碳酸盐岩储层缝洞的预测方法与应用

FRACTURE AND CAVITY PREDICTION METHOD IN CARBONATE RESERVOIRS AND ITS APPLICATION

为了更好地预测北非S油气田上白垩统Abiod组碳酸盐岩储层的缝洞分布情况,结合已有的钻井资料,综合运用FTEC和Ant-tracking技术对该区的缝洞及断裂体系进行了预测。研究表明,构造破裂作用是S油气田储层形成和发育的主要因素,裂缝是储集层的主要渗流通道;同时得出,FTEC方法对构造起伏大、构造复杂的地区的储层缝洞预测能够取得很好的预测效果,并有效地克服了基于地震数据体的Ant-tracking断裂体系预测方法的局限性。上述两种方法的综合运用,有效地提高了碳酸盐岩储层缝洞预测的精度,为S油气田碳酸盐岩储层缝洞预测提供了新方法和新思路。

In order to better predict the fracture and cavity distribution of the carbonate reservoir in Abiod formation in Upper Cretaceous in S Oil and Gas Field, North Africa, the paper applied FTEC and Ant-Tracking techniques to predict the cavity and fracturing systems in this area in combination with the drilling data. The study results indicate that the structure fracturing role is the main factor controlling the reservoir forming and developing in S Oil and Gas Field, and the fracture is the main permeating and flowing channel in the reservoir; it is also shown that FTEC method can effectively predict the fracture and cavity of the reservoir in the areas where the structure is fluctuant and complicated, and can effectively overcome the limitation of the volume-based Ant-Tracking fracturing system prediction method. The joint application of the two methods effectively improved the prediction precision of the fracture and cavity in the carbonate reservoir, which provided a new method and an idea for the fracture and cavity prediction in the carbonate reservoir in S Oil and Gas Field.