【摘要】 南阳凹陷泥岩裂缝油气藏具有以下特征:(1)储层泥岩为暗色、厚层、富含有机质的生油岩;(2)具有异常高孔隙流体压力;(3)测井曲线表现为高电阻率、低声波速度、高自然伽马值,地层倾角图倾向杂乱;(4)主要分布于深凹陷区内鼻状构造高点、翼部和倾没端地层陡倾处、挠曲带及断裂带附近。泥岩裂缝性储集层的形成主要与异常高孔隙流体压力、局部构造变形及断裂作用有关,它被非裂缝性泥岩所封闭,形成自生自储的泥岩裂缝油气藏。更多还原

【Abstract】 According to the data of drilling, logging, seismic exploration and laboratory analysis, fractured reservoirs in mudstone in Nanyang depression have some characteristics: (1) Some fractuted reservoirs have become commercial oil pools; (2) Mudstones are usually dark, thick sourse rocks with rich carbonate and organic matter; (3) Mudstone has abnormally high pore-fluid pressure; (4) Fractured reservoirs in mudstone have high resistivity, low accoustic velocity, high gamma-ray radioactivity and disordered tendencies on the dip-log diagram; (5) Fractured reservoirs occured usually on the top, flank and he plunge part of a nose, as well as on structure flexture and fault zones. The formation of fractured reservoirs in mudstone is controlled by: (1) Rich carbonate in mudstone. It makes fractures in mudstone easy; (2) Abnormally high pore-fluid pressure. It changes the physical properties and structural behaviors of rocks and stimulates rock to fracture; (3) Deformation and faulting of structures. They provide the stress field circumstances for fracturing.更多还原