延川南工区小断层识别技术研究及应用

Research and application of minor fault identification technology in Yan chuannan project

本文针对延川南煤层气田密井网条件下,构造描述精度要求高、地震识别小断层精度低、识别井间断层难等问题,利用大量井信息及地震信息,开展井震结合研究断层技术,以地震解释断层为基础,结合相干体、蚂蚁体、倾角属性等技术手段进行断点的空间归位、断层的空间组合及断层产状落实,结果表明构造描述精度大大提高,断层条数增多,断层走向和倾向描述更加可信。形成了基于三维可视化的井震匹配断层解释技术,深化了煤层气田构造特征认识。

The CBM field in Yan chuannan has entered the stage of development with high density wells. But some difficulties still remained, such as minor fault cannot be subtly depicted by traditional ways on seismic sections,micro-relief structures between wells cannot be characterized. According to the actual data, multiple methods are adopted such as coherent along layer ant-tracking method and inclination property to identify minor fault. Micro-relief structures between wells could be reflected by inclination properties and anttracking attribute jointing wells inlbrmation can identity subtle fault features. Application of these multi-methods can identify minor fault and micro-structures.