They live in freshwater of streams, lakes and thermal springs, moist soil , and mud .
他们住在淡水的河流，湖泊和热泉水，潮湿的土壤，泥浆。
2
The formation water in L area, M Basin is fresh. The natures of drilling mud vary with different drilling depth. There is a complicated relationship between electric properties of water and oil.
盆地L区地层水为淡水类型，各井随埋深的不同及钻井泥浆性能的不同，油、水电性识别极为困难。
3
Since the purpose is to minimize alteration, a fresh core has often been drilled with a bland mud, either water - or oil-base, but with a minimum of chemical additives and weighting material.