致密油藏可采储量概率快速评估方法——以红河油田长8油藏为例

郭鸣黎; 陈艳; 郑振恒; 李军; 喻莲; 刘丽琼

doi:10.11781/sysydz202101154

致密油藏可采储量概率快速评估方法——以红河油田长8油藏为例

doi: 10.11781/sysydz202101154

1.
中国石化石油勘探开发研究院, 北京 100083
2.
中国石化华北油气分公司勘探开发研究院, 郑州 450006

基金项目:

中国石化科技部项目“石油控制储量升级评价技术及潜力研究” P18055-4

详细信息

作者简介:
郭鸣黎(1972-), 女, 博士, 高级工程师, 从事储量评估和评价的管理和研究。E-mail: guoml.syky@sinopec.com

中图分类号: TE328
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-15
- 修回日期: 2020-12-21
- 刊出日期: 2021-01-28

Rapid evaluation of probable recoverable reserves in tight reservoirs: a case study of Chang 8 reservoir (eighth member of Yanchang Formation) in Honghe oil field

1.
SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
2.
Exploration and Development Institute of North China Branch Company, SINOPEC, Zhengzhou, Henan 457006, China

摘要

摘要: 致密油藏储层致密、大面积含油、局部“甜点”富集、油水分布复杂以及后期工程改造带来的储层复杂性，决定了其单井开发动态与可采储量分布具有较大的差异性和较强的不确定性，很难用常规的储量评估方法得出合理的确定性认识。通过引入北美对非常规页岩油气藏储量的评估方法，采用已开发井确定单井储量，再用已开发井储量的概率分布特征来表征区块或者油气藏的储量。对红河油田长8致密特低渗油藏进行了研究，跟踪单井的初期生产动态和产量递减特征，分析可采储量与地质特征、含油性和初期生产动态的相关性，来寻找影响可采储量估算的关键因素。用P₁₀/P₉₀值来判断数据的不确定性，其值在3~8，可获得90%的置信度所需最小的样本量；该值如大于10，说明油藏具有地质、工程改造的复杂性和不同区块的差异性。通过不确定性法建立了关键影响参数和单井可采储量的概率分布，实现了单井可采储量的快速评估和评价。
- 开发动态 /
- 可采储量 /
- 概率分布 /
- 储量评估 /
- 致密油藏 /
- 红河油田
Abstract: Tight oil reservoirs are featured by tight formations, large oil area, locally enriched "sweet spots", complex oil-water distribution, and complicated reservoir conditions brought by later engineering transformation, which determines the development performance of single well. The distribution of recoverable reserves has great variability and uncertainty, so it is difficult to obtain a reasonable and definite understanding using conventional reserve evaluation methods. By introducing the evaluation methods of unconventional shale oil and gas reserves in North America, the developed wells were used to determine the reserves of single wells, and the probability distribution characteristics of reserves of developed wells were used to characterize the reserves of blocks or reservoirs. The Chang 8 (the eight member of Yanchang Formation) tight and ultra-low permeability reservoir in the Honghe oil field was studied. The initial production performance and production decline characteristics of a single well were tracked, and the correlations between recoverable reserves and geological characteristics, oil-bearing properties and initial production performance were analyzed to determine the key factors affecting the estimation of recoverable reserves. The P₁₀/P₉₀ values were used to judge the uncertainty of the estimates. The minimum sample size required for 90% confidence can be obtained when the value is 3-8; if the value is greater than 10, it indicates that the reservoir has the complexity of geological and engineering transformation and the difference of different blocks. The key influencing parameters and the probability distribution of recoverable reserves of single well were established by using the uncertainty method, and the rapid evaluation of recoverable reserves of a single well were realized.
- development performance /
- recoverable reserves /
- probability distribution /
- reserve evaluation /
- tight reservoir /
- Honghe oil field

HTML全文

图 1 红河油田某井区归一化典型水平井产量递减特征

Figure 1. Normalized production decline curves of typical wells in a certain block of Honghe oil field

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图 2 红河油田长8油藏单井产量不同递减规律特征

Figure 2. Production decline patterns of wells in Chang 8 reservoir in Honghe oil field

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图 3 红河油田长8油藏单井可采储量与静态参数的相关性

Figure 3. Correlation between single well recoverable reserves (EUR) and static parameters in Chang 8 reservoir in Honghe oil field

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图 4 红河油田长8油藏单井可采储量与动态参数的相关性

Figure 4. Correlation between single well recoverable reserves (EUR) and dynamic parameters in Chang 8 reservoir in Honghe oil field

