As an important factor affecting acid leak-off in carbonate reservoir,acid wormhole has been concerned.

When acid flow along the fracture, the wormhole was developed because some of rock pore or nature fractures are denuded by the acid, thus the filtrateloss of the acid mostly occurs in wormhole.

When acid fluids flow in artificial fractures, some larger pores or natural fractures are dissolved by acid to enlarge into wormholes so that acid mainly leaks through wormholes.

Through the research on the expanding law of wormhole,this paper sets down the maximum penetrating distance as the index of optimal acidizing scale,and forms the acidizing process and its matching technology for carbonate reservoir of ultra-deep wells.

Effects of Nickel Content and Simulated Heat Affected Zone of 2205 Duplex Stainless Steel on Pitting Corrosion;

The influence of different concentrations of CO2-3 on the resistance to pitting corrosion was investigated in bittern for 2205DSS by electrochemical polarization carves and electrochemical impedance spectra.

The electrochemical characteristics of pitting corrosion of X70 pipeline steel in phosphate buffer solution were studied in this paper.

On the inhibiting law and its mechanism of rare earth for the pitting corrosion of aluminium alldy in aqueous chloride solution;

Features of electrochemical noise during pitting corrosion of 2024-T3 aluminum alloy in 3.0% Na_2SO_4 solution;