基于笔石带特征的页岩等时地层测井划分方法及意义——以四川盆地及其周缘五峰组—龙马溪组为例

doi:10.7623/syxb202003002

石油学报 ›› 2020, Vol. 41 ›› Issue (3): 273-283.DOI: 10.7623/syxb202003002

基于笔石带特征的页岩等时地层测井划分方法及意义——以四川盆地及其周缘五峰组—龙马溪组为例

聂海宽^1,2,3, 李东晖^1,2,3, 姜涛⁴, 颜彩娜⁵, 杜伟^1,2,3, 张光荣⁵

1. 页岩油气富集机理与有效开发国家重点实验室北京 100083;
2. 中国石油化工股份有限公司石油勘探开发研究院北京 100083;
3. 中国石油化工集团公司页岩油气勘探开发重点实验室北京 100083;
4. 北京大学地球与空间科学学院北京 100871;
5. 中国地质大学(北京)能源学院北京 100083

收稿日期:2019-01-22 修回日期:2019-07-19 出版日期:2020-03-25 发布日期:2020-04-03
通讯作者: 聂海宽,男,1982年4月生,2005年获中国地质大学(北京)石油工程专业学士学位,2010年获中国地质大学(北京)矿产普查与勘探专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院研究员,主要从事非常规油气地质研究工作。Email:niehk.syky@sinopec.com
作者简介:聂海宽,男,1982年4月生,2005年获中国地质大学(北京)石油工程专业学士学位,2010年获中国地质大学(北京)矿产普查与勘探专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院研究员,主要从事非常规油气地质研究工作。Email:niehk.syky@sinopec.com
基金资助:
国家科技重大专项（2016ZX05061-001）和国家自然科学基金项目（No.41872124、No.41202103）资助。

Logging isochronous stratigraphic division of shale based on characteristics of graptolite zones and its significance: a case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin and its periphery

Nie Haikuan^1,2,3, Li Donghui^1,2,3, Jiang Tao⁴, Yan Caina⁵, Du Wei^1,2,3, Zhang Guangrong⁵

1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China;
2. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China;
3. Sinopec Key Laboratory of Shale Oil/Gas Exploration & Production, Beijing 100083, China;
4. School of Earth and Space Sciences, Peking University, Beijing 100871, China;
5. School of Energy Resources, China University of Geosciences, Beijing 100083, China

Received:2019-01-22 Revised:2019-07-19 Online:2020-03-25 Published:2020-04-03

摘要/Abstract

摘要：

上奥陶统五峰组-下志留统龙马溪组页岩生物地层研究中，笔石作为全球公认的主导门类，为五峰组-龙马溪组页岩的精细划分提供依据。在四川盆地及其周缘地区，五峰组-龙马溪组的WF2-LM4笔石带页岩是页岩气的富集高产层段，目前主要通过岩心鉴定来划分笔石带，但取心井数量少限制了这一技术的大规模推广应用。为了克服现有技术的不足，有必要开发一种基于笔石带特征的页岩等时地层测井划分方法及系统，以达到快速、精准评价页岩气高产层段的目的。技术上，可通过标准井的笔石鉴定确定研究区的笔石带类型与自然伽马（GR）测井曲线的对应关系；对于研究区的新井，可根据GR测井曲线的各个局部峰初步确定各个笔石带的位置；某个局部峰在向上（浅层）方向上邻近的局部极小值或极大值所对应的半幅值可确定为该局部峰值所对应笔石带的上边界，也即上覆笔石带的下边界。平面上可依据沉积环境和沉积相首先划分出不同的地层分区，再在每个分区分别建立标准井笔石带与GR测井曲线的对应关系。页岩笔石带的测井划分方案能够对五峰组-龙马溪组页岩气富集高产层段的纵向和平面分布进行快速划分，为预测和评价页岩气勘探开发的富集高产层段提供技术手段。

关键词: 页岩气, 笔石带, 等时地层, 五峰组&mdash, 龙马溪组, 四川盆地

Abstract:

In the biostratigraphic research of the Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation shale, graptolite is globally recognized as the dominant species, providing a basis for the fine division of shale in Wufeng-Longmaxi formations. In Sichuan Basin and its periphery, the WF2-LM4 graptolite zones in Wufeng-Longmaxi formations are the shale gas enrichment and high-yield intervals. Currently, graptolite zones are mainly divided by core identification. However, the large-scale application of this technology is limited by the sparse coring wells. In order to overcome the shortcomings of the existing technology, it is necessary to develop a logging division method and system for the isochronous shale strata based on the characteristics of graptolite zones, thus achieving the rapid and accurate evaluation of the shale gas high-yield interval. From the perspective of technology, the correspondence between the types of graptolite zones of the study area and the natural gamma-ray (GR) logging curve can be determined through the identification of graptolites in standard wells. For new wells in the study area, the position of each graptolite zone can be preliminarily determined according to the local peaks of GR curve. The half amplitude corresponding to the local minimum or maximum value adjacent to a local peak in the upward direction (to shallow layer) can be determined as the upper boundary of the graptolite zone corresponding to the local peak, namely the lower boundary of the overlying graptolite zone. On the plane, different stratigraphic zones can be divided according to sedimentary environments and facies, and then the correspondence between graptolite zones of standard wells and GR curves is established in each zone. The longitudinal and horizontal distribution of the shale gas enrichment and high-yield intervals in Wufeng-Longmaxi formations can be quickly determined by the logging division scheme of graptolite zone, providing technical means for predicting and evaluating the shale gas enrichment and high yield intervals in exploration and development.

Key words: shale gas, graptolite zone, isochronous strata, Wufeng Formation-Longmaxi Formation, Sichuan Basin

中图分类号:

TE121.3

聂海宽, 李东晖, 姜涛, 颜彩娜, 杜伟, 张光荣. 基于笔石带特征的页岩等时地层测井划分方法及意义——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2020, 41(3): 273-283.

Nie Haikuan, Li Donghui, Jiang Tao, Yan Caina, Du Wei, Zhang Guangrong. Logging isochronous stratigraphic division of shale based on characteristics of graptolite zones and its significance: a case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin and its periphery[J]. Acta Petrolei Sinica, 2020, 41(3): 273-283.

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基于笔石带特征的页岩等时地层测井划分方法及意义——以四川盆地及其周缘五峰组—龙马溪组为例

Logging isochronous stratigraphic division of shale based on characteristics of graptolite zones and its significance: a case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin and its periphery

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