CN103899285B - Multilamellar sandstone oil reservoir near limit Water-cut Period is rotated water drive method - Google Patents
Multilamellar sandstone oil reservoir near limit Water-cut Period is rotated water drive method Download PDFInfo
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Abstract
The present invention provides a kind of multilamellar sandstone oil reservoir near limit Water-cut Period to rotate water drive method, and the method includes: set up geological model based on single genetic sandstones；On the basis of setting up this geological model based on single genetic sandstones, set up remaining oil distribution model based on single genetic sandstones；Single genetic sandstones close for character is combined into genetic sandstones group；Reservoir characteristic, remaining oil distribution situation according to single genetic sandstones groups different in series of strata determine corresponding vector quantization water drive Adjusted Option；And carry out water drive of rotating based on single genetic sandstones group.This multilamellar sandstone oil reservoir near limit Water-cut Period water drive method of rotating can at utmost reduce the impact on waterflooding development of the multilamellar sandstone oil reservoir reservoir heterogeneity, realize the comprehensive displacement in single genetic sandstones longitudinal direction and the equilibrium displacement in plane, thus set up high intensity, high efficiency water drive flow field, water drive sweep efficiency and waterflood recovery efficiency factor are greatly improved.
Description
Technical field
The present invention relates to oil field development field, especially relate to a kind of multilamellar sandstone oil reservoir near limit Water-cut Period and rotate water drive method.
Background technology
Multilamellar sandstone oil reservoir is the main Types of China's continental deposit oil reservoir, belongs to river-delta sedimentary system more, and oil-containing substratum is many, and reservoir heterogeneity is serious, and the interlayer, the layer that are thus caused are interior, horizontal contradiction is the principal element affecting water flooding effectiveness.Since proposing from the Reservoir Architectural research method eighties in 20th century and being applied to subsurface reservoir research, find that in multilamellar sandstone oil reservoir, each substratum is the synthetic origin sand body with complex internal structure, is combined in the way of longitudinal overlapping, plain splice by multiple single genetic sandstones.Same single genetic sandstones is the geologic body of relative homogeneous, grows deposition interface and seepage flow blocks between different single genetic sandstones, and single genetic sandstones is only the basic waterflooding unit of multilamellar sandstone oil reservoir, is also the Basic Geological unit improving waterflood recovery efficiency factor.Near limit Water-cut Period refer to oil field development comprehensive water cut more than 95% until development phase of being experienced of oilfield waste, the recovery percent of reserves in this stage oil field is typically between 30-40%, although aqueous the highest, but still the remaining oil having more than half is contained and is not plucked out of in reservoir.According to Shengli Oil Field sealed coring well core analysis in recent years, near limit Water-cut Period average residual oil saturation is about 40%, and remaining oil is differentiation distribution with single genetic sandstones for elementary cell.Therefore, near limit Water-cut Period is the important stage of oil field development, high water-cut development is its basic law and basic feature, and by increasing water drive sweep efficiency and the oil-water displacement efficiency of single genetic sandstones in reservoir further, waterflood recovery efficiency factor still has bigger room for promotion.
