The Practice and Result of Margin Water Plugging in Heavy Oil Reservoir

Taking tritium and ³⁵S as the tracer, the inspecting result shows that the margin water intrude continually from outside plumb to contour. The speed in midst is quicker than in two sides. After indoor test and optimizing plugging substance com posing and construction parameter, it has active affection to stave the margin water to plug with super-thin cement and dusty coal ash in heavy oil reservoir. Margin water plugging also can increase production. But it can't stop the margin water.