CN107762495A - The optimization method of ultra-high water cut stage reservoir model longitudinal grid size - Google Patents
The optimization method of ultra-high water cut stage reservoir model longitudinal grid size Download PDFInfo
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- CN107762495A CN107762495A CN201610700948.7A CN201610700948A CN107762495A CN 107762495 A CN107762495 A CN 107762495A CN 201610700948 A CN201610700948 A CN 201610700948A CN 107762495 A CN107762495 A CN 107762495A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The invention provides a kind of optimization method of ultra-high water cut stage reservoir model longitudinal grid size, the optimization method of the ultra-high water cut stage reservoir model longitudinal grid size includes：Step 1；Obtain reasonable size of mesh opening under different physical property；Step 2, reservoir thickness factor of influence is obtained；Step 3, the viscosity influence factor is obtained；Step 4, aqueous factor of influence is obtained；And step 5, the calculating of the reasonable size of mesh opening in longitudinal direction.The optimization method of the ultra-high water cut stage reservoir model longitudinal grid size has the characteristics that principle is simple, workable, and improving remaining oil for the ultra-high water-containing stage describes precision, is extremely important to portray reservoir heterogeneity and fluid neuron network rule.
Description
Technical field
The present invention relates to reservoir numerical simulation application and oil-gas field development to improve oil recovery field, especially relates to
A kind of optimization method of ultra-high water cut stage reservoir model longitudinal grid size.
Background technology
At present, SHENGLI PETROLEUM AREA oil field generally enters the ultra-high water-containing stage, and interior oil reservoir remaining oil distribution is more at this stage
Complexity, characterize difficulty and be gradually increased, it is therefore desirable to further investigate ultra-high water cut stage numerical reservoir simulation method, improve remaining oil and retouch
Precision is stated, and it is extremely important to establish fine geological model to portray reservoir heterogeneity and fluid neuron network rule.With
High-resolution three-dimension seismic technology, the development of logging technique and modern geostatistics theory, reservoir characterization technology has been sent out
Open up and establish three-dimensional detailed geological model level.Fine geological model can reflect oil reservoir micro-structure, sedimentary micro and reservoir
Physical parameter Distribution Pattern, for improving oil field injection and extraction well pattern, Optimal Development scheme has the function that to hold the balance, and ensure that
The reliability of reservoir numerical simulation result.
For a medium scale oil reservoir, such geological model often has million grades even the grid rule of millions
Mould.So fine geological model is extremely important in terms of delineation reservoir heterogeneity and fluid neuron network rule.It is but oily
Engineer is hidden for the consideration of operating efficiency and computational costs and the limitation of computer amount of storage and calculating speed, it is so huge
Grid data typically cannot be used directly for reservoir numerical simulation.Therefore, how intensive grid data to be reasonably transformed into
Thicker network gets on, and just turns into an important research content of the modern oil analogue technique.In same research spatial dimension
It is interior, by the data message of fine-structure mesh case system be transformed into coarse net case system process be exactly size of mesh opening optimization, size of mesh opening
Optimization is exactly that the roughening of oil reservoir detailed geological model is arrived into the receptible grid scale of numerical simulator, is mainly embodied in indulging
To grid optimization.And how ultra-high water cut stage oil reservoir optimizes to longitudinal grid, be optimized for which kind of size more it is reasonable just into
For current urgent problem to be solved.In order to solve the above problems, it is proposed that a kind of ultra-high water cut stage reservoir model longitudinal grid chi
Very little optimization method, defined for ultra-high water cut stage reservoir model size of mesh opening from now on and offer reference and instruct.
The content of the invention
It it is the oil reservoir development later stage it is an object of the invention to provide a kind of research precision for improving ultra-high water cut stage numerical simulation
The optimization method of the ultra-high water cut stage reservoir model longitudinal grid size of more accurate technical support is provided.
The purpose of the present invention can be achieved by the following technical measures：Ultra-high water cut stage reservoir model longitudinal grid size
Optimization method, the optimization method of the ultra-high water cut stage reservoir model longitudinal grid size include：Step 1；Obtain under different physical property
Reasonable size of mesh opening；Step 2, reservoir thickness factor of influence is obtained；Step 3, the viscosity influence factor is obtained；Step 4, obtain aqueous
Factor of influence；And step 5, the calculating of the reasonable size of mesh opening in longitudinal direction.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, different differential numerical simulators under different rhythmic naturies are established, are obtained under a certain water-cut stage not
With the Core analysis under physical property between reasonable size of mesh opening.
In step 2, establish different-thickness reservoir numerical simulation model, obtain different water cut stages (95%, 96%,
97%th, 98%, 99%), the Core analysis between different-thickness and reasonable size of mesh opening, then made with the numerical value of 6m thickness models
Based on, other thickness model numerical value compare obtained reservoir thickness factor of influence plate therewith.
In step 3, establish different viscosities reservoir numerical simulation model, obtain different water cut stages (95%, 96%,
97%th, 98%, 99%), the Core analysis between different viscosities and reasonable size of mesh opening, then with viscosity 30mPa.s models
Based on numerical value, other Viscosity Model numerical value compare to obtain viscosity influence factor plate therewith.
In step 4, establish reservoir numerical simulation model, obtain different water cut stages (95%, 96%, 97%, 98%,
99%), the Core analysis between different rhythmic naturies and reasonable size of mesh opening, then with aqueous 98% when each rhythmic nature model number
Based on value, other aqueous numerical value compare obtained aqueous factor of influence plate therewith.
In steps of 5, according to formula, the reasonable size of mesh opening=a certain physical property regularity of distribution in longitudinal direction and containing underwater reasonable net
Lattice size × reservoir thickness factor of influence × viscosity influence factor × aqueous factor of influence, calculate a certain in the case of different-thickness
The physical property regularity of distribution, viscosity and containing the reasonable size of mesh opening in underwater longitudinal direction.
