碳酸盐岩缝洞体横向最小可分辨距离定量分析  

Quantitative Analysis on Minimum Lateral Resolution Range of Fracture-Cave Bodies in Carbonate Rocks

作　　者：李凡异 狄帮让[2] 魏建新[2] 徐建永 武爱俊 印斌浩 

机构地区：[1]中海油研究总院,北京100028 [2]中国石油大学油气资源与探测国家重点实验室,北京102249

出　　处：《新疆石油地质》2016年第3期307-310,共4页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011ZX05007-006)

摘　　要：定量分析缝洞体横向最小可分辨距离是碳酸盐岩缝洞型油气藏勘探开发过程中的一个实际问题。利用双聚焦理论推导出空间子波函数,分别依据瑞雷准则和雷克准则,在理论层面上分析了横向最小可分辨距离,认为点散射体横向最小可分辨距离可近似认为是空间子波主瓣宽度的1/2,其数值与地震波波长呈正比,与最大出射角的正弦值呈反比。从实际应用的角度,开展了地震物理正演模拟研究,为实际生产提供了缝洞体横向最小可分辨距离的精度依据。Quantitative analysis on fracture-cave bodies＇ lateral minimum resolution range is a practical problem for the prospecting anddevelopment of fracture-cave carbonate reservoirs.This paper derives a spatial wavelet function using the double-focusing theory,analyzesthe minimum lateral resolution range based on criteria of Rayleigh and Rickers theoretically.It is considered that the minimum lateral reso-lution range of point scatterer could be 1/2 of the main lobe width of the spatial wavelets approximately,whose value is proportional to seis-mic wave length and shows an inverse correlation with the sine value of the maximum emergence angle.Seismic forward modeling is per-formed from the perspective of practical application,which provides a precision basis of the minimum lateral resolution range of fracture-cave bodies for actual production.

关 键 词：碳酸盐岩缝洞体 横向最小可分辨距离 空间子波函数 地震物理正演模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]