Currently, the waterflooding development technology of multilamellar sandstone oil reservoir mainly includes that straticulate exploration divides and well pattern adjusts two aspects.(1) series of strata partitioning technology is mainly for the interlayer heterogeneity of multilamellar sandstone oil reservoir, by oil reservoir close for feature is combined, individually exploits the impact reducing interlayer difference to oil reservoir development by a set of well pattern.In theory, series of strata divide and can be fine to interlayer difference is completely eliminated, it is achieved the equilibrium exploitation of each substratum in series of strata.But in oil field actual development is put into practice, owing to straticulate exploration must have certain reserves scale and technology, economic feasibility, it is impossible to infinitely segment.Therefore, in the screen work that current series of strata divide, due to the complexity of continental reservoir, interlayer difference the most generally exists, and reservoir difference based on single genetic sandstones is more prominent, and in thus causing series of strata, the water-flooding performance of each single genetic sandstones is the most unbalanced.According to profile-log of water injection statistics, in a set of straticulate exploration, the water injection rate of 80% is sucked by the single genetic sandstones of 20%, show in series of strata that longitudinal water drive involves thickness and be far smaller than oil reservoir gross thickness, relying on straticulate exploration to divide to be difficult to solve longitudinal contradiction, longitudinal water drive sweep efficiency has much room for improvement at all.(2) well pattern adjusting technology is on the basis of series of strata divide, and well spacing density, hole pattern and water flooding regime are optimized the process of design according to reservoir space distribution situation in series of strata.Present Domestic outer overwhelming majority oil field all uses the hole pattern with regular geometric form, and water flooding regime mainly includes the several types such as line drive water injection, pattern water flooding, spot flooding, edge water filling.At the initial stage of oil reservoir development, well spacing density is the least, and along with going deep into of exploitation, the continuous infilled well pattern of main employing, improvement water flooding regime improve reserves controlling extent and water-flooding performance.In the near limit aqueous development phase, multilamellar sandstone oil reservoir water drive sweep efficiency to be greatly improved and waterflood recovery efficiency factor, demand for well pattern can not be limited only to increase reserves controlling extent and water-flooding performance, and in straticulate exploration to be realized, the equilibrium displacement in each single genetic sandstones plane and water drive involve maximization.Specifically, owing to including multiple single genetic sandstones in straticulate exploration, the permeability of each single genetic sandstones has directivity, and the well net deployment mode of near limit Water-cut Period and water drive mode are wanted to form vector quantization displacement with the geology vectors match of single genetic sandstones.Such as, increase injector producer distance in sand body principal permeability direction or reduce displacement intensity, reduce injector producer distance in sand body sub-percolation rate direction or increase displacement intensity, realizing the equilibrium displacement of single genetic sandstones with this.Owing to current well pattern adjusting technology is using straticulate exploration as basic deployment unit and waterflooding development unit, Grouping of Sand Members And Well need to take into account series of strata in multiple substratums and the exploitation of single genetic sandstones, it is impossible to carry out the vector quantization of displacement intensity on different water drive direction for the plane heterogeneity of each single genetic sandstones and adjust.Therefore, Well pattern edjustment based on straticulate exploration is difficult to solve horizontal contradiction, and plane water drive sweep efficiency needs to be improved further.
Due to the limitation of above-mentioned waterflooding development technology, the recovery ratio in waterflooding development oil field is caused to be difficult to be largely increased.According to 25, whole nation oil field statistics, relying on above-mentioned conventional water driving technology, average external volume sweep efficiency is 0.693, average oil displacement efficiency 0.531, and average waterflood recovery efficiency factor is 0.367.We have invented a kind of new multilamellar sandstone oil reservoir near limit Water-cut Period to rotate water drive method for this, solve above technical problem.
Summary of the invention
It is an object of the invention to provide a kind of series of strata that can make up to divide and the deficiency of well pattern adjusting technology, it is achieved the multilamellar sandstone oil reservoir near limit Water-cut Period being greatly improved of longitudinal water drive sweep efficiency and plane water drive sweep efficiency is rotated water drive method.
The purpose of the present invention can be achieved by the following technical measures: multilamellar sandstone oil reservoir near limit Water-cut Period is rotated water drive method, and this multilamellar sandstone oil reservoir near limit Water-cut Period water drive method of rotating includes: step 1, sets up geological model based on single genetic sandstones；Step 2, on the basis of setting up this geological model based on single genetic sandstones, sets up remaining oil distribution model based on single genetic sandstones；Step 3, is combined into genetic sandstones group by single genetic sandstones close for character；Step 4, determines corresponding vector quantization water drive Adjusted Option according to reservoir characteristic, the remaining oil distribution situation of single genetic sandstones groups different in series of strata；And step 5, carry out water drive of rotating based on single genetic sandstones group.
The purpose of the present invention realizes also by following technical measures:
This multilamellar sandstone oil reservoir near limit Water-cut Period water drive method of rotating also includes, before step 1, assesses and adjust multilamellar sandstone oil reservoir existing straticulate exploration splitting scheme.
