油页岩自生热原位转化直井与水平井开发效果数值模拟——以鄂尔多斯盆地旬邑地区油页岩为例

doi:10.7623/syxb202308009

石油学报 ›› 2023, Vol. 44 ›› Issue (8): 1333-1343.DOI: 10.7623/syxb202308009

油页岩自生热原位转化直井与水平井开发效果数值模拟——以鄂尔多斯盆地旬邑地区油页岩为例

杨立红¹, 朱超凡^2,3,4,5, 曾皓¹, 苏建政¹, 王益维¹, 武俊文¹, 陈旭东¹, 郭威^2,3,4,5

1. 中国石油化工股份有限公司石油勘探开发研究院北京 100083;
2. 吉林大学建设工程学院吉林长春 130026;
3. 吉林大学油页岩地下原位转化与钻采技术国家地方联合工程实验室吉林长春 130026;
4. 吉林大学教育部页岩油气资源勘探开发省部共建协同创新中心吉林长春 130026;
5. 吉林大学自然资源部复杂条件钻采技术重点实验室吉林长春 130026

收稿日期:2022-03-31 修回日期:2023-05-11 出版日期:2023-08-25 发布日期:2023-09-06
通讯作者: 郭威,男,1979年11月生,2007年获吉林大学地质工程专业博士学位,现为吉林大学教授,主要从事非常规能源钻采技术研究。Email:guowei6981@jlu.edu.cn
作者简介:杨立红,女,1976年12月生,2005年获中国科学院金属研究所博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事特殊油气田及油页岩开采研究工作。Email:yanglh.syky@sinopec.com
基金资助:
中国石油化工集团有限公司科技部项目（P23159）资助。

Numerical simulation analysis on the development effect of vertical well and horizontal well during oil shale autothermic pyrolysis in-situ conversion process: a case study of oil shale in Xunyi area, Ordos Basin

Yang Lihong¹, Zhu Chaofan^2,3,4,5, Zeng Hao¹, Su Jianzheng¹, Wang Yiwei¹, Wu Junwen¹, Chen Xudong¹, Guo Wei^2,3,4,5

1. Sinopec Petroleum Exploration & Production Research Institute, Beijing 100083, China;
2. College of Construction Engineering, Jilin University, Jilin Changchun 130026, China;
3. National-Local Joint Engineering Laboratory of In-situ Conversion, Drilling and Exploitation Technology for Oil Shale, Jilin Changchun 130026, China;
4. Provincial and Ministerial Co-construction of Collaborative Innovation Center for Shale Oil & Gas Exploration and Development, Jilin University, Jilin Changchun 130026, China;
5. Key Laboratory of Ministry of Natural Resources for Drilling and Exploitation Technology in Complex Conditions, Jilin University, Jilin Changchun 130026, China

Received:2022-03-31 Revised:2023-05-11 Online:2023-08-25 Published:2023-09-06

摘要/Abstract

摘要： 油页岩是重要的化石能源，油页岩原位转化工艺具有绿色环保、占地面积小、开发成本低、可开发深部油页岩资源的优点，是油页岩工业的发展趋势，中国多次原位转化先导试验采用直井方式均成功产出油页岩油，但均出现产量低且不稳定、波及系数小等问题。以鄂尔多斯盆地旬邑地区油页岩为研究对象，运用数值模拟方法对比了油页岩自生热原位转化直井与水平井开发效果差异。研究结果显示，旬邑地区油页岩自生热原位转化局部最高温度均超过1 000℃，含油饱和带主要处于温度范围为250~350℃的区域内，局部最高含油饱和度达到72%，干酪根裂解主要发生在温度达到350℃的地层中，干酪根裂解后孔隙度由6.4%增加至15.5%。其中，直井自生热原位转化累积产油量为432 m³，最高产油量为1.85 m³/d，水平井自生热原位转化累积产油量为7 260 m³，最高产油量为46.7 m³/d。直井自生热原位转化总能量回报率仅有0.79，而水平井自生热原位转化总能量回报率达到2.48，油页岩直井和水平井自生热原位转化最优关井时间分别为第4.5年和第7年。

关键词: 旬邑地区, 油页岩, 原位转化, 直井, 水平井, 能量回报率

Abstract: Oil shale, as a major fossil energy, is an important alternative resource for conventional oil and gas. In-situ conversion process (ICP) is characterized by environmental protection, small footprint and low development cost, which can be used to exploit deep oil shale resources, as being the development trend of oil shale industry. Several in-situ conversion pilot tests in China have successfully produced shale oil by vertical well, yet there are still shortcomings such as low productivity, instability and low sweep efficiency. This paper is a case study of oil shale formation in Xunyi area, and the numerical simulation method is used to compare the development effects of vertical and horizontal wells during autothermic pyrolysis in situ conversion process (ATS) of oil shale. The results show that the local maximum temperature of ATS of oil shale in Xunyi area exceeds 1 000℃. The oil saturation zone is mainly distributed in the temperature range of 250℃ to 350℃, and the local maximum oil saturation can reach 72%. The kerogen cracking mainly occurs in the formation at the temperature of 350℃, and after that the porosity is increased from 6.4% to 15.5%. Specifically, the cumulative oil production during ATS in vertical wells amounts to 432 m³, and the highest daily oil production hits 1.85 m³ per day; the cumulative oil production of horizontal wells is up to 7 260 m³, and the highest daily oil production is 46.7 m³ per day. The total energy return during ATS by vertical wells is only 0.79, while that by horizontal wells is up to 2.48. Moreover, the optimal shut-in time during ATS of oil shale by vertical wells and horizontal wells is after 4.5 years and 7 years, respectively.

Key words: Xunyi area, oil shale, in-situ conversion process (ICP), vertical well, horizontal well, energy return

中图分类号:

TE357

杨立红, 朱超凡, 曾皓, 苏建政, 王益维, 武俊文, 陈旭东, 郭威. 油页岩自生热原位转化直井与水平井开发效果数值模拟——以鄂尔多斯盆地旬邑地区油页岩为例[J]. 石油学报, 2023, 44(8): 1333-1343.

Yang Lihong, Zhu Chaofan, Zeng Hao, Su Jianzheng, Wang Yiwei, Wu Junwen, Chen Xudong, Guo Wei. Numerical simulation analysis on the development effect of vertical well and horizontal well during oil shale autothermic pyrolysis in-situ conversion process: a case study of oil shale in Xunyi area, Ordos Basin[J]. Acta Petrolei Sinica, 2023, 44(8): 1333-1343.

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油页岩自生热原位转化直井与水平井开发效果数值模拟——以鄂尔多斯盆地旬邑地区油页岩为例

Numerical simulation analysis on the development effect of vertical well and horizontal well during oil shale autothermic pyrolysis in-situ conversion process: a case study of oil shale in Xunyi area, Ordos Basin

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