The South China Sea is a marginal sea of the Western Pacific Ocean. It is the biggest sea by size. It is bounded in the north by the shores of South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan.
Petroleum is called mineral oil. It is an inflammable mixture of oily hydrocarbons. Like coal, petroleum is also a fossil fuel. It is generally taken that the oil has been derived from buried marine organisms. In areas where the sedimentary strata have been folded, most of the oil comes from anticlines rather than synclines.