摘要
麦南构造T_1j_2~2段岩性为石灰岩、白云岩,岩性及厚度分布稳定,顶、底部有稳定的封隔层;储集岩的孔隙类型以孔隙型为主,裂缝型次之,充填缝发育,裂缝产状多样化,裂缝有效性较差;岩石物性为低孔低渗致密岩石,储层总体不发育,储层以Ⅲ类差储层为主,层数多,厚度小;构造高点及南轴发育厚度较薄的Ⅰ、Ⅱ类较好储层,分布范围小;储层对比性较差,形成规模大小不同的储集体。气井产能悬殊,酸后增产效果明显,日产气量及累产气证实储集体性质差异大,分布不均。
Mud logging,well logging and petrophysical data show that the lithology of T1j22 formation are mainly limestone and dolomite,the lithology and formation depth are stable and seal rocks,which are widely distributed above and below the formation.Reservoir is mainly composed of pores,fracture type comes second.Filled fractures are highly developed, fracture dips varies and fracture effectiveness is poor. The reservoir property is characterized by low porosity and low permeability,the reservoir is not well developed and is mainly made up of typeⅢreservoir with multiple layers and small thickness.The better typeⅠand typeⅡreservoirs are distributed in the structural crest and southern axle with the small area.The reservoir relative property is weak and different scales of reservoirs are formed.The gas well productivity varies and the acid stimulation effect is obvious,daily gas production and cumulative produced gas have proved the reservoir property differs greatly and and has an uneven distribution.
出处
《石油地质与工程》
CAS
2011年第4期84-86,8,共3页
Petroleum Geology and Engineering
关键词
致密岩石
碳酸盐岩
嘉陵江组
麦南构造
渝东
reservoir
tight sandstone
carbonate rocks
Jialingjiang formation
Mainan structure
Yudong area
