Recalculation and understanding of middle and low rank coalbed methane reserves: a case study of Baode Coalbed Methane Field on the eastern edge of Ordos Basin
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摘要: 保德煤层气田位于鄂尔多斯盆地东缘晋西挠折带北段，属于典型的中低煤阶煤层气田。2011年，该气田探明煤层气地质储量183.63×108 m3，技术可采储量91.82×108 m3，截至目前，气田已规模开发6年。由于储量计算参数发生了明显变化，需要重新评估储量的动用情况和可动用性。2018年9月，按照储量规范，结合煤层气自身的产出机理和开发特点，利用动态资料，采用体积法复算了地质储量，采用产量递减法和类比法重新标定采收率，对2011年提交的探明储量进行了复算。复算增加煤层气探明储量29.86×108 m3；采收率标定结果为52%，较2011年增加2%；标定技术可采储量110.94×108 m3，较2011年增加19.12×108 m3。储量复算工作需重点说明计算参数的变化情况，在技术可采储量计算以及采收率确定过程中，在已开发的区域需要按照地质条件进行分类计算。Abstract: The Baode Coalbed Methane Field is located in the northern section of Jinxi Flex Belt on the eastern edge of Ordos Basin. It is a typical coal seam gas field of middle and low ranks. In 2011, the gas field proved 18.363×109 m3 of proven geological reserves and 9.182×109 m3 of technically recoverable reserves. The reserve area has been developed on a large scale for 6 years. The reserve calculation parameters have changed significantly, so it is necessary to reassess the utilization and availability of reserves. In September 2018, we recalculated geological reserves using the volume method and dynamic information by combining reserve specification with the output mechanism and development characteristics of coalbed methane. The production decline method and analogy method were used to recalibrate the recovery rate. Then, the proved reserves submitted in 2011 were recalculated. The proved reserves of coalbed methane increased by 2.986×109 m3 after compounding. The recovery calibration result is 52%, up 2% from 2011. The recoverable reserves of calibration technology were 11.094×109 m3, with an increase of 1.912×109 m3 over 2011. Reserve recalculation focuses on the changes in calculation parameters. In the calculation of technical recoverable reserves and the determination of recovery rate, it is necessary to carry out classification and calculation according to geological conditions in the developed area.
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图 1 鄂尔多斯盆地保德煤层气田地理位置
Figure 1. Geographical location of Baode Coalbed Methane Field, Ordos Basin
图 2 鄂尔多斯盆地保德煤层气田储量区主力煤层厚度变化
Figure 2. Variation of main coal seam thickness in the reserve area of Baode Coalbed Methane Field, Ordos Basin
图 3 鄂尔多斯盆地保德煤层气田储量区主力煤层含气量变化图
Figure 3. Variation of gas content of main coal seam in the reserve area of Baode Coalbed Methane Field, Ordos Basin
图 4 鄂尔多斯盆地保德煤层气田储量区2口单采8+9号煤层煤层气井排采曲线
Figure 4. Drainage and production curves of no.8+9 coal beds in two CBM wells in the reserve area of Baode Coalbed Methane Field, Ordos Basin
图 5 鄂尔多斯盆地保德煤层气田储量区计算单元划分
Figure 5. Unit division of the reserve area in Baode Coalbed Methane Field, Ordos Basin
图 6 鄂尔多斯盆地保德煤层气田储量区产量递减法预测曲线
Figure 6. Prediction curves of production decline method in the reserve area of Baode Coalbed Methane Field, Ordos Basin
表 1 鄂尔多斯盆地保德煤层气田已开发区Ⅰ类井与Ⅱ类井条件对比
Table 1. Comparison of type Ⅰ well and type Ⅱ well conditions in the reserve area of Baode Coalbed Methane Field, Ordos Basin
参数 Ⅰ类井 Ⅱ类井 资源条件 4+5号/8+9号煤层厚度/m 8.5/16 8.0/13 4+5号/8+9号煤层含气量/(m3·t-1) 8.2/8.8 7.0/8.1 资源丰度/(108 m3·km-2) 2.2 1.9 保存条件 封盖能力 泥岩为主 泥岩为主 构造 构造简单 构造简单 埋深/m 500~1 000 500~1 000 水文地质条件 矿化度值2 000~5 000 mg/L 矿化度值1 000~4 000 mg/L 可采条件 4+5号煤层/8+9号煤层渗透率/10-3μm2 6.0/4.0 6.0/5.0 最高产水量/(m3·d-1) 37 39 见套压产水量/(m3·d-1) 20.14 24.29 开机压力/MPa 6.24 7.76 临界解吸压力/MPa 5.29 5.18 临储比 0.85 0.66 排采特征 产气量/m3 3 603 2 051 井底压力/MPa 1.477 1.602 
