US 12,762,304 B2Granted

Methodology for HPHISO quality map filtered by transmissibility and scan quality for post-processing of oil reservoir flow simulations

AssigneePetroleo Brasileiro S.A. - Petrobras

InventorVictor Costa Da Silva

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Abstract

The invention presents a methodology for evaluating the drainage efficiency of the proposed drainage mesh, by identifying poorly drained regions for mesh optimization and/or implementation of complementary projects, in addition to qualitatively evaluating the drainage effect of a field with different number of wells and units and, finally, comparatively evaluating the drainage quality from different reservoirs, thus observing opportunities for optimizing production management, such as activating different intelligent completion valves, for example. To achieve this objective, it applies a set of filters to the mobile HPHISO map in order to identify the regions that have the greatest potential to be explored and that will bring greater recovery gains for a given oil field.

Claims7

Dependent claims

A METHOD FOR THE HPHISO QUALITY MAP FILTERED BY TRANSMISSIBILITY, characterized in that it comprises following steps:

a. performing scale cuts, and defining the top and bottom layers of the modeled reservoir,
b. calculating the porous volume above the water-oil-contact (COA) using the equations
BVPacimaCOA
ij
=
{
0
,
Sw
ijk
⁢
(
t
i
)
>
0,90
BLOCKVOL
ijk
,
Sw
ijk
⁢
(
t
i
)
<
0,90
⁢
BLOCKVOL
ijk
=
H
ijk
*
NTG
ijk
*
PHI
ijk
,
BVPacimaCOA corresponds to a porous volume of the reservoir cell above the COA, SW corresponds to water saturation, H corresponds to thickness of the reservoir cell, NTG corresponds to net-to-gross ratio of the reservoir cell, and PHI corresponds to porosity of the reservoir cell, and
c. calculating the transmissibility applied in each cell of the model
KHijk=Hijk*√{square root over (PERMIijk*PERMJijk)}*, KH corresponds to a transmissibility of the reservoir cell, PERM corresponds to the permeability of the cell,
d. applying transmissibility filter on each model cell
filtroKHcc
ijk
=
{
1
,
KH
ijk
>
khCorte
0
,
KH
ijk
<
khCorte
,
filtroKHijk corresponds to a transmissibility filter in each model cell, and khCorte corresponds to a transmissibility cutoff threshold,
e. calculating the weighted average of the transmissibility filter by the porous volume by means of the equation
filtroHK
ij
=
∑
k
filtroKHcc
ijk
*
BVPacimaCOA
ijk
∑
k
BVPacimaCOA
ijk
applied to kBase and kTopo limits wherein kBase corresponds to an evaluated reservoir base layer and kTopo corresponds to a top layer of the evaluated reservoir;
f. calculating the mobile HPHISO integrated along the column between kBase and kTop (along the k) by means of the equation
HPHISOm
ij
=
∑
k
⁢
H
ij
*
PHI
ij
*
SOm
ij
.

93 more elements

Dependencies are inferred from the claim text.