Abstract
AbstractWith the development of polymer microspheres, the evaluation method of water drive reservoir can not meet the needs of field and scientific research. Therefore, it is necessary to establish a set of evaluation methods for the effect of polymer microspheres. Seven evaluation parameters are selected in combination with oilfield development level classification, well pattern adaptability evaluation and ultra-low permeability reservoir development practice. The influence degree of influencing factors of polymer microspheres effect is calculated by principal component analysis method, the weight of each parameter is determined, and the quantitative of polymer microspheres is established Evaluation method. The results show that: 1. The quantitative evaluation results of microsphere effect are consistent with the field cognition; 2. The microsphere test in fractured reservoir can achieve good results, and the cumulative oil increase of Z211 reservoir is 0.88 × 104 t. The quantitative evaluation method of microsphere effect has standardization, quantification and strong operability, which has a good application prospect in ultra-low permeability reservoir. KeywordsPolymer microspheresPrincipal component analysisComprehensive water absorption strengthEffect evaluation
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