东营凹陷北带西段沙四上纯下—沙四下砂体沉积特征研究

东营凹陷北带西段深层裂解气勘探具有较大潜力,而储集砂体分布规律是制约该区勘探的瓶颈之一。在沉积环境分析基础上,首先利用测录井资料、岩心资料总结了该区沉积砂体类型及特征,其次利用物源分析和地震属性分析方法对砂体平面展布特征进行了研究。研究认为,该区沙四上纯下—沙四下沉积时期砂体发育,主要有近岸水下扇、滑塌浊积扇、辫状河三角洲、漫湖三角洲、冲积扇5种。深层裂解气勘探具有较大潜力,尤其是与半深湖—深湖相暗色泥岩直接对接的近岸水下扇和滑塌浊积扇砂体具有较好的源储对接关系,应继续深化研究。

Study on the sand body sedimentary characteristics of Es4scx-Es4x formation in the western part of the northern region in Dongying depression

The deep cracked gas exploration in the western part of the northern region in Dongying depression has great potential. However, the reservoir sand body distribution is one of the bottlenecks restricting the exploration in this area. Based on the analysis on the sedimentary environment, firstly, sedimentary sand body types and characteristics were summarized by using the logging da-ta and core data. And then the sand body plane distribution characteristics were studied by using the methods of provenance analy-sis and seismic attribute analysis. The studies suggested that the reservoir sand body developed in Es4scx-Es4x sedimentary peri-od mainly included nearshore subaqueous fan, slump turbidite fan, braided river delta, diffuse lake delta and alluvial fan. Due to the significant potential and the better source-reservoir butt relations with nearshore subaqueous fan and slump turbidite fan sand body directly jointed with the dark mudstone of the half deep lake-deep lake of the cracked gas exploration, researches should con-tinue to be deepen.