摘要
致密砂岩储层孔隙度、渗透率低,地震反射信号弱,而常规蚂蚁追踪技术对薄层进行裂缝识别能力较弱。为压制地震数据中的噪声干扰,提高蚂蚁追踪技术对裂缝的识别精度,利用分频蚂蚁追踪技术对致密砂岩储层裂缝检测进行研究。该技术借助谱分解对地震数据分频处理,提取单频蚂蚁体分析融合解释,完成对致密砂岩储层的裂缝描述。利用分频蚂蚁追踪技术对四川盆地BL地区致密砂岩储层进行裂缝检测,结果表明,该方法在致密砂岩储层中能够有效描述裂缝构造,较之常规蚂蚁追踪技术,对裂缝的识别分辨率有所提高,反映的裂缝信息更为精确。
The porosity and permeability of the tight sandstone reservoir are low, and have the weak seismic reflection signals, the conventional ant tracking technology has a weak ability to identify the fracture of the thin layer. In order to suppress the noises in seismic data and improve the identification accuracy of the ant tracking technology, the fractures of the tight sandstone reservoir are detected by the frequency division ant tracking technology. In this method, the seismic data are processed by frequency spectrum decomposition first, and then the single frequency ant body is extracted and analyzed to describe the fracture of the tight sandstone reservoir. The fractures of the tight sandstone reservoir are detected by the frequency division ant tracking technology in the BL area of Sichuan Basin, the results show that the fracture structure of the tight sandstone reservoir could be effectively described by this method, compared with the conventional ant tracking technology, the resolution has been improved for the fracture identification, and the reflected information of the fracture is more accurate.
出处
《油气地球物理》
2017年第4期32-35,共4页
Petroleum Geophysics
关键词
谱分解技术
分频蚂蚁追踪
裂缝检测
致密砂岩
四川盆地
spectral decomposition, frequency division ant tracking, fracture detection, tight sandstone and Sichuan Basin
