he biomass conversion to small molecule by gasification through pyrolysis is an important driving force to realize the replacement of fossil energy with bioenergy. Gasification through microwave⁃assisted pyrolysis is a common route for conversion of biomass to desired bioenergy and bioproducts. The review describes the technology of microwave enhanced pyrolysis and microwave⁃assisted catalytic gasification. In addition, this review discusses both the challenges and opportunities of biomass pyrolysis using microwave heating and the milestones that are necessary to be obtained in the future

Based on the research results in gas field developmment, this paper summarized the development of optimization at domestic and foreign from two aspects: Infilled well deployment, piped network design, pointed out the difficulties and development directions of each part, and provided reference for gas field mining. The analysis points out that there are some difficulties in algorithmic improvement and well pattern density identification in the deployment of infill wells. Further research is needed in the deployment direction of shale gas field infill wells. Model establishment and algorithm improvement are the difficulties in pipe network research, further study of three⁃dimensional terrain relief layout analysis is required.

        Water flooding development has become the only way for the ultra low permeability fractured reservoir development. However, due to the problems of reservoir micro fracture development, serious heterogeneity and critical water, resulting the water flooding recovery was low.Spontaneous imbibition oil production is an important way of oil production in this kind of reservoir, on the basis of the use of indoor experiment, the salinity of injected water, core permeability, oil saturation, surfactant, oil viscosity and temperature in a low permeability fractured reservoir were studied systematically. Experimental results show that when the environment formation water salinity is less than the mainland core layer water salinity, or joining a surface active agent could significantly improve spontaneous imbibition effect. as the permeability and oil saturation increased and the crude oil viscosity decreased; capillary imbibition became stronger and the ultimate imbibition recovery is greater; the increase of temperature can increase the initial imbibition rate, but the ultimate imbibition recovery is basically the same, the temperature is not the direct acting factors about imbibition effects in ultra low permeability fractured reservoir.

In the experiment the wastewater composition complex, contains a large amount of furan ring kind substances is a mixture of a variety of wastewater. Wastewater pH value in 1.6, the COD value in the 2.0×105 mg/L fluctuations, and salinity can up to 13%. According to the situation of water quality, using microelectrolytic method to the wastewater pretreatment, and grope for the optimum process conditions.The experimental results show that wastewater pH value is 3, carbon iron mass ratio is 1∶2, the reaction time is 3 h, the iron carbon add content is 1%, micro electrolytic process for the furan ring kind of wastewater treatment effect is good, COD removal rate can reach 57%, the total color removal rate can reach 80%.