高温高压下油井水泥环胶结强度测试新方法

发布时间：2018-05-11 07:29

本文选题：固井质量 + 水泥环　；参考：《天然气工业》2016年11期

【摘要】：固井注水泥完成后,水泥环与套管(Ⅰ界面)、与地层(Ⅱ界面)的胶结强度是影响固井质量的重要因素,但目前的水泥环胶结强度测量方法不能很好地模拟井下条件水泥环的形成以及泥饼的冲洗过程,致使测量出的胶结强度数据不能很好地为现场施工提供参考。为此,在分析现有测量水泥环胶结强度方法的基础上,提出了一种能够模拟井下条件的水泥环胶结强度的测量新方法,并且研制了相应的测量装置。该装置能够模拟高温高压环境下不同钻井液在岩心上形成泥饼、钻井液泥饼的动态冲洗、水泥环的养护形成过程,并测量出水泥环与岩心、水泥环与模拟套管的界面胶结强度等。结论认为,利用该装置能够开展水泥环动态冲洗与高温高压养护实验,还能测量第一界面与第二界面的胶结强度,较之于以前的方法更能贴合现场的实际,更具有实用价值;但要评价地层岩性、冲洗液体系等因素对胶结强度的影响还需要利用该装置做进一步的深入研究。
[Abstract]:After cementing is finished, the cementation strength between cement sheath and casing (I interface) and formation (II interface) is an important factor affecting cementing quality. However, the present cement ring cementing strength measurement method can not well simulate the formation of cement ring and the washing process of mud cake, so the measured cementation strength data can not provide a good reference for field construction. Based on the analysis of existing methods for measuring cement ring cementing strength, a new method is proposed to measure cement ring cementing strength, which can simulate downhole conditions, and a corresponding measuring device is developed. The device can simulate the formation of mud cake on the core of different drilling fluids under high temperature and high pressure, the dynamic washing of mud cake of drilling fluid, the curing process of cement ring, and the measurement of cement ring and core. Cement sheath and simulated casing interface cementing strength, etc. It is concluded that the device can be used to carry out dynamic washing and high temperature and high pressure curing experiments of cement ring, and can also measure the bonding strength of the first and second interface, which is more practical and practical than the previous method. But in order to evaluate the influence of formation lithology, flushing fluid system and other factors on the cementation strength, it is necessary to do further research on this device.
【作者单位】：西南石油大学石油与天然气工程学院;
【基金】：国家“十二五”重大科技专项“低渗油气田完井关键技术”(编号:2011ZX05022-006-005HZ)
【分类号】：TE256

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