CN109826600A - A kind of fracture-pore reservoir nitrogen injection oil recovery opportunity preferred method - Google Patents
A kind of fracture-pore reservoir nitrogen injection oil recovery opportunity preferred method Download PDFInfo
- Publication number
- CN109826600A CN109826600A CN201910312964.2A CN201910312964A CN109826600A CN 109826600 A CN109826600 A CN 109826600A CN 201910312964 A CN201910312964 A CN 201910312964A CN 109826600 A CN109826600 A CN 109826600A
- Authority
- CN
- China
- Prior art keywords
- core
- injection
- oil
- fracture
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
A kind of preferred method on fracture-pore reservoir nitrogen injection oil recovery opportunity of the present invention, is related to exploitation of oil-gas field technology, comprising the following steps: (1) be directed to target block, collect oil reservoir initial data and true core；(2) by the oil reservoir initial data logging data acquisition system of collection, the fracture hole type for determining target block is analyzed；(3) core is fitted into high temperature and pressure fracture-pore reservoir simulator the simultaneously fracture hole type of simulated target block, simulate bottom water driving, gas injection dosage, four gas liquid ratio, gas injection speed and bottom water energy conditions are set, nitrogen injection oil recovery experiment is carried out when under the conditions of four of setting in different water cut；(4) recovery ratio increase rate and input-output ratio of the nitrogen injection oil recovery compared to bottom water drive oil recovery, moisture content corresponding to the smallest input and output ratio are calculated, the as optimal nitrogen injection of the target block recovers the oil opportunity.The best gas injection occasion of this method optimization, it is ensured that the economic benefit that target block is optimal.
Description
Technical field
The present invention relates to oil-gas field development technical fields, and in particular to a kind of fracture-pore reservoir nitrogen injection oil recovery opportunity is preferred
Method.
Background technique
Tarim Basin fractured-cavernous carbonate reservoir reservoir heterogeneity is extremely strong, reservoir space is various, medium-and-large-sized hole
Cave is most important reservoir space, and crack is main communicating passage；Oil reservoir oil water relation and fluid flow characteristics are complicated simultaneously,
Cause production decline big, primary recovery rate is lower, and the characteristics of " it is high two to surpass three " of oil reservoir cause other process implementing difficulty it is big,
It is at high cost.For this purpose, coming into effect within 2012 nitrogen injection technology, nitrogen injection technology has become Tahe Oilfield of The Tarim Basin note at present
Substituted technique after water.Practice have shown that gas injection parameter affects gas injection effect, and the selection of gas injection occasion directly determines that gas injection is imitated
The quality of fruit.Gas injection will cause oil reservoir remaining oil distribution confusion, increased costs too early；Gas injection occasion will cause water drive path too late
Crude supply path is suppressed, whole economic efficiency is reduced.How accurately to optimize gas injection occasion is to determine Eor By Gas Injection
Key.
Fracture-pore reservoir will cause bigger error using numerical simulation mode, can not be obtained due to its reservoir structure complexity
True result, it is therefore desirable to conduct a research by simulating lab test.Mainly pass through simulating lab test, numerical simulation at present
The methods of determine gas injection occasion, for example, by fracture-pore reservoir residue oil type be divided into attic oil, remaining oil in cap holes, around
Stream oil, oil film and filling position remaining oil, using the visual compound of two-dimensional visualization physical model and 3 D stereo designed and produced
Reason model (model step on it is imperial, 2016, doctoral thesis, " fractured-cavernous carbonate reservoir Eor By Gas Injection is ground with Related Mechanism
Study carefully "), or using fracture-pore reservoir visualization solution cavity modeling (bend ring etc., naphthology notification, volume 2018,3 the 1st
Phase, " fracture-pore reservoir solution cavity Reservoir Body nitrogen foam drives injection parameter and mechanism study "), to determine that note adopts parameter.
Simulating lab test determines gas injection occasion at present, has the following problems: the oil first is that seam hole structure type loses contact with reality
Hide type, generally by geological model extract or it is similar obtain, it is big with practical reservoir configuration type gap；Second is that using physics mould
Quasi- method cost is relatively high, generally requires the device or visualization device of production high temperature and pressure.In addition, existing interior numerical value
The method for determining gas injection occasion, the general method equivalent using permeability are simulated, while needing to adjust quantity of parameters, it is bothersome to take
Power is detached from on-site actual situations.Therefore, it is necessary to develop, one kind having on-the-spot guidance meaning and easy-to-use gas injection occasion is excellent
Choosing method.
Summary of the invention
It is an object of the invention to overcome to determine that gas injection occasion error is big by mathematical simulation in the prior art, on site
The problem of construction is without reference significance provides a kind of fracture-pore reservoir nitrogen injection oil recovery opportunity preferred method.
The claimed technical solution of the present invention is as follows:
A kind of preferred method on fracture-pore reservoir nitrogen injection oil recovery opportunity, which comprises the following steps:
(1) it is directed to target block, collects oil reservoir initial data and true core；
(2) by the oil reservoir initial data logging data acquisition system of collection, analysis determines the fracture hole of the target block
Type；
(3) core is fitted into high temperature and pressure fracture-pore reservoir simulator to and is simulated the fracture hole type of the target block,
Bottom water driving is simulated, gas injection dosage, four gas liquid ratio, gas injection speed and bottom water energy conditions are set, wherein any three conditions
Be it is quantitative, condition is variable, and nitrogen injection is carried out when under the conditions of four of setting in different water cut and is recovered the oil experiment；
(4) nitrogen injection is calculated to recover the oil compared to the recovery ratio increase rate and input-output ratio of bottom water drive oil recovery, the smallest throwing
Enter moisture content corresponding to output ratio, the as optimal nitrogen injection of the target block recovers the oil opportunity.
In the above method, the oil reservoir initial data includes the individual well data, basic geological data, storage of the target block
Amount report and dynamic data；
The individual well data includes drilling well, well logging, oil recovery, water filling data；The basic geological data includes seismic amplitude
Change rate phasor, geologic body carve diagram data；The reserve report includes oil in place, dynamic holdup；The dynamic data packet
Oil pressure is included, casing pressure, aqueous, tired oil-producing, tired liquid produced, tired produces destiny evidence；
The true core is the Reservoir cores of the target block or the Reservoir cores of close type；
The calculation formula of the input-output ratio are as follows:
Input-output ratio=(gas injection dosage × mark condition stratum conversion factor × side's gas price lattice)/(oil in place × recovery ratio
Increase rate × international oil price × exchange rate × crude oil bucket ton conversion coefficient).
