CN107387042B - Carbonate Reservoir two adopts the method for the middle and later periods improving recovery ratio - Google Patents
Carbonate Reservoir two adopts the method for the middle and later periods improving recovery ratio Download PDFInfo
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- CN107387042B CN107387042B CN201710826990.8A CN201710826990A CN107387042B CN 107387042 B CN107387042 B CN 107387042B CN 201710826990 A CN201710826990 A CN 201710826990A CN 107387042 B CN107387042 B CN 107387042B
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of methods that Carbonate Reservoir two adopts middle and later periods raising recovery ratio, it is characterised by comprising: determining according to Carbonate Reservoir, geologic information, oilwell drilling situation and production feature and Carbonate Reservoir two adopting middle and later periods remaining oil there are geological types；According to tired production situation, secondary oil recovery measure and the failure conditions of oil well, remaining oil preservation mode is judged；And the type for different remaining oils, using the different weak water schemes of benefit oil, there are geological types and remaining oil preservation mode to limit jointly by remaining oil for the type of remaining oil, wherein, the benefit oil weak water material different for the different weak water Scheme Choices of benefit oil, selects different injection technologies for selected different material.
Description
Technical field
The middle and later periods, which is adopted, the present invention relates to petrol resources exploitation field more particularly to a kind of Carbonate Reservoir two improves harvesting
The method of rate.
Background technique
Based on surface layer weathering crust, underground underground river solution cavity, disconnected control karst, oil reservoir has to be buried Carbonate Reservoir Reservoir Body
The feature that hiding is deep, heterogeneity is strong, bottom water is strong, hiding oil mass natural depletion is fast, causes two to adopt limitation, overall recovery ratio is low.
It is that flush stage is short, water-free oil production period is short, energy that Carbonate Oil, which ensconces aggregate performance in natural energy recovery process,
Decline is fast.Secondary oil recovery mainly passes through gas injection, water filling supplement stratum energy, and is remained between well of taping the latent power by well group gas injection, water filling
Excess oil.Secondary oil recovery middle and later periods well group is filled the water through excessive round, after gas injection, forms predominant pathway between well, and easily formed has channeling or
Water breakthrough will lead to gas injection or water filling failure, even if there is remaining oil abundant between well, whole recovery percent of reserves is also still lower.
Therefore, it a kind of cost-effective means is found taps the latent power and two adopt remaining oil between middle and later periods well, improve remaining oil producing journey
Degree is the key that improve Carbonate Reservoir recovery ratio.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the method that the Carbonate Reservoir two of problem adopts middle and later periods raising recovery ratio.
Content according to the present invention provides a kind of method that Carbonate Reservoir two adopts middle and later periods raising recovery ratio, comprising:
According to Carbonate Reservoir, geologic information, oilwell drilling situation and production feature determine that Carbonate Reservoir two is adopted
There are geological types for middle and later periods remaining oil；
According to tired production situation, secondary oil recovery measure and the failure conditions of oil well, remaining oil preservation mode is judged；And
For the type of different remaining oils, using the different weak water schemes of benefit oil, the type of remaining oil is deposited by remaining oil
It is limited jointly in geological type and remaining oil preservation mode,
Wherein, the benefit oil weak water material different for the different weak water Scheme Choices of benefit oil, for selected difference
Material select different injection technologies.
Carbonate Reservoir two provided by the invention adopts the method for the middle and later periods improving recovery ratio, and it is rich targetedly to carry out grease
It plays chess, controls the advantage function of water, improve remaining oil producing degree and then effectively improve carbonate reservoir two and adopt adopting for middle and later periods
Yield.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows the method according to an embodiment of the present invention for adopting middle and later periods raising recovery ratio for Carbonate Reservoir two
Flow chart.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Fig. 1 shows the method according to an embodiment of the present invention for adopting middle and later periods raising recovery ratio for Carbonate Reservoir two
Flow chart.As shown in Figure 1, this method includes the following steps S110- step S130.
Step S110, according to Carbonate Reservoir, geologic information, oilwell drilling situation and production feature determine carbonate rock
Oil reservoir two adopts middle and later periods remaining oil, and there are geological types.
According to geological structure, seismic data, the drilling time curve of oil well, drilling well leakage situation, log, acid fracturing curve,
The condition of production, the analysis well relevant to region locating for oil well such as all previous well workover situation, measure handling situations or well group institute
Belong to the type of geological type, such as surface layer weathering crust type, Caves, slit formation.
