基于地震资料的小断裂检测技术

煤矿安全生产的形势越来越严峻,查明煤层的构造发育情况,特别是小断层及微断裂的发育情况,是目前煤炭工业迫待解决的一大难题。根据煤田中小断层和断面波的特征,有针对性的提出了小断层高分辨率时频谱处理识别技术和基于断面波特征的微断裂识别方法,模型试验和实际地震资料的应用表明,该方法能够充分挖掘地震资料的有效信息,较好的识别出煤田中的小断层和微断裂。

奥陶系碳酸盐岩缝洞刻画浅析—以塔河十区西为例

为提高塔河油田采收率,深化开发单元储层参数预测及连通性认识,开展奥陶系碳酸盐岩缝洞刻画技术研究。目前缝洞目标刻画常用技术方法有张量,高频强反射分离,反演,分频,AFE,Aberrancy。区域断裂识别常采用频谱分解不连续性检测,曲波多尺度,蚂蚁体。目标刻画技术由前期的异常体轮廓刻画发展到现在内部结构及定量刻画,钻井放空漏失率由30%提高到58%。

Comparative analysis of fracture identification methods based on gravity anomaly in Heilongjiang

The identification of fractures is of great importance in gravity and magnetic data processing and interpretation.In this study,four fracture identification methods are applied,and widely used in processing and analysis of the gravity anomaly,including vertical second derivative method,tilt derivative method,theta map method and normalized differential method,for gravity data acquired in a given area in Heilongjiang.By comparing the distribution of the zero contour or maximum contour,we summarize the application effects,and both advantages and disadvantages of each method.It is found that tilt derivative method and normalized differential method provide better effects than other two methods:the narrower anomaly gradient belt and higher identification precision of fracture or geological boundary.The inferred fractures and geological boundaries have a great match with the results obtained from geologic map and remote sensing data interpretation.Those study results have definitely provided the theoretical foundation for identifying faults and the geological boundaries.