深层页岩气勘探开发进展与攻关方向

doi:10.13809/j.cnki.cn32-1825/te.2021.01.001

摘要/Abstract

摘要：

通过对近年来深层页岩气突破井的总结,提出了深层页岩气的4个地质特点：①深、浅层页岩基本评价参数相似,但深层页岩含气量和孔隙度一般都要高于中深层;②深层页岩水平应力差远大于中深层;③盆地内深层页岩气普遍表现为超压,压力系数普遍在1.9~2.1,盆地边缘复杂构造区则表现为常压;④正向构造依然是深层页岩气获得高产的主要因素。根据Haynesville和Barnett页岩气田单井生产曲线递减特征分析和四川盆地深层页岩气地质特点,指出了深层页岩气存在的理论认识创新、工程工艺适用性、成本与效益开发3个主要方面问题及其相应的攻关对策。

关键词: 四川盆地, 深层页岩气, 五峰组—龙马溪组我国页岩气可采资源, 水平应力差

Abstract:

Based on the summary of deep shale gas breakthrough wells in recent years, four geological characteristics of deep shale gas are put forward. First, the basic evaluation parameters of deep and shallow shale are similar, but gas content and porosity of deep shale are generally higher than those of medium-deep shale. Second, the horizontal stress difference of deep shale is much greater than that of medium-deep shale. Third, deep shale gas in the basin is generally overpressured, and the pressure coefficient is generally between 1.9 and 2.1, while the complex structure area at the edge of the basin is normally pressured. Fourth, the positive structure is still the main factor for high yield of deep shale gas. Based on the analysis of the decline characteristics of single well production curve in Haynesville and Barnett shale gas fields and the geological characteristics of deep shale gas in Sichuan Basin, three main problems of deep shale gas, namely theoretical understanding innovation, engineering process applicability as well as cost and benefit development. The corresponding countermeasures are also pointed out.

Key words: Sichuan Basin, deep shale gas, Wufeng-Longmaxi Formation, horizontal stress difference

中图分类号:

TE122

郭彤楼. 深层页岩气勘探开发进展与攻关方向[J]. 油气藏评价与开发, 2021, 11(1): 1-6.

Tonglou Guo. Progress and research direction of deep shale gas exploration and development[J]. Reservoir Evaluation and Development, 2021, 11(1): 1-6.

