Digitized quantitative evaluation method of oilfield waterflooding process

Abstract

The invention discloses a digitized quantitative evaluation method of oilfield waterflooding process. The method comprises the following steps of 1, creating a waterflooding process precision management effectiveness evaluation index system structure; 2, creating each level evaluation element fuzzy judgment matrix; 3, according to the fuzzy judgment matrix, creating a fuzzy consistent matrix of evaluation elements; 4, according to the fuzzy consistent matrix, determining each evaluation index weight by using hierarchy rank-ordering; 5, combining oilfield waterflooding development status and waterflooding management check requirements, making a degree of membership table of different index ranges of each evaluation factor; checking the degree of membership according to the value of the eachevaluation factor, and obtaining quantitative results according to the weight. The digitized quantitative evaluation method improves the efficiency and timeliness of analysis evaluation; the digitized quantitative evaluation method takes full advantage of oilfield informatization construction achievements, ensures the timeliness and authenticity of data, has high accuracy, overcomes problems of difficulty in index data acquisition and the like, and provides basis for the quantitative management check of the waterflooding process.

Description

technical field [0001] The invention belongs to the field of oil field digitization and water injection development technology, and relates to a quantitative evaluation method for digital oil field water injection process. Background technique [0002] Water injection is the most effective means to maintain the formation energy of the reservoir and maintain the efficient and economical development of the oil field. In the process of oilfield water flooding development, we always adhere to the concept of "good water injection, sufficient water injection, fine water injection, and effective water injection", and strive to control the water cut increase rate and comprehensive decline rate to improve oilfield water flooding recovery. Strengthening the fine management and quality control of the water injection process is the key to realizing the concept of water injection development and controlling the “two reductions and one improvement” of reservoirs. [0003] The constructio...

AI Technical Summary

Problems solved by technology

However, because there are many human factors in determining the evaluation index of each factor, the importance of the index, and the specific weight of the evaluation factor index, the traditional fuzzy evaluation theory has poor applicability to the multi-level and multi-factor quantitative evaluation of the fine management of the water injection process.

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