油田注入井堵塞垢样室内制备技术——以锦州9-3油田为例

Preparation Technology of Plugging Scale Sample in Oilfield Injection Well—A Case Study of Jinzhou 9-3 Oilfield

我国油田注聚开发过程中,堵塞问题日益严重,而解堵体系的研究需要消耗大量的垢样以支持新型解堵剂的研制及解堵性能测试。油田现场应用主要存在取样成本高、垢样消耗快,进而造成垢样不足、无样可用的问题。本文以JZ9-3油田为例明确低效注入井堵塞物成分,完成人工垢样的制备以降低解堵成本。从垢样成分分析、解堵机理研究、人工垢样制备、人工垢样解堵体系性能评价这四个方面进行研究。结果表明:研究制备的人工垢样与原有样品性质基本一致,可替代原有样品用于实验、制备成本低、配方明确后可批量生产,其应用后可有效降低油田单位的取样成本,减少采样对正常生产的影响,具有较好的社会价值、经济价值。In the process of polymer injection development, the problem of plugging is becoming more and more serious, and the research of plugging removal system needs to consume a lot of scale samples to support the development of new plugging agents and the plugging performance test. The main problems in oilfield field application are high sampling cost, and fast consumption of scale samples, resulting in insufficient scale samples and no usable samples. In this paper, JZ9-3 oilfield is taken as an example to determine the composition of low-efficiency injection well blockage, and complete the preparation of an artificial scale sample to reduce the cost of plugging removal. This paper studies the composition of scale samples, the mechanism of blockage removal, the preparation of artificial scale sample and the performance evaluation of artificial scale sample blockage removal system. The results show that the properties of the artificial scale sample prepared by the study are basically the same as the original sample, which can replace the original sample for experiment, low preparation cost, and mass production after the formula is clear. The application of the artificial scale sample can effectively reduce the unit sampling cost of the oilfield and reduce the influence of sampling on normal production, and has good social and economic value.