裂缝预测技术在松南工区应用效果分析

Application effect analysis of fracture prediction technique in Songnan prospect area

中国地质大学研究生院,武汉430074

Graduate School, China University of Geosciences, Wuhan 430074

根据理论与实验观测结果得出的P波传播速度、旅行时、反射振幅及AVO斜率随观测方位角呈余弦关系变化的规律,经过对松南实际地震资料的叠前精细处理和对速度、振幅、AVO等参数的分方位提取,预测了工区内与目的层储集性能密切相关的裂隙发育带。预测的裂隙分布情况与实际钻井产气结果一致。这验证了该项技术在本区应用于寻找有利油气富集带的有效性,也为东部类似地质情况的深层裂缝型油气藏的勘探提供了一种有效的工具。

Based on the cosine relationship between P-wave velocity, traveltime, reflection amplitude, and AVO slope obtained from theoretical and experimental observations, the fracture development zones in Songnan prospect area are detected with parameters such as velocity, amplitude, and amplitude obtained azimuthally from the seismic data with fine prestack processing in the prospect area. The resulting fracture distribution is fully coincide with gas-producing formations which are confirmed by drilling. The technique can not only be used to detect favorable hydrocarbon accumulations in the prospect area, but also provides an effective tool for detecting deep fractured hydrocarbon reservoirs in the east of China with similar geologic settings.