Step S120 judges remaining oil preservation side according to tired production situation, secondary oil recovery measure and the failure conditions of oil well
Formula.
It is adopted according to the tired production situation of oil well and well group, individual well water filling, individual well gas injection, well group water filling, well group gas injection etc. are secondary
Oily measure and failure conditions judge Carbonate Reservoir crude oil recovery percent of reserves and two adopt middle and later periods remaining oil there are geological types, and
Determine the range exploited potentialities, such as around the top or lower part, nearly well of this well payzone section between a certain range, remote well well.
Adopting middle and later periods remaining oil according to Tahe Carbonate Reservoir two, there are geological type and preservation modes by remaining oil
Cloth type is divided into tetra- seed type of I, II, III, IV, and table 1 is Tahe Remained Oil In Carbonate Rocks distribution pattern table.
Table 1
I type feature: remaining oil is that emergence karst well group in surface layer fills the water remaining oil between the well after failing, and fills the water water stream channel
It with seepage flow and pipe stream and deposits, there are clear superiority channels, but stratum injection is general.
II type feature: remaining oil is the remaining oil after the more round water fillings of solution cavity, gas injection failure, mostly by bottom water or the shadow of side water
It rings, water cone degree is high, and water stream channel dominance, which blocks original oil flow channel, in grease gambling process leads to oil well High water cut or note
Enter water to alter along water flow predominant pathway into losing oil displacement efficiency.
Type III feature: remaining oil be the vertical adjacent upper part of fractured reservoir oil well production interval and adjacent bottom portions remaining oil,
Water body enters pay interval by certain crack, fills the water also along this crack by causing displacement invalid, gas injection has because of Substitution Spaces
Limit effect is small.
IV type feature: remaining oil between well of the remaining oil between fractured reservoir oil well and oil well, water filling or the easy edge of gas injection
Well is altered in crack can not link up such remaining oil.
Step S130, for the type of different remaining oils, using the different weak water schemes of benefit oil, the type of remaining oil by
There are geological types and remaining oil preservation mode to limit jointly for remaining oil, wherein for the different weak water Scheme Choices of benefit oil
The different weak water materials of benefit oil, selects different injection technologies for selected different material.
According to the type characteristic of remaining oil, it is advantage due to water in grease gambling process that analysis and summary remaining oil difficulty, which is employed,
Effect causes remaining oil to exist, and is mainly shown as three kinds of forms, first is that water filling forms predominant pathway and causes remaining oil can not be by wave
And；Second is that water cone causes water stream channel to enter pit shaft and shut oil flow channel；Third is that water filling does not play displacement along fracture seepage flow
The effect of remaining oil.Therefore, targetedly carry out grease game, control the advantage function of water, be to improve carbonate reservoir to remain
The key of excess oil coefficient of mining, for different types of remaining oil, method particularly includes:
I type remaining oil: by remote well block or reduce advantage water stream channel, force injection water along secondary channel flowing or
Start new water stream channel, expands floood conformance, thus remaining oil between well of taping the latent power.
II type remaining oil: floating type partition is formed in solution cavity, water cone is suppressed, restores original oil flow channel.
Type III remaining oil: utilizing Open-Hole Section part embolism, blocks the entrance that water flow fissure channel enters pit shaft, again also
Former original oil stream fissure channel.
IV type remaining oil: injection size tunable, the particle that density is controllable, oil-water selectivity is controllable, deformation extent is controllable,
Blocking is accumulated at remote well area fracture shape change or aperture change, forces injection water to pass through along other cracks, or open and newly split
Seam, thus expand floood conformance, displacement remaining oil.
Meanwhile for different types of remaining oil, the weak water material of benefit oil in grease gambling process is targetedly selected,
Specifically material includes:
For the weak water material of the oil of benefit used by I type remaining oil are as follows: temperature be 120 DEG C -170 DEG C, salinity 22
×104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil-water coexistence formation condition under, water-soluble polymer or
Colloid.
For the weak water material of the oil of benefit used by II type remaining oil are as follows: temperature be 120 DEG C -170 DEG C, salinity 22
×104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil-water coexistence formation condition under, it is not soluble in water, insoluble in oil,
Density is between water flooding and crude oil and can soften adhesion or self assembly in the powdered or particulate material of glassy state.
