Study On Resource Utilization Technology Of Waste Drilling Fluid

Oil and gas play a very important role in the development of national economy.As China's dependence on foreign energy continues to improve.As the oil and gas production industry expands,so does its impact on the environment.Reasonable disposal of waste drilling mud,utilization of waste drilling mud resources and construction of ecological safety barrier are important scientific problems that must be faced and solved for a long time.On the basis of the investigation on the ecological environment restoration of the abandoned drilling mud in situ treatment in Changqing Oilfield in the past 30 years.Using the drilling mud in the oil and gas acquisition area of Changqing,selecting a variety of improved materials for harmless treatment,improving and fertilizing the sandy loess,planting forage grass suitable for local growth,restoring the ecological environment,realizing the sustainable development of energy production of petroleum enterprises,life of farmers and herdsmen,and ecological environment.In this article,through pot experiment,the water-based drilling fluid,the influence of Leymus chinensis and the soil after innocuity,comprehensive evaluation and discusses the feasibility of different drilling mud utilization way,in order to in situ processing drilling mud,enriching the cultivated land,improve land productivity,provide a set of more scientific,reasonable and economic,easy to promote improved technology methods.The following results were obtained:1?In situ soil treatment of drilling mud is an economical and feasible method for ecological restoration.Leymus chinensis can grow normally on sandy soil containing 10%mud.After drilling mud is applied into soil,reasonable addition of improved materials can increase the yield of Leymus chinensis and improve land productivity.Application of urea could significantly increase the yield of Leymus chinensis,but excessive application of urea decreased the yield of Leymus chinensis.The yield of Leymus chinensis was significantly increased by applying Northeast China peat.The yield of Leymus chinensis could be increased by manure fertilizer application.2?The addition of improved materials can reduce the salinization caused by the soil utilization of waste drilling mud.3?The application of desulfurization gypsum and peat significantly reduced soil p H and increased soil EC.4?The selection of desulfurized gypsum,humic acid and sheep manure organic fertilizer is of higher priority.The treatment of adding 5%biochar,applying 400 kg·hm^-2 N,13500kg·hm^-2 humic acid,applying 39600 kg·hm^-2 sheep manure organic fertilizer and 45000kg·hm^-2 desulfurization gypsum can be used as the resource utilization plan of waste drilling mud.