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薄竹山花岗岩为滇东南区内的重要花岗岩岩体,沿其周围分布有重要的多金属矿床分布,该地区的矿床成因类型多样,显示与花岗岩的关系较密切,本文结合前期的工作实践,结合区内的各种地质特征,作区域成矿理论上的探索。 相似文献
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按照地质方案及会议纪要要求,钻遇储气库层位的老井中,1口做为储气库观察井利用,其余井在储气库层位未射孔且气库层位上、下套管环空固井质量优良不窜槽的前提下,可做为下部油藏开发井利用,否则进行全井段封堵,确保气层高压下注采气安全。根据方案部署和实施要求,对可作为继续开发的利用井,先进行井况监测,在现有技术条件下,能复测固井质量的复测固井质量,同时开展井径、腐蚀等套管监测,判定可利用性,经井筒试压进一步确认,不能满足利用条件的封井,如可利用,则更换气密封套管头。 相似文献
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Extra-short He-Ne lasers based on mode split 总被引:2,自引:0,他引:2
An extra-short He-Ne laser (shorter than 100mm) does not work well because there is likely no longitudinal mode in the lasing bandwidth sometimes and the output power rises and falls deeply from time to time.A method to solve this problem has been presented and investigated.A piece of quartz crystal plate appropriately designed is used as a cavity mirror of a He-Ne laser,which has a longitudinal mode spacing larger than the lasing bandwidth to make the equal-spacing mode split.In other words,the number of longitudinal modes is doubled and the actual mode spacing is reduced to the half of that without mode split.Therefore,there is always at least one mode operating in the lasing bandwidth and the power is stable at any room temperature.Such a laser with 85mm cavity length and 0.24mW output power has been made. 相似文献
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