摘要
以西江主洼为例,抓住洼陷结构控制沉积体系发育的核心思想,在层序地层、生长地层、构造演化、剥蚀改造、地震相和沉积相等综合研究基础上,总结了一套适用于改造型洼陷的烃源规模识别技术:①考虑控制沉积期湖盆分布广度和沉积厚度的构造参数,拟合一套计算方法用来半定量化计算烃源规模随控洼断裂走向的变化趋势;②在层序格架下,以生长地层理论、构造演化分析和剥蚀改造模型为依据,确立洼陷内不同位置差异构造活动特征,并在此基础上从构造差异活动控差异沉积角度定性预测烃源岩的空间分布特征;③半定量化计算与定性分析相互佐证,形成一套适用于改造型洼陷的烃源规模识别技术。利用该项技术对西江主洼的烃源规模进行评价,对西江主洼及类似洼陷的油气勘探具有指导意义。
Combing studies in sequence stratigraphy,growth strata,tectonic evolution,denudation transformation,seismic facies,and sedimentary facies,we summarized the technology for identification of hydrocarbon source rock applicable for reformed sags in the case of the Xijiang Main Sag of the Pearl River Mouth Faulted Basin.Based on the growth stratigraphy,tectonic evolution,and erosion history,differential tectonic activities were characterized at different locations of the sag in the sequence framework,on which the spatial distribution of source rocks were qualitatively predicted in perspective of differential tectonics and sedimentation.Meanwhile,considering the structural parameters controlling the distribution breadth and sediment thickness in the half-graben basins,an equation was established to semi-quantitatively calculate the tendency of variation of hydrocarbon source scale vs the strikes of controlling faults.In addition,the results of semi-quantitative calculation and qualitative analysis were compared and testified each other,from which a set of hydrocarbon source identification technology were proposed to evaluate the source rocks in the Xijiang Main Sag,and good results have been achieved.
作者
梁杰
刘培
陈维涛
姚佳利
唐明铭
董小云
LIANG Jie;LIU Pei;CHEN Weitao;YAO Jiali;TANG Mingming;DONG Xiaoyun(Shenzhen Branch of CNOOC(China)Ltd.,Shenzhen 518054,China)
出处
《海洋地质前沿》
CSCD
北大核心
2022年第6期78-87,共10页
Marine Geology Frontiers
基金
中海石油(中国)有限公司科技项目“南海东部油田上产2000万t关键技术研究”(CN00C-KJ135ZDXM37SZ).