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[1] QIN Yong, MOORE T A, SHEN Jian, et al. Resources and geology of coalbed methane in China: a review[J]. International Geology Review, 2018, 60(5/6): 777-812. [2] TANG Shuheng, LIN Dayang. Resources conditions of coalbed methane districts in China[J]. Acta Geologica Sinica (English Edition), 2000, 74(3): 701-705. [3] LI Wandi, LUO Dongkun, YUAN Jiehui. A new approach for the comprehensive grading of petroleum reserves in China: two natural gas examples[J]. Energy, 2016, 118: 914-926. [4] LANGENBERG C W, BEATON A, BERHANE H. Regional evaluation of the coalbed-methane potential of the Foothills/Mountains of Alberta, Canada[J]. International Journal of Coal Geology, 2006, 65(1/2): 114-128. [5] FA Guifang, YANG Hua, XIA Mingjun, et al. CBM resources/reserves classification and evaluation based on PRMS rules[J]. IOP Conference Series: Earth and Environmental Science, 2018, 121(5): 052080. [6] 叶建平, 秦勇, 林大杨. 中国煤层气资源[M]. 徐州: 中国矿业大学出版社, 1998.YE Jianping, QIN Yong, LIN Dayang. Coalbed methane resources of China[M]. Xuzhou: China University of Mining and Technology Press, 1998. [7] 时华星. 煤型气地质综合研究思路与方法[M]. 北京: 地质出版社, 2004.SHI Huaxing. The train of thought and method of comprehensive study of coalbed methane geology[M]. Beijing: Geological Publishing House, 2004. [8] 李明宅, 徐凤银. 煤层气储量评价方法与计算技术[J]. 勘探技术, 2008(5): 37-44. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200805009.htmLI Mingzhai, XU Fenyin. Evaluating technologies of coalbed methane reserves[J]. Exploration Techniques, 2008(5): 37-44. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200805009.htm [9] 张宇. 黄沙坨油田储量复算研究[J]. 非常规油气, 2016, 3(6): 26-30. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201606005.htmZHANG Yu. Research on the reserves recalculation of Huangshatuo Oilfield[J]. Unconventional Oil & Gas, 2016, 3(6): 26-30. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201606005.htm [10] 候海强. 大老爷府油气田储量复算[D]. 大庆: 东北石油大学, 2016.HOU Haiqiang. Re-calculation on the reserves of Dalaoyefu Oil and Gas Fields[D]. Daqing: Northeast Petroleum University, 2016. [11] 张晓红. 胜利油区储量复算类型分析与实践[J]. 中国石油和化工标准与质量, 2014, 34(6): 201. https://www.cnki.com.cn/Article/CJFDTOTAL-HGBJ201406168.htmZHANG Xiaohong. Analysis and practice of reserve combustion type in Shengli oil area[J]. China Petroleum and Chemical Standard and Quality, 2014, 34(6): 201. https://www.cnki.com.cn/Article/CJFDTOTAL-HGBJ201406168.htm [12] 国土资源部. 煤层气资源/储量规: DZ/T 0216-2010[S]. 北京: 中国标准出版社, 2011.Ministry of Land and Resources. Specifications for coalbed methane resources/reserves: DZ/T 0216-2010[S]. Beijing: China Standard Press, 2011. [13] 李明宅, 杨秀春, 徐文军. 煤层气探明储量计算中的有关技术问题讨论[J]. 中国石油勘探, 2007(1): 87-90. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200701017.htmLI Mingzhai, YANG Xiuchun, XU Wenjun. Discussion on related technical issues of estimating proven coalbed methane reserves[J]. China Petroleum Exploration, 2007(1): 87-90. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200701017.htm [14] 李贵中, 杨健, 王红岩, 等. 煤层气储量计算及其参数评价方法[J]. 天然气工业, 2008, 28(3): 83-84. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200803027.htmLI Guizhong, YANG Jian, WANG Hongyan, et al. Methods for CBM reserve calculation and parameter evaluation[J]. Natural Gas Industry, 2008, 28(3): 83-84. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200803027.htm [15] 郑得文, 张君峰, 孙广伯, 等. 煤层气资源储量评估基础参数研究[J]. 中国石油勘探, 2008, 13(3): 1-4. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200803004.htmZHEN Dewen, ZHANG Junfen, SUN Guangbo, et al. Research on coal-bed methane reserves estimating parameters[J]. China Petroleum Exploration, 2008, 13(3): 1-4. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY200803004.htm [16] YAN Guoqiang, WANG Gang, XIN Lin, et al. Direct fitting measurement of gas content in coalbed and selection of reasonable sampling time[J]. International Journal of Mining Science and Techno-logy, 2017, 27(2): 299-305. [17] 车长波, 邱海峻, 刘成林, 等. 国家层面的煤层气资源评价思路和方法要点[J]. 中国煤层气, 2004, 1(1): 10-12. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGMC200401004.htmCHE Changbo, QIU Haijun, LIU Chenlin, et al. Main points of ideas and methods for CBM resources assessment at state level[J]. China Coalbed Methane, 2004, 1(1): 10-12. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGMC200401004.htm [18] 薛茹, 毛灵涛. 沁水盆地煤层气资源量评价与勘探预测[J]. 中国煤炭, 2007, 33(5): 66-67. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGME200705025.htmXUE Ru, MAO Lingtao. Evaluation and exploration prediction of coal-bed gas resources in Qinshui Basin[J]. Chinese Coal, 2007, 33(5): 66-67. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGME200705025.htm [19] 刘成林, 朱杰, 车长波, 等. 