江37-江372井井间地震技术应用效果分析

Analysis on application effect of interwell seismic technique in Well Jiang 37-Jiang 372

井间地震技术是油气田勘探开发中一项新技术,是将震源系统和接收系统分别放入井中,在目的层进行地震波的激发和接收,通过记录波的旅行时、振幅和频率等参数,利用其资料高信噪比、高分辨率的特点,结合测井或地面地震资料进行解释,以了解井间地下构造特征和储层岩性变化。该文针对江37-江372井井间含油砂体不连通情况,应用井间地震技术,采集了江37-江372井的井间地震资料,进行了速度层析成像和反射波成像处理,反演出了波阻抗剖面、孔隙度剖面和渗透率剖面,通过分析解释,确定了井间地下构造特征和储层岩性变化,验证了井间地震技术解决井间储层细节描述方面的能力。

In exploration and development of oil and gas fields, interwell seismic is a new technique. It is to shoot and receive seismic waves at the target layer, through putting seismic source system and receiving system into the hole respectively. Based on interwell seismic data which are characterized by high A/N ratio and high resolution and interpretation combined with well logging data or surface seismic data, the technique is applied to find out the features of interwell subsurface structures and lithological changes of reservoirs through recording parameters of the waves, i. e. travel time, amplitude and frequency. In this paper, interwell seismic data of Well Jiangg 37 - Jiang 372 are collected by using interwell seismic technique, focused on non-interconnection of interwell oil-bearing sandbodies in Well Jiangg 37 - Jiang 372. Velocity tomographic processing and reflected wave imaging processing are performed, and wave impedance section, porosity section and permeability section are inverted. Based on analysis and interpretation, the features of interwell subsurface structures and lighological changes of reservoirs are confirmed, which verify the capability of interwell seismic techniquein solving detailed description for interwell reservoirs.