Francesca: The following references deal with the subject you are interested:
Alao, A. A.; Avwiri, G. O. NOISE LEVELS ASSOCIATED WITH SELECTED OIL AND GAS INSTALLATIONS IN OGBA/EGBEMA/NDONI LOCAL GOVERNMENT AREA OF RIVERS STATE, NIGERIA. Journal of Environmental Issues and Agriculture in Developing Countries, Volume 2 Numbers 2 & 3, pp. 42-47. 2010
Nwaogozie, J. L. and Owate, I. O. (2000). NOISE POLLUTION MODELING OF PORT HARCOURT REFINERY. Part 1&2. Technical Journal of Nigerian Society of Engineers, pp. 92-104. (2000).