In the above method, note nitrogen is carried out when moisture content is 60%, 70%, 80%, 85%, 90%, 95%, 98% respectively
Gas, which recovers the oil, tests.
In the above method, underground reservoir space size is calculated according to reservoir geology reserves, then according to reservoir space size
Gas injection dosage is set；Gas liquid ratio is calculated according to strata pressure, gas injection water injection equipment rated operating pressure；It is specified according to gas injection equipment
Gas injection speed is arranged in displacement capacity；According to reservoir engineering method calculated result, bottom water energy is set.
In the above method, the high temperature and pressure fracture-pore reservoir simulator includes slit formation core module 16, Caves
Core module 18, space structure self-adjustment module；
The inside of the slit formation core module 16 and Caves core module 18 can accommodate true core；Slit formation core
Between module 16 and slit formation core module 16, between Caves core module 18 and Caves core module 18 or slit formation
It is connected between core module 16 and Caves core module 18 by pipeline；
The space structure self-adjustment module is separately connected slit formation core module 16 and Caves core module 18, uses
In precise positioning core inclination angle and height, solution cavity relative position, fracture width occurrence and fracture hole connected relation are adjusted.
In the above method, the space structure self-adjustment module includes bracket 19, and the bracket 19 is separately connected crack
Type core module 16 and Caves core module 18；The top of the bracket 19 can be rotated around trunnion axis or vertical axis, lower part
Liftable or translation, with precise positioning core inclination angle and position.
In the above method, the high temperature and pressure fracture-pore reservoir simulator further includes confining pressure system 20；The confining pressure system
System 20 connects the slit formation core module 16 and Caves core module 18 by pipeline, for simulating the pressure of superstratum
Power.
In the above method, the slit formation core module 16 includes practical core storehouse 6, the one end in the practical core storehouse 6
For injection end, the other end is output end；Fracture width can be adjusted by practical core storehouse size adjusting block 14；
Preferably, fracture width is adjusted by passing through one group of jackscrew bar of the side wall in practical core storehouse 6, the jackscrew bar packet
Cap containing jackscrew 11, jackscrew sealing rubber ring 12 and jackscrew distance adjust screw thread 13；
Preferably, the pressure monitoring point 5 across the side wall is additionally provided on the side wall in practical core storehouse 6；
Preferably, injection end is configured with injection end compaction plug, and the injection end compaction plug compresses 4 He of plug body by injection end
Injection end compaction plug connector 1 is constituted, and is compressed in the injection end and is provided with injection end compaction plug sealing rubber ring in plug body 4；?
Injection end is also configured with injection end compaction plug clamping nut 2, and injection end outer wall is provided with and 2 phase of injection end compaction plug clamping nut
The screw thread of cooperation, the injection end compaction plug connector 1 pass through from the medium pore of injection end compaction plug clamping nut 2 and reach outside,
The injection end compaction plug clamping nut 2 is for reinforcing the injection end compaction plug；Output end is configured with output end compaction plug, institute
It states output end compaction plug to be made of output end compaction plug end face 7 and the tight plug body 9 of output side pressure, the output end compaction plug end face
The inner cavity in the 7 contact practical core storehouses 6, is provided with output end compaction plug sealant in the tight plug body 9 of the output side pressure
Circle 8 is also configured with output end compaction plug clamping nut 10 at output end, and output end outer wall is provided with to be compressed with output end compaction plug
The screw thread that nut 10 matches, for reinforcing output end compaction plug.
In the above method, the Caves core module 18 includes core cavity inner cylinder 32 and is sleeved in core cavity
Core cavity outer cylinder 33 outside cylinder 32；The both ends of the core cavity inner cylinder 32 are installed by sealing end 27, the sealed end respectively
First 27 surround core cavity 31 with the core cavity inner cylinder 32；One end of the core cavity 31 is injection end, and the other end is
Output end；
Preferably, injection channel 28 is set in the sealing end 27 of injection end, and setting produces in the sealing end 27 at output end
Channel 30 out, the core cavity 31 are in fluid communication with the injection channel 28 and the output channel 30；The sealing end
Jam nut 26 is set with outside 27, the jam nut 26 is fixed on core cavity outer cylinder 33 by housing screw 34, makes to seal
End 27 and core cavity inner cylinder 32 mutually compress on the contact surface；Outside the outer wall and the core cavity of the sealing end 27
Sealing rubber ring 25 is provided between the inner wall of cylinder 33；
Preferably, it on the side wall of core cavity inner cylinder 32 and core cavity outer cylinder 33, is provided through in core cavity
The side wall of cylinder 32 and core cavity outer cylinder 33 simultaneously extends to the acquisition terminal 15 of the temperature, pressure in core cavity 31.
In the above method, the step (3) includes:
Core is put into the slit formation core module and Caves core module of high temperature and pressure fracture-pore reservoir simulator
In, according to fracture hole type determined by step (2), slit formation core module and Caves core module are combined, it is opposite to adjust solution cavity
Position, fracture width occurrence and fracture hole connected relation constitute model；
Whole device is set to be warming up to 120 DEG C；
To model saturated water, saturated oils, saturated oils is gradually forced into 60MPa；
Bottom water drive is simulated, when moisture content of the simulation to quasi- evaluation gas injection effect setting, injects nitrogen；
Bored well 2h, drive a well evaluation, calculates ultimate recovery.
Since reservoir numerical simulation is unable to satisfy fracture-pore reservoir needs, the present invention is using the high temperature for being suitble to fracture-pore reservoir
High pressure fracture-pore reservoir simulator carries out Eor By Gas Injection evaluation, by the oil reservoir initial data of the target block of collection
Data are embodied in one by one in high temperature and pressure fracture-pore reservoir simulator, fully consider different fracture-pore reservoirs, gas injection dosage, gas
The parameters such as liquor ratio, gas injection speed, bottom water energy, establish the relationship of ultimate recovery and input-output ratio, determine optimal gas injection
Opportunity.Gas injection occasion mainly considers the aqueous situation of target block, and oil well block comprehensive water cut is divided into n parts, can specifically be led to
Experimental result statistics is crossed to be divided.Different fracture-pore reservoirs is simulated using high temperature and pressure fracture-pore reservoir simulator, is led to
It crosses and sets different bottom water energy, adjustment gas injection dosage, gas liquid ratio and gas injection speed determine target block under different water cut
Optimal recovery ratio determine optimal gas injection occasion in conjunction with input-output ratio.
