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In order to improve the oil-displacement effect of microspheres, larger particles of cross-linked polymer were synthesized by inverse emulsion polymerization to match cores with biggish duct. Before hydration, particle sizes of microspheres are a few hundred nanometers, the particle sizes can increase by about 10 times after hydration, which shows that cross-link polymer microspheres have well expanding...
Three inorganic compounds, K2CO3, K2SO4, KCl have been investigated with regard to their catalytic effects on pyrolysis of tannery sludge by thermal analysis experiments. The influence of catalyst categories and dosage on sludge pyrolysis were studied by the comparison and analysis of the TG ( thermogravimetry ) and DTG(derivative thermogravimetry) curves derived from tests of differential thermal...
Our research focused on the Characteristics of HPAM degradation, using 11 hydrolyzed polyacrylamide degrading bacteria strains that were gained from Daqing field. In this study, we demonstrated that the degradation capability of the mixed strains was stronger than each single one. In addition, Infrared spectrum analysis and Gas Chromatography analysis on HPAM degradation products showed that, parts...
In this paper, a new active agent is investigated, which can be used in the condition of high temperature and high salinity, including the ability to reduce interfacial tension and interfacial tension stability, and the preparation of polymer surfactant flooding system with this active agent. Oil displacement experiment is operated by the physical simulation, the homogeneous and heterogeneous artificial...
Based on a series of static foaming experiments of foam-combined system, and by introducing a parameter, the comprehensive foamability, this paper put forward a new method to evaluate the foaming characteristics and foam stability of foam-combined system. Moreover, this paper has set up corresponding empirical formula. In glass capillary test, the effects of surfactant type, surfactant texture, polymer...
A new kind of flocculants, named Polymer Silicate Phosphate Ferrous Sulfate(PSPFS), was synthesized with ferrous sulfate as main material and silicate and phosphate as additive. The influencing factors and synthesis technology of PSPFS were determined by studying the treatment of high-viscosity oil petrification wastewater of Liaohe Pertrochemical Corporation. The influencing factors level were determined,...
Environment acceptable modified natural macromolecule based drilling fluid is mainly composed of shale inhibitor agent IND30, fluid loss control agent NAT20, bloomless white asphalt NFA-25 and dry powder of polyalcohols PGCS-1, which are biodegradable and environment acceptable. Results of rheological property tests of based mud, IND30 mud, NAT20 mud, NFA-25 mud and environment acceptable modified...
The thermal drift of the characteristic wavelength of fiber Bragg gratings (FBGs) photowritten in the core of microstructured fibers (MOFs) is significantly reduced by inserting a liquid of suitable refractive index into their holes. For instance, the spectral range of variations is divided by a factor of 4 over a temperature range larger than 20degC in a six-hole MOF, and the maximum sensitivity...
A long period grating (LPG) coated with polyvinyl alcohol has been developed and evaluated through exposure to a range of relative humidity (RH) levels (from 33%RH to 97%RH). The conditions for the creation of the sensor probes are described and the response of the device in terms of changes in the resonance loss of several of the spectral loss bands has been monitored. In order to make comparative...
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