基于蚂蚁算法的断裂追踪技术在乌夏地区的应用

Application of fault tracking technology based on ant colony algorithm in Wuxia Area

断裂解释是地震资料解释的重要内容,解释的可靠性对储层研究有很大影响。在乌夏地区地震资料进行预处理并综合应用相干体、方差体等技术手段检测地震反射不连续性的基础上,应用蚂蚁追踪技术进行断裂系统解释,对蚂蚁追踪属性体提取过程中涉及的6个参数的合理取值进行对照试验,并用地震、岩心、成像测井等资料对试验结果进行多次验证。文中利用构造平滑、方差计算增强断裂边界,通过参数试验,确定属性提取最优参数组合,并由产状控制滤除低角度层位痕迹,进而生成蚂蚁追踪属性体;对属性体提取积分厚度,预测平面裂缝发育情况,通过碎片拾取,确定裂缝大致方位及角度,以加深对乌夏地区二叠系风城组断裂系统的认识。应用分析表明,蚂蚁追踪的属性体断裂痕迹比相干体、方差体更为清晰,并能在平面及剖面解释上体现更多的细节。

Fault interpretation is the important content of seismic data interpretation.The reliability of interpretation has great influence on reservoir research.On the basis of the pre-processing of seismic data and the integrated application of multiple seismic attribute technology such as the variance and coherence technique to detect reflection discontinuities in the seismic data,the ant tracking technology was applied in the fault interpretation in Wuxia Area.This paper tested the six parameters related to the process of ant-track extraction and examined the results with the data of seismic,rock cores and FMI.The favorable areas of fractures were identified by structure smoothing and variance calculating.The tests of ant-tracking parameters determined the attribute extraction and the optimal parameter combination.Attitute controlled strata trace and filtered out low angle trace,thus generating ant tracking attributes.By the attribute extraction and the thickness of the integral body,the plane fracture development situation was prdicted.Through the picking up of fragments,roughly the azimuth and angle of fracture were determined in order to deepen the understanding on the Permian Fengcheng Formation fracture system in Wuxia Area.Analysis shows that the fracture trace of ant tracking attribute is more clear than that of coherent and variance,and can reflect more details on the plane and profile interpretation.