Principle when being estimated this multilamellar sandstone oil reservoir existing straticulate exploration splitting scheme is, in series of strata, each substratum physical property is close, the total quantity of substratum less than 10, series of strata wall is stable, possess certain reserves scale, substratum lengthwise position is adjacent in series of strata, pressure system and fluid properties close.
In step 1, utilize reservoir architecture to analyze method and the reservoir internal structure of substratum each in straticulate exploration is carried out fine description, portray vertical stacked, lateral splicing relation and the space distribution rule of the internal single genetic sandstones of substratum, utilize Geologic modeling software to set up this geological model based on single genetic sandstones.
Step 1 includes: is observed by core and describes, setting up individual well lithofacies successions, determine depositional environment, Sandbody Genetic Types, deposition interface level time and feature；Utilize seismic fine interpretation, High resolution sequence stratigraphy analysis, phased High-resolution Cyclostratigraphy control methods to carry out the internal sand body cascade correlation of substratum, set up single phase sand body Stratigraphic framework, specify stacked manner and the space distribution rule of different origins sand body；And substratum inner stages deposition interface and the spatial distribution characteristic of construction unit are described, specify the origin cause of formation of seepage flow barrier, type, the regularity of distribution, set up this geological model based on single genetic sandstones.
Step 2 includes: utilizes remaining oil saturation monitoring materials to set up the internal remaining oil distribution pattern of substratum, specifies rule of waterflooding；Exploitation dynamic analysing method, determines the water drive producing status of single genetic sandstones, calculates Abundance of remaining reserves；And utilize method for numerical simulation, and quantitative description single genetic sandstones remaining oil saturation distribution situation, set up this remaining oil distribution model based on single genetic sandstones.
Step 3 includes: extract the area of each single genetic sandstones, thickness, paleocurrent direction, distributional pattern, distribution, oil in place, remaining reserves, porosity, permeability, remaining oil saturation parameter；And utilize multiparameter clustering method, and single genetic sandstones is divided into that character is close some groups, in each single genetic sandstones group, the quantity of single genetic sandstones controls within 3, and in this, as basic waterflooding development unit.
In step 4, plan as a whole Grouping of Sand Members And Well resource, reservoir characteristic, remaining oil distribution situation according to single genetic sandstones groups different in series of strata work out corresponding vector quantization water drive Adjusted Option respectively, the well pattern that the water drive Adjusted Option of each single genetic sandstones group is used is existing well pattern based on whole straticulate exploration, according to the difference of development object, use the water drive Adjusted Option that local repair fills completely penetrating well, injection-production well is not changed and the formulation of oil-water well vector quantization production and injection proration is different.
This multilamellar sandstone oil reservoir near limit Water-cut Period water drive method of rotating also includes, before step 5, adjusts the strength of water drive on different water drive direction according to the directivity of single genetic sandstones permeability；And according to different directions displacement pressure gradient and the injector producer distance of reality, determine corresponding well water injection rate and oil well Discharge rate.
When the directivity according to single genetic sandstones permeability adjusts the strength of water drive on different water drive direction, the vector quantization water drive Adjusted Option of single genetic sandstones group uses the principle of equilibrium water drive, realize injecting water each equal or close to migration velocity in heterogeneous reservoir, avoid injecting water and along advantage seepage direction channelling and form low effective circulation, sand body principal permeability direction is advantage seepage direction, strength of water drive need to be reduced, sand body sub-percolation rate direction then needs to strengthen water drive, the difference of different directions strength of water drive uses displacement pressure gradient to be controlled and characterize, by the displacement pressure gradient between design different directions oil-water well, set up the vector quantization water drive mode being consistent with sand body plane heterogeneity.
When determining corresponding well water injection rate and oil well Discharge rate, according to equilibrium displacement principle, the ratio (P1/P2) of different directions displacement pressure gradient and the ratio (K1/K2) of permeability meet following relation:, principle according to preferential strengthening sub-percolation rate direction water drive, with on sub-percolation rate direction can mining site realize maximum injecting quantity, water injection pressure, maximum Discharge rate, bottom hole flowing pressure and average injector producer distance calculate the displacement pressure gradient in the direction, as benchmark, according to different directions displacement pressure gradient than the relation with the ratio of permeability, calculate the displacement pressure gradient in principal permeability direction.