Method of the invention simulates true fracture-pore reservoir using high temperature and pressure fracture-pore reservoir simulator, sufficiently studies
The system of parameters such as gas injection dosage, gas liquid ratio, gas injection speed, bottom water energy can be truly reflected target block reservoir gas injection, optimization
Obtained best gas injection occasion can guarantee the economic benefit that target block is optimal in entire Project Process.
High temperature and pressure fracture-pore reservoir simulator used in the present invention is suitable for placing formation condition large scale true
Core can be realized modularization fracture hole independent assortment, and solution cavity relative position, fracture width occurrence, fracture hole connected relation is adjustable.Institute
Computational fluid dynamics 3D monitoring function in certain fracture hole can also be had by stating high temperature and pressure fracture-pore reservoir simulator.Pass through resistance to height
The high pressure resistant sapphire of temperature realizes high temperature and pressure and visualization in conjunction with layering supercharging technology as visual windows.
Science and technology term used in the present invention has the normally understood meaning of those skilled in the art, the scientific skill in part
The meaning of art term is as follows:
The moisture content in oil field refers to using an oil field or production unit as the production water in the moon (year) Liquid output of overall calculation
Shared percentage is measured, to indicate the whole water status in oil field.Under normal circumstances, aqueous 0%~20% is low water-cut stage,
Aqueous 20%~70% is middle water-cut stage, and aqueous 70%~98% is high water cut stage.
The water cut limit that ultimate recovery refers to that oil field loses the economic exploitation value is 98% or limited water to oil ratio is 49
When recovery percent of reserves, the as ultimate recovery in oil field, cumulative oil production at this time be known as the production rate limit in oil field.
Gas liquid ratio refers to the ratio of concurrently injected nitrogen and water.
Bottom water energy refers to the ratio of crude oil reserve volume in natural water body volume ratio.If 160 times of ratio >, being classified as natural
Bottom water energy is sufficient；If it is more sufficient that ratio between 70-160 times, is classified as natural bottom water energy；If ratio is classified as between 10-70 times
With certain natural bottom water energy；If 10 times of ratio <, being classified as having natural bottom water energy deficiency.
Gas injection dosage can refer to that the gas of injection underground takes up an area the multiple of lower total pore size volume, unit PV；
Oil in place refer to according to geological prospecting grasp data, stored according to the energy rule to be formed carry out calculate obtain
Reserves.
Input-output ratio can be calculated according to following formula:
Mark condition stratum conversion factor refers to the volume under the corresponding mark condition of the gas of 1 side under formation condition.
Detailed description of the invention
The flow diagram of fracture-pore reservoir nitrogen injection oil recovery opportunity preferred method Fig. 1 of the invention.
The connection relationship of high temperature and pressure fracture-pore reservoir simulator used in Fig. 2 some embodiments of the present invention is shown
It is intended to.
The slit formation core of high temperature and pressure fracture-pore reservoir simulator used in Fig. 3 some embodiments of the present invention
Module diagram.
The A-A sectional view of Fig. 4 Fig. 3.
The Caves core of high temperature and pressure fracture-pore reservoir simulator used in Fig. 5 some embodiments of the present invention
Module diagram.
Wherein, 1- injection end compaction plug connector, 2- injection end compaction plug clamping nut, 3- injection end compaction plug sealant
Circle, 4- injection end compress plug body, 5- pressure monitoring point, the practical core storehouse 6-, 7- output end compaction plug end face, 8- output side pressure
Tight plug sealing rubber ring, the tight plug body of 9- output side pressure, 10- output end compaction plug clamping nut, 11- jackscrew cap, the sealing of 12- jackscrew
Cushion rubber, 13- jackscrew distance adjust screw thread, the practical core storehouse size adjusting block of 14-, and 15- temperature, pressure acquires terminal, the crack 16-
Type core module, 17- valve, 18- Caves core module, 19- bracket, 20- confining pressure system, 21- gas injection system, 22-
Liquid injection system, 23- bottom water simulation system, 24- export metering system, 25- sealing rubber ring, 26- jam nut, 27- sealing
End, the injection channel 28-, 29- power-assisted hole, 30- output channel, 31- core cavity, 32- core cavity inner cylinder, 33- core chamber
External cylinder, 34- housing screw.
Specific embodiment
Below with reference to embodiment, the present invention is further explained, it should be understood that and following embodiments are only used as explanation and illustration,
It is not used in and limits the scope of the invention.
In following embodiments, used technological means is unless otherwise specified conventional technical means in the art；Institute
The reagent used can be obtained through commercial channels unless otherwise specified, or prepared and obtained according to routine experiment method；Institute
The instrument and software used can be obtained through commercial channels unless otherwise specified.
The nitrogen injection oil recovery opportunity of embodiment 1.TH1# individual well is preferred
For the TH1# individual well that, flood effectiveness good by connectivity is deteriorated, the preferred of nitrogen injection oil recovery opportunity is carried out.
TH1# individual well spuds on October 5th, 1999, finishing drilling well depth 5800m, hawk mountain group of uniting under the Ordovician system of finishing drilling layer position.2000
Year May, perforations adding 5468-5480m, setting 5409.77m, May 12 acid fracturing together with 5622-5634m, max. pump pressure
73.8MPa, maximum pump discharge 4.24m3/ min, into stratum 340.3m3, wherein viscous acid 200.6m3, termination of pumping pressure 19.1Mpa,
The row of returning 240m3See oil bloom, the row of returning 396.3m3After see oil, initial stage, 9mm entered the station, oil pressure 4Mpa, casing pressure 5MPa, day oil-producing 96-100t,
It is substantially free of water.
TH1# single well geological reserve 20.4 × 104T, recoverable reserves 14.5 × 104t。
Experiment oil: system in Tahe Oilfield is dehydrated degassed crude, and viscosity is 23.9mPa.s at 45 DEG C.
Experimental water: water flooding, salinity 200000mg/L, viscosity is 0.93mPa.s at 45 DEG C, and density is
1.032g/mL。
Experiment condition: experimental temperature is 120 DEG C；Experimental pressure is 60MPa.
Experimental provision: by high temperature and pressure fracture-pore reservoir simulator, gas injection system 21, liquid injection system 22,
Bottom water simulation system 23, outlet metering system 24, data collection system composition.
High temperature and pressure fracture-pore reservoir simulator: as shown in Fig. 2, including slit formation core module 16, Caves core
Module 18, space structure self-adjustment module.
