The analytic hierarchy process is introduced to construct energy efficiency index system of gathering and transportation system, which provides a favorable means for energy efficiency evaluation of the system as a whole. Combining with the triangular fuzzy number in fuzzy theory, the judgment matrix construction and weight calculation of AHP are reformed. To some extent, it reduces the defects of hierarchical analysis, such as the strong subjective factors of legal person and the neglect of the model of people's cognition of objective things, and makes the evaluation results more accurate and comprehensiv. Taking a gathering and transportation block of oilfield as an example, the weakness of its energy consumption is found out, and the improvement suggestions are put forward.

A reactor with a volume of 50 mL was used as a container to carry out hydrothermal liquefaction of enteromorpha and solvent under high temperature and high pressure conditions.The purpose of this experiment was to investigate the effects of various reaction conditions on the distribution of hydrothermal liquefaction products and the composition of bio⁃oil products,such as reaction time,reaction temperature,liquid⁃to⁃liquid ratio and ethanol ratio in solvent.The experimental results show that the reaction time is 45 minutes,the reaction temperature is 300 ℃,the liquid to material ratio is 40∶4.0,and the proportion of ethanol in the solvent is 50%,which is the most suitable reaction condition for the hydrothermal liquefaction of enteromorpha,and the yield of the obtained bio⁃oil is 45%.In addition,by GC⁃MS analysis of bio⁃oil components,the addition of ethanol in the solvent caused the alcoholysis reaction of the amide compound in the bio⁃oil product which increased the content of the ester compound and improve the quality of bio⁃oil.

Aiming at the problem of reasonable formation pressure and reasonable flow pressure in low permeability oilfield, the variation law of formation pressure under different water cut, recovery degree and injection-production ratio was studied, a new method for calculating reasonable formation pressure was established, and the rational strat igraphic pressure range and the adjustment of pressure system in each block in Pubei area was obtained. Considering the effect of water content and liquid production on correcting the actual IPR curves of each fault block in Pubei area the reasonable flow pressure range of each fault block was calculated, the correction equation of inflow performance under various connected conditions of single well in Pubei area was established, and the reasonable flow pressure range of some single well was calculated. The results show that the evaluation method of formation pressure and flow pressure is more reasonable. According to the calculated minimum reasonable formation pressure and the minimum reasonable flow pressure of each fault block, the oil increasing effect of the adjustment well is obvious and the formation pressure tends to be reasonable. The gas influences of the wells were well controlled and the pump efficiencies were improved by adjusting flow pressure.

P3HT and P3DDT were synthesized by the method of FeCl₃. Chemical structures were characterized by gel permeation chromatography(GPC) and 1H-NMR, thermal stability was studied by Tg. The absorption, fluorescence properties and the band gap of them in chloroform solutions and their spin-coating films were studied. The maximum Uv-vis wavelength of P3HT and P3DDT in chloroform solutions were 420 nm and 413 nm, respectively, and their corresponding emitted wavelengths are 602 nm and 573 nm.The maximum Uv-vis wavelength of their spin-coating films are 430 nm and 415 nm respectively, and their corresponding emitted wavelengths are 622 nm and 589 nm. Band gap data are 1.9 eV and 2.2 eV, respectively.