The physical and chemical properties and corrosion resistance performances of overseas H_2S-corrosion resisting welded pipes were analyzed and performance specifications of X52 grade H_2S-corrosion resisting.
Motivated by the physical concept of special geometry, two mathematical constructions are studied which relate real hypersurfaces to tube domains and complex Lagrangian cones, respectively.
The effectiveness of accounting correctly for the geometry of the sphere in the wavelet analysis of full-sky CMB data is demonstrated by the highly significant detections of physical processes and effects that are made in these reviewed works.
In this study, the Water saturations in a tWo-dimentional physical modelof oil reservoirs Were monitored With 3 cm Wavelength, and families of sharpeurves of both Waterflood and oilflood fronts Were obtained, which consistedwith Buckly-Leverett's theoritical curves; the correlations befWeen micro-Wave signal attenuatons and the Water saturation Sw, porosity φ,and thick-ness H of the model were derived and proved.Through experiments the corre-lative curves of received microWave signals Vg (or Ig) vs.S_...
Four types of flooded formations have been noticed in the Shengli oil field on the introduction of water flooding,each with its own electric properties and different way of differentiation. Based on the changes in the salinity of water,oil saturation and physical pro- perties of reservcirs,six methods are proposed for differentiation.For forma- tions flooded with fresh water,observation of the shifting of S.P.curve base line and application of induced potential may help discern whether the reservoir i...
Different partially hydrolytic products of polymethyl methacrylate(HPMMA) with relatively high molecular weight can reduce effectively the water loss of the sea water-base mud at temperature high up to 180℃.The quantities used vary from 1.5% to 3% depending upon the molecular weight and the degree of hydro- lysis of the polymer.It was found that HPMMA suffered from thermal degrada- tion under 180℃,and its stability to temperature can be increased considerably when it was cross-linked with ethanolamine or wa...