油气井井筒完整性系统风险评估方法

发布时间：2018-07-26 17:41

【摘要】：常规油气井井筒完整性风险性评价方法只是针对单一工况的,目前还没有油气井整个寿命周期内井筒完整性系统风险评价方法。为此,将油气井井筒关键结构(点)(如完井油套管柱、水泥环等)完整性风险评估和考虑多种工况的井筒综合完整性评估相结合,提出了油气井整个寿命周期(包括钻井、完井、生产、弃井等4种工况)的井筒完整性系统风险定量评估方法,建立了油气井井筒完整性系统风险定量评估模型和评价指标。利用该风险评估方法对普光气田气井整个寿命周期内的井筒完整性风险进行了评估,结果发现该气田气井井筒完整性风险较高,与现场情况相符。研究表明,利用提出的油气井井筒完整性系统评估方法可以评估油气井整个寿命周期内的井筒完整性风险,为降低油气井井筒完整性风险提供依据。
[Abstract]:The conventional evaluation method of wellbore integrity risk is only aimed at a single working condition, but there is no systematic risk assessment method for wellbore integrity in the whole life cycle of oil and gas wells. Therefore, by combining the integrity risk assessment of the key structure (such as completion casing string, cement ring, etc.) of oil and gas well bore with the comprehensive integrity assessment of wellbore considering various working conditions, the whole life cycle of oil and gas well (including drilling, etc.) is proposed. The risk quantitative evaluation model and evaluation index of wellbore integrity system for oil and gas wells are established based on the quantitative risk assessment method of wellbore integrity system based on completion, production and abandonment conditions. The wellbore integrity risk during the whole life cycle of gas well in Puguang gas field is evaluated by using this risk assessment method. The results show that the wellbore integrity risk of gas well in this gas field is high, which is consistent with the field situation. The results show that the wellbore integrity risk can be evaluated by using the proposed wellbore integrity evaluation method, which provides a basis for reducing the wellbore integrity risk in oil and gas wells.
【作者单位】：中国石化石油工程技术研究院;
【基金】：中国石化科技攻关项目“油气井完整性评价技术研究”(编号:P15021)资助
【分类号】：TE256

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