DETERMINATION OF WATER AND OIL CONTACT ANGLES IN 3 DIMENSION ROCKS BASED ON MICRO-CT SCAN IMAGES

• Main Author: Sujono, Bernard
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/83605
• Institution: Institut Teknologi Bandung

Crude oil is a mixture of hydrocarbons formed from plant and animal remains. Crude oil in the form of heavy oil trapped in rock pores is difficult to mine and observe. This research involves applications in the industrial sector, namely Enhanced Oil Recovery. One of the parameters for identifying fluids in rock pores is the contact angle. Although it has been widely studied, the effect of fluids on rock pores has not been fully discussed regarding contact angles in a 3D perspective. This study aims to measure the fluid contact angle in rock pores of 3D view using micro-CT. In addition, the influence of rock pore width, rock surface shape, wettability and fluid surface tension will be observed. The research was conducted experimentally by dripping water mixed with KI and oil into a sample container in the form of a straw. Fluids at steady state condition in rock pores are imaged using micro-CT. The image scan results will be reconstructed using NRecon software to obtain 3D images. Next, the 3D image will be observed in CTvox software to obtain the contact angle and fluid behavior in the rock pores. The contact angle was measured using ImageJ software at an observation angle of (0-315)° for each slice image. Experimental results revealed that water wets all the pores of the rock while oil tends to form lumps on the rock surface. Surface tension also affects the value of the contact angle. The greater the surface tension of the fluid, the smaller the resulting contact angle value and vice versa.