川西地区固井质量分析及预测方法研究

发布时间：2018-04-12 18:02

本文选题：川西地区 + 水平井固井质量　；参考：《西南石油大学》2015年硕士论文

【摘要】：川西地区地质构造复杂,目的层埋藏深,断层多,地层破碎,导致固井施工难度大,固井质量难以保证。又因为影响固井质量的因素众多且相互关联,因此,为了获得优质的固井质量,需要对这些影响因素进行全面、系统地分析,并建立合理的预测方法,为固井施工方案的制定提供理论依据。本文对地质、钻井、固井和测井资料进行了统计整理,在大量统计数据支撑下,建立了主要影响因素与固井质量的关系,并分析了这些影响因素的作用规律,得到了适用于川西SF地区的水平井斜井段固井质量单一因素评价集。同时,应用灰色理论中的灰色关联度分析法计算得到了各影响因素的关联度,从而确定了各因素对固井质量影响的贡献值,以此区分出各个因素对固井质量影响的主次关系,并获得了影响川西SF地区水平井固井因素的控制指标。然后,结合理论研究以及统计资料,确定了适合川西地区水平井固井质量影响因素的评价关系。接着,利用灰色关联度确定了各影响因素对固井质量的影响权重,并通过反复计算验证的方法,建立了适合川西地区水平井固井质量预测评价的隶属度集。最后,通过模糊数学中的模糊综合评价方法,采用“加权平均型”综合评价模型对川西地区水平井固井质量进行评价预测。通过统计分析得到的川西SF地区水平井斜井段固井单因素评价集对现场工程师施工具有很强的实用价值；由灰色关联度分析法获得的影响川西地区水平井固井质量各因素的主次关系对改善川西地区水平井固井质量具有重要意义；模糊综合评价法的预测结果与真实固井质量符合度较高,说明此方法用于川西地区水平井固井质量预测效果比较理想。
[Abstract]:The geological structure in western Sichuan is complicated, the target layer is buried deep, the fault is many and the formation is broken, which leads to the difficulty of cementing operation and the difficulty of cementing quality.Because the factors affecting cementing quality are numerous and interrelated, in order to obtain high quality cementing quality, it is necessary to make a comprehensive and systematic analysis of these factors and to establish reasonable prediction methods.It provides a theoretical basis for the formulation of cementing construction scheme.In this paper, the data of geology, drilling, cementing and logging are statistically arranged, and the relationship between the main influencing factors and cementing quality is established under the support of a large number of statistical data, and the action rules of these influencing factors are analyzed.A single factor evaluation set of cementing quality of inclined section of horizontal well in SF area of western Sichuan is obtained.At the same time, the correlation degree of each influencing factor is calculated by using the grey correlation degree analysis method in grey theory, and the contribution value of each factor to cementing quality is determined, and the primary and secondary relationship of each factor to cementing quality is distinguished.The control index of cementing factor of horizontal well in SF area of West Sichuan is obtained.Then, based on the theoretical research and statistical data, the evaluation relationship of the factors affecting the cementing quality of horizontal wells in western Sichuan is determined.Then, the weight of influence factors on cementing quality is determined by using grey correlation degree, and the membership set suitable for predicting and evaluating cementing quality of horizontal wells in western Sichuan is established by the method of repeated calculation and verification.Finally, through the fuzzy comprehensive evaluation method in fuzzy mathematics, the "weighted average" comprehensive evaluation model is used to evaluate and predict the cementing quality of horizontal wells in western Sichuan.The single factor evaluation set of horizontal well slope section in SF area of western Sichuan is of great practical value for field engineer construction.The primary and secondary relationships of the factors affecting the cementing quality of horizontal wells in western Sichuan are of great significance to improve the cementing quality of horizontal wells in western Sichuan.The prediction results of fuzzy comprehensive evaluation method are in good agreement with the true cementing quality, which indicates that the method is more effective in predicting the cementing quality of horizontal wells in western Sichuan.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE256

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