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为了更好的实现致密油的勘探开发,大港油田在沧东凹陷开展了孔二段致密油的长井段连续取芯工作。本文通过分析长井段连续取芯钻井技术难点,开展了连续取芯钻井工程设计优化、取芯工具优选、取芯技术措施等研究。该研究应用到官108-8取芯井后,共取芯26筒,取芯进尺500m,取芯长495.71m,岩心收获率99.14%,以取芯进尺500m的长度打破致密岩取芯世界纪录。
In order to better realize the exploration and development of tight oil, Dagang Oilfield carried out the continuous coring work in the Changjing section of the second member of the second member of the Cangdong Depression. In this paper, by analyzing the technical difficulties of continuous coring drilling in Changjing section, the research of continuous coring drilling engineering design optimization, coring tool optimization and coring technical measures are carried out. The study applied to the 108-8 coring wells, a total of 26 core access core, coring footage into 500m, coring length 495.71m, core harvest rate of 99.14% to coring footage 500m length to break the tight rock coring world record .