Study and Application of Multilayer Well Pattern Reconstruction in Large-span Reservoirs with Complex Fault Blocks——Taking the L477 Well Area as an Example
To solve the problem of uneven interlayer water driving and unbalance of injection-production system in complex fault block large-span reservoir,taking the L477 well area as an example,reservoir engineering and numerical simulation methods are used to establish the stratified subdivision evaluation method with the economic limit of reserves abundance and permeability level difference as the main indexes,and the well pattern optimization design with the flow line as the target on the plane.The vector injection-production system adjustment model is formed by subdividing two sets of stratified reconstructed well pattern in the area of high reserve abundance and reducing well spacing by split-zone waterflooding in the area of low abundance.The scheme deployed 20 internal adjustment Wells,and the numerical simulation predicted that the ultimate recovery rate could be increased by 5.3 percentage points.The research results have a strong guiding role and reference significance for the balanced water drive technology of large-span reservoirs with complex fault blocks.
large span reservoir with complex fault blocksdevelopment contradictiontechnical and economic boundaryhierarchical subdivisionreconstruct the water drive pattern
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