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原文传递 FLY ASH-CEMENT MIXTURES FOR SOLIDIFICATION AND DETOXIFICATION OF OIL AND GAS WELL SLUDGES.

题名：	FLY ASH-CEMENT MIXTURES FOR SOLIDIFICATION AND DETOXIFICATION OF OIL AND GAS WELL SLUDGES.
作者：	Joshi-RC; Lohtia-RP; Achari-G
关键词：	OIL-WELLS; SLUDGE-; SLUDGE-DISPOSAL; LABORATORY-STUDIES; SOLIDIFICATION-; STABILIZATION-; PORTLAND-CEMENT; FLY-ASH; LIME-; SODIUM-SILICATE; COMPRESSIVE-STRENGTH-TESTS; HYDRAULIC-CONDUCTIVITY; TOXICITY-; TEST-RESULTS
摘要：	Oil and gas well sludges usually consist of drill mud and formation cuttings, as well as various hydrocarbons. They are in a semiliquid state and vary widely in composition. The present environmental regulations in Canada and the United States require these sludges to be disposed of in an environmentally sound manner. Laboratory studies were conducted to determine the feasibility of solidifying and stabilizing oil and gas well sludges using portland cement, fly ash, lime, and sodium silicate mixtures. Oil well sludge samples from a site in Alberta, Canada, were mixed with various proportions and different combinations of the solidifying agents. Compressive strength tests were conducted to determine an optimum formulation of cement and fly ash that may be used to solidify the sludge. Hydraulic conductivity and microtoxicity tests were conducted on the solidified samples. The test results indicate that oil and gas well sludges in a semiliquid state with a solid content greater than 30% and having moderate toxicity can be effectively solidified using cement and fly ash mixtures with 15% of each by weight of solids in the sludge. Addition of 1% sodium silicate by weight of cement accelerates the strength development. Solidification also reduces the toxicity of sludges.
总页数：	Transportation Research Record. 1995. (1486) pp35-41 (4 Fig., 6 Tab., 15 Ref.)
报告类型：	科技报告