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琼海凸起发现多个油田和含油构造，但本身不具备生烃能力，因此研究油气来源问题对下一步勘探部署十分重要。成藏流体在油区范围内呈非均质性分布，这种特征实际上是油气运聚、成藏复杂性的真实记录。从该角度出发，详细解剖文昌１３－２油田原油成熟度、含氮化合物及原油物性等非均质性分布特点，并以此为基础，细划出各油田的充注方向和充注期次，同时结合区域地质资料，探讨了珠三坳陷琼海凸起油气运聚特征。研究认为，该区目前发现的油气主要来源于文昌Ｂ凹陷文昌组滨浅湖相烃源岩，且存在珠江期和粤海─第四纪两次大的运移期。琼海凸起与文昌Ｂ凹陷过渡部位的北部斜坡带是油气运移的必经之道，具备油气富集、非构造圈闭发育的条件，是今后勘探部署的有利场所。
The discovery of a large number of oil fields and oil-bearing structures in Qionghai Bay, but not hydrocarbon generation per se, is of great importance to the future exploration and deployment of oil and gas sources. The reservoir fluids are heterogeneously distributed in the oil zone, which is actually a true record of hydrocarbon accumulation and accumulation. From this point of view, we dissect the heterogeneity distribution of crude oil maturity, nitrogen compounds and crude oil properties in Wenchang 13-2 oilfield in detail, and draw a detailed description of filling direction and filling period of each oil field , Combined with the regional geological data, explored the Qionghansu Qionghai convex hydrocarbon migration and accumulation characteristics. The study suggests that the oil and gas discovered in this area mainly come from the source rocks of Wenchang Formation in Wenchang Formation of Wenchang B depression, and there are two large migration periods of the Pearl River period and the Yuehai-Quaternary period. The northern slope zone between the Qionghai bump and the Wenchang B depression is the only way for the migration of oil and gas, and has the conditions for the enrichment of oil and gas and the development of non-structural traps. It is a favorable site for exploration and deployment in the future.