松辽盆地北部古龙-常家围子地区登娄库组深盆气藏形成的可能性

doi:10.11743/ogg20130403

摘要/Abstract

摘要： 松辽盆地北部古龙-常家围子地区登娄库组的油气勘探程度较低,尤其是对致密砂岩气的研究尚处于起步阶段。为了证实古龙-常家围子地区登娄库组深盆气藏形成的可能性,文章从烃源岩、储层条件以及保存条件等方面系统分析了该地区登娄库组天然气成藏地质条件,并与深盆气藏成藏的基本条件进行对比。研究表明,古龙-常家围子地区登娄库组二段及其邻近地层具备深盆气藏形成的有利地质条件,即低孔-低渗的致密砂岩储层、充足持续的气源条件、烃源岩与储集层紧密叠置的接触关系以及稳定平缓的构造背景,是松辽盆地北部深盆气藏可能形成的有利地区。在古龙-常家围子地区下一步天然气勘探工作中,以登娄库组二段气源岩有效生气范围及周边地区为重点区域,以登二段及其邻近地层为重点层位,将有机会获得深盆气藏的勘探突破。

关键词: 成藏条件, 深盆气藏, 登娄库组, 古龙-常家围子地区, 松辽盆地

Abstract: The Denglouku Formation in Gulong-Changjiaweizi region is still immature in petroleum exploration,especially for tight sand gas.Based on a systematic analysis of gas accumulation conditions in respects of source rock,reservoir and preservation and a comparison with the basic accumulation conditions of deep basin gas reservoir,we discussed the f possibility of formation of deep basin gas reservoir in the Denglouku Formation of Gulong-Changjiaweizi region.The results show that the 2^nd member of Dengkouku Fm (K₁d²) and its conterminous layers in Gulong-Changjiaweizi region have favorable geological conditions for the accumulation of deep basin gas,including tight sandstone reservoirs with low porosity and low permeability,abundant and continuous gas charging,stable and gentle structural background as well as close superimposition of source rocks and reservoirs.Therefore,the Gulong-Changjiaweizi region could be favorable for accumulation of deep basin gas in the northern Songliao Basin.The K₁d² and its conterminous layers within the effective gas generation area of K₁d²source rock and its periphery may be the major target for future deep basin gas exploration.

Key words: accumulation condition, deep basin gas reservoir, Denglouku Formation, Gulong-Changjiaweizi region, Song-liao Basin

中图分类号:

TE122.1

张雷,张学娟,卢双舫,等. 松辽盆地北部古龙-常家围子地区登娄库组深盆气藏形成的可能性[J]. 石油与天然气地质, 2013, 34(4): 441-449. doi: 10.11743/ogg20130403 Zhang Lei,Zhang Xuejuan,Lu Shuangfang,et al. Possibility of formation of deep basin gas reservoirs in the Denglouku Formation of Gulong-Changjiaweizi region, northern Songliao Basin[J]. Oil & Gas Geology, 2013, 34(4): 441-449. doi: 10.11743/ogg20130403

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