The inner space of the slit formation core module 16 and Caves core module 18 is practical core storehouse, can be accommodated true
Real core；Between slit formation core module 16 and slit formation core module 16, Caves core module 18 and Caves core mould
It is connected between block 18 or by pipeline between slit formation core module 16 and Caves core module 18, valve is set on pipeline
17。
16 internal specifications of slit formation core module are long 300mm, width 50mm, high 50mm；Slit width 0-10mm is adjustable；Displacement pressure
Power 60MPa, ring press 80MPa；0-150 DEG C of operating temperature.Such as Fig. 3, slit formation core module 16 includes practical core storehouse 6；It is described
It is provided with practical core storehouse size adjusting block 14 (Fig. 4) in practical core storehouse 6, cylinder can be clamped or plate core, adjusting are split
Slit width degree realizes core closure, open function, and to meet fracture hole connected relation adjustable；Fracture width is real especially by passing through
One group of jackscrew bar of the side wall in border core storehouse 6 is adjusted, the jackscrew bar include jackscrew cap 11, jackscrew sealing rubber ring 12 and jackscrew away from
From adjusting screw thread 13；Preferably, the pressure monitoring point 5 across the side wall is additionally provided on the side wall in practical core storehouse 6.
The one end in the practical core storehouse 6 is injection end, and the other end is output end.
Wherein injection end is configured with injection end compaction plug, and the injection end compaction plug compresses plug body 4 and note by injection end
Enter to hold compaction plug connector 1 to constitute, is compressed in the injection end and be provided with injection end compaction plug sealing rubber ring 3 in plug body 4；It is infusing
Enter end and be also configured with injection end compaction plug clamping nut 2, injection end outer wall is provided with to match with injection end compaction plug clamping nut 2
The screw thread of conjunction, the injection end compaction plug connector 1 pass through from the medium pore of injection end compaction plug clamping nut 2 and reach outside, institute
Injection end compaction plug clamping nut 2 is stated for reinforcing the injection end compaction plug；Output end is configured with output end compaction plug, described
Output end compaction plug is made of output end compaction plug end face 7 and the tight plug body 9 of output side pressure, the output end compaction plug end face 7
The inner cavity for contacting the practical core storehouse 6 is provided with output end compaction plug sealing rubber ring in the tight plug body 9 of the output side pressure
8, it is also configured with output end compaction plug clamping nut 10 at output end, output end outer wall, which is provided with, compresses spiral shell with output end compaction plug
The screw thread that cap 10 matches, for reinforcing output end compaction plug.
It is 100mm that Caves core inside modules specification, which is diameter, a height of 500mm；Displacement pressure 35MPa, ring pressure
50MPa；0-150 DEG C of operating temperature.As shown in figure 5, Caves core module 18 includes core cavity inner cylinder 32 and is sleeved on
Core cavity outer cylinder 33 outside core cavity inner cylinder 32；The both ends of the core cavity inner cylinder 32 are equipped with sealing end 27, institute
It states sealing end 27 and the core cavity inner cylinder 32 surrounds core cavity 31；One end of the core cavity 31 is injection end,
The other end is output end；
Injection channel 28 is wherein set in the sealing end 27 of injection end, and setting output is logical in the sealing end 27 at output end
Road 30, the core cavity 31 are in fluid communication with the injection channel 28 and the output channel 30；Outside the sealing end 27
It is set with jam nut 26, the jam nut 26 is fixed on core cavity outer cylinder 33 by housing screw 34, makes to seal end
27 and core cavity inner cylinder 32 mutually compress on the contact surface；The outer wall and the core cavity outer cylinder 33 of the sealing end 27
Inner wall between be provided with sealing rubber ring 25；
On the side wall of core cavity inner cylinder 32 and core cavity outer cylinder 33, it is provided through core cavity inner cylinder 32 and rock
The side wall of the external cylinder 33 of core cavity simultaneously extends to the acquisition terminal 15 of the temperature, pressure in core cavity 31.
The space structure self-adjustment module is separately connected slit formation core module 16 and Caves core module 18, and
Computer is connected by data line, intelligentized control method is carried out according to seismic data by computer, it can be with precise positioning core inclination angle
With position (height), realize that solution cavity relative position, fracture width occurrence, fracture hole connected relation is adjustable.
The space structure self-adjustment module includes bracket 19, and each bracket 19 includes upper and lower two parts, and lower part is used for
Vertical lift height, top can arbitrarily rotate within the scope of -60 ° -60 ° along trunnion axis, while can be along vertical direction 360
Degree rotation, realizes any adjustment.In a preferred embodiment, the space structure self-adjustment module includes 6 brackets 19, each
The height of bracket 19 is 1200mm.
Use can be freely combined in slit formation core module 16, Caves core module 18, can also independently use.Confining pressure system
System 20 connects slit formation core module 16 and Caves core module 18 by pipeline, for simulating the pressure of superstratum.Institute
It states confining pressure system to control by computer, core closure, open function may be implemented, and to meet fracture hole connected relation adjustable.
High temperature and pressure fracture-pore reservoir simulator (can not also be shown including computational fluid dynamics 3D monitoring modular in fracture hole in figure
Show), it realizes that computer display oil, gas and water are distributed by data acquisition and control system, realizes visualization function.
The high temperature and pressure fracture-pore reservoir simulator passes through three dimensional seismic data, automatic collection and adjusting fracture hole type storage
Each coring module position is controlled in layer simulation system, realizes that solution cavity relative position, fracture width occurrence, fracture hole connected relation are automatic
It is adjustable, it is ensured that the authenticity of simulation, while what is used is all the true core of large scale, avoids artificial design factor.
Gas injection system 21 and liquid injection system 22: if among comprising the dry piston equipped with crude oil, water flooding etc.
Container, constant pressure constant speed metering pump, high-purity N2Bottle, valve.Piston type intermediate receptacle capacity is 2L, operating pressure 2MPa.Constant pressure
Constant speed metering pump operating pressure is 30MPa, flow rates 0.01-9.99mL/min；High-purity N2Purity is 99.9%.The system
Connect by pipeline and valve with the injection end of high temperature and pressure fracture-pore reservoir simulator, can be provided for model saturated water,
Saturated oils power.
Bottom water simulation system 23: including bottom water container, constant pressure constant speed metering pump, valve.The system passes through pipeline and valve
It is connect with the bottom well of high temperature and pressure fracture-pore reservoir simulator, for providing bottom water driving force.
