鄂尔多斯盆地华庆地区延长组长4+5致密油层成岩作用及成岩相
郑庆华1,2, 柳益群1,*

The Diagenesis and Diagenetic Lithofacies of Tight Reservoir of Chang4+5 Member of Yanchang Formation in Huaqing Area, Ordos Basin
Zheng Qinghua1,2, Liu Yiqun1
显微镜下的华庆地区长4+5砂岩照片 （a）碎屑颗粒周围绿泥石膜发育, B233井, 长4+5 1 , 1 931.95 m;（b）碎屑颗粒间沥青质普遍发育, 颗粒间线─点接触, B195井, 长4+5 1 , 1 856.55 m;（c）叶片状绿泥石垂直于碎屑表面生长形成绿泥石膜, 石英自生加大不发育, B413井, 长4+5 1 , 2 020.80 m;（d）黑云母绿泥石化, B168井, 长4+5 1 , 1 928.74 m;（e）厚层绿泥石薄堵塞孔隙, B233井, 长4+5 1 , 1 925.04 m;（f）颗粒表面丝缕状伊利石和粒间卷片状伊利石, B124井, 长4+5 1 , 1 944.81 m;（g）粒间孔中似蜂窝状伊蒙混层, B206井, 长4+5 1 , 1 843.86 m;（h）叶片状绿泥石垂直于碎屑表面生长形成绿泥石膜, 铁方解石胶结不发育, B213井, 长4+5 1 , 2 019.50 m;（i）铁方解石充填溶蚀孔和粒间孔, 少量铁白云石交代石英、长石、碎屑、铁方解石, B259井, 长4+5 2 , 2 042.10 m;（j）阴极发光薄片下石英发蓝紫色光, 斜长石发暗蓝色、黄绿色光, 钾长石发亮蓝色, 铁方解石等碳酸盐胶结物发暗橙黄色光, W221井, 长4+5 1 , 1 894.05 m;（k）长石完全溶蚀残余绿泥石膜形成的铸模孔, 其内充填少量自生石英颗粒, B413井, 长4+5 1 , 2 000.64 m;（l）高岭石充填溶蚀孔或附近的粒间孔隙中, B279井, 长4+5 1 , 1 699.58 m;（m）假六方板状集合体的自生高岭石, B124井, 长4+5 2 , 1 963.43 m;（n）长石溶蚀形成大孔隙, B196井, 长4+5 1 , 1 716.34 m;（o）长石沿解理方向溶蚀, B413井, 长4+5 1 , 2 006.50 m;（p）碎屑颗粒内裂缝中充填伊利石, B195井, 长4+5 1 , 1 854.50 m
Microscope photographs of Chang 4+5 sandstone in Huaqing area （a）Chlorite film is around clastic particles, Well B233, Chang 4+5 1 , 1 931.95 m; （b）The asphalt widely develops between clastic particles which line or point contact, Well B195, Chang 4+5 1 , 1856.55 m; （c）The lamellar chlorites vertically grow on the surface of clastic particles and develop to the chlorite membrane, and quartz overgrowth is not developed, Well B413, Chang 4+5 1 , 2 020.80 m; （d）The chloritization of biotite, Well B168, Chang 4+5 1 , 1 928.74 m; （e）Thick layer of chlorite blocks pore, Well B233, Chang 4+5 1 , 1 925.04 m; （f）Silk thread illite grows on particle surface and the flaky illite grows in the intergranular pore, Well B124, Chang 4+5 1 , 1 944.81 m; （g）Honeycomb structure illite smectite mixed layer clay is in the intergranular pore, Well B206, Chang 4+5 1 , 1 843.86 m; （h）The lamellar chlorites vertically grow on the surface of clastic particles and develop the chlorite membrane, and ferrocalcite cementation is not developed, Well B213, Chang 4+5 1 , 2 019.50 m; （i）Ferrocalcite fills dissolution and intergranular pore, and a small amount of quartz, feldspar, clastic constituents, ferrocalcite are distributed by ankerite, Well B259, Chang 4+5 2 , 2 042.10 m; （j）Quartz glows blue purple light, plagioclase glows dark blue, yellow green light, potassium feldspar glows bright blue, carbonate cementferrocalcite, etc glows dark orange light in the cathodoluminescence thin section, Well W221, Chang 4+5 1 , 1 894.05 m;（k）The completely dissolution of feldspar remains chlorite membran and its mold pore with a small amount of quartz grain, Well B413, Chang 4+5 1 , 2000.64 m;（l）Kaolinite fills dissolution pore and its nearby intergranular pore, Well B279, Chang 4+5 1 , 1 699.58 m;（m）The aggregation of authigenic kaolinite presents false six party plate, Well B124, Chang 4+5 2 , 1 963.43 m;（n）The large pore space are formed from feldspar dissolution, Well B196, Chang 4+5 1 , 1 716.34 m;（o）The feldspar dissolution is along the direction of cleavage, Well B413, Chang 4+5 1 , 2 006.50 m;（p）The illite is filled intragranular fracture of clastic particles, Well B195, Chang 4+5 1 , 1 854.50 m