Question: Whose address of operation was the EchiraX Concession? 
SQL: SELECT "Client" FROM "1-13150274-1" WHERE "Area of Operation" = 'EchiraX Concession';

Question: When was the operation in Field 103 executed? 
SQL: SELECT "Years of Operation" FROM "1-13150274-1" WHERE "Area of Operation" = 'Field 103';

Question: In what country is the El Hamada area of operation? 
SQL: SELECT "Country" FROM "1-13150274-1" WHERE "Area of Operation" = 'El Hamada';