论文部分内容阅读
礼乐盆地是南沙海域热点研究区域.为揭示该盆地油气资源潜力,依据礼乐盆地地震剖面、钻井及拖网资料,对礼乐盆地的油气成藏控制因素进行综合分析,进而探讨该盆地的油气成藏潜力.中生代和古新世-早渐新世沉积是主要烃源岩;晚渐新世礁体以及中生代风化碎屑岩是主要储层;识别出晚渐新世-早中新世礁体和中生代晚期风化剥蚀而形成的断块构造是最主要的圈闭类型.长期活动断层沟通底部中生代地层和浅层礁体,是主要的油气垂向运移输导体,控制了礼乐盆地油气的空间分布.晚中新世的菲律宾弧碰撞运动类似南海北部东沙运动,有利于排烃和油气运移,之后构造活动减弱,有利于稳定成藏.礼乐盆地具备油气成藏的6大要素条件,盆地中、东部断裂发育区是盆地油气运聚成藏的优势前景区域.
In order to reveal the potential of oil and gas resources in this basin, based on the seismic profiles, drilling and trawling data of the Liyue basin, the ritual and sounding basin is a hot research area of the Nansha Sea Basin, in order to reveal the hydrocarbon accumulation potential in this basin. The Mesozoic and Paleocene-Oligocene sediments are the main hydrocarbon source rocks. The Late Oligocene and Mesozoic metamorphic clastics are the main reservoirs. Late Oligocene-Early Miocene reefs are identified The fault block formed by weathering and denudation in the late Mesozoic and Mesozoic is the main trap type.The long-term active faults communicate with the bottom Mesozoic strata and shallow reefs, which are the main vertical transporters of oil and gas, The late collision movement of the Philippine arc during the Late Miocene is similar to the Dongsha movement in the northern part of the South China Sea, which is favorable for hydrocarbon expulsion and hydrocarbon migration, after which the tectonic activity is weakened and is favorable for the stable accumulation of reservoirs. Condition, the middle and eastern fault development areas in the basin are the predominant prospect areas for hydrocarbon accumulation and accumulation in the basin.