辽河坳陷大民屯凹陷沙四段页岩油层矿物组分含量反演方法及应用

doi:10.11743/ogg20160106

石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (1): 37-44.doi: 10.11743/ogg20160106

辽河坳陷大民屯凹陷沙四段页岩油层矿物组分含量反演方法及应用

肖佃师^1,2, 卢双舫¹, 陆正元², 张鲁川¹, 郭思祺¹, 谷美维¹

1. 中国石油大学(华东)非常规油气与新能源研究院, 山东青岛 266580;
2. 成都理工大学油气藏地质与开发工程国家重点实验室, 四川成都 610059

收稿日期:2015-05-17 修回日期:2015-08-20 出版日期:2016-02-08 发布日期:2016-03-02
第一作者简介:肖佃师(1981-),男,讲师、博士,复杂储层地球物理评价。E-mail:xiaods1024@163.com。
基金项目:
高校自主创新科研计划项目(13CX05013A);山东省优秀中青年科学家科研奖励基金项目(2014BSE28018)。

Inversion method of shale oil reservoir mineral component content and its application in the Fourth Member of the Shahejie Formation in the Damintun Sag, Liaohe Depression

Xiao Dianshi^1,2, Lu Shuangfang¹, Lu Zhengyuan², Zhang Luchuan¹, Guo Siqi¹, Gu Meiwei¹

1. Institute of Unconventional Oil and Gas and New Energy, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
2. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China

Received:2015-05-17 Revised:2015-08-20 Online:2016-02-08 Published:2016-03-02

摘要/Abstract

摘要： 准确刻画泥页岩中矿物含量是页岩油层脆性评价的关键。泥页岩富含有机质、矿物组分复杂，传统全体积模型解释方法的精度较低。以渤海湾盆地辽河坳陷大民屯凹陷沙四段页岩油为例，根据全岩及地化测试资料，剖析该区泥页岩的岩性、矿物组成及曲线响应特征，构建适用于泥页岩的体积模型及曲线响应方程；采用基于遗传算法的最优化方法对页岩油层进行处理，得到地层的矿物组分含量、孔隙度及干酪根含量等参数。实际处理结果表明，多矿物反演预测的矿物变化趋势与ECS（元素俘获测井）结果一致，其精度明显高于线性拟合。从含油性及可压裂性的角度建立页岩油甜点标准，利用多矿物解释成果有效指导了页岩油甜点层位的优选。

关键词: 体积模型, 矿物组分, 甜点, 页岩油, 大民屯凹陷, 渤海湾盆地

Abstract: Accurate characterization of mineral content is the key to evaluate its fractability for shale oil reservoir.Because of being rich in organic matter and with complex mineral composition,mineral evaluation with traditional volume model method is of low accuracy.This paper took the fourth member of the Shahejie Formation shale-oil reservoir in the Damintun Sag of Liaohe Depression,Bohai Bay Basin as an example.Bulk rock analysis and geochemistry test data were used to analyze lithology,mineral composition and curve response characteristics of the shale-oil reservoir,and then constructed the volume model and logging response equation suitable for the shale-oil reservoir.Genetic algorithm-based optimization method was utilized to calculate mineral composition,porosity and kerogen content.The calculation results showed that the mineral distribution predicted by multi-mineral inversion method was consistent with that of ECS,and its precision was obviously higher than that of linear fitting.The standards of shale-oil sweet spot were built in terms of oil-bearing property and fracability.The multi-mineral interpretation results can effectively guide sweet spot identification of shale oil.

Key words: volume model, mineral component, sweet spot, shale oil, Damintun Sag, Bohai Bay Basin

中图分类号:

TE122.2

肖佃师,卢双舫,陆正元,等. 辽河坳陷大民屯凹陷沙四段页岩油层矿物组分含量反演方法及应用[J]. 石油与天然气地质, 2016, 37(1): 37-44. doi: 10.11743/ogg20160106 Xiao Dianshi,Lu Shuangfang,Lu Zhengyuan,et al. Inversion method of shale oil reservoir mineral component content and its application in the Fourth Member of the Shahejie Formation in the Damintun Sag, Liaohe Depression[J]. Oil & Gas Geology, 2016, 37(1): 37-44. doi: 10.11743/ogg20160106

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辽河坳陷大民屯凹陷沙四段页岩油层矿物组分含量反演方法及应用

Inversion method of shale oil reservoir mineral component content and its application in the Fourth Member of the Shahejie Formation in the Damintun Sag, Liaohe Depression

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