As a kind of clean and efficient low-carbon energy,ight sandstone gas is of great significance to the transformation and upgrading of energy consumption structure and the realization of the goal of"carbon peak-ing and carbon neutrality".The formation characteristics and enrichment laws of tight sandstone gas in the Per-mian Jiamuhe Formation in Zhongguai area,northwest margin of the Junggar basin,are unclear.Based on drilling,logging,3D seismic,core and experimental analysis and testing data,the geological characteristics,en-richment laws and main controlling factors for high production of tight sandstone gas reservoirs in the study area are comprehensively analyzed.The research results show that the tight sandstone gas type of the Permian Jia-muhe Formation in Zhongguai area is mainly composed of oil type gas,coal type gas and mixed gas.The gas source is mainly from the source rock of Fengcheng Formation and Lower Wuerhe Formation in Shawan Sag.The source rock of the Jiamuhe Formation may supply hydrocarbon,which has the characteristics of multi-source hydrocarbon supply;The gas reservoir type is a lithologic stratigraphic trap type,with characteristics of distant source migration and multi-stage accumulation and accumulation;The dense reservoir is eroded by tur-bidite minerals and other minerals,forming relatively good physical properties in local areas as reservoir"sweet spots".They are mainly distributed in the eastern part of the study area,and vertically,they mainly de-velop in the depths of 4 320～4 640 m and 4 830～4 900 m,with high yield layers mainly concentrated in the upper"sweet spots"zone.The enrichment and high production of tight sandstone gas reservoirs are con-trolled by the favorable diagenetic facies zones of reservoir"sweet spots"and locally developed paleo-uplift and structural fractures.
关键词
致密砂岩气/成藏特征/富集规律/佳木河组/中拐地区/准噶尔盆地
Key words
tight sandstone gas reservoir/accumulation characteristics/enrichment law/Jiamuhe Formation/Zhongguai area/Junggar basin
维普
万方数据