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钙质夹层是陆相储层的重要夹层之一,它增强了储层非均质性阻碍了流体流动,加大了油气开发难度,但又由于夹层的隔挡使得在油田开发后期仍有大量剩余油分布,当地层水淹后,由于钙质夹层的存在,会使该地区水淹情况变得极其复杂,造成了水淹层解释的难度。永乐油田储层中含有较多的钙质夹层和薄夹层,对测井曲线的影响较大,造成了储层关键测井曲线的失真,水淹后测井解释极其困难。针对油田储层特点,总结了钙质夹层对储层的影响原因,理论上分析了永乐地区钙质夹层的测井曲线特征,定量上分析了其对水淹层解释的影响,形成了一套行之有效的处理办法。经油田实际应用效果明显。
Calcareous interbeds are one of the important intercalated layers of terrestrial reservoirs. They enhance reservoir heterogeneity and impede the fluid flow, which increases the difficulty of oil and gas development. However, due to the interbedded barrier, there are still a large number of interbeds in the late stage of oilfield development Remaining oil distribution. After the flooding of the formation water, the flooding situation in this area becomes extremely complicated due to the presence of calcareous interbed, which makes it difficult to interpret the flooded layer. The reservoirs of Yongle Oilfield contain more calcareous interbeds and thin intercalated layers, which have a great influence on the well logging curves, resulting in the distortion of the key well logging curves. It is extremely difficult to interpret the logging data after flooding. According to the characteristics of oil reservoirs, the paper summarizes the causes of the influence of calcareous interbedded reservoirs on the reservoirs, theoretically analyzes the logging curve characteristics of calcareous intercalations in Yongle area, and quantitatively analyzes its influence on the interpretation of the flooded layers, forming a set of Effective treatment. After the actual application of the oilfield effect is obvious.