论文部分内容阅读
据美国石油地质学家协会1999年年会报道,中东油田在打水平井过程中,常发现井下存在高产量的裂缝发育带,它们有的是裂缝群,有的则是断层带。露头研究表明,这些裂缝带面积大、厚度薄(仅几米)、呈平面状。如果裂缝处于开启状态,裂缝带就是重要的通道,可以具有以下作用:①沟通不同的产油层,从而增加可采储量;②沟通产油层和水前缘,从而产生早期水窜。由此可见,裂缝带可改变油藏中流体的正常流动方式,因此,必须在油藏描述中予以考虑。然而常规的三维地震测量通常不能检测裂缝带,只有以离散模型为基础的新技术才能获得裂缝群的真实合成图像。
According to the 1999 annual meeting of the American Petroleum Geologists Association, during the horizontal well drilling in the Middle East, it is often found that there are high-yield fracture zones in the well. Some of them are fracture groups, while others are fault zones. Outcrop studies have shown that these cracks with a large area, thin (only a few meters), was planar. If the fracture is open, the fracture zone is an important channel, which can have the following functions: ① communicate different oil-bearing formations to increase the recoverable reserves; ② communicate the oil-producing layer and the water front to produce early water channeling. It can be seen that the fractured zone can change the normal fluid flow in the reservoir and therefore must be considered in the reservoir description. However, conventional 3D seismic surveys usually can not detect the fracture zone, and only the new technique based on the discrete model can obtain the real synthetic image of the fracture group.