In steps of 5, the order of water drive of rotating with each single genetic sandstones group remaining reserves size as sort by, the preferential displacement that remaining reserves are big；The cycle of water drive of rotating with each single genetic sandstones group natural declining rate on stream for conversion foundation, year natural declining rate more than 8% time be transformed into next single genetic sandstones group exploitation.
This multilamellar sandstone oil reservoir near limit Water-cut Period water drive method of rotating also includes, after step 5, uses packer to separate the genetic sandstones group being in the exploitation cycle and the genetic sandstones group being in hibernation.
Multilamellar sandstone oil reservoir near limit Water-cut Period in the present invention is rotated water drive method, the continuous water drive mode being currently based on whole straticulate exploration is converted to water drive mode of rotating based on genetic sandstones group single in series of strata, can at utmost reduce the impact on waterflooding development of the multilamellar sandstone oil reservoir reservoir heterogeneity, realize the comprehensive displacement in single genetic sandstones longitudinal direction and the equilibrium displacement in plane, thus set up high intensity, high efficiency water drive flow field, water drive sweep efficiency and waterflood recovery efficiency factor are greatly improved.Adjusted by the vector quantization water drive in single genetic sandstones group plane, plane water drive sweep efficiency can be improved to nearly 1.0；By rotating, oil reservoir longitudinal direction water drive sweep efficiency can be improved to nearly 1.0 within a cycle of rotating by development scheme；Within the construction cycle of each single genetic sandstones group, by simplifying pour and pluck structure, improve Injection volume further, oil displacement efficiency can be improved to 0.7；Finally realize oil reservoir volumetric sweep efficiency and reach more than 0.9, the target of waterflood recovery efficiency factor challenge 0.6.It addition, rotate, the development effectiveness acquired by water drive method is mainly obtained by the significantly prolongation of oil reservoir economic development time under stable productivity, the beneficially harmonious development of old filed development late stage economic society.
Accompanying drawing explanation
Fig. 1 is that the multilamellar sandstone oil reservoir near limit Water-cut Period of the present invention is rotated the flow chart of a specific embodiment of water drive method.
Detailed description of the invention
For making the above and other objects, features and advantages of the present invention to become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
The flow chart of water drive method as it is shown in figure 1, the multilamellar sandstone oil reservoir near limit Water-cut Period that Fig. 1 is the present invention is rotated.
In step 101, assess and adjust multilamellar sandstone oil reservoir existing straticulate exploration splitting scheme.Straticulate exploration splitting scheme existing to multilamellar sandstone oil reservoir is estimated, and the overall principle is: each substratum physical property close (differential control at 3-5) in series of strata, substratum sum can not too much (quantity is less than 10), series of strata wall stable (compartment thickness is more than 3m), possess that substratum lengthwise position in certain reserves scale (utilizing oil area, effective thickness, single well productivity, well depth, economic evaluation comprehensively to determine), series of strata is adjacent, pressure system and fluid properties close.If existing series of strata splitting scheme is unreasonable, straticulate exploration need to be adjusted.Flow process enters into step 102.
In step 102, set up geological model based on single genetic sandstones.Utilize reservoir architecture to analyze method and the reservoir internal structure of substratum each in straticulate exploration is carried out fine description, portray vertical stacked, lateral splicing relation and the space distribution rule of the internal single genetic sandstones of substratum, utilize Geologic modeling software to set up geological model based on single genetic sandstones.Concrete research step includes: is 1. observed by core and describes, setting up individual well lithofacies successions, determines depositional environment, Sandbody Genetic Types, deposition interface level time and feature；2. utilize seismic fine interpretation, High resolution sequence stratigraphy analysis, phased High-resolution Cyclostratigraphy control methods to carry out the internal sand body cascade correlation of substratum, set up single phase sand body Stratigraphic framework, specify stacked manner and the space distribution rule of different origins sand body；3. describe substratum inner stages deposition interface and the spatial distribution characteristic of construction unit, specify the origin cause of formation of seepage flow barrier, type, the regularity of distribution, set up reservoir 3-d modelling model based on single genetic sandstones.Flow process enters into step 103.