下载: 全尺寸图片幻灯片

图 5 红河油田某区块长8油藏单井可采储量、初始产量、半年累产量和半年含水率概率分布

Figure 5. Probability distribution of a single well EUR, initial production, half-year cumulative production and half-year water content in Chang 8 reservoir in Honghe oil field

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表 1 红河油田长8油藏不同初产规模的产量递减参数

Table 1. Comparison of production decline parameters of Chang 8 reservoir with different initial production scales in Honghe oil field

单井分类	井数/口	递减类型	第一段递减率/%	第二段递减率/%	平均单井前6个月累产/t	前6个月平均含水率/%	单井可采储量(EUR)/t
>10 t/d	52	指数	71.81	48.76	2 584.50	64.16	7 189
5~10 t/d	44	指数	73.96	39.29	1 226.60	73.02	3 646
< 5 t/d	168	指数	47.85	19.64	311.39	87.53	2 021

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表 2 SPEE专著三推荐的最小样本量

Table 2. Recommended minimum sample size in monograph 3 by SPEE

P₁₀/P₉₀值	推荐样本量	备注
2	15	不太可能出现的比率
3	35	常见比率
4	60	常见比率
5	75	常见比率
6	100	常见比率
8	130	常见比率
10	170	可能的数据质量/模拟问题
15	290	可能的数据质量/模拟问题
20	420	可能的数据质量/模拟问题
30	670	可能的数据质量/模拟问题

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表 3 红河油田长8油藏单井可采储量及关键影响因素概率统计

Table 3. Statistical results of a single well EUR and key influencing factors in Chang 8 reservoir, Honghe oil field

不同概率	单井可采储量/t	初始产量/(t·d^-1)	半年累产量/t	半年平均含水率/%
P₉₀	558.0	1.5	199.2	99.0
P₅₀	2 642.1	5.7	834.0	51.4
P₁₀	12 509.8	21.1	3 491.4	24.1
分析平均值	5 516.0	9.6	1 556.8	61.1
算数平均值	4 291.8	7.9	1 201.1	55.1
P₁₀/P₉₀	22.4	13.6	17.5	4.5

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表 4 红河油田某区块长8油藏单井可采储量(EUR)及关键影响因素概率统计

Table 4. Statistical results of single well EUR and key influencing factors in Chang 8 reservoir, Honghe oil field

不同概率	单井可采储量/t	初始产量/(t·d^-1)	半年累产量/t	半年平均含水率/%
P₉₀	2 567.6	3.1	287.4	87.6
P₅₀	5 624.9	8.3	1 187.3	39.8
P₁₀	12 322.8	22.0	4 904.7	18.0
分析平均值	6 783.2	11.1	2 190.8	48.1
算数平均值	6 301.2	9.6	1 643.3	43.2
P₁₀/P₉₀	4.8	7.1	17.1	4.9

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参考文献(22)