The optimization method of ultra-high water cut stage reservoir model longitudinal grid size in the present invention, improve ultra-high water cut stage numerical value
The research precision of simulation, more accurate technical support is provided for the oil reservoir development later stage, for ultra-high water cut stage reservoir model from now on
Size of mesh opening, which defines, to be offered reference and instructs, and has the characteristics that principle is simple, workable, thus should with promoting well
With value.
Brief description of the drawings
Fig. 1 is the stream of the specific embodiment of the optimization method of the ultra-high water cut stage reservoir model longitudinal grid size of the present invention
Cheng Tu；
Fig. 2 be aqueous 98% when difference physical property under with reasonable size of mesh opening Core analysis；
Fig. 3 is reservoir thickness factor of influence plate；
Fig. 4 is viscosity influence factor plate；
Fig. 5 is aqueous factor of influence plate.
Embodiment
To enable the invention to become apparent, it is cited below particularly go out preferred embodiment, and coordinate shown in accompanying drawing, elaborate
It is as follows.
As shown in figure 1, Fig. 1 is the flow of the optimization method of the ultra-high water cut stage reservoir model longitudinal grid size of the present invention
Figure, embodiment based on the flow chart according to carrying out.
Embodiment：
In step 1, the instance model of longitudinal grid size is established：Viscosity of crude is 30mPa.s, differential 20,10 meters
Thick, aqueous 98% positive rhythm reservoir model.Aqueous 98% can be obtained according to Fig. 2, and when differential 20 longitudinal direction under positive rhythm rock model
Reasonable size of mesh opening is 1.68m.
In step 2, the instance model of longitudinal grid size is established：Viscosity of crude is 30mPa.s, differential 20,10 meters
Thick, aqueous 98% positive rhythm reservoir model.Reservoir thickness factor of influence can be obtained as 1.74 according to Fig. 3.
In step 3, the instance model of longitudinal grid size is established：Viscosity of crude is 30mPa.s, differential 20,10 meters
Thick, aqueous 98% positive rhythm reservoir model.The viscosity influence factor can be obtained as 1 according to Fig. 4.
In step 4, the instance model of longitudinal grid size is established：Viscosity of crude is 30mPa.s, differential 20,10 meters
Thick, aqueous 98% positive rhythm reservoir model.Aqueous factor of influence can be obtained as 1 according to Fig. 5.
In steps of 5, according to formula, the reasonable size of mesh opening=a certain physical property regularity of distribution in longitudinal direction and containing underwater reasonable net
Lattice size × reservoir thickness factor of influence × viscosity influence factor × aqueous factor of influence, then the example positive rhythm rock model is reasonable
Longitudinal grid size=1.68 × 1.74 × 1 × 1=2.92m.
Claims (6)
1. the optimization method of ultra-high water cut stage reservoir model longitudinal grid size, it is characterised in that the ultra-high water cut stage oil reservoir mould
The optimization method of type longitudinal grid size includes：
Step 1, reasonable size of mesh opening under different physical property is obtained；
Step 2, reservoir thickness factor of influence is obtained；
Step 3, the viscosity influence factor is obtained；
Step 4, aqueous factor of influence is obtained；
Step 5, the calculating of the reasonable size of mesh opening in longitudinal direction.
2. the optimization method of ultra-high water cut stage reservoir model longitudinal grid size according to claim 1, it is characterised in that
In step 1, different differential numerical simulators under different rhythmic naturies are established, obtain different physical property under a certain water-cut stage
Core analysis between lower and reasonable size of mesh opening.
3. the optimization method of ultra-high water cut stage reservoir model longitudinal grid size according to claim 1, it is characterised in that
In step 2, different-thickness reservoir numerical simulation model is established, obtains different water cut stages（95%、96%、97%、98%、
99%）, the Core analysis between different-thickness and reasonable size of mesh opening, then based on the numerical value of 6m thickness models, other
Thickness model numerical value compares to obtain reservoir thickness factor of influence plate therewith.
4. the optimization method of ultra-high water cut stage reservoir model longitudinal grid size according to claim 1, it is characterised in that
In step 3, different viscosities reservoir numerical simulation model is established, obtains different water cut stages（95%、96%、97%、98%、
99%）, the Core analysis between different viscosities and reasonable size of mesh opening, base is then used as using the numerical value of viscosity 30mPa.s models
Plinth, other Viscosity Model numerical value compare to obtain viscosity influence factor plate therewith.
5. the optimization method of ultra-high water cut stage reservoir model longitudinal grid size according to claim 1, it is characterised in that
In step 4, reservoir numerical simulation model is established, obtains different water cut stages（95%、96%、97%、98%、99%）, different rhythms
Rule property and reasonable size of mesh opening between Core analysis, then by aqueous 98% when each rhythmic nature model numerical value based on, its
His aqueous numerical value compares to obtain aqueous factor of influence plate therewith.
6. the optimization method of ultra-high water cut stage reservoir model longitudinal grid size according to claim 1, it is characterised in that
In steps of 5, according to the reasonable size of mesh opening=a certain physical property regularity of distribution in formula longitudinal direction and containing underwater reasonable size of mesh opening × storage
The thickness degree factor of influence × viscosity influence factor × aqueous factor of influence, calculate a certain physical property distribution rule in the case of different-thickness
Rule, viscosity and containing the reasonable size of mesh opening in underwater longitudinal direction.
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| CN112800640A (en) * | 2019-11-14 | 2021-05-14 | 北京中科联华石油科学研究院 | Method for determining vertical grid precision of geological model |
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Application publication date: 20180306 |