【摘要】 在多个区块的测井评价工作发现,孔隙结构直接影响储集层的品质和油气层的电阻率,是测井准确评价流体性质的关键。岩石物理资料表明不同区块内影响储层孔隙结构的因素不同,但效果是一致的,即孔隙结构的复杂程度控制着储层的储集能力和渗透能力。孔隙结构的复杂程度影响了储层中导电流体的分布和含量,从而控制了储层的电阻率。储层出现低阻油气层的内因均为复杂的孔隙结构(骨架导电及工程原因除外)。测井储层评价在分析控制储层孔隙结构复杂程度的地质因素及储层分类的基础上,针对不同类型储层采用不同的模型、参数和标准,可以有效的认识储层品质和识别不同类型储层的流体性质。更多还原

【Abstract】 The reservoir pore structure controls the reservoir quality and resistivity response of hydrocarbon-bearing zones and thus, critically affects logging interpretation. We use petrophysical data in three types of reservoir with different pore structure characteristics to show that the complexity of pore structure had a significant effect on the effective porosity and permeability regardless of geological factors responsible for the formation of pore structure. Moreover,, the distribution and content of conductive fluids in the reservoir varies dramatically owing to pore structure differences, which also induces resistivity variations in reservoir rocks. Hence, the origin of low-resistivity hydrocarbon-bearing zones, except for those with conductive matrix and mud filtrate invasion, is attributed to the complexity of the pore structures. Consequently, reservoir-specific evaluation models, parameters, and criteria should be chosen for resistivity log interpretation to make a reliable evaluation of reservoir quality and fluids.更多还原