Abstract：The stack of converted wave requires real common conversion point (CCP) gathering. When medium is horizontally Iayered,CCP coordinates can be determined by using the analytic expression that is derived in the case of single uniform layer.However，in practical application，the analytic expression is too tediously long and causes much computation,and its parameters show indistinct influence on CCP coordinates. What is more，it is very difficult to derive such analytic expression in the case of slant interfaces.An iterative algorithm for CCP locus is derived in the case of single uniform layer. The algorithm leads to fast calculation,accurate result and rapid convergence.If the iteration result of a depth point is used as the initial value of the next point,a single iteration usually makes the relative error much smaller than 0. 1%.This algorithm is seven times faster than the original one. This algorithm is expressed by a concise formula ,from which people can see how velocity ratio and offset/depth ratio influence iii,P coordinates. Essentially，this iterative algorithm can be easy applied to the case where reflectors slope down.
周竹生, 王卫华. 一种快速、高精度的共转换点轨迹计算方法[J]. 石油地球物理勘探, 1993, 28(1): 37-45.
ZHOU Zhu-sheng, WANG Wei-hua. A method for fast and accurately computing the common conversion point locus. OGP, 1993, 28(1): 37-45.
