EOR Research In Horizontal Well On Unconsolidated Sand Conventional Heavy Oil Reservoir With Big Bottom Water

Compared with imperfect vertical Well, the horizontal well has large contact area with reservoir In the development of bottom water reservoir, tapping the potential between the top and cone remaining oil, enhanced oil recovery and other areas showed a large advantage Theory and the field practice shows that, compared with imperfect vertical well the horizontal well has high production capacity, high critical yield and long time of bottom water breakthrough.Ng2of Lin2Block is a typical reservoir with big bottom water.At present it is in production tail with high water cut and high-recovery and high degree of reserves produce.The Bottom water coning is serious.Inclined by direct comparison with the effect of horizontal wells, horizontal wells with production time of less than a vertical well has more oil recovery.Based on analysis of waterlogged characteristics and oil residual distribution,according to well pattern of Ng2of Lin2Block at the monment,we can know that the remaining oil is enriched in well space beyond150meters where the bottom water can’t coning or cresting.We can deploy some new wells to increase control of geological reserves.In view of the above problems,to tap the rich residual oil on the top of bottom reservoir, this paper carried a fine reservoir study about in-layer heterogeneity by subdividing rhythmic layering.Based on above,3D fine geologic modeling was performed.The interlayer is also considered to be reservoir to identify its function.By analyzing development history,we got a comprehensive evaluation about Ng2of Lin2Block from the movement disciplinarian of oil and water, production performance and recovery etc. Reservoir simulation is conducted and residual oil distribution was characterized Based on such analysis,put forward the intermittent production Wells turns away and realize the dynamic cone, reduce moisture content, improving yield and recovery ideas we can optimize the horizontal wells adjustment schemeof reservoir with bottom water for improving production.