It exports metering system 24: including back-pressure valve, backpressure pump, back pressure container, gas-liquid separator, gas-metering device, electricity
Sub- balance composition.The system is connect by outlet line and valve with the outlet end of high temperature and pressure fracture-pore reservoir simulator,
For measuring production fluid, output gas.
Data collection system: including computer, differential pressure pickup.The system is separately connected high temperature and pressure seam by data line
Hole type reservoir simulator, gas/liquid injected system 21,22, bottom water simulation system 23 and the movement for exporting metering system 24
Element, for model construction, control simulated experiment and storage and processing data.
Nitrogen injection oil recovery opportunity preferred method:
S1. the oil reservoir initial data of TH1# individual well is collected, including individual well data, basic geological data, reserve report and dynamic
The core of state data and TH1# individual well；
The individual well data includes drilling well, well logging, oil recovery and water filling data, can be obtained by historical query, for dividing
Analyse individual well reservoir structure, fluid supply capacity, gettering ability and gas injection potentiality；The basic geological data includes seismic amplitude variation
Rate phasor, geologic body carve diagram data, are analyzed and processed by landmark software to geologic information, can restore actual seam
Hole structure；The reserve report includes oil in place, dynamic holdup, can be obtained, is used for by common reservoir engineering method
It analyzes oil well gas injection potentiality and calculates input-output ratio；The dynamic data includes oil pressure, casing pressure, aqueous, tired oil-producing, tired produces liquid
It with tired production destiny evidence, can be obtained by historical query, for analyzing oil well current state and oil well gas injection potentiality；The core
For true core, for simulating true seam hole structure.
S2. by the data of collection logging data acquisition system one by one.The oil reservoir for analyzing TH1# individual well by computer is original
Data determine the fracture hole type of TH1# individual well.According to the fracture hole type that computer determines, the core of TH1# individual well is packed into high temperature and pressure
In the slit formation module and Caves module of fracture-pore reservoir simulator.
The TH1# individual well fracture hole model of this experiment simulation, parameter setting are as follows:
| Form | Size | Number |
| Solution cavity | 3-5cm | 3 |
| Seam | 0.1cm | 10 (for connecting 3 solution cavities) |
| Hole | 0.2cm | 0 |
S3., different bottom water energy, gas injection dosage, gas liquid ratio (nitrogen and water), gas injection speed are set, using continuous gas injection
Mode carry out simulation gas injection experiment.Displacement test is controlled by high temperature and pressure displacement of reservoir oil analog data acquisition processing software
System, the parameters such as main temperature collection, pressure, injected gas volume, injected water volume, Liquid output, gas production.
Bottom water energy: it is arranged according to reservoir engineering method calculated result；
Gas injection dosage: calculating underground reservoir space size according to reservoir geology reserves, then according to reservoir space size, if
Set gas injection dosage；
Gas liquid ratio (nitrogen and water): according to strata pressure, gas injection water injection equipment rated operating pressure, gas liquid ratio is calculated；
Gas injection speed: according to gas injection equipment rated discharge ability, gas injection speed is set.
Bottom water drive control group
1. opening software, systems inspection and test, whether check device is complete, connects whether correct, each device work shape
State and reliability.
2. practical core is put into high temperature and pressure module, according to identified individual well fracture hole type, combine solution cavity module and
Crack module adjusts solution cavity relative position, fracture width occurrence and fracture hole connected relation, constitutes model；
3. whole device is warming up to 120 DEG C；
4. to model saturated water, saturated oils, saturated oils is gradually forced into 60MPa；
5. bottom water drive is simulated, until aqueous 100%, after aqueous and continuous production 1PV or more.
Nitrogen flooding experimental group (is specifically shown in experimental group 1-4)
Step 1. -4. with bottom water drive control group；
5. simulating bottom water drive, when water-retention value of the simulation to quasi- evaluation gas injection effect setting, nitrogen is injected.
6. bored well 2h, drive a well evaluation, ultimate recovery is calculated.
When injecting nitrogen, three parameters in bottom water energy, gas injection dosage, gas liquid ratio, gas injection speed are set as quantitative, are changed
Become the value of another parameter, obtains the ultimate recovery of gas-injection oil-production under different water cut.
Experiment with computing group recovery ratio increase rate compared with the control group and input-output ratio.
Statistical experiment result data, moisture content corresponding to the smallest input and output ratio, as best gas injection occasion.
Experimental group 1
It is quantitative: setting gas injection dosage 0.04PV, gas injection speed 140000m3/ d, gas liquid ratio the 400:1 (ratio of nitrogen and water
Example, unit m3/m3)。
Variable: bottom water energy is set to 200 times, 180 times and 160 times.
Data statistics: oil well block composite water cut is divided into 60% according to experimental result, 70%, 80%, 85%,
90%, 95%, 98%, calculate recovery ratio increase rate and input-output ratio corresponding to TH1# individual well different water cut.It is described
Recovery ratio increase rate refers to: compared with the control group, recovery ratio improves ratio.
The moisture content and its corresponding recovery ratio increase rate of 1 experimental group 1 of table
Note: gas injection volume=oil in place × gas injection dosage.
The input-output ratio of 2 experimental group 1 of table
Note: oil increment=oil in place × recovery ratio increase rate；Oil draining rate=oil increment/gas injection volume；Gas injection cost
=gas injection volume × every side nitrogen price/10000；Crude oil price=international oil price (50 dollar/barrel) × exchange rate (6.7) × 7
Bucket；Increase oily output=oil increment × crude oil price/10000；Input-output ratio=gas injection cost/increasing oil output.Input-output ratio
=(gas injection dosage × oil in place × every side nitrogen price)/(oil in place × raising recovery ratio amplitude × international oil price × remittance
Rate × crude oil bucket ton conversion coefficient).
As it can be seen from table 1 carrying out gas-injection oil-production under different moisture content, recovery ratio increase rate is different.According to table 1
With the data of table 2 it is found that the earning rate highest of experiment 1-18, input-output ratio 1:11.84, corresponding moisture content are
85%, thus experimental group 1 screen the individual well gas injection best opportunity be moisture content 85% when.
Experimental group 2
It is quantitative: 180 times of bottom water energy of setting, gas injection speed 140000m3/ d, gas liquid ratio 400:1 (ratio of nitrogen and water,
Unit m3/m3)。
Variable: gas injection dosage is set to 0.02PV, 0.04PV and 0.06PV.
