致密储层测井评价技术及发展方向

致密油气田在中国油气田开发中占有非常重要的地位,致密油所储藏的油气储量占据了中国探明储量的70%以上。致密油藏油气田分布广泛,勘探难度极大,致密储层测井评价技术是储量评价、井位部署等勘探工作中的核心技术,未来发展趋势是大数据方法与神经网络方法相结合,综合评价致密储层流体类型和孔隙结构等测井评价相关参数。目前大多数致密储层测井方法和工具都是基于中子、声波、密度等常规方法和手段,缺乏成像测井、核磁测井、随钻测井等新技术的创新应用,至今还没有系统有效致密储层测井评价技术。为此,在调研国内外大量文献的基础上,系统总结了致密油储层的地质特征,并阐述了中子、声波、密度等常规测井评价技术与成像测井、核磁测井、随钻测井等新技术、新方法在致密油储层评价上应用的不同之处,形成了一套比较系统性和规范化的致密储层测井评价方法。致密油藏应该大力发展岩石学模型研究和核磁共振技术研究,可以有效提高测井评价技术水平,提高储层预测和流体检测的准确性和可靠性。研究成果对国内外致密油藏测井评价研究具有参考价值。

Logging Evaluation Technology and Further Development of Tight Reservoirs

Tight oil and gas fields play a very important role in the oil and gas fields in China, and the oil and gas stored in tight oil reservoirs account for more than 70% of the proven reserves in China. Oil and gas fields in tight oil reservoirs are distributed widely and continuously, making exploration extremely difficult. Tight reservoir logging evaluation is a core technology in reserves evaluation, well deployment and other exploration work. The future development trend is to integrate big data methods with neural network methods to comprehensively evaluate logging evaluation related parameters such as fluid type and pore structure of tight reservoirs. Most of the existing tight reservoir logging methods and tools are based on conventional methods and means such as neutron, acoustic wave and density. There is a lack of new technologies and innovations such as imaging logging, nuclear magnetic logging and logging while drilling, and there is still no systematic and effective tight reservoir logging evaluation technologies. Therefore, on the basis of extensive literature investigations at home and abroad, this paper systematically summarized the geological characteristics of tight oil reservoir and expounded the differences between conventional logging evaluation techniques (such as neutron, acoustic wave and density) and new technologies and methods (such as imaging logging, nuclear magnetic logging and logging while drilling) in the evaluation of tight oil reservoirs to develop a set of systematic and standardized methods for tight reservoir logging evaluation. Lithological modelling and NMR technology should be deeply developed for tight oil reservoirs so as to effectively improve the logging evaluation technology and enhance the accuracy and reliability of reservoir prediction and fluid detection. The study results have certain reference values to the logging evaluation of tight reservoirs at home and abroad.