基于三维地震数据的短期旋回内薄层砂体的预测

赵长永; 陈希光; 李俊飞; 宋志华; 常少英; 单祥; 郭华军; 厚刚福

doi:10.3969/j.issn.1006-6535.2023.06.006

特种油气藏 >

2023 , Vol. 30 >Issue 6: 40 - 47

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.06.006

地质勘探

基于三维地震数据的短期旋回内薄层砂体的预测

赵长永 ,
陈希光 ,
李俊飞 ,
宋志华 ,
常少英 ,
单祥 ,
郭华军 ,
厚刚福

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1.中国石油新疆油田分公司,新疆克拉玛依 834000;
2.中国石油杭州地质研究院,浙江杭州 310000

赵长永(1980—),男,高级工程师,2003年毕业于长江大学资源勘查与工程专业,2006年毕业于该校矿物学、岩石学、矿床学专业,获硕士学位,现主要从事油气勘探工作。

收稿日期: 2023-02-14

修回日期: 2023-09-01

网络出版日期: 2024-01-19

基金资助

中国石油“十四五”前瞻性基础性重大科技项目“深层超深层有效储层形成主控因素与预测技术研究”(2021DJ0202);2022年新疆维吾尔自治区“天山英才”培养计划

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Application in the Prediction of Thin Sand Body Within Short-term Sequence Cycle Based on 3D Seismic Data

Zhao Changyong ,
Chen Xiguang ,
Li Junfei ,
Song Zhihua ,
Chang Shaoying ,
Shan Xiang ,
Guo Huajun ,
Hou Gangfu

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1. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
2. PetroChina Hangzhou Geological Research Institute, Hangzhou, Zhejiang 310000, China

Received date: 2023-02-14

Revised date: 2023-09-01

Online published: 2024-01-19

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摘要

准噶尔盆地腹部地区白垩系清水河组广泛发育薄层砂体,储层厚度约为10～20 m,由于地震资料分辨率不足,薄层砂体预测难度较大。为此,通过测井曲线、钻井等资料,以高分辨率层序地层学原理为指导,将白垩系清水河组一段划分为1个长期旋回、2个中期旋回、6个短期旋回。在每个短期旋回内,利用地震切片技术优选了6个地震反演切片,通过此方法识别了准噶尔盆地腹部地区清水河组一段(厚度约为140 m)内低位期、湖侵期、高位期、湖退期、湖侵期、湖泛期6个不同时期砂体的沉积演化特征。研究结果表明:准噶尔腹部地区地震资料可识别精度为中期旋回,在地震等时界面内提取多张地震反演切片,选取与井的短期旋回相对应的反演切片,6张反演切片有效地识别了短期旋回内薄层砂体的空间展布和叠置关系,把井的高频信息充分扩展到整个空间上。该方法既发挥地震资料的横向分辨率,又发挥了井的高分辨率的作用,克服了地震分辨率的不足,深化了对短期旋回内薄层砂体沉积规律的研究,取得了良好的勘探效果。

关键词： 薄层; 砂体预测; 短期旋回; 高分辨率层序地层学; 地震切片; 准噶尔盆地

本文引用格式

赵长永 , 陈希光 , 李俊飞 , 宋志华 , 常少英 , 单祥 , 郭华军 , 厚刚福 . 基于三维地震数据的短期旋回内薄层砂体的预测[J]. 特种油气藏, 2023 , 30(6) : 40 -47 . DOI: 10.3969/j.issn.1006-6535.2023.06.006

Abstract

Thin sand bodies are widely developed in the Cretaceous Qingshuihe Formation in the hinterland of Junggar Basin, and the thickness of the reservoir is about 10-20 m. The prediction of thin sand bodies is difficult due to the lack of discernible seismic data. With the data from logging curves and well drilling, and under the guidance of the principle of high-resolution sequence stratigraphy, the first member of the Cretaceous Qingshuihe Formation was divided into 1 long-term cycle, 2 medium-term cycles, and 6 short-term cycles. Within each short-term cycle, 6 seismic inversion slices were preferentially selected through the seismic slicing technique. By this method, the sedimentary evolution characteristics of sand bodies in six different periods, namely, low level period, lake intrusion period, high level period, lake recession period, lake intrusion period, and lake flooding period, within the first member of the Qingshuihe Formation (about 140 m thick) in the hinterland of the Junggar Basin, were identified, thus reducing the multiplicity of interpretations of the seismic data. This paper combines seismic slicing and high-resolution sequence stratigraphy, plays the role of lateral resolution of seismic data and high-resolution of wells, overcomes the lack of seismic resolution, deepens the research on the identification of thin sand body and depositional law in short-term cycle, achieves a good exploration effect, guides the deployment of wells in the field, and serves as a reference for the identification of thin bed in other areas.

Key words： thin bed, sand body prediction, short-term cycle, high-resolution sequence stratigraphy, seismic slicing, Junggar Basin

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