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岩心是认识地层及油气储量最真实的依据,又是研究岩性、物性、电性与含油性的第一手资料。取心工艺是钻井工艺过程的重要环节。衡量取心工作的好坏,主要是岩心收获率的高低。要提高岩心收获率,除了正确地设计、装配取心工具外,合理的取心工艺也是很重要的因素。我公司在现场应用中,通过实践、分析、总结,得出一套现场方法,并在4口井上加以应用,最终岩心收获率由局标准95%上升至98.75%,工期缩短了15%。
Core is the most realistic basis for understanding stratigraphy and oil and gas reserves. It is also the first-hand information for studying lithology, physical property, electrical property and oiliness. Coring process is an important part of drilling process. The coring work is good or bad, mainly the core rate of harvest. To improve the rate of core harvesting, in addition to properly designing and assembling coring tools, reasonable coring techniques are also important factors. In the field application, our company got a set of on-site methods through practice, analysis and conclusion, and applied them in four wells. The final core collection rate increased from 95% to 98.75% of the bureau standard, and the construction period shortened by 15%.