特种油气藏2018，Vol.25Issue(2)：1-6,6.DOI:10.3969/j.issn.1006-6535.2018.02.001
地表风化在地层油藏碎屑岩储层中的作用
Effect of Surface Weathering on Stratigraphic Clastic Reservoir
摘要
Abstract
The weathering process,reservoir space and physical properties of the clastic reservoir in stratigraphic trap are studied by the core observation,composition test,physical property statistics and other analysis of the sam-ples from more than 230 wells in Jiyang Depression. Research indicates that the clastic rock weathering mainly in-volves in the corrosion and alteration of feldspar,calcite and other minerals. The mineral volume variation before and after weathering creates a large amount of secondary pores and fractures,which are considered as the predomi-nant reservoir space for the weathering clastic reservoir.Comparing with the original parent-rock properties,the res-ervoir porosity can be maximally increased by 20% and the reservoir permeability can be maximally increased by 100×10-3μm2by weathering. The enhancement of physical properties mainly dependent on lithology,burial depth, unconformity scale and many other factors. The surface weathering is a key factor for the reservoir oiliness. This re-search has been successfully applied to the exploration deployment of Gaoqing Oilfield and other stratigraphic reser-voirs,which could enhance the corresponding reserve and production in this area.关键词
济阳坳陷/碎屑岩/地层圈闭/不整合/风化作用Key words
Jiyang Depression/classic rock/stratigraphic trap/unconformity/weathering分类
能源科技引用本文复制引用
陈涛..地表风化在地层油藏碎屑岩储层中的作用[J].特种油气藏,2018,25(2):1-6,6.基金项目
中国石化科技攻关项目"东营凹陷南部地层超剥带精细描述与目标评价"(P13039) （P13039）
中国石化胜利油田分公司博士后项目"东营凹陷地层油藏成藏主控因素及勘探方法研究"(YKB1603) （YKB1603）
