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小断层是影响开发后期高含水油田剩余油挖潜和注采调整关系的主要控制因素之一,因此,油田开发后期对精确描述井间小断层的位置和走向提出了更高的要求.单纯依靠测井资料描述断层和储层特征具有一定的局限性,尤其在断点组合、井间断层延伸长度、平面位置以及井间砂体连续性等方面,还需要井震结合进一步深入研究.采用更真实融入噪音的地震正演模型分析小断层识别的可行性出发,利用三维化、多手段的断层分级识别描述集成技术,形成“先大后小、先简单到复杂、三维可视组合、井震精细甄别”的小断层精细构造解释方法,通过三维地震像素处理和地震属性处理技术,进行断层增强和放大等手段,结合井震标定精细甄别确定小断层,有效解决密井网油田复杂地质条件的断层问题.对寻找断层附近、井间砂体及过渡带外扩潜力,进一步深化高含水老油田精细油藏描述,精细剩余油挖潜具有重要意义.
The small faults are one of the main controlling factors that affect the relationship between the remaining oil tapping potential and the injection-production adjustment in the high-water-cut oilfield in the late stage of development. Therefore, the later stages of oilfield development put forward higher requirements for accurately describing the location and direction of small-well intersections. Well data describing fault and reservoir characteristics have some limitations, especially in combination of breakpoints, extension of inter-well fault length, plane position and inter-well sandbody continuity, and further study on well-seismic combination is needed. In order to analyze the feasibility of small fault identification, a seismic forward model incorporating noise is introduced to describe the integration technology by using three-dimensional and multi-level fault classification and identification to form a system of “first large, second small, simple to complex, 3D visual combination, Fine screening ”small fault fine structure interpretation method, through the three-dimensional seismic pixel processing and seismic attribute processing techniques, such as fault enhancement and amplification means, combined with fine-screen Jingdian identification of small faults to identify and effectively solve the complex geological conditions Of the fault problems. Looking for fault near the inter-well sand bodies and transitional zone expansion potential to further deepen the high water-cut old oil fields Fine reservoir description, fine remaining oil is important.