Data statistical approach is the same as experimental group 1.
The moisture content and its corresponding recovery ratio increase rate of 3 experimental group 2 of table
The input-output ratio of 4 experimental group 2 of table
According to the data of table 3 and table 4 it is found that the earning rate highest of experiment 2-4, input-output ratio 1:13.03 are corresponding
Moisture content be 85%, therefore experimental group 2 screen the individual well gas injection best opportunity be moisture content 85% when.
Experimental group 3
It is quantitative: setting gas injection dosage 0.04PV, gas injection speed 140000m3/ d, 180 times of bottom water energy.
Variable: gas liquid ratio is set to 200:1,400:1 and 600:1, refers to the ratio of nitrogen and water, unit m3/m3。
Data statistical approach is the same as experimental group 1.
The moisture content and its corresponding recovery ratio increase rate of 5 experimental group 3 of table
The input-output ratio of 6 experimental group 3 of table
According to the data of table 5 and table 6 it is found that the earning rate highest of experiment 3-10, input-output ratio 1:11.3 are corresponding
Moisture content be 80%, therefore experimental group 3 screen the individual well gas injection best opportunity be moisture content 80% when.
Experimental group 4
It is quantitative: 180 times of bottom water energy of setting, gas injection dosage 0.04PV, gas liquid ratio 400:1 (ratio of nitrogen and water, unit
m3/m3)。
Variable: gas injection speed is set to 100000m3/ d, 140000m3/ d and 180000m3/d。
Data statistical approach is the same as experimental group 1.
The moisture content and its corresponding recovery ratio increase rate of 7 experimental group 4 of table
The input-output ratio of 8 experimental group 4 of table
According to the data of table 7 and table 8 it is found that the earning rate highest of experiment 4-18, input-output ratio 1:11.6 are corresponding
Moisture content be 85%, therefore experimental group 3 screen the individual well gas injection best opportunity be moisture content 85% when.
By repeating to test, the highest input-output ratio finally counted is 1:13.03, and corresponding moisture content is 85%,
It is the best nitrogen injection oil recovery opportunity of TH1# individual well when i.e. moisture content is 85%.
Above-mentioned experimental result is applied in the practical exploitation of TH1# individual well, the results showed that TH1# individual well, in May, 2012
21 aqueous to reach 85%, designs gas injection rate 0.02PV, conversion to mark condition is 134 × 104m3, -11 days on the 1st June in 2012, day
Gas injection rate 15 × 104m3, add up injection gas 135 × 104m3, bored well is after 10 days, and drive a well on June 21st, 2012 evaluation, day oil-producing
25t, lasts on October 12nd, 2,013 100% High water cut again add up to increase oil 6214t, remarkable in economical benefits.
Claims (10)
- The preferred method on opportunity 1. a kind of fracture-pore reservoir nitrogen injection recovers the oil, which comprises the following steps:(1) it is directed to target block, collects oil reservoir initial data and true core；(2) by the oil reservoir initial data logging data acquisition system of collection, analysis determines the fracture hole type of the target block；(3) core is fitted into high temperature and pressure fracture-pore reservoir simulator to and is simulated the fracture hole type of the target block, is simulated Bottom water driving, sets gas injection dosage, four gas liquid ratio, gas injection speed and bottom water energy conditions, wherein any three conditions are fixed Amount, a condition are variable, and nitrogen injection oil recovery experiment is carried out when under the conditions of four of setting in different water cut；(4) it calculates nitrogen injection to recover the oil compared to the recovery ratio increase rate and input-output ratio of bottom water drive oil recovery, the smallest investment produces The optimal nitrogen injection of moisture content corresponding to ratio out, the as target block recovers the oil opportunity.
- 2. the method according to claim 1, wherein the oil reservoir initial data includes the list of the target block Well data, basic geological data, reserve report and dynamic data；The individual well data includes drilling well, well logging, oil recovery, water filling data；The basic geological data includes seismic amplitude variation Rate phasor, geologic body carve diagram data；The reserve report includes oil in place, dynamic holdup；The dynamic data includes oil Pressure, aqueous, tired oil-producing, tired produce liquid, tired produces destiny evidence casing pressure；The true core is the Reservoir cores of the target block or the Reservoir cores of close type；The calculation formula of the input-output ratio are as follows:Input-output ratio=(gas injection dosage × mark condition stratum conversion factor × side's gas price lattice)/(oil in place × recovery ratio improves Amplitude × international oil price × exchange rate × crude oil bucket ton conversion coefficient).
- 3. the method according to claim 1, wherein respectively moisture content be 60%, 70%, 80%, 85%, 90%, 95%, 98% when carry out nitrogen injection recover the oil experiment.
- 4. the method according to claim 1, whereinUnderground reservoir space size is calculated according to reservoir geology reserves, gas injection dosage is then arranged according to reservoir space size；Gas liquid ratio is calculated according to strata pressure, gas injection water injection equipment rated operating pressure；According to gas injection equipment rated discharge capabilities setting gas injection speed；According to reservoir engineering method calculated result, bottom water energy is set.
- 5. the method according to claim 1, wherein the high temperature and pressure fracture-pore reservoir simulator includes splitting Seam type core module (16), Caves core module (18), space structure self-adjustment module；The inside of the slit formation core module (16) and Caves core module (18) can accommodate true core；Slit formation core Between module (16) and slit formation core module (16), between Caves core module (18) and Caves core module (18), Or it is connect between slit formation core module (16) and Caves core module (18) by pipeline；The space structure self-adjustment module is separately connected slit formation core module (16) and Caves core module (18), uses In precise positioning core inclination angle and height, solution cavity relative position, fracture width occurrence and fracture hole connected relation are adjusted.
- 6. according to the method described in claim 5, it is characterized in that, the space structure self-adjustment module includes bracket (19), the bracket (19) is separately connected slit formation core module (16) and Caves core module (18)；The bracket (19) Top can be rotated around trunnion axis or vertical axis, lower part liftable or translation, with precise positioning core inclination angle and position.
- 7. according to the method described in claim 6, it is characterized in that, the high temperature and pressure fracture-pore reservoir simulator further includes Confining pressure system (20)；The confining pressure system (20) connects the slit formation core module (16) and Caves core mould by pipeline Block (18), for simulating the pressure of superstratum.
