数字三分量检波器在油藏精细勘探中的应用

Application of digital three-component geophone in precise prospecting

本文在分析数字三分量检波器的工作原理及采集效果的基础上,对数字三分量检波器与常规模拟检波器在国内多个地区的应用进行了对比分析,总结指出全数字化的信号处理方式决定了数字三分量检波器与常规检波器相比具有的明显优势:①单点接收,高密度,无组合,频带宽,保真度高;②非常低的畸变,动态范围大;③极高的向量保真度;④抗干扰能力强;⑤数字检波器的线性特性可以满足高分辨率处理技术对相位的假设条件,有效解决了常规检波器反褶积后在剖面上存在剩余相位的问题;⑥三分量的同时记录能力,同样的野外工作量能获三倍向量数据,纵横波联合应用,能大大提高油气检测的可靠性,降低勘探风险。其具有高分辨率、高信噪比、高保真度的特点,适用于复杂油气藏的精细化勘探,在当今陆上油田已进入岩性、复杂隐蔽油气藏勘探阶段时,全波场、全数字化是未来野外勘探数据采集的发展方向。

Based on the working theory analysis and acquisition effect analysis of digital three-component geophone ,this paper compared the digital geophone with the conventional analog geophone in the domestic multi-regional application,concluded that all-digital signal processing mode determines the following significant advantages of digital three-component geophone:(1)Single point reception,high-density,non-combination,wide frequency bandwidth and high-fidelity,(2)Very low distortion and high dynamic range ; (3) High degree of vector fidelity; (4)Strong anti-interference ability. (5)The linearity capability meets the requirements from high-resolution processing techniques,thus it is an effective solution to the residual phase problems. (6) Three-component means three times vector datas.The application combination of vertical wave and horizontal wave has greatly enhanced the reliability of oil exploration and reduced the exploration risk. High resolution,high SNR and high fidelity characteristics make the digital three-component geophone suitable for the precise prospecting in complex areas. At present land exploration has entered into the lithology and complex exploration time,all-wave field and all-digital field exploration are the developing directions of data acquisition in the future exploration.