吴起油田寨子河区长6油层注水开发效果评价

发布时间：2018-04-10 20:45

本文选题：长6 + 低渗透　；参考：《西安石油大学》2015年硕士论文

【摘要】：吴起油田寨子河区位于鄂尔多斯盆地陕北斜坡(伊陕斜坡)西部中段,主力层长6储层是典型的特低渗砂岩岩性油藏,地质条件普遍以致密、特低渗、低孔、低压、低含油饱和度的长石质细～粉砂岩为主要特征,钻穿油层后基本没有自然产量,只有压裂改造后才具有工业开采价值,单井产量递减快。寨子河区自投入注水开发后,主力长6油层地层能量在一定程度上得以有效补充,但同时表现出随着地层亏空的加大,地层压力保持水平不断下降,产油自然递减速度加大,产油水平难以保持等,影响油田开发效果与开发水平。本论文采用油藏工程研究技术、产吸剖面分析技术及油藏动态分析技术,对长6油层注水开发进行效果评价。通过利用该区油藏静态资料研究成果,明确了油层产量、压力和含水率变化规律,明确了油层吸水能力及注采平衡状况,油水分布及水线推进状况、储量动用及潜力分布状况等,针对低渗透油田开发中存在问题提出了调整注采井网、完善注采对应关系、调整注采压力系统等一系列开发调整方案,并形成了一套低渗透油层注水开发评价的方法体系,为深入掌握长6低渗透油藏注水开发效果提供参考具有积极的指导意义,同时为提高吴起油田开发效果,确保其长期持续稳定发展提供有效的技术思路或技术体系。
[Abstract]:The Zhaizi River area of Wuqi Oilfield is located in the middle section of the western part of the northern Shaanxi slope (Yishan slope) in the Ordos Basin. The main reservoir Chang 6 is a typical reservoir with extremely low permeability sandstone lithology. The geological conditions are generally dense, extremely low permeability, low porosity and low pressure.The feldspathic fine siltstone with low oil saturation is the main feature. There is no natural production after drilling through the reservoir. Only after fracturing and revamping has the industrial exploitation value and the single well production decreases rapidly.Since the Zhaizihe area was put into water injection development, the formation energy of the main Chang 6 reservoir has been effectively replenished to a certain extent, but at the same time it has shown that with the increase of formation deficit, the level of formation pressure keeps decreasing and the natural decline rate of oil production increases.The oil production level is difficult to be maintained, which affects the development effect and development level of oil field.In this paper, reservoir engineering research technology, production and absorption profile analysis technology and reservoir dynamic analysis technology are used to evaluate the effect of water injection in Chang6 reservoir.By using the research results of static reservoir data in this area, the variation law of reservoir production, pressure and water cut, the water absorption capacity and injection-production balance, the distribution of oil and water and the advance of waterline are determined.In view of the problems existing in the development of low permeability oil fields, a series of development adjustment schemes, such as adjusting injection-production pattern, perfecting the corresponding relationship between injection and production and adjusting the injection-production pressure system, are put forward.A set of method system for water injection evaluation of low permeability reservoir is formed, which provides a reference for further mastering the effect of water injection in Chang6 low permeability reservoir, and improves the development effect of Wuqi oilfield at the same time.Ensure its long-term sustainable and stable development to provide an effective technical thinking or technical system.
【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】：TE357.6

【参考文献】