The Swelling Effect of Sodium-Bentonite as an Additive in Water-Based drilling Mud with different concentration of Polyamine Inhibition Timur Akbar, Rini Setiati, Rizky Akbar
Petroleum Engineering Depertment, Universitas Trisakti, Jakarta, Indonesia
Abstract
Problem that often occurs when drilling is on progress, is when the mud is too reactive, that will cause swelling clay or too many filtration loss. Sodium-bentonite are widely used in drilling mud to give more viscosity to the mud itself and giving the mud an optimal ability to hold and lift cutting inside the borehole, with a risk of swelling appearance and too many filtration loss that may cause [1]. It contain mostly montmorillonite particles like, which is sodium that overpowered the illite content inside it [2]. Polyamine as a inhibitor to the clay can infiltrate into the c-spacing of the Bentonite, which is a a gap between two layers of bentonite structure[3]. A test has been conducted to test the effect of the polyamine inhibition inside a Water-base mud formulation x which is already inhibited with sodium-bentonite. This test are using several equipment such as; API Filtrate loss, swell meter test, retort oven and Vann vg meter with API Standard procedure. The result give a distinctive conclusion about how the rheological elements react toward the polyamine existence with different concentrations (4gr-10,5gr) inside the mud, and also the mud durability differences between room temperature and high temperature (300°F).
