficulties of the high-frequency rotary seismic identification and tracking and the staged seismic prediction of oolitic beach reservoirs, the horizontal fine tracking of internal cycles in the Fixianguan Formation was carried out on the basis of the method of zoning different seismic reflection phase zones, to make a fine prediction of multi-stage oolitic beach reservoirs in the Fixianguan Formation. The study shows that the seismic reflection interface tracking and comparison method for the sequence stratum based on different seismic reflection phases can effectively solve the problem of identifying the interface of high-frequency stratigraphic sequences, and the Fixianguan Formation has been divided into five types of seismic reflection phases: biaxial strong reflection, internal weak reflection, uniaxial strong reflection, cluttered-subparallel reflection, and multiaxial strong reflection; the results of the qualitative prediction of amplitude- and arc length-sensitive attributes and the quantitative prediction of the neural network inversion make clear that the high-quality reservoirs mainly develop in the The results of the quantitative prediction using amplitude and arc length sensitive attributes and neural network inversion showed that the high-quality reservoirs are mainly developed in the Cycle Ⅱ, and from the Cycle Ⅱ to the Cycle Ⅲ, and the reservoirs have the pattern of migrating and accumulating from the east to the west, and from the plateau to the trough. The practice has shown that the seismic reflection interface tracking and comparison method for the sequence stratum of different seismic reflection phases, combined with the reservoir prediction method controlled by sensitive attributes, is suitable for the migratory oolitic beach reservoir. This study is also useful for the fine reservoir prediction in the same type of gas reservoirs.

Key words： high-frequency stratigraphic sequence; oolitic beach prediction; Feixianguan Formation; Sichuan Basin

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