川东地区气田水回注系统风险评价方法

发布时间：2019-03-22 20:41

【摘要】：气田水回注系统包括地面处理站、输水管线、回注井筒、回注地层4大子系统,各子系统的任一环节出现问题,整个注水系统都可能瘫痪甚至发生较大的环境污染,但目前气田水回注系统尚缺乏可靠、完善的风险评价方法。在对4个子系统的失效因素统计分析基础上,利用各失效因素的统计频率确定了各级各项指标的权重,并借鉴肯特风险评价模型,从失效因素和失效后果两个方面建立了适用于气田水回注系统以及各子系统的风险评价方法与指标体系,提供了相应的安全等级划分标准。该评价方法既包含对系统可靠性的直接评价,也包括对泄漏后果的评价;既可用于各子系统的评价,也可将对各子系统的评价加权后用于整个回注系统。对川东气田实际回注系统的评价表明,评价结果与现场宏观认识一致,验证了评价方法的可行性。
[Abstract]:The gas field water reinjection system includes four subsystems: surface treatment station, water transmission pipeline, reinjection wellbore, reinjection formation, and any part of each subsystem has problems. The whole water injection system may be paralyzed or even has greater environmental pollution. However, at present, there is a lack of reliable and perfect risk assessment method for gas field water reinjection system. Based on the statistical analysis of the failure factors of the four subsystems, the weights of each index are determined by using the statistical frequency of each failure factor, and the Kent risk assessment model is used for reference. The risk assessment method and index system suitable for gas field water reinjection system and each subsystem are established from two aspects of failure factor and failure consequence, and the corresponding safety grade classification standard is provided. The evaluation method includes not only the direct evaluation of the system reliability but also the evaluation of the leakage consequence, which can be used in the evaluation of the subsystems as well as the weighted evaluation of the subsystems in the whole reinjection system. The evaluation of the reinjection system in the eastern Sichuan gas field shows that the evaluation results are consistent with the macro-understanding in the field, and the feasibility of the evaluation method is verified.
【作者单位】：西南石油大学石油与天然气工程学院;中海石油海南天然气有限公司;中国石油西南油气田分公司重庆气矿;
【分类号】：TE934.1

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