Mining of copper, cobalt, diamonds, gold, zinc and other metals, as well as petroleum extraction, once accounted for 75 percent of its GDP.
铜、钴、钻石、黄金、锌和其它资源的开采，以及石油开采，曾经占其GDP的75%。
The invention relates to a petroleum extraction technology, aiming at a strong sensitivity oil layer water injection well.
本发明是针对强敏感油层注水井的石油开采技术。
This gas exhausting and light oil recovering device may be used for various big oil tanks in petroleum extraction, transportation and oil depot.
一种储油罐排气轻质油回收装置，它属于石油化工机械，可用于石油开采、运输以及油库等的各种大型储油罐。
A water-base viscosity-reducing agent is used to regular steam alternately inflow-outflow well or heat-water-filling well, which can promote petroleum extraction rate.
本发明涉及到在稠油开采过程中使用耐高温水基降粘剂可以大幅度提高石油采收率。
A water-base viscosity-reducing agent is used to regular steam alternately inflow-outflow well or heat-water-filling well, which can promote petroleum extraction rate.
本发明涉及到在稠油开采过程中使用耐高温水基降粘剂可以大幅度提高石油采收率。
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