This paper discusses satellite data usage in monitoring the surface oil pollution in the off-shore oil-producing area "Oil Rocks"in the Caspian Sea. For this study, we examined satellite SAR and VIS data taken over the region of interest in 2017-2020. All in all, we analyzed 558 satellite images. First of all, we present some statistics on the detectability of natural oil showings in SAR and VIS data. We show that the frequency of reliable detection of natural oil showings in satellite images varies greatly and depends sufficiently on a sensor type and the season. We state that the seasonal variability in the detection rate of natural oil showings on the sea surface is most pronounced for the VIS data. We show statistics on individual sizes of oil patches and describe their seasonal and inter-Annual variability. We also present statistics on the frequency of detecting oil patches in the Oil Rocks oil-producing area in SAR images depending on near-surface winds and ocean-Atmosphere boundary layer conditions. We compare our new results with those obtained in our previous long-Term satellite survey of the Caspian Sea and discuss the reliability of quantitative estimates of surfaced oil amounts based on the satellite images. Further, we depict a detailed map of the spatial distribution of oil slicks detected in satellite imagery taken over the oil-producing area and outline high-risk areas of the sea surface oil pollution and areas exposed to potential risks.