老井重复压裂技术在吉林油田的应用研究

发布时间：2018-03-31 21:17

本文选题：特低渗透　切入点：重复压裂　出处：《东北石油大学》2015年硕士论文

【摘要】：在我国新增的原油储量中,近年来,低渗透和特低渗透储量所占比例已经超过62%,吉林油田总体上属于低孔、低渗油田,几乎90%以上的油井都要依靠压裂投产,压裂做为储层改造技术,在各采油厂开发历程中一直起着举足轻重的作用,先后形成了系列成熟的工艺技术。随着各油藏开发阶段的变化,新区块陆续投入开发,原有的压裂技术增产效果逐年变差,吨油费用明显上升,已经不能满足现阶段发展的需要。因此,必须优化提高老井重复压裂技术,寻求和探索低成本、高效益的压裂增产技术措施,提高我油田的老井压裂效果,使油公司获得较好的经济效益,同时增强我公司的技术实力,满足不断发展的市场竞争需要,为进一步扩大对外压裂服务市场奠定基础。重复压裂技术的应用前景被许多石油专家所看好,国外多年前就已经开始了重复压裂的室内研究和现场试验,国内的采油技术人员在这方面也做了大量的研究工作,并取得了一些重要成果。本文从重复压裂机理出发,介绍国内国外重复压裂技术新进展,讲述了重复压裂各项技术；在分析压裂井的失效原因基础上,介绍选井选层的一些原则,阐述了老井重复压裂选井选层的基本方法；从地应力场角度出发,研究了裂缝转向机理,阐述了地应力大小、方向,及地应力场对重复压裂效果的影响；介绍了重复压裂的设计方法、施工材料优选方法及经济评价方法。本文通过对压裂方案优化详细论述以及现场施工效果来分析总结,为吉林油田复杂、非均质油藏的压裂提供科学的压裂技术与模式。
[Abstract]:Among the new crude oil reserves in China, in recent years, the proportion of low permeability reserves and ultra-low permeability reserves has exceeded 62 percent. Jilin Oilfield is generally low porosity and low permeability oil fields, almost 90 percent of oil wells have to rely on fracturing to put into production. Fracturing, as a reservoir reconstruction technology, has been playing an important role in the development process of oil production plants, and a series of mature technology has been formed successively. With the change of reservoir development stage, new blocks have been put into development one after another. The original fracturing technology has become worse year by year and the cost of oil per ton has risen obviously, which can not meet the needs of the present stage of development. Therefore, it is necessary to optimize and improve the repeated fracturing technology in old wells and to seek and explore low cost. The high-benefit fracturing technology measures can improve the fracturing effect of the old well in our oilfield, make the oil company obtain better economic benefit, at the same time, strengthen the technical strength of our company, and meet the market competition demand which is constantly developing. Lay a foundation for further expanding the external fracturing service market. The application prospects of the refracturing technology have been favored by many oil experts. Laboratory research and field tests on repeated fracturing have been started in foreign countries for many years. The domestic oil recovery technicians have also done a lot of research work in this field, and have made some important achievements. This paper introduces the new progress of the repeated fracturing technology at home and abroad, and describes the various technologies of repeated fracturing from the perspective of the mechanism of repeated fracturing. On the basis of analyzing the failure reasons of fracturing wells, this paper introduces some principles of selecting wells and layers, expounds the basic method of selecting zones by repeated fracturing in old wells, studies the mechanism of fracture turning from the point of view of in-situ stress field, and expounds the magnitude of in-situ stress. This paper introduces the design method of repeated fracturing, the optimization method of construction material and the method of economic evaluation. The paper analyzes and summarizes the optimization of fracturing scheme and the effect of field operation. It provides scientific fracturing technology and model for complex and heterogeneous reservoir fracturing in Jilin Oilfield.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

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