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针对正72井区开始出现井组水窜、油井水淹、含水上升速度快等问题,应用岩石薄片、扫描电镜、粒度分析等方法,对研究区延长组长3、长4+5、长6储层的地层划分对比、储层沉积特征、物性特征、非均质性特征等进行了研究。结果表明:研究区长33、长61、长62、长63储层较发育,以灰色细粒长石砂岩为主;长3储层为低孔、低渗储层,长4+5与长6储层属中孔、中低渗储层;研究区储层非均质性较强。
According to the problems of water channeling, well water flooding and fast rising water cut of well group in Zheng 72 well area, the authors used thin sections of rock, scanning electron microscope, particle size analysis and other methods to study the effects of long zone length 3, length 4 + 5, length 6 Reservoir stratigraphic division, reservoir sedimentary characteristics, physical characteristics, heterogeneity characteristics were studied. The results show that the reservoirs 33, 61, 62 and 63 are well developed, mainly composed of fine grained feldspar sandstone. The Chang 3 reservoir is a low-porosity and low-permeability reservoir with a length of 4 + 5 and a long 6 reservoirs are medium-porosity and medium-low permeability reservoirs; reservoir heterogeneity is strong in the study area.