[1]	郭智, 贾爱林, 冀光, 等. 致密砂岩气田储量分类及井网加密调整方法: 以苏里格气田为例[J]. 石油学报, 2017, 38(11): 1299-1309. doi: 10.7623/syxb201711009 GUO Zhi, JIA Ailin, JI Guang, et al. Reserve classification and well pattern infilling method of tight sandstone gasfield: a case study of Sulige gasfield[J]. Acta Petrolei Sinica, 2017, 38(11): 1299-1309. doi: 10.7623/syxb201711009
[2]	邹才能, 朱如凯, 吴松涛, 等. 常规与非常规油气聚集类型、特征、机理及展望: 以中国致密油和致密气为例[J]. 石油学报, 2012, 33(2): 173-187. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201202002.htm ZOU Caineng, ZHU Rukai, WU Songtao, et al. Types, characte-ristics, genesis and prospects of conventional and unconventional hydrocarbon accumulations: taking tight oil and tight gas in China as an instance[J]. Acta Petrolei Sinica, 2012, 33(2): 173-187. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201202002.htm
[3]	郭永奇, 铁成军. 巴肯致密油特征研究及对我国致密油勘探开发的启示[J]. 辽宁化工, 2013, 42(3): 309-312. https://www.cnki.com.cn/Article/CJFDTOTAL-LNHG201303041.htm GUO Yongqi, TIE Chengjun. Study on characteristics of Bakken tight oil and its revelation for exploration and development of tight oil in China[J]. Liaoning Chemical Industry, 2013, 42(3): 309-312. https://www.cnki.com.cn/Article/CJFDTOTAL-LNHG201303041.htm
[4]	任战利, 李文厚, 梁宇, 等. 鄂尔多斯盆地东南部延长组致密油成藏条件及主控因素[J]. 石油与天然气地质, 2014, 35(2): 190-198. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201402005.htm REN Zhanli, LI Wenhou, LIANG Yu, et al. Tight oil reservoir formation conditions and main controlling factors of Yanchang Formation in southeastern Ordos Basin[J]. Oil & Gas Geology, 2014, 35(2): 190-198. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201402005.htm
[5]	刘新, 张玉纬, 张威, 等. 全球致密油的概念、特征、分布及潜力预测[J]. 大庆石油地质与开发, 2013, 32(4): 168-174. https://www.cnki.com.cn/Article/CJFDTOTAL-DQSK201304037.htm LIU Xin, ZHANG Yuwei, ZHANG Wei, et al. Concept, characteristics, distribution and potential prediction of the tight oil in the world[J]. Petroleum Geology & Oilfield Development in Daqing, 2013, 32(4): 168-174. https://www.cnki.com.cn/Article/CJFDTOTAL-DQSK201304037.htm
[6]	朱如凯, 邹才能, 吴松涛, 等. 中国陆相致密油形成机理与富集规律[J]. 石油与天然气地质, 2019, 40(6): 1168-1184. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201906002.htm ZHU Rukai, ZOU Caineng, WU Songtao, et al. Mechanism for generation and accumulation of continental tight oil in China[J]. Oil & Gas Geology, 2019, 40(6): 1168-1184. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201906002.htm
[7]	魏海峰, 凡哲元, 袁向春. 致密油藏开发技术研究进展[J]. 油气地质与采收率, 2013, 20(2): 62-66. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201302018.htm WEI Haifeng, FAN Zheyuan, YUAN Xiangchun. Review on new advances in foreign tight oil development technology and their enlightenment[J]. Petroleum Geology and Recovery Efficiency, 2013, 20(2): 62-66. https://www.cnki.com.cn/Article/CJFDTOTAL-YQCS201302018.htm
[8]	张威, 刘新, 张玉玮. 世界致密油及其勘探开发现状[J]. 石油科技论坛, 2013, 32(1): 41-44. https://www.cnki.com.cn/Article/CJFDTOTAL-SYKT201301012.htm ZHANG Wei, LIU Xin, ZHANG Yuwei. Worldwide tight oil and its current exploration & development conditions[J]. Oil Forum, 2013, 32(1): 41-44. https://www.cnki.com.cn/Article/CJFDTOTAL-SYKT201301012.htm
[9]	邱振, 李建忠, 吴晓智, 等. 国内外致密油勘探现状、主要地质特征及差异[J]. 岩性油气藏, 2015, 27(4): 119-126. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201504024.htm QIU Zhen, LI Jianzhong, WU Xiaozhi, et al. Exploration status, main geologic characteristics and their differences of tight oil between America and China[J]. Lithologic Reservoirs, 2015, 27(4): 119-126. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201504024.htm
[10]	杜金虎, 刘合, 马德胜, 等. 试论中国陆相致密油有效开发技术[J]. 石油勘探与开发, 2014, 41(2): 198-205. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201402010.htm DU Jinhu, LIU He, MA Desheng, et al. Discussion on effective development techniques for continental tight oil in China[J]. Petroleum Exploration and Development, 2014, 41(2): 198-205. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201402010.htm
[11]	张映红, 路保平, 陈作, 等. 中国陆相致密油开采技术发展策略思考[J]. 石油钻探技术, 2015, 43(1): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-SYZT201501001.htm ZHANG Yinghong, LU Baoping, CHEN Zuo, et al. Technical strategy thinking for developing continental tight oil in China[J]. Petroleum Drilling Techniques, 2015, 43(1): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-SYZT201501001.htm