新一轮全国煤层气资源评价方法与结果[J]. 天然气工业, 2009, 29(11): 130-132. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200911046.htmLIU Chenlin, ZHU Jie, CHE Changbo, et al. Methodologies and results of the latest assessment of coalbed methane resources in China[J]. Natural Gas Industry, 2009, 29(11): 130-132. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200911046.htm [20] 王镜惠, 王美冬, 田锋, 等. 高煤阶煤层气储层产气能力定量评价[J]. 油气地质与采收率, 2019, 26(4): 105-110. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201904017.htmWANG Jinghui, WANG Meidong, TIAN Feng, et al. Quantitative evaluation of production capacity of high rank coalbed methane reservoir[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(4): 105-110. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201904017.htm [21] YANG Zhaobiao, LI Yangyang, QIN Yong, et al. Development unit division and favorable area evaluation for joint mining coalbed methane[J]. Petroleum Exploration and Development, 2019, 46(3): 583-593. [22] WANG Jianliang, MOHR S, FENG Lianyong, et al. Analysis of resource potential for China's unconventional gas and forecast for its long-term production growth[J]. Energy Policy, 2016, 88: 389-401. [23] XIE Shan, LAN Yifei, HE Lei, et al. Novel method of production decline analysis[J]. IOP Conference Series: Earth and Environ-mental Science, 2018, 113(1): 012007. [24] 陈元千. 确定气藏可采储量的方法[J]. 中国海上油气(地质), 1991, 5(2): 15-24. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201405012.htmCHEN Yuanqian. The methods of determining recoverable reserves of gas reservoirs[J]. China Offshore Oil & Gas (Geology), 1991, 5(2): 15-24. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201405012.htm [25] 王单华, 姜杉钰, 贾宏伟, 等. 海拉尔盆地旧桥凹陷低煤阶煤层气资源潜力分析[J]. 特种油气藏, 2019, 26(2): 66-70. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201902011.htmWANG Danhua, JIANG Shanyu, JIA Hongwei, et al. Resource potential analysis of low rank coalbed methane in Jiuqiao Sag of Hailar Basin[J]. Special Oil & Gas Reservoirs, 2019, 26(2): 66-70. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201902011.htm [26] 张吉, 史红然, 刘艳侠, 等. 强非均质致密砂岩气藏已动用储量评价新方法[J]. 特种油气藏, 2018, 25(3): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201803001.htmZHANG Ji, SHI Hongran, LIU Yanxia, et al. A new method to evaluate the available reserve of tight sandstone gas reservoir with strong heterogeneity[J]. Special Oil & Gas Reservoirs, 2018, 25(3): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201803001.htm [27] 王勃, 姚红星, 王红娜, 等. 沁水盆地成庄区块煤层气成藏优势及富集高产主控地质因素[J]. 石油与天然气地质, 2018, 39(2): 366-372. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201802016.htmWANG Bo, YAO Hongxing, WANG Hongna, et al. Favorable and major geological controlling factors for coalbed methane accumulation and high production in the Chengzhuang Block, Qinshui Baisn[J]. Oil & Gas Geology, 2018, 39(2): 366-372. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201802016.htm [28] 张亚飞, 张占军, 何东, 等. 产量递减法在煤层气剩余可采资源量评估中的应用[J]. 内蒙古石油化工, 2014, 40(2): 146-148. https://www.cnki.com.cn/Article/CJFDTOTAL-NMSH201402059.htmZHANG Yafei, ZHANG Zhanjun, HE Dong, et al. The application of production decline method in evaluating quantity of remaining recoverable resources of CBM[J]. Inner Mongolia Petrochemical Industry, 2014, 40(2): 146-148. https://www.cnki.com.cn/Article/CJFDTOTAL-NMSH201402059.htm [29] 郑玉柱, 韩宝山. 煤层气采收率的影响因素及确定方法研究[J]. 天然气工业, 2005, 25(1): 120-123. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG20050101D.htmZHEN Yuzhu, HAN Baoshan. Affecting factors and estimating methods of recovery percent of coal-bed gas[J]. Natural Gas Industry, 2005, 25(1): 120-123. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG20050101D.htm [30] 李明宅, 孙晗森. 煤层气采收率预测技术[J]. 天然气工业, 2008, 28(3): 25-29. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200803006.htmLI Mingzhai, SUN Hansen. Methods of predicting CBM recovery factor[J]. Natural Gas Industry, 2008, 28(3): 25-29. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200803006.htm -
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