【作者】 赵撼霆；

【导师】 吴时国；

【作者基本信息】 中国科学院研究生院（海洋研究所） ， 海洋地质， 2011， 硕士

【摘要】 世界生物礁油气资源非常丰富,随着生物礁油气勘探开发的不断深入,生物礁油气探明储量和产量不断增加,所占比重越来越大。南海是我国最大的边缘海,其特殊的构造背景、多种类型礁的发育和良好的生储盖组合等都决定了南海生物礁油气勘探的广阔前景。南海是西太平洋最大的边缘海,其在形成演化过程中出现了有利于生物礁生长发育的环境。东沙隆起在中新世时期属于浅海环境,远离物源区,温度、盐度和水深适宜生物礁的生长和发育。通过地震资料的解释、测井、岩心资料的综合分析并与相对海平面变化曲线对比,认为东沙隆起发育有大量规模不等的生物礁,且其发育演化与相对海平面变化曲线和区域构造演化阶段可以对应起来。相对海平面的旋回性变化和复杂的构造演化过程结合,使得研究区生物礁具有较好的孔渗性,可以成为有潜力的油气储层。根据相对海平面的变化曲线,生物礁的发育演化分为四个阶段:海平面缓慢上升阶段;海平面快速上升阶段;海平面保持稳定-海平面的下降阶段;新一轮的海侵过程。LH11-1-1A井的储层孔隙类型包括粒间孔、粒内孔、晶间孔、铸模孔和裂缝等。更多还原

【Abstract】 Hydrocarbon resource distributing in the organic reef areas all over the world is so rich that it is estimated that it will exceed 5 billion tons of oil. With continuous development of the oil exploration and production, hydrocarbon resource in bioherm reservoirs will increase greatly. The recent oil exploration situation of bioherm reservoirs in the world is reviewed. South China Sea is the largest marginal sea in China and various kinds of organic reefs existed and buried in it. The peculiar geological conditions and the favorable bioherm reservoir conditions contribute to a good prospect for oil exploration.The South China Sea is the biggest marginal sea in the West Pacific and its evolutionary process supply proper growing environment to the reef. Dongsha massif was the shallow water and far from provenance supply area in the Miocene,its temperature, salinity and water depth were fit for the reef growth.According to the multidisciplinary analysis of seismic data interpretation, well logging and core data,conbining to the relative sea level curve of variation,we hold the point that plent of reef developed in Dongsha Massif,and their growth was correspondent to the relative sea level curve of variation and areal structure evolution period. The relative sea level cycling variation and the complicated structure evolution made reef in the study area had good poroperm characteristics,and became potential gas and oil reservoir. According to the relative sea level curve of variation, the development of reefs evolution is divided into four stages: sea-level slow rise stage; Sea-level rise fast stage; Sea level remained stable - sea-level drop stage; A new round of transgression process. The reservoir types of LH11-1-1A Wells included interparticle pore, intracrystal pore, intercrystal pore,moldic pore and crack, etc.更多还原