A sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application
A technology for oil and gas reservoirs and sand control, which is applied in earthwork drilling, wellbore/well components, production fluids, etc. It can solve the problems that the actual damage pattern of the formation cannot be included, and the formation filling pattern cannot be accurately grasped and judged, so as to reduce the near-wellbore Effects of flow resistance, reduced flow resistance, and increased pressure loss
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[0058] The method for sand control and production stimulation applied to loose sandstone oil and gas reservoirs with petrophysical properties between plasticity and brittleness includes the following steps:
[0059] (1) Pseudo-sand control and production stimulation mode and filling form: the near-wellbore zone close to the wellbore is in the plastic extrusion filling failure mode, and extrusion forms an annular columnar filling gravel layer with a certain thickness around the wellbore; outside the annular columnar gravel layer Fracture-packing zones extruded in the strata to form double wings, see figure 1 ; Realize the coexistence of the near-well plastic extrusion filling layer and the far-well fracture filling zone, which can not only effectively block sand, but also achieve high-efficiency stimulation.
[0060] (2) Discrimination of target reservoir adaptability: to determine whether the target reservoir is suitable for the sand control and production stimulation mode and...
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