期刊
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
卷 156, 期 -, 页码 662-672出版社
ELSEVIER
DOI: 10.1016/j.petrol.2017.06.047
关键词
Oil well cement; Shrinkage; Tensile properties; Young's modulus; Nanomaterials
资金
- Research Council of Norway (RCN) via PETROMAKS2 [228599]
Well cementing is an important operation during drilling and completion of oil wells. The cement sheath must maintain well integrity behind the casing and provide long-term zonal isolation to ensure safety and prevent environmental problems. Despite recent technological advancement in smart polymeric materials, fibers and self healing materials, it is still a big challenge to provide adequate long-term zonal isolation in severe oil well conditions. This review provides an overview of challenges faced in oil wells compromising the long-term ability of the cement sheath to provide zonal isolation. Factors controlling the long-term performance of cement sheath are discussed, in terms of shrinkage, tensile strength and flexibility. The use of nanomaterials as cement additive to fabricate flexible, high-tensile strength, and low-shrinkage cement system are reviewed. Introduction of nanomaterials into the cement system is a promising approach to design a sealant for the entire life of the well, thereby avoiding potential remedial costs and environmental impacts.
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