Application of rock desorbed gas determinator in shale gas exploration

Abstract

Abstract: As an important parameter as well as difficult problem in shale exploration, gas content of the reservoir determines whether the reservoir is economical for shale gas development. Field desorption is a direct and common method. Enhancement of absorbed gas measurement accuracy is critical for accurate evaluation of shale gas content. Conventional field desorption devices are less accurate and less automatic. Under such circumstance, a rock desorbed gas determinator has been independently developed. In this paper, the principles, measurement process and calculation of shale gas content of the determinator were presented, and it was verified that the determinator can produce reliable analysis results. The rock desorbed gas determinator was successfully deployed in Well CY1 in 2014, thereby providing valuable reference for identification of “low-risk zones”.

Key words: rock desorbed gas determinator, shale gas, desorbed gas, lost gas, residual gas

Yang Mingqing, Liu Jie, Ren Shoumai, Huang Zijian, Meng Fanyang, Wu Fei, Shao Guangyu. Application of rock desorbed gas determinator in shale gas exploration[J]. China Petroleum Exploration, 2016, 21(6): 120-124.

References

[1] 张金川，林腊梅，李玉喜，等．页岩气资源评价方法与技术：概率体积法[J]．地学前缘，2012,19(2):184-191． Zhang Jinchuan, Lin Lamei, Li Yuxi, et al. The method of shale gas assessment: probability volume method[J]. Earth Science Frontiers, 2012,19(12):84-191.
[2] 李玉喜，乔德武，姜文利，等．页岩气含气量和页岩气地质评价综述[J]．地质通报，2011,30(2/3):308-317． Li Yuxi, Qiao Dewu, Jiang Wenli, et al. Gas content of gas-bearing shale and its geological evaluation summary[J]. Geological Bulletin of China, 2011,30(2/3):308-317.
[3] 邹才能，董大忠，王社教，等．中国页岩气形成机理、地质特征及资源潜力[J]．石油勘探与开发，2010,37(6):641-653． Zou Caineng, Dong Dazhong, Wang Shejiao, et al. Geological characteristics, formation mechanism and resource potential of shale gas in China[J]. Petroleum Exploration and Development, 2010,37(6):641-653.
[4] 陈晓智，陈桂华，肖钢，等. 北美TMS页岩油地质评价及勘探有利区预测[J]. 中国石油勘探，2014,19(2):77-84. Chen Xiaozhi, Chen Guihua, Xiao Gang, et al. Geological evaluation prediction of favorable exploration zones of TMS shale oil in North America[J]. China Petroleum Exploration, 2014,19(2):77-84.
[5] Ulery J P，Hyman D M．The modified direct method of gas content determination：application and results[C]. Proceedings of the 1991 coalbed methane symposium，Tuscaloosa，1991.
[6] McLennan J D, Schafer P S, Pratt T J. A guide to determining coalbed gas content[M]. Chicago, US: Gas Research Institute, 1995.
[7] Kissell F N, McCulloch C M, Elder C H. The direct method of determinning methane content of coalbeds ventilation design[M]. Washington D C: National lnstitute for Occupational Safety and Health (NIOSH), 1973.
[8] 黄锐，张新华，秦黎明. 基于元素含量的页岩矿物成分及脆性评价方法[J]. 中国石油勘探，2014,19(2):85-90. Huang Rui, Zhang Xinhua, Qin Liming. Method for evaluation of shale mineral components and brittleness on basis of element content[J]. China Petroleum Exploration, 2014,19(2):85-90.
[9] 王娟. 轻质烃组分的低温密闭抽提技术及其在页岩油资源评价中的应用[J]. 中国石油勘探，2015,20(3):58-63. Wang Juan. Low-temperature closed extraction technology of light hydrocarbons and its application in evaluation of shale oil resource[J]. China Petroleum Exploration, 2015,20(3):58-63.
[10] 梁彬，姜汉桥，李俊键，等. 考虑多因素的页岩气吸附能力计算模型[J].特种油气藏，2015,22(1):121-123. Liang Bin, Jiang Hanqiao, Li Junjian, et al.Calculation model of multi-factor shale gas adsorption capacity[J]. Special Oil & Gas Reservoirs, 2015,22(1):121-123.
[11] 吴奇，梁兴，鲜成钢，等. 地质—工程一体化高效开发中国南方海相页岩气[J].中国石油勘探，2015,20(4):1-23. Wu Qi, Liang Xing, Xian Chenggang, et al. Geoscience-to-production integration ensures effective and efficient south China marine shale gas development[J]. China Petroleum Exploration, 2015,20(4):1-23.
[12] 唐颖，张金川，刘珠江，等．解吸法测量页岩含气量及其方法的改进[J]. 天然气工业，2011,31(10):108-112． Tang Ying, Zhang Jinchuan, Liu Zhujiang, et al. Use and improvement of desorption method in shale gas content tests[J]. Natural Gas Industry, 2011,31(10):108-112.
[13] 闫高原，朱炎铭，王阳，等. 贵州凤冈区牛蹄塘组页岩气成藏条件分析[J]. 特种油气藏，2014,21(6):75-78. Yan Gaoyuan, Zhu Yanming, Wang Yang, et al. Analysis of shale gas accumulation conditions of Niutitang Fm in Fenggang area, Guizhou[J]. Special Oil & Gas Reservoirs, 2014,21(6):75-78.
[14] 孔庆虎，宋洪柱．煤层气含量测试技术及测试质量影响因素分析[J]. 中国煤层气，2012,9(5):17-19． Kong Qinghu，Song Hongzhu. Gas content testing technology and analysis of factors influencing the quality of Testing[J]. China Coalbed Methane, 2012,9(5):17-19.
[15] Kissell，Meculloch F N．The direct method of determining methane content of coalbeds for Ventilation design[R]．U．S．Bureau of Mines Report of Investigations，RI7767，1973．
[16] 任收麦，杨仁政，张毅，等．含气量连续测量装置：中国，ZL201420323357.9[P]. 2014-06-17． Ren Shoumai, Yang Renzheng, Zhangyi, et al. Continuous measurement equipment of gas content: China, ZL201420323357.9[P]. 2014-06-17．