石油勘探与开发 >

2017 , Vol. 44 >Issue 4: 649 - 658

DOI: https://doi.org/10.11698/PED.2017.04.19

学术讨论

页岩储集层综合评价因子及其应用——以四川盆地东南缘焦石坝地区奥陶系五峰组—志留系龙马溪组为例

  • 沈骋 ,
  • 任岚 ,
  • 赵金洲 ,
  • 谭秀成 ,
  • 吴雷泽
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  • 1. 油气藏地质及开发工程国家重点实验室 西南石油大学,成都 610500;
    2. 中国石化江汉油田分公司石油工程技术研究院,武汉 430035
沈骋（1990-）,男,四川成都人,西南石油大学在读博士研究生,主要从事储集层地质与增产改造技术方面的研究工作。地址：四川省成都市新都区新都大道8号,西南石油大学油气藏地质及开发工程国家重点实验室,邮政编码：610500。E-mail：ShenC_Victor@163.com 联系作者简介：赵金洲（1962-）,男,湖北仙桃人,硕士,西南石油大学教授,主要从事油气藏压裂酸化理论与应用方面的教学和科研工作。地址：四川省成都市新都区新都大道8号,西南石油大学,邮政编码：610500。E-mail：zhaojz@swpu.edu.cn

修回日期: 2016-12-11

  网络出版日期: 2017-07-27

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A comprehensive evaluation index for shale reservoirs and its application: A case study of the Ordovician Wufeng Formation to Silurian Longmaxi Formation in southeastern margin of Sichuan Basin, SW China

  • SHEN Cheng1 ,
  • REN Lan1 ,
  • ZHAO Jinzhou1 ,
  • TAN Xiucheng1 ,
  • WU Leize2
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  • 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu 610500, China;
    2. Research Institute of Petroleum Engineering of Jianghan Oilfield Branch of Sinopec Corp., Wuhan 430035, China

Revised date: 2016-12-11

  Online published: 2017-07-27

Supported by

“十三五”国家科技攻关重大专项（2016ZX05060）; 国家自然科学基金（51404204）

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摘要

针对目前页岩储集层评价方法的缺点,提出采用综合评价因子预测优质页岩储集层的分布规律和压裂施工的优势压裂段。综合评价因子由物性评价因子和压裂评价因子采用等效计算方法求得,物性评价因子结合测井得到的岩电参数利用矿物体积模型获取,表征储集层储集性;压裂评价因子利用考虑矿物组分的等效介质模型获取,表征储集层可压裂性。根据综合评价因子,结合岩心宏观、微观特征分析和测井资料,将四川盆地东南缘焦石坝奥陶系五峰组—志留系龙马溪组一段页岩储集层划分为4类储集岩,其中高自生硅页岩和高陆源硅页岩具有较优质的储集性和可压裂性,中陆源硅页岩次之,低陆源硅页岩较差。利用综合评价因子可对生产井水平段测井资料进行解释,分析不同储集岩类型占比,识别具有优质储集性和可压裂性的储集层,预测结果与现场压裂后生产效果对应较好。图13表2参37

关键词： 综合评价因子; 物性评价因子; 压裂评价因子; 页岩储集层; 含气性; 可压裂性; 硅页岩; 焦石坝页岩气; 四川盆地

本文引用格式

沈骋 , 任岚 , 赵金洲 , 谭秀成 , 吴雷泽 . 页岩储集层综合评价因子及其应用——以四川盆地东南缘焦石坝地区奥陶系五峰组—志留系龙马溪组为例[J]. 石油勘探与开发, 2017 , 44(4) : 649 -658 . DOI: 10.11698/PED.2017.04.19

Abstract

Aiming at the disadvantages of existing shale reservoir evaluation methods, a new comprehensive index was proposed to accurately predict the distribution of high quality shale reservoirs and favorable fracturing intervals. The comprehensive index can be calculated using the physical properties index and fracturing index by the equivalent method. Computed by logging rock-electric parameters and mineral bulk physical model, the physical properties index characterizes reservoir property and gas-bearing property; the fracturing index characterizes reservoir fracability and is acquired by equivalent porous medium model considering mineral components. According to the comprehensive index, combined with the macro-micro characteristics of cores and logging data, the shale reservoirs in the Ordovician Wufeng Formation to Silurian Longmaxi Formation of Jiaoshiba area in the southeastern margin of Sichuan Basin are subdivided into four types, the high terrigenous siliceous and high authigenic siliceous types are the best in reservoir property and fracability, followed by the middle siliceous and then low siliceous. The comprehensive index can be used to interpret the logging data of horizontal well to figure out the proportion of reservoirs of different types, identify the spatial distribution of reservoirs with good physical properties and good fracability. The predicted results match well with actual production after fracturing.

Key words： comprehensive evaluation index; physical properties index; fracturing index; shale reservoir; gas-bearing property; fracability; siliceous shale; Jiaoshiba shale gas; Sichuan Basin

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