For the weak water material of the oil of benefit used by type III remaining oil are as follows: temperature is 120 DEG C -170 DEG C, salinity is
22×104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil-water coexistence formation condition under, can be bonded with stratum,
Pressure-bearing meets high pressure water injection demand and can break the substance of glue or degradation.
For the weak water material of the oil of benefit used by IV type remaining oil are as follows: temperature be 120 DEG C -170 DEG C, salinity 22
×104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil-water coexistence formation condition under, performance is stable and deformation journey
The controllable solid matter of degree, partial size, oil-water selectivity, density.
After the weak water material of benefit oil for selecting different grease games for different types of remaining oil, according to material property and
The difference of the function of realization selects different injection technologies for different types of remaining oil, specifically includes:
For the weak water material of the oil of benefit used by I type remaining oil, injection technology are as follows: control discharge capacity high concentration injection is protected
The weak water of card benefit oil enters remote well with material, avoids pit shaft plastic.
For the weak water material of the oil of benefit used by II type remaining oil, injection technology are as follows: the injection of small displacement high concentration, it is ensured that
The sharp weak water material of oil has sufficient time softening adhesion or realizes self assembly.
For the weak water material of the oil of benefit used by type III remaining oil, injection technology are as follows: the injection of huge discharge high pressure, it is ensured that
The sharp weak water material of oil can consolidate or plastic on Open-Hole Section stratum.
For the weak water material of the oil of benefit used by IV type remaining oil, injection technology are as follows: huge discharge injects, and is in section in stratum
Match stream accumulates blocking at fracture shape change or aperture change.
Carbonate Reservoir two provided by the invention adopts the middle and later periods and improves recovery ratio method, by analyzing Tahe carbonate rock
Reservoir geology characteristics of reservoirs and remaining oil feature, the method for finding the weak water of benefit oil in carbonate reservoir grease gambling process, there is needle
The material of the sharp weak water of oil is selected property, and controls different injection technologies according to material characteristics and functional objective selection, effectively
Ground adjusts grease Game Relationship, increases floood conformance, expansion or restores oil flow channel, effective Remaining Oil improves carbonate
The recovery ratio of middle and later periods is adopted in shale oil hiding two, is a kind of method for cost-effectively improving carbonate reservoir ultimate recovery.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can be directly true according to disclosure of invention
Determine or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is it should be understood that and recognize
It is set to and covers all such other variations or modifications.
In addition, although describing the present invention in the accompanying drawings with particular order implements operation, this is not required that or secretly
These operations must be executed in this particular order by showing, or is had to carry out operation shown in whole and be just able to achieve desired knot
Fruit.It can be omitted certain steps, multiple steps merged into a step and are executed, or a step is divided into multiple steps and is held
Row.
Method and specific implementation method of the invention are described in detail above, and give corresponding implementation
Example.Certainly, in addition to the implementation, the present invention can also have other embodiment, all to use equivalent substitution or equivalent transformation shape
At technical solution, all fall within invention which is intended to be protected.
Claims (11)
1. a kind of Carbonate Reservoir two adopts the method for the middle and later periods improving recovery ratio characterized by comprising
According to Carbonate Reservoir, geologic information, oilwell drilling situation and production feature determine Carbonate Reservoir two adopt in after
There are geological types for phase remaining oil；
According to tired production situation, secondary oil recovery method and the failure conditions of oil well, remaining oil preservation mode is judged；And
For the type of different remaining oils, using the different weak water schemes of benefit oil, the type of the remaining oil is deposited by remaining oil
It is limited jointly in geological type and remaining oil preservation mode,
Wherein, the type of remaining oil includes: I type remaining oil, and surface layer emergence karst well group fills the water remaining oil between the well after failure,
II type remaining oil, remaining oil between the well after the water filling of solution cavity more rounds, gas injection failure, type III remaining oil, fractured reservoir oil well are raw
The vertical adjacent upper part of payzone section and adjacent bottom portions remaining oil and IV type remaining oil, the well between fractured reservoir oil well and oil well
Between remaining oil；
Wherein, the scheme of the weak water of benefit oil used for the I type remaining oil is reduction advantage water stream channel, for the II type
The scheme for the weak water of benefit oil that remaining oil uses suppresses water cone to manufacture floating type partition, starts original oil flow channel, for described
The scheme for the weak water of benefit oil that type III remaining oil uses is water filling alternating and needle again after pit shaft Open-Hole Section manufactures crack embolism
The scheme of the weak water of benefit oil used to the IV type remaining oil is card at advantage fissure channel shape change or at aperture change
It is stifled, open new waterflood path；
Wherein, the benefit oil weak water material different for the different weak water Scheme Choices of benefit oil, for selected different material
Material selects different injection technologies.
