Samaraneftegas: Hydrogel Based Mud in Direction and Horizontal Wells
The deposits of the Volga-Ural basin and, in particular, the Samara Region are mainly represented by anhydrites, greenish-gray and brown siltstone, and marl. The interlaying shale deposits become unstable and disintegrate when exposed to the drilling mud. Intense disintegration gives rise to a number of drilling problems. When drilling directional …