摘要
M地区须二段砂岩相对致密,孔隙度低,优质储层往往发育裂缝,裂缝对井上的产能具有重要影响。对于致密砂岩储层所采用的预测技术方法较多,但叠后技术方法所预测的精度相对较低。本次研究拟利用流体及裂缝检测相关技术方法,选用交会分析、P波各向异性检测技术对须二段致密砂岩储层进行富气程度及裂缝预测,研究成果表明方位P波各向异性检测技术能很好地预测高角度裂缝发育的位置及强度,采用交会法对砂岩储层进行解释,将储层相对富气程度划分为五类,认识到该区局部区域裂缝发育与富气储层相关性较差,而有的区域则结合得较好。两种技术方法所得的异常叠合区域可望钻获高产工业气流,反演预测结果与该区现有钻井资料结果对比吻合度较高,值得在致密砂岩储层预测中推广。
There are many prediction techniques for tight sandstone reservoirs, among which the poststack technique has a relatively lower accuracy. In this paper, we applied fluid ＆ fracture detecting technique, intersection method and P-wave azimuthal anisotropy to predict fractures and gas-rich level. The results showed that P-wave azimuthal anisotropy was an effective method to predict positions and densities of high angle fractures, and the intersection method could be used to divide the type of reservoirs. The abnormal superposition area from these two methods suggested high production of industrial gas. Due to the highly correspondence of inversion results and drill data, the methods were worth to be promoted.
出处
《中国西部科技》
2015年第11期26-31,共6页
Science and Technology of West China
