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准噶尔盆地莫索湾—莫北地区八道湾组油气藏储层埋深大于4 000m,属典型深部致密储层。利用岩石物性、铸体薄片和扫描电镜等数据和资料,对八道湾组深部储层基本发育特征及演化模式进行了研究。八道湾组储层普遍发育粒内溶孔和粒间溶孔为主的溶蚀型次生孔隙,有效改善和提高了储层质量;储层垂向上以4 100m和4 500m为界,从浅至深划分为原生孔隙带、混合孔隙带和次生孔隙带,八道湾组储层为混合孔隙带和次生孔隙带;储层孔隙经历了由原生孔隙到混合孔隙再到次生孔隙的演化过程,八道湾组深部储层以发育次生孔隙带为主要特征。
The reservoir of the Badaowan Formation in the Mosoowan-Mobei area of the Junggar Basin is more than 4 000 m in depth, which is a typical deep tight reservoir. Using the data of petrophysical properties, cast thin films and scanning electron microscopy (SEM), the basic reservoir characteristics and evolution patterns of the deep reservoirs in the Badaowan Formation are studied. The Badaowan Formation reservoir generally developed dissolution-type secondary pores with intragranular dissolved pores and intergranular dissolved pores, which effectively improved and enhanced the reservoir quality. The vertical distribution of reservoirs was 4 100m and 4 500m, Deeply divided into primary pore zone, mixed pore zone and secondary pore zone, and the Badaowan Formation reservoir is mixed pore zone and secondary pore zone. The reservoir pores experienced the evolution from primary pores to mixed pores to secondary pores In the deep reservoirs of the Badaowan Formation, secondary porosity zones are the main characteristics.