Page 254 - Gas Wettability of Reservoir Rock Surfaces with Porous Media

238 Gas Wettability of Reservoir Rock Surfaces with Porous Media

FIGURE 6.23
New-type, efficient, and degradable degreaser solution for oily cuttings.

Table 6.21 Elemental Analysis of the Efficient and Degradable
Degreaser
Sample Element Content
C H O S N Na K Ca
(%) (%) (%) (%) (mg/L) (%) (mg/L) (mg/L)
Efficient and 41.04 8.6925 38.57 2.527 1.2 2.071 121 19
degradable
degreaser

surfactants, and K comes from added KOH to adjust pH value. N comes
from EDTA to remove Ca and Mg ions and to prevent failure of the
active ingredient in the degreaser caused by the reaction with Ca and
Mg ions.
2. Mass spectrometry analysis
Mass spectrometry of this highly efficient and degradable degreaser is
conducted (as shown in Figs. 6.24 and 6.25. Fig. 6.25 is the partially
enlarged graph of Fig. 6.24). From Fig. 6.24, it is seen that the composi-
tion of the degreaser sample is more complex, and there are many frag-
ment peaks of different mass-to-charge ratios. Fragments with 323.2
mass-to-charge ratio in the sample consist of tetrapropylene propyl ether
sulfate ions, which indicate a small number of traphenypropyl propyl
ether sulfate that is contained in the sample.