[12]	张新顺, 王红军, 马锋, 等. 基于多元回归分析的致密油可采资源评价方法[J]. 石油与天然气地质, 2018, 39(6): 1323-1335. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201806022.htm ZHANG Xinshun, WANG Hongjun, MA Feng, et al. Method to assess recoverable tight oil based on multiple regression analysis[J]. Oil & Gas Geology, 2018, 39(6): 1323-1335. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201806022.htm
[13]	吴林洪, 郭小哲, 罗威, 等. 致密油压裂水平井产能影响因素研究: 以辽河油田大民屯致密油水平井为例[J]. 非常规油气, 2018, 5(3): 56-62. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201803010.htm WU Linhong, GUO Xiaozhe, LUO Wei, et al. Influence factors controlling the productivity of horizontal well by volume frac-turing in tight oil reservoirs: a case study of dense oil horizontal well in Damintun, Liaohe oilfield[J]. Unconventional Oil & Gas, 2018, 5(3): 56-62. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201803010.htm
[14]	孟展, 杨胜来, 王璐, 等. 合水长6致密油体积压裂水平井产能影响因素分析[J]. 非常规油气, 2016, 3(5): 127-133. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201605022.htm MENG Zhan, YANG Shenglai, WANG Lu, et al. Analysis of influence factors on horizontal well productivity by volume fracturing in Heshui Chang 6 tight oil reservoir[J]. Unconventional Oil & Gas, 2016, 3(5): 127-133. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201605022.htm
[15]	王瑞. 致密油藏水平井体积压裂效果影响因素分析[J]. 特种油气藏, 2015, 22(2): 126-128. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201502032.htm WANG Rui. Analysis on influential factors for volumetric frac- turing effects in horizontal well in tight reservoir[J]. Special Oil & Gas Reservoirs, 2015, 22(2): 126-128. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201502032.htm
[16]	王勇茗, 余世福, 周文军, 等. 长庆致密油三维水平井钻井技术研究与应用[J]. 西南石油大学学报(自然科学版), 2015, 37(6): 79-84. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201506010.htm WANG Yongming, YU Shifu, ZHOU Wenjun, et al. Research and application of the 3D horizontal well drilling technology in Changqing tight oilfield[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2015, 37(6): 79-84. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY201506010.htm
[17]	张君峰, 毕海滨, 许浩, 等. 致密储层油气产量与储量预测方法的适用性[J]. 大庆石油地质与开发, 2016, 35(3): 151-158. https://www.cnki.com.cn/Article/CJFDTOTAL-DQSK201603028.htm ZHANG Junfeng, BI Haibin, XU Hao, et al. Applicability of the predicting method for the oil and gas production and their reserves in the tight reservoirs[J]. Petroleum Geology & Oilfield Development in Daqing, 2016, 35(3): 151-158. https://www.cnki.com.cn/Article/CJFDTOTAL-DQSK201603028.htm
[18]	李陈, 夏朝辉, 汪萍, 等. 致密气藏储量评价新方法[J]. 特种油气藏, 2015, 22(5): 107-109. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201505023.htm LI Chen, XIA Zhaohui, WANG Ping, et al. New method for estimating the reserves of tight gas reservoir[J]. Special Oil & Gas Reservoirs, 2015, 22(5): 107-109. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ201505023.htm
[19]	陈元千, 张霞林. 中国新版《天然气可采储量计算方法》标准存在的主要问题及建议[J]. 断块油气田, 2014, 21(6): 735-741. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201406013.htm CHEN Yuanqian, ZHANG Xialin. Existed main problem and recommendation for new edition standard of "The estimated methods of natural gas recoverable reserves" in China[J]. Fault-Block Oil & Gas Field, 2014, 21(6): 735-741. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT201406013.htm
[20]	赖令彬, 潘婷婷, 张虎俊, 等. 压裂致密油藏产能递减分析方法[J]. 科学技术与工程, 2019, 19(18): 183-188. https://www.cnki.com.cn/Article/CJFDTOTAL-KXJS201918027.htm LAI Lingbin, PAN Tingting, ZHANG Hujun, et al. Productivity decline analysis method for fractured tight oil reservoirs[J]. Science Technology and Engineering, 2019, 19(18): 183-188. https://www.cnki.com.cn/Article/CJFDTOTAL-KXJS201918027.htm
[21]	毕海滨, 段晓文, 郑婧, 等. 致密油生产动态特征及可采储量评估方法[J]. 石油学报, 2018, 39(2): 172-179. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201802005.htm BI Haibin, DUAN Xiaowen, ZHENG Jing, et al. Production dynamic characteristics and recoverable reserve estimation method of tight oil[J]. Acta Petrolei Sinica, 2018, 39(2): 172-179. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201802005.htm
[22]	王永祥, 李建忠. 非常规油气区带未开发储量评估指南[M]. 北京: 石油工业出版社, 2012: 26-42. WANG Yongxiang, Li Jianzhong. Gudelines for the practical evaluation of undeveloped reserves in resource plays[M]. Beijing: Petroleum Industry Press, 2012: 26-42.