定向水力射孔压裂技术机理研究以及数值分析

发布时间：2018-07-12 11:47

本文选题：水力射孔 + 低渗透　；参考：《新疆大学》2015年硕士论文

【摘要】：目前我国的低渗透油气田占有的比例越来越大。对国内油气田的开发己经进入了一个中、高含水期的阶段,使储油、气层单一方向甚至是多个方向的渗透率越来越低,从而在采油过程中会产生过多的资源浪费,而且使地层的应力分布更加不均匀,导致油、气田高产稳产的困难越来越大。重复水力压裂作为老油气田控水稳油、综合治理的重要措施。当前国内重复压裂所面临的问题严峻,急需新技术进步来扭转我国重复压裂成功率低,重复压裂后油气层渗透率低岩层损伤大增产量低、有效期短、科研落后于现场施工等被动局面。定向水力射孔压裂技术是集定向水力射孔、压裂于一体的新型增产体积改造技术,可适用于低渗透油(气)等复杂储层的体积增产改造。定向水力射孔压裂技术可以有效对老油气田进行重复压裂,可以有效破碎不同方向新的储油层并压裂形成新的裂缝或者裂缝网,提高老油气层的渗透率,降低岩层的损伤,有利于提高油气田的产量和最终开采率。本文通过对比传统的重复水力压裂技术的基础上,分析了定向水力射孔压裂技术的优越性。通过分别对定向水力射孔冲蚀破储层碎岩石机理、水力射孔孔道顶端裂缝的起裂和水力压裂裂缝的转向延伸机理进行了研究分析。从理论上分析了定向水力射孔压裂技术的可行性和优越性。并通过采用数值模拟分析方法,来验证了定向水力射孔压裂技术的可行性以及优势。通过理论和数值分析这两种方法来说明:定向水力射孔压裂技术能够有效地提高储层的渗透能力,提高油气田的增产能力。
[Abstract]:At present, the proportion of low permeability oil and gas fields in China is increasing. The development of domestic oil and gas fields has entered a stage of high water cut period, which makes the permeability of oil storage and gas reservoir single direction or even multiple direction lower and lower, thus resulting in excessive waste of resources in the process of oil production. Moreover, the stress distribution of the formation becomes more and more uneven, resulting in increasing difficulties of high and stable production of oil and gas fields. Repeated hydraulic fracturing is an important measure to control water and stabilize oil in old oil and gas field. At present, the domestic repeated fracturing is faced with severe problems, so it is urgent to improve the new technology to reverse the low success rate of repeated fracturing in China and the low permeability of oil and gas reservoir after repeated fracturing. Big rock damage? Low yield increase, short validity period, scientific research lagging behind the site construction and other passive situation. Directional hydraulic perforation fracturing technology is a new type of stimulation and volume reconstruction technology which integrates directional hydraulic perforation and fracturing. It can be applied to the volume increasing reconstruction of complex reservoirs such as low permeability oil (gas) and so on. Directional hydraulic perforation fracturing technique can effectively fracture old oil and gas fields, break new reservoir in different directions and form new fracture or fracture network, improve permeability of old reservoir and reduce damage of rock formation. It is propitious to increase the output and final production rate of oil and gas field. In this paper, the superiority of directional hydraulic perforation fracturing technology is analyzed by comparing the traditional hydraulic fracturing technology. The rock breaking mechanism of directional hydraulic perforation reservoir, the initiation of fracture at the top of hydraulic perforation channel and the mechanism of diversion extension of hydraulic fracturing fracture are studied and analyzed respectively. The feasibility and superiority of directional hydraulic perforation fracturing technology are analyzed theoretically. The feasibility and advantages of directional hydraulic perforation fracturing are verified by numerical simulation and analysis. Through theoretical and numerical analysis, it is shown that directional hydraulic perforation fracturing technology can effectively improve the permeability of reservoir and increase production of oil and gas fields.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.1

【参考文献】