东营凹陷博兴地区沙三段油气成藏动力学分析及综合评价

Analysis of hydrocarbon accumulation dynamics and comprehensive evaluation for Es_3 formation in Boxing area of Dongying Depression

运用油气成藏动力学分析的手段,对东营凹陷博兴地区沙三段不同油气聚集带的成藏要素、输导体系、成藏动力等条件进行详细解剖,根据各要素对成藏贡献的大小分配权值,利用加权求和建立定量评价系统,以此对成藏动力学要素进行综合分析,达到了对各油气聚集带综合评价的目的。得出了油源、输导体系、成藏动力条件均是控制油气富集的必要条件的结论,同时认为洼陷中心、南部和北部地区是油气聚集最有利的部位,而洼陷东部、西部为油气聚集相对较差的部位,为研究区沙三段油气勘探指明了方向。

This paper makes a detailed analysis for different zones of hydrocarbon accumulation in Es3 formation in Boxing area of Dongying depression in respects of reservoir-forming factors, transport system, and hydrocarbon accumulation dynamics. The weights are assigned according to the contribution of each element to hydrocarbon accumulation, and a quantitative evaluation system has been built by weighted summation. The dynamic factors of hydrocarbon accumulation are analyzed on the above basis to comprehensively evaluate each hydrocarbon accumulation zone. It is concluded that oil source, transport systems and hydrocarbon accumulation dynamics are necessary conditions of hydrocarbon enrichment; the central, south and north parts of the depression are considered to be the most favorable zones of hydrocarbon accumulation; and the east and west parts have poorer accumulations. This result provides exploration direction in Es3 of the study area.