中美典型常压页岩气开发对比与启示

doi:10.3969/j.issn.1006-6535.2024.04.001

摘要/Abstract

摘要： 为解决中国常压页岩气单井产能低、工程工艺技术不成熟、效益开发难度大等问题,探索合理开发途径,以美国Fayetteville页岩气田和中国东胜页岩气区块为例,基于2个页岩气田的地质特征,从有利区评价、单井产能、工程成本情况等方面展开评价对比。研究表明:东胜区块页岩气有利区评价与Fayetteville相当,但东胜区块尚处于开发早期,且埋深更大,地质条件更复杂,需结合后期开发特征,借鉴Fayetteville气田的开发经验,进一步精细深化分区分类评价;Fayetteville、东胜页岩气均采用分区滚动开发的模式,逐步提升配套工程工艺技术,但东胜区块压裂用液强度、加砂强度均低于Fayetteville气田,平均单井EUR偏低,需持续攻关;Fayetteville气田和东胜区块均坚持持续攻关降本的目标,单井综合成本不断降低,但东胜区块仍需进一步攻关降本,力争单井综合成本降至3 000×10⁴~3 500×10⁴元以内。中国常压页岩气地质资源量大,是未来增储上产的主阵地,通过进一步明确有利区,攻关配套工程工艺技术,降低综合成本,实现全面效益开发,将对中国页岩气长期上产稳产具有重大战略意义。

关键词: 常压页岩气, 有利区, 产能评价, EUR, 东胜区块, Fayetteville气田

Abstract: To address the issues of low single-well production capacity,immature engineering technology,and difficulty in development profitability of China's normal pressure shale gas,and to explore reasonable development approaches,taking Fayetteville Shale Gas Field in the United States and Dongsheng Shale Gas Block in China as examples,based on the geological characteristics of the two gas fields,the evaluation and comparison are conducted in terms of favorable area evaluation,single well productivity and engineering costs.The study shows that the evaluation of favorable areas for shale gas in Dongsheng Block is comparable to Fayetteville,but Dongsheng Block is still in the early stages of development,with greater burial depth and more complex geological conditions.It is necessary to combine the characteristics of later development,learn from the experience of Fayetteville,and further refine and deepen the zoning classification evaluation.The modes of Fayetteville and Dongsheng Shale Gas Field are partition compound development.The supporting engineering technology is gradually improved.For all that,the intensity of block fracturing fluid and sanding in Dongsheng are lower than those in Fayetteville,resulting in a lower average single well EUR.Continuous studied is needed.Both Fayetteville Gas Field and Dongsheng Block adhere to the goal of continuous cost reduction.The comprehensive cost per well keeps decreasing,but further efforts are required in Dongsheng Block,aiming to lower the comprehensive cost per well to within 3 000×10⁴ to 3 500×10⁴ yuan.The geological resources of normal pressure shale gas in China are abundant,which is the main source for enhancing reserves and production.By further clarifying favorable areas,tackling supporting engineering technologies,reducing overall costs,the comprehensive benefit development will be realized,which is of great strategic significance for the long-term stable production of shale gas in China.

Key words: normal pressure shale gas, favorable area, productivity evaluation, EUR, Dongsheng Block, Fayetteville Gas Field

中图分类号:

TE132.2

王纪伟, 宋丽阳, 康玉柱, 魏海鹏, 陈刚, 李东晖. 中美典型常压页岩气开发对比与启示[J]. 特种油气藏, 2024, 31(4): 1-9.

Wang Jiwei, Song Liyang, Kang Yuzhu, Wei Haipeng, Chen Gang, Li Donghui. Comparison and Implications of Typical Normal Pressure Shale Gas Development between China and the United States[J]. Special Oil & Gas Reservoirs, 2024, 31(4): 1-9.

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