摘要
临清坳陷晚古生代地层是胜利油田勘探的重要层位,研究其煤成气储层特征对该区油气资源勘探和能源接替有重要意义。以沉积学、岩石学和地层学为主要研究手段,在总结该区晚古生代沉积体系及沉积相基础上,分析了山西组和石盒子组等地层中的砂岩储层物性特征。研究发现:该区主要存在四大沉积体系,即潮坪沉积体系、障壁-泻湖沉积体系、河控浅水三角洲沉积体系及河流-湖泊复合沉积体系,其中,三角洲分流河道砂体、大型河流、湖泊及湖泊三角洲沉积砂体成为煤成气的有利储层;这些储层的岩石类型主要有长石砂岩、石英砂岩、岩屑砂岩及硬砂岩等,且石英砂岩以奎山段较发育,长石石英砂岩多发育于山西组。
The strata of Late Palaeozoic in Linqing depression are an important exploration horizon of Shengli oilfield. Studies on the reservoir of coal-formed gas will play an important role in oil-gas resources exploration and the replacement of energy. This paper has taken the sedimentology, petrology and stratigraphy as the main research means. Having summarized the sedimentary systems and sedimentary facies of Late Palaeozoic, the paper analysed the physical characteristics of the sandstone reservoir in Shanxi Formation, Shihezi Formation and so on. Study showed that there are four sedimentary systems, that is, the tidal flat sedimentary system, the barrier-lagoon sedimentary system, the river-controlling shallow water delta sedimentary system and the river-lake compound sedimentary system. Among which, the distributary channel sand body of delta, the sedimentary sand body in the large river, lake and lake-delta are the favorable reservoir of coal-formed gas. The main rock types of the reservoir are the feldspar sandstone, quartz sandstone, lithic sandstone and the hard sandstone. The quartz sandstones are quite developed in Kuishan section, and the feldspar-quartz sandstones are quite developed in Shanxi formation.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2010年第4期7-11,15,共6页
Coal Geology & Exploration
基金
国家自然科学基金项目(40742010)
战略选区课题"华北上古生界储层沉积学研究"(2009GYXQ17-2)
山东省高校沉积成矿作用与沉积矿产重点实验室(山东科技大学)开放基金项目(DMSM200808)
关键词
临清坳陷
煤成气
沉积体系
储层
Linqing depression
coal-formed gas
sedimentary system
reservoir
