不含油的砂岩和灰岩碳酸盐胶结和颗粒次生加大作用明显加强，物性和孔隙结构差，基本上失去了储集性。
The limestones and sandstones without oil were obviously strong in calcite cementation and grain growing. so they had poor storage property and pore-constructures. and even lost storage capacity.
灰水是生活污水中一种不含粪尿、污染程度较低的污水，对其分类收集和处理后回用，可取得很好的环境效益及经济效益。
If it is treated separately and then reused, there will be a lot of benefits to both environment and economy.
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