注入水水质对储层适应程度评价方法研究

选取与注水水质有关的4类(14个)地质因素和3类(15个)水质因素,依据模糊综合评判原理和现行水质标准(SY／T5329-94),提出并建立了储层及注入水水质综合物性评价指标体系、评价标准,提出了以储层综合物性评价结果建立注入水水质标准的基本思想,并通过模糊综合评判结果建立了确定注入水水质对储层适应程度的“模糊综合评判法”。该方法能够较准确地确定注入水水质对储层的适应程度,可用于不同类型油藏的注入水水质对储层适应度评价,具有广泛的适应性。

Evaluation method for the adaptation degree of injected water quality to reservoirs

The injected water quality is an essential parameter which influences the water displacement efficiency, the production performance and the reservoir formation physical property. According to the comprehensive fuzzy diagnosis theory and the water quality standard criteria (SY/T5329-94) , this paper chooses 4 groups ( 14 geologic factors ) which are relevant to injected water quality and 3 groups (15 water quality factors ) which are relevant to water quality itself, and presents and/or establishes the evaluating indicator system and indicator evaluation criteria for both reservoir physical property and injected water quality. Based on the reservoir synthetic physical property results, this paper also puts forward a new basic idea to determine the injected water quality criteria, and establishes a method to determine the adaptation degree for the injected water to the reservoir formation. The application results show that the "comprehensive fuzzy diagnosis method" can accurately figure out the adaptation degree between reservoir and injection water quality, and it' s a simple , applicable and scientific method that can be used for evaluating the adaptation degree between the reservoir formation and the injection water quality for different types of reservoir.