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In this paper, we have studied the ratio between light ends to heavy ends in different mixtures of diesel with two grades of crude oil utilizing gas chromatography.
Part of any well completion job is the installation of multiple casings to isolate the well from any other reservoirs such as water aquifers. The space between each two casings is called the annulus. There are two kinds of annuli; tubular-casing annulus (TCA) and casing-casing annulus (CCA). While CCA is maintained at zero pressure, TCA should be maintained at positive pressure and this is usually accomplished by displacing the TCA with inhibited diesel. This practice would enable the quick detection of any possible casing leaks or downhole failure due to corrosion leading to TCA communication; either surface or downhole during production. The composition of diesel is mainly C9+ with a very minimum amount of light ends C3 to C7. Arab Light crude oil on the other hand is rich in light ends mainly because of the associated gas. In this paper, we have studied the ratio between light ends to heavy ends in different mixtures of diesel with two grades of crude oil utilizing gas chromatography. This will help production engineers for the early detection of any possible downhole communication caused by corrosion to maintain the well integrity. This study was conducted to assist one of the giant Arab Light reservoirs in the world as well as two additional reservoirs.
Keywords: well integrity, casing, annulus, BTEX, n-alkane, diesel.
This paper shows the results of the stress corrosion cracking evaluation of two different austenitic corrosion resistant alloys (CRAs), N08028 and N08825 under different conditions of temperature and pressure of H2S and CO2.
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Oil storage tanks experienced accelerated corrosion from the soil side. The short term strategy adopted was to drill under the tanks and inject vapor phase corrosion inhibitors to extend the tank floor life in a risk-rated phased effort for the 48 tanks.
Results from novel transparent autoclave experiments. Carbon steel corrosion coupons were exposed to impurities levels within established specifications at simulated transport conditions (25 °C and 10 MPa of CO2).