周口店地区中生界充填序列和沉积演化
发布时间：2019-06-13 06:42
【摘要】：华北地区中生界是中国油气勘探的重要目的层。周口店地区中生界广泛发育,野外露头条件良好,根据车厂剖面和南车营剖面的实测资料和岩石薄片镜下观察,描述了中生界岩性组成、典型沉积构造、沉积充填序列和沉积环境。依据中生界野外样品物性测试结果,简要分析了中生界砂岩的储集性能和窑坡组煤系地层在华北地区致密砂岩气资源勘探中的利用价值。研究结果表明:周口店地区中生界主要为内陆火山和山间盆地的复杂碎屑堆积物;总体以河流、三角洲、滨浅湖相沉积环境为主,并伴随火山活动;(扇)三角洲和河流砂体为主要储层,储集空间以次生孔隙和微裂缝为主,储层物性在空间上具有很强的非均质性;窑坡组炭质泥岩已进入生气阶段,大部分成熟度较高(R_o大于2%),可作为华北地区致密砂岩气勘探的重要层位。
[Abstract]:The Mesozoic in North China is an important target layer for oil and gas exploration in China. The Mesozoic is widely developed in Zhoukoudian area, and the outcrop conditions in the field are good. According to the measured data of the car factory section and the Nanqaiying section and the observation of the rock sheet under the microscope, the lithologic composition, typical sedimentary structure, sedimentary filling sequence and sedimentary environment of the Mesozoic are described. Based on the physical properties of Mesozoic field samples, the reservoir performance of Mesozoic sandstone and the utilization value of Yaopo formation coal measures strata in the exploration of tight sandstone gas resources in North China are briefly analyzed. The results show that the Mesozoic in Zhoukoudian area is mainly a complex clastic accumulation of inland volcanoes and intermountain basins, which is mainly composed of rivers, deltas and shoreline lacustrine sedimentary environments, accompanied by volcanic activity. (fan) Delta and river sand bodies are the main reservoirs, the reservoir space is dominated by secondary pores and microfractures, and the reservoir physical properties have strong heterogeneity in space. The carbonaceous mudstone of Yaopo formation has entered the gas generation stage, and most of them have high maturity (R 鈮，
本文编号：2498321
[Abstract]:The Mesozoic in North China is an important target layer for oil and gas exploration in China. The Mesozoic is widely developed in Zhoukoudian area, and the outcrop conditions in the field are good. According to the measured data of the car factory section and the Nanqaiying section and the observation of the rock sheet under the microscope, the lithologic composition, typical sedimentary structure, sedimentary filling sequence and sedimentary environment of the Mesozoic are described. Based on the physical properties of Mesozoic field samples, the reservoir performance of Mesozoic sandstone and the utilization value of Yaopo formation coal measures strata in the exploration of tight sandstone gas resources in North China are briefly analyzed. The results show that the Mesozoic in Zhoukoudian area is mainly a complex clastic accumulation of inland volcanoes and intermountain basins, which is mainly composed of rivers, deltas and shoreline lacustrine sedimentary environments, accompanied by volcanic activity. (fan) Delta and river sand bodies are the main reservoirs, the reservoir space is dominated by secondary pores and microfractures, and the reservoir physical properties have strong heterogeneity in space. The carbonaceous mudstone of Yaopo formation has entered the gas generation stage, and most of them have high maturity (R 鈮，
本文编号：2498321
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