作者通过露头调查、钻孔岩心分析和砂分散体系制图，对鄂尔多斯盆地东北部直罗组下段进行了成因分析。
According to outcrop research, drilling core analysis, and sand distributed system drawing, we analyzed the lower member of Zhiluo Formation, northeastern Ordos basin.
通过对钻孔岩心和浅地层地震剖面的分析，恢复了辽东湾北部晚更新世中期以来的沉积环境。
The deposit environment in the north of Liaodong Bay since the medium-term of late Pleistocene is rebuilt by the analyses of the core and the seismic profile.
采用组合钻具进行跟管钻进，通过随钻跟入的套管保护孔壁，解决因钻孔垮塌导致钻探效率和岩心采取率低等技术难题。
The problems of low drilling efficiency and low core recovery due to borehole collapse were solved with pulling in casing while drilling through using combined BHA with casing.
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