2. the method according to claim 1, wherein the remaining oil includes: surface layer weathering there are geological type
Shell mould, Caves and slit formation.
3. the method according to claim 1, wherein being used for the weak water of the oil of benefit used by the I type remaining oil
Material are as follows: temperature is 120 DEG C -170 DEG C, salinity is 22 × 104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil
Under the formation condition that water coexists, water-soluble polymer or colloid.
4. the method according to claim 1, wherein being used for the weak water of the oil of benefit used by the II type remaining oil
Material are as follows: temperature is 120 DEG C -170 DEG C, salinity is 22 × 104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil
Under the formation condition that water coexists, it is not soluble in water, insoluble in oil, density between water flooding and crude oil and can soften adhesion,
Or self assembly is in the powdered or particulate material of glassy state.
5. the method according to claim 1, wherein for the weak water of the oil of benefit used by the type III remaining oil
With material are as follows: temperature is 120 DEG C -170 DEG C, salinity is 22 × 104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104mg/L、
It under the formation condition of oil-water coexistence, can be bonded with stratum, pressure-bearing meets high pressure water injection demand and can break the substance of glue or degradation.
6. the method according to claim 1, wherein being used for the weak water of the oil of benefit used by the IV type remaining oil
Material are as follows: temperature is 120 DEG C -170 DEG C, salinity is 22 × 104mg/L、Ca2+And/or Mg2+Concentration is 1 × 104Mg/L, oil
Under the formation condition that water coexists, performance is stable and deformation extent, partial size, oil-water selectivity, density are controllable solid matter.
7. the method according to claim 1, wherein being used for the weak water of the oil of benefit used by the I type remaining oil
Material, injection technology are as follows: control discharge capacity high concentration injection guarantees that the weak water of benefit oil enters remote well with material, avoids pit shaft plastic.
8. the method according to claim 1, wherein being used for the weak water of the oil of benefit used by the II type remaining oil
Material, injection technology are as follows: the injection of small displacement high concentration, it is ensured that the weak water material of benefit oil has sufficient time softening adhesion or realization
Self assembly.
9. the method according to claim 1, wherein for the weak water of the oil of benefit used by the type III remaining oil
With material, injection technology are as follows: the injection of huge discharge high pressure, it is ensured that the benefit weak water material of oil can consolidate or plastic on Open-Hole Section stratum.
10. the method according to claim 1, wherein for the weak water of the oil of benefit used by the IV type remaining oil
With material, injection technology are as follows: huge discharge injects, and is in Duan Sailiu in stratum, the heap G-card at fracture shape change or aperture change
It is stifled.
11. method according to claim 1 or 2, which is characterized in that the secondary oil recovery method further comprises: individual well
Water filling, individual well gas injection, well group water filling and well group gas injection.
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| CN108625833B (en) * | 2018-04-26 | 2020-09-22 | 中国石油化工股份有限公司 | Method for adjusting and improving water drive of fracture-cave carbonate reservoir flow channel |
| CN113309499B (en) * | 2020-02-26 | 2022-07-12 | 中国石油化工股份有限公司 | Agent selection method suitable for flow channel adjustment of different fracture-cavity type reservoirs |
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| CN102339339B (en) * | 2010-07-23 | 2014-01-15 | 中国石油化工股份有限公司 | Method for analyzing remaining oil distribution of fractured-vuggy reservoir |
| CN102146788A (en) * | 2011-03-30 | 2011-08-10 | 中国石油化工股份有限公司 | Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir |
| CN106351624B (en) * | 2015-07-16 | 2018-09-04 | 中国石油化工股份有限公司 | The regulation and control of ultra-high water cut stage fault block oil reservoir subregion improve recovery ratio method |
| CN106640027B (en) * | 2016-09-28 | 2019-05-07 | 中国石油化工股份有限公司 | The construction method of fracture-pore reservoir underground river type karst Reservoir Body space structure well pattern |
| CN106703779A (en) * | 2016-12-02 | 2017-05-24 | 中国石油化工股份有限公司 | Injection-production well pattern construction method suitable for carbonate fractured-cave reservoirs |
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