Visualisation of oil recovery by water alternating gas (WAG) injection using high pressure micromodels -water-wet system

摘要

The use of WAG (water alternating gas) injection can potentially lead to improved oil recovery compared to injection of either gas or water alone, however the physical process is not well understood. Using high pressure glass micromodels, a series of WAG tests have been conducted using equilibrated fluids, with high quality alternate WAG cycles being recorded. The tests were conducted using both water-wet and oil-wet micromodels. In this paper results of a typcial water-wet test is presented(results of the oil-wet and mixed wet tests will be presneted in a subsequent paper).