七里村油田长6油层组压裂新技术研究

发布时间：2018-02-01 17:56

本文关键词： 七里村油田长6 一层多缝压裂效果评价　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：七里村油田位于鄂尔多斯盆地陕北斜坡的东部,生油层和储油层为三叠系上统延长组,主要开采层位为延长组长6油层组,该储层埋藏浅、物性差、地层压力衰竭严重,为典型浅埋藏、低压、特低孔、超低渗油藏。压裂改造过程中多产生水平缝,实施“一层多缝”压裂取得了良好的开发效果,近年来配套形成裸眼井一层多缝压裂和套管井多裂缝压裂工艺。但仍存在裂缝数目确定盲目、施工工艺参数设计不合理以及现场裂缝监测技术攻关不够等问题。为了进一步改善该油田油藏开发效果,解决生产中所存在的问题,需要对前期压裂效果重新评价,并对研究区储层、裂缝、注水开发进行重新认识。据此本论文在充分总结、分析和吸收国内油田压裂开发现有经验的基础上,认真研究了研究区油藏主要地质特征,进而开展了油藏及裂缝系统精细描述,结合延长组长6油层浅储层压裂水平缝的特点,从裂缝产生的机理上研究入手,开展研究区一层多缝水力压裂方案研究,从而完善一层多缝压裂工艺,制定出油田一层多缝压裂的开发技术政策,最后对研究区开展压裂施工效果评价。在当前应用技术情况下,从施工成功率和降低成本角度提出了自己的认识与具体建议,进而为今后服务油田高效开发,切实提高油田的最终采收率奠定了坚实的理论基础。
[Abstract]:Qilicun Oilfield is located in the eastern part of northern Shaanxi slope in Ordos Basin. The source and reservoir reservoirs are the Yanchang formation of the Triassic Upper Permian. The main production horizon is Yanchang No. 6 oil formation. The reservoir is shallow buried and has poor physical properties. The formation pressure exhaustion is serious, which is typical shallow burial, low pressure, ultra-low porosity and ultra-low permeability reservoir. In the process of fracturing, horizontal fractures are produced, and "one layer and many fractures" fracturing has achieved good development effect. In recent years, open hole multi-fracture fracturing and casing multi-fracture fracturing have been formed, but the number of fractures is still blind. In order to further improve the reservoir development effect of the oilfield and solve the problems existing in production, the design of construction process parameters is unreasonable and the field crack monitoring technology is not enough. It is necessary to re-evaluate the pre-fracturing effect and to re-recognize the reservoir, fracture and waterflooding development in the study area. Accordingly, this paper is based on the full summary, analysis and absorption of domestic oil field pressure fracture discovery experience. The main geological characteristics of reservoir in the study area are studied carefully, and then the fine description of reservoir and fracture system is carried out. Combining with the characteristics of horizontal fracture in shallow reservoir of Yanchang No. 6 reservoir, the mechanism of fracture generation is studied. In order to perfect the fracturing technology of one layer and multiple fractures, the development policy of multi-fracture fracturing in one layer of oil field is established by developing the hydraulic fracturing scheme of one layer and multiple fractures in the research area. Finally, the evaluation of fracturing operation effect is carried out in the research area. In the current application technology, the author puts forward his own understanding and concrete suggestions from the point of view of the success rate of construction and the reduction of cost, thus serving for the efficient development of oil fields in the future. It lays a solid theoretical foundation for improving the final oil recovery.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.1

【相似文献】