辽河东部凸起上古生界海陆过渡相页岩气富集条件  

SHALE GAS ENRICHMENT CONDITIONS OF MARINE-CONTINENTAL TRANSITIONAL FACIES OF UPPER PALEOZOIC IN LIAOHE EASTERBN UPLIFT

作　　者：单衍胜[1] 张金川[1] 李晓光[2] 毛俊莉[2] 荆铁亚[1] 任珠琳[1] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《大庆石油地质与开发》2012年第3期13-18,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金（40472073）资助.

摘　　要：在大量钻井岩心及野外样品实验分析的基础上，探讨辽河东部凸起上古生界海陆过渡相细粒碎屑岩系页岩气富集条件及勘探前景。研究表明，上石炭统太原组和下二叠统山西组发育多套富有机质暗色泥页岩、炭质页岩及煤层，厚度较大、分布广，有机质丰度高，有机碳质量分数集中分布在3％～4％，有机质类型以Ⅲ型为主，是生气的良好母质，有机质热演化程度高，镜质体反射率分布在1．3％～3．2％，处于高成熟一过成熟的大量生气阶段，具备页岩气形成与聚集的物质基础及地化条件；孔隙和裂缝较发育，石英等脆性矿物含量高，具有较好的页岩气的储集性能且有利于后期的储层改造，与美国页岩气产层地质地化参数综合对比认为，东部凸起海陆过渡相地层具有页岩气富集的潜力。Based on a large numbers of the experiments analyses of drilling cores and field samples, the enrich- ment conditions and exploratory prospects of the shale gas in fine elastic series of rocks are explored in the upper Paleozoic marine-continental transitional facies on Eastern Uplift of Liaohe Basin. The results of the study show that several sets of dark muddy shale, carboniferous shale and coal seam are rich in organic matters and developed in Taiyuan Formation of the Upper Carboniferous and Shanxi Formation of the Lower Permian. These formations pos- sess large thickness, wide distribution, high organic matter abundance, 3% -4% mass fraction of the organic car- bon. The type of the organic matters is mainly Type 11, which belongs to much better source matter. The thermal evolution of the organic matter is very high and the vitrinite reflectance is 1.3% -3.2% , being a large amount of gas generating period from high maturity to over maturity. Therefore, the material foundations and geochemical conditions are good for shale gas generation and accumulation. Meanwhile, the pores and fractures are well-developed and furthermore high-content brittle minerals such as quartz and so on are beneficial to the formation of pretty good accumulating property and later reconstruction of the reservoirs. Compared comprehensively with the geochemical parameters of shale gas producing layers of American, the transitional facies formations in Eastern Uplift have a great potential for shale gas enrichment.

关 键 词：辽河东部凸起 上古生界 页岩气 海陆过渡相 富集条件 

分 类 号：TE122[石油与天然气工程—油气勘探]