周口店地区中生界充填序列和沉积演化  

MESOZOIC FILLED SEQUENCES AND SEDIMENTARY EVOLUTION IN ZHOUKOUDIAN AREA

作　　者：李英文 周江羽[2] 严聪聪 赵谦[2] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266580 [2]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074

出　　处：《大庆石油地质与开发》2017年第5期26-33,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：教育部"本科教学质量工程"专项(324-G1320311635)

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。Mesozoic strata in North China are the important targets for the oil and gas exploration in China,especially in Zhoukoudian area,the strata are widely developed with the favorite outcrops,according to the actually determined data of Chechang and Nancheying profiles and the microscopic observation of the rock slices,the lithological compositions,typical sedimentary structures,sedimentary filled sequences and sedimentary environments were characterized. According to the tested results of the physical properties of Mesozoic samples,the reservoir accumulating capacity of Mesozoic sandstones and the utility value of the coal-bearing strata in Yaopo Formation in the exploration of North-China tight sandstone gas were briefly analyzed. The study achievements show that the strata in this region mainly include the composite clastic accumulated materials of the continental volcanoes and intermontane basins; in general,Mesozoic sedimentary environments in Zhoukoudian area principally include river,delta,shallow lake phases accompanied with the volcanic activities;（ fan） delta and fluvial sandbodies are the main reservoirs,the reservoir accumulation spaces are mainly the secondary pores and microcracks,the spatial distribution ofthe reservoir physical properties is very heterogeneous; the carbonaceous mudstone in Yaopo Formation has entered the gas generating phase and the maturities（ Ro） of the most are more than 2%,so it can be regarded as the important horizon of the tight sandstone gas exploration in North China.

关 键 词：充填序列 储层 中生界 周口店 

分 类 号：TE121.3[石油与天然气工程—油气勘探]