Phản ánh ion seismo logy là Một phương pháp từ xa Ging ima Được sử dụng trong tion explora của dầu Leum . Các reflectio Không có phương pháp địa chấn phát oped trong WS 920S 1. Ban đầu, các nguồn mà WS đã Năng động, điểm kinh nghiệm ite losion đặt ra trong một lỗ thấp shal dri lled vào mặt đất, và nhận được Iver WS e kế hoạch ted a geophone vào thứ Grou. Trong difficul khu vực t, một tội lỗi gle nguồn wou ld Đề cập đến năm Năng động, mảng của char ite quản lý Arou thứ centr. | 4 Construction of Seismic Images by Ray Tracing Enders A. Robinson CONTENTS Acquisition and Digital Seismic Imaging by Seismic Iterative Migration in the Case of Constant Velocity . 61 Implementation of Seismic The Ray Numerical Ray References . 72 Introduction Reflection seismology is a method of remote imaging used in the exploration of petroleum. The seismic reflection method was developed in the 1920s. Initially the source was a dynamite explosion set off in a shallow hole drilled into the ground and the receiver was a geophone planted on the ground. In difficult areas a single source would refer to an array of dynamite charges around a central point called the source point and a receiver would refer to an array of geophones around a central point called the receiver point. The received waves were recorded on a photographic paper on a drum. The developed paper was the seismic record or seismogram. Each receiver accounted for a single wiggly line on the record which is called a seismic trace or simply a trace. In other words a seismic trace is a signal or time series received at a specific receiver location from a specific source location. The recordings were taken for a time span starting at the time of the shot called time zero until about three or four seconds after the shot. In the early days a seismic crew would record about 10 or 20 seismic records per day with a dozen or two traces on each record. Figure shows a seismic record with wiggly lines as traces. Seismic crew number 23 of the Atlantic Refining Company shot the record on October 9 1952. As written on the record the traces were shot with a source that was laid out as a 36-hole circular array. The first circle in the array had a diameter of 130 feet with 6 holes each
