Drilling technique practice and recogonition of Gabon G4-188 Block

The G4-188 block is a new overseas exploration area.In the course of drilling,many problems occurred such as well falling down,gas invasion,and difficulty to control well deviation,and affected drilling speed.In this paper,kinds of technical measures and methods to resolve the drilling operation difficulties were introduced which provided useful technical support for the following operation of G4-188 block.