低渗低压低丰度油藏注水开发效果评价

发布时间：2018-01-17 22:03

本文关键词：低渗低压低丰度油藏注水开发效果评价　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：目前,我国大多数低渗透油藏采用注水方式进行开发,但对于低渗浅层砂岩油藏注水开发效果评价方法研究较少。为了较为系统的研究该类油藏注水开发效果评价方法,本文以鄂尔多斯盆地渭北油田长3砂岩油藏为研究对象,首先基于油藏地质特征及开发生产特征进行注水开发动态分析,其次应用油藏工程方法对耗水量、综合含水量、注水利用率、注水波及体积、储量动用程度、储量控制程度、油藏吸水能力等指标进行开发效果评价,最后通过井网适应性分析提出注采参数优化方案。研究结果表明,渭北油田长3油藏注水开发效果差,主要原因为(1)外围区和三万吨区油水流度比相差较大,采用同一种井网导致注采井距与物性耦合性差(2)水平井区注采井网不完善,地层压力下降快(3)油水流度比较小的地区注水压力上升快易使层间缝开启形成水淹井(4)层间非均质性强,加之人工裂缝与天然裂缝沟通,注水波及体积系数低。因此,对于同类油藏开发过程中应根据储层物性分区采用不同的注采井网,并以超前注水方式为主,保持地层压力为主要目的。通过对浅层低渗砂岩油藏注水开发效果评价方法的研究,对同类油藏开发具有重要的理论指导意义。
[Abstract]:At present, most low permeability reservoirs in China are developed by water injection. However, there is little research on the evaluation method of waterflooding development effect in low permeability shallow sandstone reservoir, in order to systematically study the evaluation method of waterflooding development effect in this kind of reservoir. This paper takes Chang3 sandstone reservoir of Weibei Oilfield in Ordos Basin as the research object. Firstly, based on reservoir geological characteristics and production characteristics, water injection development performance analysis is carried out, and then reservoir engineering method is applied to water consumption. Comprehensive water content, water injection utilization ratio, water injection swept volume, reserve production degree, reserves control degree, reservoir water absorption ability and other indicators to evaluate the development effect. Finally, the optimization scheme of injection-production parameters is put forward through well pattern adaptability analysis. The results show that the water injection development effect of Chang 3 reservoir in Weibei Oilfield is poor. The main reason is that the oil-water mobility ratio in the peripheral area and 30,000 ton area is quite different, and the adoption of the same well pattern leads to the poor coupling between the well spacing and the physical property. (2) the injection-production well pattern is not perfect in the horizontal well area. The rapid increase of water injection pressure in the area with low oil-water mobility makes the interlayer fracture open to form a water-flooded well No. 4) and the interlayer heterogeneity is strong, coupled with the communication between artificial fracture and natural fracture. Therefore, different injection-production pattern should be adopted according to the physical property of reservoir in the development of similar reservoirs, and the main way is to advance water injection. The main purpose of this paper is to maintain formation pressure. Through the research on the evaluation method of water injection development effect in shallow low permeability sandstone reservoir, it has important theoretical guiding significance for the development of similar reservoirs.
【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】：TE357.6

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