注水开发油田水质优化方法研究

油田注水是保持一定地层压力水平提高原油采收率的有效措施，保证油田正常注水，达到预期的油田注水开发效果就显得非常重要，尤其对中低渗透砂岩油藏更是如此。大量研究表明，其主要的影响因素是注入水水质方案和操作与管理水平。在综合考虑油田注水水质的配伍性、水质处理工艺、注水井吸水能力、注入水增注措施、油田配注要求以及注入水综合成本等因素的基础上，以经济评价为手段，以降低注水成本提高注水开发效益为目标，提出了全新的注水水质优化概念。这一水质优化技术思路和方法具有广泛的指导意义和应用前景。

Study on Method of Water Quality Optimization in Water Injection to Develop Oil Field

Water injection is an effective measure to maintain the reservoir energy and to enhance the oil recovery. It is very important, to the expected development effectiveness of Water injection reservoirs, especially to those with medium low permeability sandstone reservoirs to ensure water injection normally. The study results show that the injected water quality regulation, operation and management are the main factors to affect the development effectiveness. Aimed at the development effectiveness and lowering water injection cost, a noval concept of water quality optimization is proposed in this paper, which takes comprehensive considerations of water quality compatibility, water treatment, water injectivity, stimulation, planned volume of injected water and integration cost of water injection. This technique has a wide guideable significance and its application will result in good economic benefit and perspective future.