Boreholeproblems and drilling accidents are liable to occur while drilling in western blocks in Tuha Oilfield, which is rich in salt lime beds.
吐哈油田西部各区块富含盐膏、膏质泥岩层,钻井时易发生复杂情况与事故。
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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.
In the borehole electromagnetic wave techniques exist problems on "Imagereconstruction from incomplete projections data", the problems can be treated via "Squashing".