- 8. according to the method described in claim 5, it is characterized in that, the slit formation core module (16) includes practical core storehouse (6), one end of the practical core storehouse (6) is injection end, and the other end is output end；Fracture width can be by practical core storehouse size Adjusting block (14) is adjusted；Preferably, fracture width is adjusted by passing through one group of jackscrew bar of the side wall of practical core storehouse (6), and the jackscrew bar includes Jackscrew cap (11), jackscrew sealing rubber ring (12) and jackscrew distance adjust screw thread (13)；Preferably, the pressure monitoring point (5) across the side wall is additionally provided on the side wall of practical core storehouse (6)；Preferably, injection end is configured with injection end compaction plug, and the injection end compaction plug is compressed plug body (4) by injection end and infused Enter to hold compaction plug connector (1) to constitute, is compressed in the injection end and be provided with injection end compaction plug sealing rubber ring on plug body (4)； It is also configured with injection end compaction plug clamping nut (2) in injection end, injection end outer wall, which is provided with, compresses spiral shell with injection end compaction plug The screw thread that cap (2) matches, the injection end compaction plug connector (1) are worn from the medium pore of injection end compaction plug clamping nut (2) It crosses and reaches outside, the injection end compaction plug clamping nut (2) is for reinforcing the injection end compaction plug；Output end is configured with production Outlet compaction plug, output end compaction plug are made of output end compaction plug end face (7) and the tight plug body of output side pressure (9), institute The inner cavity that output end compaction plug end face (7) contacts the practical core storehouse (6) is stated, on the tight plug body of output side pressure (9) It is provided with output end compaction plug sealing rubber ring (8), is also configured with output end compaction plug clamping nut (10), output end at output end Outer wall is provided with the screw thread matched with output end compaction plug clamping nut (10), for reinforcing output end compaction plug.
- 9. according to the method described in claim 5, it is characterized in that, the Caves core module (18) includes in core cavity Cylinder and is sleeved on the core cavity outer cylinder (33) of core cavity inner cylinder (32) outside at (32)；The two of the core cavity inner cylinder (32) End installation sealing end (27) respectively, the sealing end (27) and the core cavity inner cylinder (32) surround core cavity (31)；One end of the core cavity (31) is injection end, and the other end is output end；Preferably, injection channel (28) are set in the sealing end (27) of injection end, setting in the sealing end (27) at output end Output channel (30), the core cavity (31) and the injection channel (28) and the output channel (30) are in fluid communication；Institute It states sealing end (27) and is set with jam nut (26) outside, the jam nut (26) is fixed on core chamber by housing screw (34) On external cylinder (33), makes to seal end (27) and core cavity inner cylinder (32) mutually compresses on the contact surface；The sealing end (27) sealing rubber ring (25) are provided between the inner wall of outer wall and the core cavity outer cylinder (33)；Preferably, it on the side wall of core cavity inner cylinder (32) and core cavity outer cylinder (33), is provided through in core cavity The side wall of cylinder (32) and core cavity outer cylinder (33) simultaneously extends to the acquisition of the temperature, pressure in core cavity (31) terminal (15).
- 10. -9 any method according to claim 1, which is characterized in that the step (3) includes:Core is put into the slit formation core module and Caves core module of high temperature and pressure fracture-pore reservoir simulator, is pressed According to fracture hole type determined by step (2), combination slit formation core module and Caves core module, adjusting solution cavity relative position, Fracture width occurrence and fracture hole connected relation constitute model；Whole device is set to be warming up to 120 DEG C；To model saturated water, saturated oils, saturated oils is gradually forced into 60MPa；Bottom water drive is simulated, when moisture content of the simulation to quasi- evaluation gas injection effect setting, injects nitrogen；Bored well 2h, drive a well evaluation, calculates ultimate recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312964.2A CN109826600B (en) | 2019-04-18 | 2019-04-18 | Method for optimizing nitrogen injection oil extraction time of fracture-cavity oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312964.2A CN109826600B (en) | 2019-04-18 | 2019-04-18 | Method for optimizing nitrogen injection oil extraction time of fracture-cavity oil reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109826600A true CN109826600A (en) | 2019-05-31 |
| CN109826600B CN109826600B (en) | 2019-12-06 |
Family
ID=66875739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910312964.2A Active CN109826600B (en) | 2019-04-18 | 2019-04-18 | Method for optimizing nitrogen injection oil extraction time of fracture-cavity oil reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109826600B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396003A (en) * | 2020-05-15 | 2020-07-10 | 中国石油天然气集团有限公司 | Method for adjusting drainage test oil nozzle after fracturing of normal-pressure shale gas horizontal well |
| CN111396005A (en) * | 2020-06-02 | 2020-07-10 | 中国石油大学(华东) | Treatment method of nitrogen-injected thickened well of fracture-cavity type thickened oil reservoir |
| CN111396006A (en) * | 2020-06-02 | 2020-07-10 | 中国石油大学(华东) | Treatment method for thickening extra-heavy oil solution-cavity type oil reservoir by injecting nitrogen into crude oil |
| CN111879674A (en) * | 2020-07-15 | 2020-11-03 | 西南石油大学 | Testing device and method for determining reasonable well closing time based on shale imbibition permeability |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006094669A1 (en) * | 2005-03-04 | 2006-09-14 | Services Petroliers Schlumberger | Method and apparatus for measuring the flow rates of the individual phases of a multiphase fluid mixture |
| WO2007134747A1 (en) * | 2006-05-19 | 2007-11-29 | Eni S.P.A. | Testing process for zero emission hydrocarbon wells |
| CN102900408A (en) * | 2012-10-15 | 2013-01-30 | 西南石油大学 | Experimental evaluation method of gas-injection displaceable oil of fracture-cave type carbonate reservoir |
| CN104727788A (en) * | 2015-02-06 | 2015-06-24 | 西南石油大学 | Three-dimensional single-well gas injection oil replacement simulation experiment device for fracture-cavity reservoir |
