Putaohua oil bearing reservoir primarily is middle prosperous and low permeable with sand bodies of bad conjunction and high heterogeneity.

研究区葡萄花油层段储层主要为中孔低渗储层，砂体连通性差，非均质性强。

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The inference can be proved by the artificial oil mixing test and oil-bearing sand serial extraction.

通过原油混合试验和油砂连续抽提试验证实了混源油的推测。

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The drilling of lower channel sand bodies along the ridge of the nose-shaped uplift is successful, making Ge 7 to Hongtai 2 a continuous oil/gas-bearing area.

沿鼻隆脊部钻探低部位河道砂体获得成功，实现了疙7-红台2号含油气区的复合连片。

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Specially formulated lubricants are used in fracking, which involves pumping water, fine sand and fracking fluids underground to split open oil- and gas-bearing rocks.

NPR: Judge Sides With Wyoming In Fracking Chemical Suit

Hydraulic fracturing, or fracking, pumps millions of gallons of water mixed with fine sand and chemicals deep into oil and gas wells to crack gas-bearing rock.

WSJ: NY groups claim industry bias in fracking study