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参考文献 21

[1]	马永生, 蔡勋育, 赵培荣, 等. 中国页岩气勘探开发理论认识与实践[J]. 石油勘探与开发, 2018,45(4):561-574.
	Ma Yongsheng, Cai Xunyu, Zhao Peirong, et al. China’s shale gas exploration and development:understanding and practice[J]. Petroleum Exploration and Development, 2018,45(4):561-574.
[2]	焦方正. 页岩气“体积开发”理论认识、核心技术与实践[J]. 天然气工业, 2019,39(5):1-14.
	Jiao Fangzheng. Theoretical insights, core technologies and practices concerning “volume development” of shale gas in China[J]. Natural Gas Industry, 2019,39(5):1-14.
[3]	何治亮, 聂海宽, 胡东风. 深层页岩气有效开发中的地质问题——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2020,41(4):379-391.
	He Zhiliang, Nie Haikuan, Hu Dongfeng, et al. Geological problems hindering effective development of deep shale gas:Taking Upper Ordovician Wufeng-Lower Silurian Longmaxi Formations in Sichuan Basin and its periphery as an example[J]. Acta Petrolei Sinica, 2020,41(4):379-391.
[4]	龙胜祥, 冯动军, 李凤霞, 等. 四川盆地南部深层海相页岩气勘探开发前景[J]. 天然气地球科学, 2018,29(4):443-451.
	Long Shengxiang, Feng Dongjun, Li Fengxia, et al. Prospect of the deep marine shale gas exploration and development in the Sichuan Basin[J]. Natural Gas Geoscience, 2018,29(4):444-451.
[5]	李阳, 薛兆杰, 程喆, 等. 中国深层油气勘探开发进展与发展方向[J]. 中国石油勘探, 2020,25(1):45-57.
	Li Yang, Xue Zhaojie, Cheng Zhe, et al. Progress and development directions of deep oil and gas exploration and development in China[J]. China Petroleum Exploration, 2020,25(1):45-57.
[6]	聂海宽, 何治亮, 刘光祥, 等. 中国页岩气勘探开发现状与优选方向[J]. 中国矿业大学学报, 2020,49(1):13-35.
	Nie Haikuan, He Zhiliang, Liu Guangxiang, et al. Status and direction of shale gas exploration and development in China[J]. Journal of China University of Mining&Technology, 2020,49(1):13-35.
[7]	邱振, 邹才能, 王红岩, 等. 中国南方五峰组-龙马溪组页岩气差异富集特征与控制因素[J]. 天然气地球科学, 2020,31(2):163-175.
	Qiu Zhen, Zou Caineng, Wang Hongyan, et al. Discussion on characteristics and controlling factors of differential enrichment of Wufeng-Longmaxi formations shale gas in South China[J]. Natural Gas Geoscience, 2020,31(2):163-175.
[8]	谢军, 张浩淼, 佘朝毅, 等. 地质工程一体化在长宁国家级页岩气示范区中的实践[J]. 中国石油勘探, 2017,22(1):21-28.
	Xie Jun, Zhang Haomiao, She Chaoyi, et al. Practice of geology-engineering integration in Changning state shale gas demonstration area[J]. Chinese Petroleum Exploration, 2017,22(1):21-28.
[9]	赵文智, 贾爱林, 位云生, 等. 中国页岩气勘探开发进展及发展展望[J]. 中国石油勘探, 2020,25(1):31-44.
	Zhao Wenzhi, JIA Ailin, Wei Yunsheng, et al. Progress in shale gas exploration in China and prospects for future development[J]. China Petroleum Exploration, 2020,25(1):31-44.
[10]	金之钧, 白振瑞, 高波, 等. 中国迎来页岩油气革命了吗?[J]. 石油与天然气地质, 2019,40(3):451-458.
	Jin Zhijun, Bai Zhenrui, Gao Bo, et al. Has China ushered in the shale oil and gas revolution?[J]. Oil & Gas Geology, 2019,40(3):451-458.
[11]	邱令, 方圆. 西南油气田公司深层页岩气勘探开发成效显著[N/OL]. 企业家日报(2020-9-16)[2020-11-20]. http://www.entrepreneurdaily.cn/2020-09-16/5/2393384.html.
[12]	郭彤楼. 页岩气勘探开发中的几个地质问题[J]. 油气藏评价与开发, 2019,9(5):14-19.
	Guo Tonglou. A few geological issues in shale gas exploration and development[J]. Reservoir Evaluation and Development, 2019,9(5):14-19.
[13]	郭彤楼, 张汉荣. 四川盆地焦石坝页岩气田形成与富集高产模式[J]. 石油勘探与开发, 2014,41(1):28-36.
	Guo Tonglou, Zhang Hanrong. Formation and enrichment mode of Jiaoshiba shale gas field, Sichuan Basin[J]. Petroleum Exploration and Development, 2014,41(1):28-36.
[14]	Hammes U, Hamlin H S, Ewing T E. Geologic analysis of the Upper Jurassic Haynesville Shale in east Texas and west Louisiana: Replay[J]. AAPG Bulletin, 2011,95(10):1643-1666. doi: 10.1306/02141110128
[15]	Baihly J, Malpani R, Altman R, et al. Shale gas production decline trend comparison over time and basins revisited[C]// paper URTEC-2172464-MS presented at the Unconventional Resources Technology Conference, 20-22 July, 2015, San Antonio, Texas, USA.
[16]	曾义金. 深层页岩气开发工程技术进展[J]. 石油科学通报, 2019,4(3), 233-241.
	Zeng Yijin. Progress in engineering technologies for the development of deep shale gas[J]. Petroleum Science Bulletin, 2019,4(3):233-241.
[17]	舒红林, 王利芝, 尹开贵, 等. 地质工程一体化实施过程中的页岩气藏地质建模[J]. 中国石油勘探, 2020,25(2):84-95.
	Shu Honglin, Wang Lizhi, Yin Kaigui, et al. Geological modeling of shale gas reservoir during the implementation process of geology-engineering integration[J]. China Petroleum Exploration, 2020,25(2):84-95.
[18]	樊好福, 臧艳彬, 张金成, 等. 深层页岩气钻井技术难点与对策[J]. 钻采工艺, 2019,42(3):20-23.
	Fan Haofu, Zang Yanbin, Zhang Jincheng, et al. Difficulties and countermeasures of deep shale gas drilling technology[J]. Drilling&Production Technology, 2019,42(3):20-23.
[19]	段华, 李荷婷, 代俊清, 等. 深层页岩气水平井“增净压、促缝网、保充填”压裂改造模式——以四川盆地东南部丁山地区为例[J]. 天然气工业, 2019,39(2):66-70.
	Duan Hua, Li Heting, Dai Junqing, et al. Horizontal well fracturing mode of “increasing net pressure, promoting network fracture and keeping conductivity”for the stimulation of deep shale gas reservoirs:A case study of the Dingshan area in SE Sichuan Basin[J]. Natural Gas Industry, 2019,39(2):66-70.
[20]	沈骋, 郭兴午, 陈马林, 等. 深层页岩气水平井储层压裂改造技术[J]. 天然气工业, 2019,39(10):68-75.
	Shen Cheng, Guo Xingwu, Chen Malin, et al. Horizontal well fracturing stimulation technology for deep shale gas reservoirs[J]. Natural Gas Industry, 2019,39(10):68-75.
[21]	蒋廷学, 卞晓冰, 王海涛, 等. 深层页岩气水平井体积压裂技术[J]. 天然气工业, 2017,37(1):90-96.
	Jiang Tingxue, Bian Xiaobing, Wang Haitao, et al. Volume fracturing of deep shale gas horizontal wells[J]. Natural Gas Industry, 2017,37(1):90-96.

参数	深层页岩气（威荣）	中深层页岩气（焦石坝）
埋深（m）	3 500~3 850	2 150~3 300
TOC>2 %的优质页岩厚度（m）	25~35	38~41
孔隙度（%）	6.06	4.87
含气量（m³/t）	6.17	5.20
游离气比例（%）	76~84	56~64
沉积微相	含钙硅质深水陆棚	硅质深水陆棚
硅质含量（%）	36~42	48~69
钙质含量（%）	15~38	10~13
压力系数	1.9~2.1	1.2~1.5
可压裂指数FI	0.38~0.47	0.62~0.68
破裂压力（MPa）	95~113	55~70
水平应力差异系数	0.25	0.11
微裂缝	不发育	发育