In step 103, on the basis of setting up single genetic sandstones geological model, set up remaining oil distribution model based on single genetic sandstones.On the basis of setting up single genetic sandstones geological model, utilize remaining oil saturation monitoring, development behavior analysis, Numerical Method Study Remaining Oil Distribution, specify remaining reserves scale, potentiality of remaining oil and the distribution characteristics of single genetic sandstones, set up remaining oil distribution model based on single genetic sandstones.Concrete research step includes: 1. utilizes remaining oil saturation monitoring materials to set up the internal remaining oil distribution pattern of substratum, specifies rule of waterflooding；2. exploitation dynamic analysing method, determines the water drive producing status of single genetic sandstones, calculates Abundance of remaining reserves；3. method for numerical simulation is utilized, quantitative description single genetic sandstones remaining oil saturation distribution situation.Flow process enters into step 104.
In step 104, single genetic sandstones close for character is combined into " genetic sandstones group ".In systematic analysis straticulate exploration, the quantity of single genetic sandstones, scale, the regularity of distribution, paleocurrent direction are with transitivity, oiliness distribution characteristics, single genetic sandstones close for character is combined into " genetic sandstones group ", character is close, lengthwise position is adjacent or non-conterminous single genetic sandstones forms, in this, as basic waterflooding development unit by 1-3 for each genetic sandstones group.The concrete dividing mode of genetic sandstones group is: 1. extract 10 parameters such as the area of each single genetic sandstones, thickness, paleocurrent direction, distributional pattern, distribution, oil in place, remaining reserves, porosity, permeability, remaining oil saturation；2. utilizing multiparameter clustering method, some groups that single genetic sandstones is divided into character is close, in each single genetic sandstones group, the quantity of single genetic sandstones controls within 3, to adapt to the demand of demixing injection-production technique.Flow process enters into step 105.
In step 105, determine corresponding vector quantization water drive Adjusted Option according to reservoir characteristic, the remaining oil distribution situation of single genetic sandstones groups different in series of strata.Plan as a whole Grouping of Sand Members And Well resource, work out corresponding vector quantization water drive Adjusted Option respectively according to reservoir characteristic, the remaining oil distribution situation of single genetic sandstones groups different in series of strata.The well pattern that the water drive Adjusted Option of each single genetic sandstones group is used is all based on the existing well pattern of whole straticulate exploration, according to the difference of development object, local repair is used to fill completely penetrating well, injection-production well does not change and the mode such as oil-water well vector quantization production and injection proration works out different water drive Adjusted Option.Flow process enters into step 106.
In step 106, adjust the strength of water drive on different water drive direction according to the directivity of single genetic sandstones permeability.The vector quantization water drive Adjusted Option of single genetic sandstones group uses the principle of equilibrium water drive, directivity according to single genetic sandstones permeability adjusts the strength of water drive on different water drive direction, realize injecting water each equal or close to migration velocity in heterogeneous reservoir, it is to avoid inject water and along advantage seepage direction channelling and form low effective circulation.Wherein, sand body principal permeability direction is advantage seepage direction, need to reduce strength of water drive, and sand body sub-percolation rate direction then needs to strengthen water drive.The difference of different directions strength of water drive uses displacement pressure gradient to be controlled and characterize, by the displacement pressure gradient between design different directions oil-water well, set up the vector quantization water drive mode being consistent with sand body plane heterogeneity, be greatly improved so that water drive plane sweep efficiency has before relatively adjusting.Flow process enters into step 107.
In step 107, according to different directions displacement pressure gradient and the injector producer distance of reality, determine corresponding well water injection rate and oil well Discharge rate.According to equilibrium displacement principle, the ratio (P1/P2) of different directions displacement pressure gradient and the ratio (K1/K2) of permeability meet following relation:.Principle according to preferential strengthening sub-percolation rate direction water drive, so that the mining site maximum injecting quantity, water injection pressure, maximum Discharge rate, bottom hole flowing pressure and the average injector producer distance that realize the displacement pressure gradient in the direction can be calculated on sub-percolation rate direction, as benchmark, according to different directions displacement pressure gradient than the relation with the ratio of permeability, calculate the displacement pressure gradient in principal permeability direction.According to different directions displacement pressure gradient and the injector producer distance of reality, determine corresponding well water injection rate and oil well Discharge rate, it is achieved equilibrium displacement.Flow process enters into step 108.