| CN104747180A (en) * | 2014-02-26 | 2015-07-01 | 中国石油化工股份有限公司 | Fracture-cavity type oil deposit analyzing method for water-flooding development and application thereof |
| CN104790926A (en) * | 2015-03-20 | 2015-07-22 | 中国石油大学(北京) | Fracture-vug type oil reservoir water-flooding development effect evaluation method |
| CN105089657A (en) * | 2015-06-15 | 2015-11-25 | 中国石油天然气股份有限公司 | Physical simulation method and physical simulation experimental device for oil and gas charging of fracture-cave carbonate reservoir |
| CN107461193A (en) * | 2017-07-12 | 2017-12-12 | 西南石油大学 | Fracture and vug carbonate reservoir displacement physics model group closes method and experimental provision |
| CN107725042A (en) * | 2017-09-13 | 2018-02-23 | 中国石油大学(北京) | A kind of large-scale fracture and vug carbonate reservoir physical simulation experiment device of HTHP and method |
-
2019
- 2019-04-18 CN CN201910312964.2A patent/CN109826600B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006094669A1 (en) * | 2005-03-04 | 2006-09-14 | Services Petroliers Schlumberger | Method and apparatus for measuring the flow rates of the individual phases of a multiphase fluid mixture |
| WO2007134747A1 (en) * | 2006-05-19 | 2007-11-29 | Eni S.P.A. | Testing process for zero emission hydrocarbon wells |
| CN102900408A (en) * | 2012-10-15 | 2013-01-30 | 西南石油大学 | Experimental evaluation method of gas-injection displaceable oil of fracture-cave type carbonate reservoir |
| CN104747180A (en) * | 2014-02-26 | 2015-07-01 | 中国石油化工股份有限公司 | Fracture-cavity type oil deposit analyzing method for water-flooding development and application thereof |
| CN104727788A (en) * | 2015-02-06 | 2015-06-24 | 西南石油大学 | Three-dimensional single-well gas injection oil replacement simulation experiment device for fracture-cavity reservoir |
| CN104790926A (en) * | 2015-03-20 | 2015-07-22 | 中国石油大学(北京) | Fracture-vug type oil reservoir water-flooding development effect evaluation method |
| CN105089657A (en) * | 2015-06-15 | 2015-11-25 | 中国石油天然气股份有限公司 | Physical simulation method and physical simulation experimental device for oil and gas charging of fracture-cave carbonate reservoir |
| CN107461193A (en) * | 2017-07-12 | 2017-12-12 | 西南石油大学 | Fracture and vug carbonate reservoir displacement physics model group closes method and experimental provision |
| CN107725042A (en) * | 2017-09-13 | 2018-02-23 | 中国石油大学(北京) | A kind of large-scale fracture and vug carbonate reservoir physical simulation experiment device of HTHP and method |
Non-Patent Citations (3)
| Title |
|---|
| 张明明: "塔河缝洞型碳酸盐岩油藏注气方式及技术政策研究", 《中国知网硕士论文数据库》 * |
| 王建海等: "塔河缝洞型油藏注氮气工艺参数优化研究", 《断块油气田》 * |
| 赵冰冰等: "缝洞型油藏注氮气吞吐影响因素研究", 《长江大学学报（自然版）》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396003A (en) * | 2020-05-15 | 2020-07-10 | 中国石油天然气集团有限公司 | Method for adjusting drainage test oil nozzle after fracturing of normal-pressure shale gas horizontal well |
| CN111396003B (en) * | 2020-05-15 | 2022-03-15 | 中国石油天然气集团有限公司 | Method for adjusting drainage test oil nozzle after fracturing of normal-pressure shale gas horizontal well |
| CN111396005A (en) * | 2020-06-02 | 2020-07-10 | 中国石油大学(华东) | Treatment method of nitrogen-injected thickened well of fracture-cavity type thickened oil reservoir |
| CN111396006A (en) * | 2020-06-02 | 2020-07-10 | 中国石油大学(华东) | Treatment method for thickening extra-heavy oil solution-cavity type oil reservoir by injecting nitrogen into crude oil |
| CN111879674A (en) * | 2020-07-15 | 2020-11-03 | 西南石油大学 | Testing device and method for determining reasonable well closing time based on shale imbibition permeability |
| CN111879674B (en) * | 2020-07-15 | 2022-02-01 | 西南石油大学 | Testing device and method for determining reasonable well closing time based on shale imbibition permeability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109826600B (en) | 2019-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109826600A (en) | A kind of fracture-pore reservoir nitrogen injection oil recovery opportunity preferred method | |
| CN105735965B (en) | Coal bed gas well pit shaft internal drainage gas production visual Simulation experimental provision and analogy method | |
| CN104747180B (en) | A kind of fracture-pore reservoir for waterflooding extraction analyzes method and application thereof | |
| CN103174412B (en) | A kind of coalbed methane reservoir layering is with adopting HTHP mining dynamic evaluation instrument | |
| CN103148888B (en) | A kind of coalbed methane reservoir bilayer closes adopts High Temperature High Pressure mining dynamic estimation system | |
| CN105464652A (en) | Dynamic reserve calculation method and system for fracture and cave type carbonatite oil reservoir fracture and cave unit | |
| CN104989369A (en) | High-flow-rate underground oil-water separation and annular space testing and regulating system | |
| CN103437746A (en) | Volume fracturing method for multiple cracks in multiple sections of horizontal well | |
| CN109519156A (en) | A kind of side water sand rock gas reservoir water drive section model Seepage Experiment method | |
| CN105043949B (en) | Coal dust output analogue experiment installation and method in a kind of vertical bore | |
| CN106499370A (en) | Well group synchronization dispensing divides each interval Liquid output computational methods of the separate-zone producer that adopts and device | |
| CN106593422A (en) | Storage type test method and pipe column in horizontal well oil pipe | |
| CN103670350A (en) | Variable intensity water injection exploitation method for carbonate fracture-cavity oil reservoir | |
| CN104406895A (en) | Novel coal bed permeability testing device and method | |
| CN109763798A (en) | A kind of downhole intelligent injection well downhole flow regulator and its control method | |
| CN204327083U (en) | A kind of diversion chamber of gas test compact reservoir seam net flow conductivity | |
| CN107939380A (en) | A kind of directional well fracture pressure well logging determines method | |
| CN109751020A (en) | A kind of horizontal well intelligence seperated layer water injection and separate-layer production string and process | |
| CN107130955B (en) | Method for determining bottom hole flowing pressure and method for determining natural energy of reservoir | |
| CN111577236B (en) | Multi-section fracturing seepage simulation device for compact oil reservoir horizontal well | |
| CN106640021A (en) | Calculating method and device for post-fracture blow-off parameters | |
| CN104948149A (en) | Multi-media separated injection system suitable for mine field complex oil reservoir | |
| CN101800000B (en) | Natural gas exploitation simulator of multi-angle horizontal branch well | |
| CN205477589U (en) | Visual simulation experiment device of water pumping gas production in gas well pit shaft of coal seam | |
| CN107178357B (en) | Fracture and vug carbonate reservoir water and oil control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |