An evaluation method of resource potential of in-situ converted shale oil and its application

doi:10.7623/syxb202212006

Acta Petrolei Sinica ›› 2022, Vol. 43 ›› Issue (12): 1750-1757.DOI: 10.7623/syxb202212006

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An evaluation method of resource potential of in-situ converted shale oil and its application

Guo Qiulin, Hou Lianhua, Wang Jian, Liu Zhuangxiaoxue, Luo Xia, Chen Ningsheng

PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received:2021-10-13 Revised:2022-01-07 Online:2022-12-25 Published:2023-01-06

原位转化页岩油资源潜力评价方法及其应用

郭秋麟, 侯连华, 王建, 柳庄小雪, 罗霞, 陈宁生

中国石油勘探开发研究院北京 100083

通讯作者: 柳庄小雪,女,1993年2月生,2018年获美国科罗拉多矿业大学石油地质学专业硕士学位,现为中国石油勘探开发研究院工程师,主要从事油气资源评价研究。Email:liuzxx@petrochina.com.cn
作者简介:郭秋麟,男,1963年9月生,2008年获中国科学院地质与地球物理研究所矿物学、岩石学与矿床学专业博士学位,现为中国石油勘探开发研究院教授级高级工程师,主要从事盆地模拟与油气资源评价研究。Email:qlguo@petrochina.com.cn
基金资助:
中国石油天然气股份有限公司科技重大项目(2021DJ18,2019E-2601)资助。

Abstract

Abstract: The subsurface in-situ converted shale oil has huge resource potential, and it is a strategic potential resource for China’s oil and gas. Based on the theory of hydrocarbon generation and the principle of chemical kinetics, this paper proposes an evaluation model for the resource potential of in-situ converted shale oil, and derives an estimation model of organic porosity after in-situ conversion of shale. Through the research of key parameters, in combination with experimental analysis, it is obtained that the remaining hydrocarbon potential after in-situ conversion of the 7th oil layer of Yanchang Formation (Chang-7 oil layer) shale ranges from 79.92 mg/g to 197.78 mg/g, with an average of 134.67 mg/g, in the evaluation area of Ordos Basin. The oil-gas ratio of the conversion product is 7 to 3. The results indicate the following. (1) The core area of in-situ converted shale oil in the Chang-7 oil layer is 16 932 km², and the total resource equivalent of converted shale oil is 494.0×10⁸t, of which there are 345.8×10⁸t of liquid hydrocarbon and 148.2×10⁸t of gaseous hydrocarbon (oil equivalent). The total producible reserves are 321.1×10⁸t after conversion based on the 65 % empirical recoverable coefficient. (2) The average newly-increased organic porosity in the core of study area is 5.9 % , and the maximum can reach 17.9 % . (3) The sweet spot is mainly distributed in the east of Zhengning area, the east of Huanxian area and the vicinity of Qingcheng area in Ordos Basin. The research method can provide a reference for the resource potential assessment of in-situ converted shale oil and the field pilot test of shale oil in the Chang-7 oil layer.

Key words: shale oil, resource potential, in-situ conversion, resource assessment, Yanchang Formation, Ordos Basin

摘要： 地下原位转化页岩油的资源潜力巨大,是中国油气的战略接替资源。依据生烃理论和化学动力学原理,提出了原位转化页岩油的资源潜力评价模型,推导了页岩原位转化后有机质孔隙度的估算模型。经过关键参数研究,结合实验分析,获得鄂尔多斯盆地评价区延长组7油层组(长7油层组)页岩原位转化后的剩余生烃潜力为79.92~197.78 mg/g,平均为134.67 mg/g;转化产出物的油气比为7∶3。结果揭示:①长7油层组页岩的原位转化页岩油核心区面积为16 932 km²,转化页岩油的总资源当量为494.0×10⁸t,其中,液态烃为345.8×10⁸t,气态烃为148.2×10⁸t(油当量),可采总量按65 % 的经验可采系数换算后为321.1×10⁸t;②核心区平均新增有机质孔隙度为5.9 % ,最大可达17.9 % ;③甜点区主要分布在鄂尔多斯盆地正宁地区以东、环县地区以东和庆城地区附近。研究方法可为原位转化页岩油资源潜力评价与长7油层组页岩油的现场先导试验提供参考。

关键词: 页岩油, 资源潜力, 原位转化, 资源评价, 延长组, 鄂尔多斯盆地

CLC Number:

TE155

Guo Qiulin, Hou Lianhua, Wang Jian, Liu Zhuangxiaoxue, Luo Xia, Chen Ningsheng. An evaluation method of resource potential of in-situ converted shale oil and its application[J]. Acta Petrolei Sinica, 2022, 43(12): 1750-1757.

郭秋麟, 侯连华, 王建, 柳庄小雪, 罗霞, 陈宁生. 原位转化页岩油资源潜力评价方法及其应用[J]. 石油学报, 2022, 43(12): 1750-1757.

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An evaluation method of resource potential of in-situ converted shale oil and its application

原位转化页岩油资源潜力评价方法及其应用

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