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油田到了注水开发后期、高含水甚至特高含水开发阶段,由于地质和开发两方面的原因,在油水井之间形成了低效循环通道,导致注入水沿低效循环通道长期做无效或低效循环,油井产量下降.为改善注水开发效果达到稳油控水目的,有必要对低效循环井层实施调剖、封堵等措施,而有效识别低效循环井层是问题的关键.优选出了识别低效循环油水井和低效循环层位的判定指标,并建立了用于识别低效循环井层的模糊综合评判数学模型.
Due to the geological and exploitation reasons, the oilfield has formed inefficient circulation channels between oil and water wells in the late stage of waterflooding, high water-cut and even ultra-high water cut, resulting in ineffective or inefficient long-term injection of water along low-efficiency circulation channels Circulation and oil well production decline.To improve the effect of water injection development to achieve the purpose of stabilizing water, it is necessary to carry out profile control and plugging measures on inefficient circulation well, and it is the key to identify inefficient circulation well effectively. Identifying inefficient circulating oil and water wells and inefficient circulation beds, and establishing the fuzzy comprehensive evaluation mathematical model for identifying inefficient circulating well layers.