Well-testing interpretation model used for analyzing series structure of multiple fracture-cave units and methods
A technique of well test interpretation and fracture-vuggy type, which is applied in the field of well test interpretation model to analyze the series structure of multi-fracture-vuggy units, and can solve problems such as inconsistency, inability to reasonably explain and evaluate the composition structure of fracture-vuggy reservoirs
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[0122] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.
[0123] 1) Combine the two types of reservoirs, "fracture-cavity" and "fracture-dissolution pore" in fracture-cavity reservoirs into fracture-cavity units, which are only distinguished from the permeability parameters that characterize the flow capacity. Fracture-cavity permeability High rate and low slit-hole permeability.
[0124] 2) For carbonate fracture-cavity reservoirs with only partial spatial flow, some well test curves show radial flow characteristics. For this reason, the fracture-cavity unit or the fracture-cavity unit is approximated as a radial sector structure Body, such as figure 2 Shown. Each sector unit is described by 3 parameters: outflow radius R w , Sector radius R, sector included angle α.
[0125] 3) Simplify the connection conditions...
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