In step 108, carry out water drive of rotating based on single genetic sandstones group.After the vector quantization water drive Adjusted Option completing each single genetic sandstones group designs, implement water drive of rotating based on single genetic sandstones group.The order of water drive of rotating with each single genetic sandstones group remaining reserves size as sort by, the preferential displacement that remaining reserves are big；The cycle of water drive of rotating with each single genetic sandstones group natural declining rate on stream for conversion foundation, year natural declining rate more than 8% time be transformed into next single genetic sandstones group exploitation.Flow process enters into step 109.
In step 109, packer is used to separate the genetic sandstones group being in the exploitation cycle and the genetic sandstones group being in hibernation.The conversion of single genetic sandstones group construction cycle is with demixing injection-production technology for relying on, when between single genetic sandstones, thickness of interlayer seals thickness less than the lesser calorie of packer, near interlayer to be passed through single genetic sandstones keep away penetrate, the technological measure such as casing patching use the accurately card envelope reserved location for packer so that be between the genetic sandstones group in exploitation cycle and the genetic sandstones group being in hibernation formation and separate reliably.Flow process terminates.
The multilamellar sandstone oil reservoir near limit Water-cut Period of the present invention is rotated water drive method, on the basis of straticulate exploration splitting scheme existing to multilamellar sandstone oil reservoir is estimated and adjusts, utilize reservoir architecture to analyze method and the reservoir internal structure of substratum each in straticulate exploration is carried out fine description, set up geological model based on single genetic sandstones；Utilize remaining oil saturation monitoring, development behavior analysis, Numerical Method Study Remaining Oil Distribution, set up remaining oil distribution model based on single genetic sandstones；Quantity according to genetic sandstones single in series of strata, scale, the regularity of distribution, paleocurrent direction are with transitivity, oiliness distribution characteristics, utilize multiparameter clustering method, single genetic sandstones close for character is combined into " genetic sandstones group ", in this, as basic waterflooding development unit；Plan as a whole Grouping of Sand Members And Well resource, reservoir characteristic, remaining oil distribution situation according to single genetic sandstones groups different in series of strata work out corresponding vector quantization water drive Adjusted Option respectively, directivity according to single genetic sandstones permeability adjusts the strength of water drive on different water drive direction, according to different directions displacement pressure gradient and the injector producer distance of reality, determine corresponding well water injection rate and oil well Discharge rate；Implement to rotate water drive to different single genetic sandstones groups, the order of water drive of rotating is with each single genetic sandstones group remaining reserves size as sort by, the preferential displacement that remaining reserves are big, the cycle of water drive of rotating with each single genetic sandstones group natural declining rate on stream for conversion foundation, year natural declining rate more than 8% time be transformed into next single genetic sandstones group exploitation.
