The impervious wall of this project is located in water bearing sand and gravel, the collapse hole takes place due to some factor affect, the deep well lower water level measures are adopted.

本工程防渗墙在富含水砂卵砾石地层施工中，由于各种因素引起严重塌孔，施工中采用了深井井上降水措施。

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Oil bearing evaluation of low salinity water shaly sand reservoirs in the Liudong area is a difficult problem in log interpretation.

柳东地区低矿化度地层水储层的含油性评价是测井解释的一大难题。

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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 pumps many thousands of gallons of mainly water and sand, with a few chemicals, at high pressure into tight gas-bearing shale deposits (hardened muds), creating cracks that allow gas to flow back up the well to the surface ( Shale Shock).

FORBES: The Fracking Solution Is A Good Cement Job

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