长关油井再利用潜力预测

在油田高含水开发后期，为了实现对部分具有开发潜力而又闲置的长关油井的再利用，综合考虑经济效益及开发条件两方面因素，建立了长关油井再利用综合潜力预测模型及应用原则。再利用综合潜力预测模型包括：①运用盈亏平衡原理建立的经济潜力预测模型，利用该模型可以计算油井在不同时期的关井经济界限，从而准确判断长关油井是否具有再利用的经济潜力；②运用模糊数学理论建立的再开发潜力评价模型，利用该模型可计算出长关油井的再开发潜力指数，实现对长关油井再开发潜力的定量评价。利用建立的综合潜力预测模型及模型应用原则对P油田287口长关油井的再利用潜力进行了综合预测，并优选出10口长关油井于2006年进行了再生产，平均单井日产油2．15t，年投入产出比达到1：5，取得了较好的经济效益。图2表6参15

Reusable potential prediction of long-time shut-in oil wells

Comprehensive reusable potential prediction models and relevant principles are established in order to reuse the potential of long time shut-in oil wells, which have been shut in during the high water-cut stage of an oil field, considering economic efficiency and development conditions. The comprehensive reusable potential prediction models include the following: the prediction model of economic potential, based on the economics profit and loss balance principle, can determine the closing economic limitations of different stages of oil wells and predict whether a long time closed oil well has reusable economic potential or not; the prediction model of redevelopment potential based on Fuzzy Mathematics theory provides quantitative evaluation by calculating the redeveloping potential index. Comprehensive reusable potential predictions of 287 long time shut-in wells of P oil field have been done with the model and principles, and 10 wells were selected to put into reproduction in 2006 and achieved good results with an average daily production of 2.15 t per well and the ratio of annual input to output was 1 to 5.