Claims (6)
1. multilamellar sandstone oil reservoir near limit Water-cut Period is rotated water drive method, it is characterized in that, this multilamellar sandstone oil reservoir near limit Water-cut Period water drive method of rotating includes: assess and adjust multilamellar sandstone oil reservoir existing straticulate exploration splitting scheme, principle when being estimated this multilamellar sandstone oil reservoir existing straticulate exploration splitting scheme is, in series of strata, each substratum physical property is close, substratum total quantity less than 10, series of strata wall is stable, possess certain reserves scale, substratum lengthwise position is adjacent in series of strata, pressure system and fluid properties close；
Step 1, sets up geological model based on single genetic sandstones；
Step 2, on the basis of setting up this geological model based on single genetic sandstones, sets up remaining oil distribution model based on single genetic sandstones；
Step 3, is combined into single genetic sandstones group by single genetic sandstones close for character；
Step 4, determines corresponding vector quantization water drive Adjusted Option according to reservoir characteristic, the remaining oil distribution situation of single genetic sandstones groups different in series of strata；
Directivity according to single genetic sandstones permeability adjusts the strength of water drive on different water drive direction；And according to different directions displacement pressure gradient and the injector producer distance of reality, determine corresponding well water injection rate and oil well Discharge rate；
When the directivity according to single genetic sandstones permeability adjusts the strength of water drive on different water drive direction, the vector quantization water drive Adjusted Option of single genetic sandstones group uses the principle of equilibrium water drive, realize injecting water each equal or close to migration velocity in heterogeneous reservoir, avoid injecting water and along advantage seepage direction channelling and form low effective circulation, sand body principal permeability direction is advantage seepage direction, strength of water drive need to be reduced, sand body sub-percolation rate direction then needs to strengthen water drive, the difference of different directions strength of water drive uses displacement pressure gradient to be controlled and characterize, by the displacement pressure gradient between design different directions oil-water well, set up the vector quantization water drive mode being consistent with sand body plane heterogeneity；And
Step 5, carries out water drive of rotating based on single genetic sandstones group.
Multilamellar sandstone oil reservoir near limit Water-cut Period the most according to claim 1 is rotated water drive method, it is characterized in that, in step 1, utilize reservoir architecture to analyze method and the reservoir internal structure of substratum each in straticulate exploration is carried out fine description, portray vertical stacked, lateral splicing relation and the space distribution rule of the internal single genetic sandstones of substratum, utilize Geologic modeling software to set up this geological model based on single genetic sandstones.
Multilamellar sandstone oil reservoir near limit Water-cut Period the most according to claim 1 is rotated water drive method, it is characterised in that step 1 includes:
Observed by core and describe, setting up individual well lithofacies successions, determine depositional environment, Sandbody Genetic Types, deposition interface level time and feature；
Utilize seismic fine interpretation, High resolution sequence stratigraphy analysis, phased High-resolution Cyclostratigraphy control methods to carry out the internal sand body cascade correlation of substratum, set up single phase sand body Stratigraphic framework, specify stacked manner and the space distribution rule of different origins sand body；And
Describe substratum inner stages deposition interface and the spatial distribution characteristic of construction unit, specify the origin cause of formation of seepage flow barrier, type, the regularity of distribution, set up this geological model based on single genetic sandstones.
Multilamellar sandstone oil reservoir near limit Water-cut Period the most according to claim 1 is rotated water drive method, it is characterised in that step 2 includes:
Utilize remaining oil saturation monitoring materials to set up the internal remaining oil distribution pattern of substratum, specify rule of waterflooding；
Exploitation dynamic analysing method, determines the water drive producing status of single genetic sandstones, calculates Abundance of remaining reserves；And
Utilize method for numerical simulation, quantitative description single genetic sandstones remaining oil saturation distribution situation, set up this remaining oil distribution model based on single genetic sandstones.
Multilamellar sandstone oil reservoir near limit Water-cut Period the most according to claim 1 is rotated water drive method, it is characterised in that step
3 include:
Extract the area of each single genetic sandstones, thickness, paleocurrent direction, distributional pattern, distribution, oil in place, remaining reserves, porosity, permeability, remaining oil saturation parameter；And
Utilize multiparameter clustering method, single genetic sandstones is divided into that character is close some groups, in each single genetic sandstones group, the quantity of single genetic sandstones controls within 3, and in this, as basic waterflooding development unit.
Multilamellar sandstone oil reservoir near limit Water-cut Period the most according to claim 1 is rotated water drive method, it is characterized in that, in step 4, plan as a whole Grouping of Sand Members And Well resource, reservoir characteristic according to single genetic sandstones groups different in series of strata, remaining oil distribution situation works out corresponding vector quantization water drive Adjusted Option respectively, the well pattern that the water drive Adjusted Option of each single genetic sandstones group is used is existing well pattern based on whole straticulate exploration, difference according to development object, local repair is used to fill completely penetrating well, injection-production well is not changed and oil-water well vector quantization production and injection proration works out different water drive Adjusted Option.
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