摘要
通过模型数据分析了声反射成像测井中声波反射波CMP(Common Middle Point)道集的特点,重点研究了声反射成像测井中声波反射波的高分辨率叠加技术。研究发现,动校正过程中,动校拉伸仅出现在大偏移距的数据道处,因此在动校正环节中基本不考虑动校拉伸的影响;分析了不同的速度对动校正及叠加效果的影响,发现速度是叠加过程中导致叠加同相轴非同相的重要因素;采用声波全波列测井中的STC(Statistical Velocity Analysis)速度分析方法,建立合适的动校正模型及变权垂直叠加技术消除了这些影响因素,保证了叠加的分辨率。对模型数据和实际测量数据进行了处理,取得了较好的效果。
Based on analysing the theoretical modeling data of acoustic reflection characteristics ot CMP（Common Middle Point） gathers, and focused on is the high-resolution stacking techniques for the acoustic reflected wave data processing. These analyses show that during NMO（Normal Moveout）operation, the dynamic stretching is only significant for the data with large offset and therefore it needs not to be consided in acoustic reflection logging. On the other hand, analyzed are affect of different velocities on NMO and the stacking effect, the results from which show that velocity is key factor to inphase axes non-phase during stacking. At last, used is the STC method for determining vertical velocity in full wave acoustic logging, and established are the suitable NMO model and vertical stacking technology with variable weight to ensure a higher resolution of the stacking. Applications of this method to the numerical modeling data and the field data show satisfactory results.
出处
《测井技术》
CAS
CSCD
北大核心
2011年第1期20-24,共5页
Well Logging Technology
基金
国家自然科学基金项目(50674098)
国家863项目(2006AA06Z213)
国家973基础研究项目(2007CB209601)资助
关键词
声反射成像测井
动校正
高分辨率叠加技术
速度分析法
垂直叠加
acoustic reflection imaging logging, NMO（normal moveout）, high resolution stac king technique, velocity analysis method, vertical stacking
