黔北正安区块牛栏组基于叠后地震属性的多尺度裂缝预测

蓝宝锋; 黄艺; 张福; 李刚权; 刘婷; 张金川

doi:10.3969/j.issn.1006-6535.2020.05.012

特种油气藏 >

2020 , Vol. 27 >Issue 5: 81 - 87

DOI: https://doi.org/10.3969/j.issn.1006-6535.2020.05.012

地质勘探

黔北正安区块牛栏组基于叠后地震属性的多尺度裂缝预测

蓝宝锋 ,
黄艺 ,
张福 ,
李刚权 ,
刘婷 ,
张金川

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1.贵州页岩气勘探开发有限责任公司,贵州贵阳 550008;
2.贵州省土地矿产资源储备局,贵州贵阳 550008;
3.贵州乌江能源集团有限责任公司,贵州贵阳 550008;
4.中国地质大学(北京),北京 100083

蓝宝锋(1981—),男,高级工程师,2004年毕业于成都理工大学地质学专业,2011年毕业于中国地质大学(北京)地质工程专业,获硕士学位,现从事非常规油气生产、科研和勘探开发管理工作。

收稿日期: 2020-04-16

修回日期: 2020-07-10

网络出版日期: 2022-02-18

基金资助

贵州省科学技术基金项目“贵州省务正道地区页岩气资源潜力及有利区分析”(黔科合基础「2016」1409);贵州省地勘基金项目“黔北地区石牛栏组下段沉积环境研究及有利储集相带分析”(GZMC-ZG20192014-4);贵州乌江能源集团重点科技攻关项目“黔北地区页岩气地质评价与配套工艺技术研究”(2020-1)

收起

Multi-scale Fracture Prediction of Shiniulan Formation in Zheng'an Block of Northern Guizhou Province Based on Post-stack Seismic Attributes

Lan Baofeng ,
Huang Yi ,
Zhang Fu ,
Li Gangquan ,
Liu Ting ,
Zhang Jinchuan

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1. Guizhou Shale Gas Exploration and Development Co., Ltd, Guiyang,Guizhou 550008 ,China;
2. Guizhou Provincial Bureau of Land and Mineral Resources Reserve, Guiyang , Guizhou 550008,China;
3. Guizhou Wujiang Energy Group Co., Ltd, Guiyang , Guizhou 550008,China;
4. China University of Geosciences (Beijing), Beijing 100083,China

Received date: 2020-04-16

Revised date: 2020-07-10

Online published: 2022-02-18

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摘要

黔北正安地区安场向斜石牛栏组为一套深水陆棚沉积的泥灰岩地层,前期钻探显示,石牛栏组气藏分布与裂缝发育程度密切相关,为典型的裂缝型气藏。为进一步对安场向斜石牛栏组储层的裂缝平面展布规律进行研究,该文通过岩心、成像测井等资料分析目的层的裂缝发育特征,优选裂缝预测敏感地震属性,基于地震像素处理的裂缝增强属性对石牛栏组裂缝分布进行了预测。研究结果表明:利用常规的地震曲率属性预测裂缝识别能力有限,而基于地震像素处理的地震数据能够有效改善小断层及构造形变特征成像,在此基础上开展的裂缝增强属性可大大提高裂缝的识别能力,经实钻井验证,基于叠后地震属性裂缝分布预测方法的结果与钻井泥浆漏失点综合吻合率达83.3%以上,预测结果较为可靠,该研究为石牛栏组区带优选及钻井风险预警提供了技术支撑。

关键词： 泥灰岩; 地震优化; 裂缝气藏; 增强属性; 正安地区; 石牛栏组

本文引用格式

蓝宝锋 , 黄艺 , 张福 , 李刚权 , 刘婷 , 张金川 . 黔北正安区块牛栏组基于叠后地震属性的多尺度裂缝预测[J]. 特种油气藏, 2020 , 27(5) : 81 -87 . DOI: 10.3969/j.issn.1006-6535.2020.05.012

Abstract

The Shiniulan Formation of Anchang syncline in Zheng'an Area of northern Guizhou Province is a set of marl strata deposited in deep-water shelf. Previous drilling results show that the distribution of the typical fractured gas reservoirs in the Shiniulan Formation is closely related to the degree of fracture development. In order to further study the fracture plane distribution law of the Shiniulan reservoir in Anchang syncline, the authors analyzed the fracture development characteristics of the target layers through core and imaging logging data, optimized the seismic attributes sensitive to fracture prediction, and predicted the fracture distribution of the Shiniulan Formation by using the fracture enhancement attribute based on seismic pixel processing. The research results show that the ability to identify fractures using conventional seismic curvature attributes is limited, and the seismic data based on seismic pixel processing can effectively improve the imaging of small faults and structural deformation features. On this basis, the recognition ability of fracture enhancement attributes is greatly improved. The actual drilling results verify that the comprehensive coincidence rate between the fracture prediction results based on post-stack seismic attributes and the leakage points of drilling mud is more than 83.3%, thus the prediction result is reliable. This study provides technical supports for optimizing zones and early warning of drilling risk in the Shiniulan Formation.

Key words： marl; seismic optimization; fractured gas reservoir; enhanced attribute; Zheng'an Area; Shiniulan Formation

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