页岩气储层多脉冲压裂复合工艺研究

发布时间：2018-04-26 16:32

本文选题：页岩气 + 多脉冲复合压裂　；参考：《西安石油大学》2017年硕士论文

【摘要】：页岩气是一种新兴能源,既是常规天然气的潜在替代能源,也是清洁环保能源。目前在美国、加拿大等已实现商业化开采和利用。我国页岩气储量丰富,但由于我国页岩气藏地表环境及地质特征的复杂性,使得其开发工艺和技术尚在试验探索阶段。当前,以水力压裂改造为主的页岩气储层改造工艺并不能达到预期理想的开采效果,可见页岩气开发新技术的探索与研究迫在眉睫。为此,本论文开展了页岩气储层多脉冲压裂复合技术模型研究。本论文基于多级强脉冲高能气体压裂技术的作用原理及作用特点分析,结合页岩气储层地质特征的研究,探讨出该技术在页岩气储层是适用的。开展了对页岩气多脉冲压裂药装药量的模型研究,并编制了软件进行计算,分析得出,采用全封闭式压裂井口装置、延时控制点火装置以及多级装药结构,可有效降低压挡液做功损失的能量,从而提高了压裂药的能量利用率,进一步生成多裂缝体系产生更好的压裂效果。以页岩气多脉冲复合压裂机理为理论依据,重点对页岩气水平井多脉冲压裂工艺进行研究,对隔断式延时点火控制装置、固体压裂药选择与设计以及水平井固体药多级装药结构等进行了详细研究,设计出了页岩气储层水平井全封闭式多脉冲压裂工艺模型,并考虑与水力喷射压裂进行复合探讨其工艺过程。最后在实际现场施工中结合一口井对其进行工艺模型设计,利用计算软件对装药量进行计算。该技术为我国页岩气开发提供了一条新途径。通过研究多脉冲复合压裂技术作用机理,建立了页岩气储层多脉冲复合水力压裂技术的裂缝计算模型,将复杂延伸等效处理给出同方位多裂缝延伸模型,为进一步研究水力裂缝在多裂缝中的扩展问题提供了研究方向和思路,建议继续考虑三维多裂缝转向以及滤失等因素的影响进一步深入研究。
[Abstract]:Shale gas is a new energy source, which is not only a potential alternative energy for conventional natural gas, but also a clean and environmentally friendly energy. At present, in the United States and Canada, commercial exploitation and utilization have been realized. China has rich shale gas reserves, but because of the complexity of the surface environment and geological characteristics of the shale gas reservoir in China, its development technology and technology are still being tested. At present, the shale gas reservoir reconstruction technology based on hydraulic fracturing can not achieve the desired results, and it is very urgent to explore and study the new technology of shale gas development. Therefore, this paper has carried out a multi pulse fracturing technology model for shale gas reservoir. This paper is based on multistage strong pulse high energy. The function principle and characteristic analysis of gas fracturing technology and the study of the geological characteristics of shale gas reservoir are used to study the application of this technology in shale gas reservoir. A model study on the loading capacity of shale gas multi pulse fracturing medicine is carried out, and the software is compiled and calculated. It is concluded that the fully closed fracturing wellhead device is delayed. The control of the ignition device and the multistage charging structure can effectively reduce the energy of the power loss of the pressure gear, thus improve the energy utilization of the fracturing medicine and further generate the multi fracture system to produce better fracturing effect. The theory of shale gas multi pulse fracturing is the theoretical basis, and the multi pulse fracturing technology of shale gas horizontal wells is focused on. In this paper, the isolation type delay ignition control device, the selection and design of solid propellant and the structure of multilevel charge in horizontal well are studied in detail. A fully closed multi pulse stamping process model for horizontal wells in shale gas reservoir is designed, and the process process is considered in combination with hydraulic jet fracturing. In the field, the process model is designed in combination with a well. The calculation software is used to calculate the charge quantity. This technology provides a new way for the development of shale gas in China. Through the study of the mechanism of multi pulse fracturing technology, the fracture calculation model of shale gas reservoir with multi pulse combined hydraulic fracturing technology is set up, which will be complicated. The extended equivalent treatment gives the same azimuth multi crack extension model, which provides the research direction and ideas for further research on the expansion of hydraulic cracks in multiple cracks. It is suggested that the influence of three dimensional multi crack steering and filter loss are further considered.

【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE377

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