| 油页岩原位开采温度-时间-转化率判识方法及应用 |
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| 引用本文： | 马中良,王强,郑伦举,张彩明.油页岩原位开采温度-时间-转化率判识方法及应用[J].吉林大学学报(地球科学版),2019,49(2):394-399. |
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| 作者姓名： | 马中良 王强 郑伦举 张彩明 |
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| 作者单位： | 1. 页岩油气富集机理与有效开发国家重点实验室, 江苏 无锡 214126;2. 国家能源页岩油研发中心, 江苏 无锡 214126;3. 中国石油化工集团公司油气成藏重点实验室, 江苏 无锡 214126;4. 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所, 江苏 无锡 214126 |
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| 基金项目： | 国家科技重大专项（2017ZX05036002-004，2017ZX05005001-003）；国家能源页岩油研发中心自主研发基金项目（2017） |
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| 摘 要： | 油页岩原位转化开采加热的最终温度、加热时间和最终油气转化率与原位开采的经济成本息息相关。利用Rock-Eval 6型岩石热解分析仪分别获取不同升温速率下的油页岩烃产率-转化率和烃产率-活化能之间的关系，以烃产率为桥梁，建立活化能与转化率的对应关系；在此基础上，依据化学动力学反应原理，将油页岩有机质（干酪根）演化生成油气的过程近似为具一级反应特征的热裂解反应，获取不同转化率条件下温度倒数（1/T）与时间对数（ln t）的关系式，建立油页岩原位转化温度-时间-转化率关系图。以广东茂名盆地油柑窝组油页岩为例，通过上述方法建立了油页岩原位转化开采温度-时间-转化率关系图。由判识关系图可知：加热至350℃开采该区油页岩，转化率达90%需要98 a；加热至200℃开采该区油页岩，在不采取其他措施的情况下即使转化10%也需要147 a。实际情况下，地下油页岩原位受热具有非均质性，加热开采能耗大，通过添加催化剂降低油页岩原位油气转化所需的温度、改善油气产物品质可能是油页岩原位开采技术的一种发展方向。
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| 关 键 词： | 油页岩 原位开采 转化率 页岩油 茂名盆地 |
| 收稿时间： | 2017-07-30 |
Identification Method & Application of Temperature and Heating Time and Hydrocarbon Conversion Rate of Oil Shale In-Situ Mining |
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| Ma Zhongliang,Wang Qiang,Zheng Lunju,Zhang Caiming.Identification Method & Application of Temperature and Heating Time and Hydrocarbon Conversion Rate of Oil Shale In-Situ Mining[J].Journal of Jilin Unviersity:Earth Science Edition,2019,49(2):394-399. |
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| Authors: | Ma Zhongliang Wang Qiang Zheng Lunju Zhang Caiming |
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| Institution: | 1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi 214126, Jiangsu, China;2. State Energy Center for Shale Oil Research and Development, Wuxi 214126, Jiangsu, China;3. Sinopec Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi 214126, Jiangsu, China;4. Wuxi Research Institute of Petroleum Geology, Exploration and Production Research Institute, Sinopec, Wuxi 214126, Jiangsu, China |
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| Abstract: | The final temperature, heating time and the final oil and gas conversion rate of in-situ transformation of oil shale are closely related to the economic cost of in-situ mining. The relationship between hydrocarbon yield-conversion rate and hydrocarbon yield-activation energy of oil shale under different heating rates was obtained by using Rock-Eval 6 rock pyrolysis analyzer. The relationship between activation energy and conversion rate was established based on hydrocarbon yield. Further, based on the principle of chemical kinetics, the process of oil shale organic matter (kerogen) evolution was approximated to the thermal cracking reaction with the first-order reaction characteristics, and the relationship between reciprocal of temperature (1/T) and logarithm of heating time (ln t) under different conversion rates was obtained, and the temperature-time-conversion diagram of in-situ conversion of oil shale was established. Taking the oil shale of E2-3 y Formation in Maoming Basin of Guangdong Province as an example, the temperature-time-conversion diagram of oil shale was drawn by the above method. It is shown that it would take 98 years to extract oil shale in this area by heating to 350℃ with 90% conversion rate, and 147 years to heat to 200℃ with 10% conversion rate without other measures. In fact, the in-situ heating of underground oil shale is heterogeneous,and the energy consumption of heating is large. It is possible to reduce the temperature and improve the quality of oil shale by adding catalyst to oil shale in-situ production. |
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| Keywords: | oil shale in-situ mining conversion rate shale oil Maoming basin |
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