摘要
陕甘宁盆地中部马五4^1气层成岩相主要包括准同生期近地表大气淋蚀次生孔隙相、成岩期浅埋次生孔隙相、表生期岩溶次生孔隙相、再埋藏早期次生孔隙相，再埋藏晚期次生孔隙相和复合型次孔隙相，不同类型成岩相的沉积学标志，地球化学特征，空间分布，演化序列和发育的控制因素不同，对气藏的最终形成所起的作用亦不同，其中，准同生期大气淋蚀次生孔隙相及成岩期浅埋次生孔隙相是形成气藏的基础，复合型次生孔隙相和表生期岩溶次生孔隙相是气藏的关键，再埋藏早期和晚期次生孔隙相是形成气藏的必要条件，诸类型成岩相的叠加和改造部位通常是气藏发育的是有利地区。
The diagenetic phases of M5 1 4 gas bearing stratum in the central Ordos Basin include the near surface,atmosphere leached,penecontemporaneous secondary pore,shallow diagenetic secondary pore,karstic epidiagenetic secondary pore,early reburial pore,late reburial pore and complex secondary pore.Different phases have different sedimental fabrics,geochemical characters,spacial distributions,evolution successions,and controlling factors,which have different extent of influence on the final formation of the gas reservoir.The near surface,atmosphere learched,penecontemporaneous secondary pore and the shallo diagenetic secondary pore phases are basis for the formation of gas reservoir,while the complex secondary and the karstic epidiagenetic secondary pore phases are critical,and the early and late reburial pore phases are necessary for the reservoir formation.The overlapping and reformation areas of these phases are usually prospective gas accumulated regions.
出处
《中国海上油气（地质）》
CAS
2000年第1期37-42,共6页
China Offshore Oil and Gas(Geology)
