Tight oil reservoirs are buried deeply, its permeability is low, and it is easily influenced by sensitivity. So, it is important to study the sensitivity of tight oil reservoir to prevent reservoir damage and improve oilfield efficient development. However, due to the difficulty of water injection in tight reservoirs, the flow velocity is slow and takes longer time. In this paper, an evaluation method of reservoir sensitivity flow experiment was adopted, and sensitivity experiment on some rock samples of four wells in Xinjiang Jimsar basin Formation tight oil was conducted. The results show that the average damage of water sensitivity is 43.64%, velocity sensitive damage is 24.3%, salt sensitivity damage is 33.80%, acid sensitivity damage is 15.66%,and the critical velocity is 24.63 m/d. This tight oil reservoir has medium water sensitivity and salt sensitivity while weak acid sensitivity and velocity sensitivity. Base on the research above we have a certain understanding of this reservoir's sensitivity, which provides a theoretical basis for rational exploitation of the oilfield and reduces the damage of tight reservoir.

The marine fuel was prepared from residual oil, the ethylene tar and the shale oil. The effects of harmonic ratio, the temperature, different hydrophilic lipophilic balance (HLB) and the compound surfactants exchange on the oil viscosity were studied. The experiment results show that when the m(residue)/m(ethylene) =1∶1.25 and m(tar residue)/m(shale oil)=1∶1.00 blend oil not only viscosity at 180# marine fuel oil products indicator, and the flash point and stability are in line with national standards. When add HLB=12 with anionic and non-ionic surfactant blend oil viscosity significantly reduced. When compound surfactant added at 0.3 persent, the viscosity to a minimum.

A series of MCM －２２zeolite catalyst samples were prepared with nitric acid，hydrochloric acid ，acetic acid and formic acid as the peptizators．The zeolites were characterized by means of particle strength apparatus and TG －DTA apparatus to investigate the effect of peptizators on the physical properties of MCM －２２catalyst．The results show that the strength and total acid of zeolites with inorganic acid as peptizator are higher than the zeolites with organic acid．With the increasing nitric acid dosage，the mechanical strength of the zeolite catalyst increases at first and then decreases，with the maximal catalyst strength being obtained at a dosage of １０%．The total acid is enhanced by adding the appropriate amount of nitric acid．Taking the alkylation of benzene with propylene as a model reaction，the catalytic performances of the MCM － ２２ zeolite catalysts were evaluated by means of a semi－continuous gas －liquid reactor and a liquid－liquid continuous reactor．The experimental results show that activity and selectivity of zeolite in inorganic acid is stronger than that in organic acid．When the nitric acid dosage is
less than ２０％，the activity of MCM －２２ zeolite is increased with increasing of nitric acid dosage．The selectivity to cumene reaches a maximum value when nitric acid dosage is １０％．

 

Fe and Ni nanopowders were prepared in mixture gas of H ₂ and Ar by arc discharge method. High-melting-point metals W and Mo were added to the raw material (bulk Fe or Ni). The structure, morphology and sizes of the nanopowders were analyzed using X-ray diffraction, transmission electron microscopy, BET, oxygen-nitrogen analysis and chemical analysis. The results show the oxide layer of Fe and Ni is destroyed and the temperature of melting sphere of Fe and Ni is increased due to adding high melting sphere of W and Mo, the productivity of nanopowders has been improved by 50%. The mass fraction of W and Mo in the as-prepared samples is only about 0.01%, and the purity of nanopowders is almost unchanged. The average sizes of Fe and Ni nanopowders are slightly increased under the same condition including atmosphere and pressure as well as power when high melting point metal is added into raw materials. The productivity of adding W in the raw materials is higher than that of adding Mo.