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Petrel坐标系统设置之前要先了解三个概念：

1）大地坐标，设置椭球参数

2）投影坐标，设置投影参数

3）基准转换，设置不同椭球转换三参数

系统没有CGCS2000到WGS84的基准转换，我们增加CGCS2000至WGS84的基准转换

先找到CGCS2000的椭球和WGS84椭球

然后利用WKT文件新建基准转换

先拷贝一个WKT，比如ITRF_2000_To_WGS_1984

GEOGTRAN["ITRF_2000_To_WGS_1984",GEOGCS["GCS_ITRF_2000",DATUM["D_ITRF_2000",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],METHOD["Geocentric_Translation"],PARAMETER["X_Axis_Translation",0.0],PARAMETER["Y_Axis_Translation",0.0],PARAMETER["Z_Axis_Translation",0.0],AUTHORITY["Esri",108280]]

改成CGCS_2000_To_WGS_1984

GEOGTRAN["CGCS_2000_To_WGS_1984",GEOGCS["GCS_China_Geodetic_Coordinate_System_2000",DATUM["D_China_2000",SPHEROID["CGCS2000",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],METHOD["Geocentric_Translation"],PARAMETER["X_Axis_Translation",0.0],PARAMETER["Y_Axis_Translation",0.0],PARAMETER["Z_Axis_Translation",0.0],AUTHORITY["Petrel",78280]]

X_Axis_Translation，Y_Axis_Translation，Z_Axis_Translation即是基准转换三参数

4）建立Petrel项目所能识别（搜索）的坐标系统

5）新建Petrel项目，选择GS120E坐标系统

参考文献

https://zhuanlan.zhihu.com/p/408020299