基于多因素耦合的井筒完整性风险评价

发布时间：2018-03-11 04:15

本文选题：耦合协同作用　切入点：井筒完整性　出处：《中国安全生产科学技术》2017年07期 　论文类型：期刊论文

【摘要】：为了合理开展井筒完整性评价,提出合理的管理措施,综合考虑管柱力学、管柱腐蚀、管柱及附件密封、水泥环力学、地层以及油气井管理等关键节点及因素的相互耦合协同作用,分析多因素耦合协同作用对井筒完整性的影响。对于管柱力学等具有比较明确物理意义且可以量化的因素,采用定量分析评价;对于操作管理等难以量化的因素采用定性评价,对于腐蚀环境因素采用定量与定性相结合的方法进行评价;在定性及定量评价的基础之上,对关键节点进行风险概率和风险影响程度的划分及量化,再基于层次分析及风险矩阵的方法建立井筒完整性评价模型;基于模型编制了相应的计算程序,并对某高腐蚀性气井开展了井筒完整性评价。评价结果表明,在影响该井井筒完整性的风险因素中,高酸性气体腐蚀是造成该井井筒完整性失效的主要因素。
[Abstract]:In order to evaluate wellbore integrality reasonably, reasonable management measures are put forward, including string mechanics, pipe string corrosion, pipe string and accessories sealing, cement ring mechanics, etc. The key nodes and factors such as formation and oil and gas well management are coupled and coordinated, and the influence of multi-factor coupling synergy on wellbore integrity is analyzed. Quantitative evaluation is adopted, qualitative evaluation is used for difficult factors such as operation management, and quantitative and qualitative evaluation is used for corrosion environment factors. On the basis of qualitative and quantitative evaluation, The risk probability and risk influence degree of key nodes are divided and quantified, then the wellbore integrity evaluation model is established based on AHP and risk matrix, and the corresponding calculation program is compiled based on the model. The wellbore integrity evaluation of a high corrosive gas well shows that, among the risk factors affecting the wellbore integrity, the high acid gas corrosion is the main factor that causes the wellbore integrity failure.
【作者单位】：中国石化石油工程技术研究院;
【基金】：中国石油化工股份有限公司科技项目(P16052)
【分类号】：TE358;TE983

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