摘要
通过类比国外页岩气盆地的页岩有机质类型、有机碳含量、热演化程度、厚度等指标,初步确定辽河油田东部凹陷存在发育页岩气藏的条件。页岩吸附气量实验研究表明,东部凹陷页岩吸附气量与暗色泥页岩有机碳含量和热演化程度呈正比关系,东部凹陷页岩吸附气量为0.2-1.2m3/t,与加拿大Gordondale页岩和中国四川盆地下志留统龙马溪组页岩基本相当。利用气测全烃值,结合有机碳含量、热演化程度、含气页岩厚度等指标,对不同层系页岩含气性进行了整体评价。依据评价结果,指出驾掌寺—二界沟洼陷为东部凹陷内页岩气勘探的首选目标。
In comparison with the organic matter type,organic carbon abundance,thermal maturity and thickness of source rocks in shale-gas-bearing basins abroad,the present paper preliminarily confirmed the conditions for shale-gas accumulation in the Eastern Sag of the Liaohe Oilfield.The experimental study on gas amounts absorbed by shales indicated that there existed a positive correlation between the absorbed gas amount and the TOC and thermal maturity of dark mud shales in the Eastern Sag,and its adsorbed gas amount was 0.2～1.2 m3/t,basically equal to that of the Gordondale shale in Canada and the Lower Silurian Longmaxi Formation shale of the Sichuan Basin.A comprehensive evaluation on gas-bearing properties of shales in various formations was made by using abnormal values from the total hydrocarbon by gas logging and being combined with other criteria,such as TOC,Ro,thickness of the corresponding shales,therefore,the most favorable block for shale-gas exploration within the Eastern Sag was targeted for the Erjiegou-Jiazhangsi area.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2011年第3期450-458,共9页
Acta Petrolei Sinica
基金
国家自然科学基金项目(No.40672087和No.40472073)资助
关键词
辽河油田
东部凹陷
页岩气
吸附气
含气性
气测全烃
有利勘探区
Liaohe Oilfield
Eastern Sag
shale gas
adsorbed gas
gas-bearing property
total hydrocarbon by gas logging
favorable exploration block
