新疆油田致密砂砾岩油藏效益开发的发展与深化——地质工程一体化在玛湖地区的实践与思考

doi:10.3969/j.issn.1672-7703.2018.02.003

摘要/Abstract

摘要： 新疆准噶尔盆地是中国陆地的重要油气富集地，蕴含的致密油气潜力巨大，但开发中面临着地质条件复杂、工程难度大、成本高等挑战。为提高开发效益，运用地质工程一体化的思想对玛湖地区的致密油藏开发进行了集中攻关。通过建立精细地质模型和岩石力学模型、优化钻井工具与钻井液体系、采用随钻实时调节的地质导向钻井、基于压裂模拟与实验结果优化改造策略等一系列举措，将区块地质认识和工程实践紧密结合，攻克了钻完井过程中的一系列挑战。研究表明：采用水平井+体积压裂的思路，可以使得玛湖地区的复杂致密油气得到效益开发；水平井钻遇率极大影响了油气井产能；精细三维地质模型指导下的地质导向钻井可有效提高钻遇率和钻井效率；区块适应于细分切割方式的分级体积改造策略，并采用高砂比、高液量、大排量的压裂参数。经过攻关，玛湖地区新开发井的储层品质、钻井品质和完井品质均取得了明显提升，实现了致密油藏效益开发的初步突破，区块已于近期启动了大规模开发建产工作。

关键词: 地质工程一体化, 致密油, 玛湖凹陷, 效益开发

Abstract: The Junggar Basin in Xinjiang is the important onshore oil and gas accumulation site in China and its tight oil and gas potential is enormous, but its development is faced with multiple challenges, such as complicated geological condition, high engineering difficulty and high cost. The concept of geology-engineering integration was applied to focus on researching the development of tight oil reservoirs in Mahu area so as to increase its development benefit. To cope with the challenges in the process of well drilling and completion, the geological cognition and engineering practice were combined closely by taking a series of measures, e.g. establishing fine geological model and rock mechanics model, optimizing drilling tools and drilling fluid systems, conducting geosteering drilling in which adjustment is conducted while drilling, and optimizing the stimulation strategy based on fracturing simulation and experimental results. It is indicated that tight oil and gas in Mahu area can be profitably developed by drilling horizontal wells and conducting stimulated reservoir volume (SRV). The drilling ratio of horizontal wells is vital to the productivity of oil and gas wells. The drilling ratio and drilling efficiency can be improved effectively by means of geosteering drilling under the guidance of fine 3D geological model. Multi-stage SRV strategy in the pattern of division and cutting is suitable for Mahu area and the fracturing parameters of high sand concentration, large fluid volume and high flow rate are adopted. Based on researches, the reservoir quality, drilling quality and completion quality of newly developed wells in Mahu area are improved significantly, the profitable development of tight oil reservoirs are preliminarily broken through, and large-scale development and productivity construction of this block has been launched recently.

Key words: geology-engineering integration, tight oil reservoir, Mahu sag, profitable development

中图分类号:

杜洪凌, 许江文, 李峋, 陆军, 章敬, 彭永灿, 陈进, 王磊. 新疆油田致密砂砾岩油藏效益开发的发展与深化——地质工程一体化在玛湖地区的实践与思考[J]. 中国石油勘探, 2018, 23(2): 15-26.

Du Hongling, Xu Jiangwen, Li Xun, Lu Jun, Zhang Jing, Peng Yongcan, Chen Jin, Wang Lei. Development and deepening of profitable development of tight glutenite oil reservoirs in Xinjiang oilfield:application of geology-engineering integration in Mahu area and its enlightenment[J]. China Petroleum Exploration, 2018, 23(2): 15-26.

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