烘干压球机压出的煤球直径为40 mm - 50 mm的扁圆球形、堆集孔隙率大，透风性好。
Drying pressure ball machine pressed briquette diameter 40mm-50mm, heap oblate spherical high porosity, good ventilation.
对于应力敏感性强的储集层，过低的井底压力降低了近井地带地层的孔隙流体压力，导致裂缝趋于闭合。同时，井壁失稳的可能性也大。
To strong stress sensitivity formation, low BHP reduces pore fluid pressure of near wellbore are which results in the closure of formation fracture.
土壤大孔隙和土壤饱和导水率深度增加呈减小的趋势，并且变异性和复杂性很大。
The macropore and saturated hydraulic conductivity have increase with the increase of altitude and have great variability and complexity.
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