CN107143312B - Fracture and vug carbonate reservoir energy self-balancing development approach - Google Patents
Fracture and vug carbonate reservoir energy self-balancing development approach Download PDFInfo
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- CN107143312B CN107143312B CN201710468664.4A CN201710468664A CN107143312B CN 107143312 B CN107143312 B CN 107143312B CN 201710468664 A CN201710468664 A CN 201710468664A CN 107143312 B CN107143312 B CN 107143312B
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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
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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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
Abstract
The invention discloses a kind of fracture and vug carbonate reservoir energy self-balancing development approaches, this method comprises: the capacity volume variance situation in analysis fracture-cavity units between well group, determines target well group；Identify and portray the seam hole structure of target well group；The static connectivity structure between target well group is divided, and the verifying of dynamic connectivity relationship is carried out to the static connectivity structure of target well group, establishes the fracture hole connectivity structure between target well group；Utilize the weak part between connectivity relationship detection target well group；It is worked out measures in weak part to link up target well group, and the energy balance between goal of regulation and control well group.The oil reservoir energy self-balancing development approach that the present invention guides the stratum energy of high-energy well group by establishing new well as low energy well group supplement energy, to improve the producing level of oil reservoir natural energy, and reduce artificial control water and supplement the cost of energy, to realize scientific development.Meanwhile this method is used for field practice, it is easy to spread.
Description
Technical field
The present invention relates to technical field of oil production engineering, and in particular to a kind of fracture and vug carbonate reservoir energy self-balancing is opened
Forwarding method.
Background technique
Fracture and vug carbonate reservoir reservoir space is solution cavity, the interrelated complicated knot combined of dissolution pore and crack
Structure body, horizontal and vertical heterogeneity are extremely strong.It is higher to the fining requirement of development technique as exploitation gradually carries out, therefore
The concept of fracture-cavity units is proposed, i.e., in Carbonate Reservoir, around by relatively compact or poor permeability barriers (body)
It blocks, with corrosion interface or is fractured into boundary, mutually ganged up by fracture network, the fluid communication body being composed of hole, hole.So
And it is poor between the even different oil wells of different well groups to show production feature during actual development, in same fracture-cavity units
It is different, and the factor for causing production feature difference critically important is stratum energy difference.
The prior art is both for single problem individual well special administration, the not measure of comprehensive treatment.Energy keeps journey
Higher unit or well group are spent, water body scale is big and energy is sufficient, and the development features for producing the later period are edge-bottom water gradually water
It invades, eventually leads to oil well High water cut without oil production.For the development of this edge-bottom water, the oil well of Qiang Nengliang, restore after middle High water cut
The core of production capacity is how to weaken water enchroachment (invasion), inhibit edge-bottom water energy.By the Development Practice of many years, the at present improvement of comparative maturity
Measure mainly has control hydraulic conical, closing well pressure to bore, fills the water and press cone, artificial water blockoff and draining oil recovery etc..Energy keeps degree lower
Unit perhaps its water body development small scale of well group or water body agensis, the development features for producing the later period are stratum energy deficiencies,
Stratum, which is unable to feed flow, leads to low yield.For the weak oil well of this energy, the core for restoring production capacity after feed flow is insufficient is supplement stratum
Energy.By the Development Practice of many years, the control measures of comparative maturity, which mainly have, at present deep take out, opens recovery, water filling for oil, storage
The measures such as layer transformation.
During realizing the embodiment of the present invention, inventor, which has found the prior art only, to be controlled for single problem individual event
The measure means that reason, inhibition or supplement stratum energy are taken all are individually present.But the big strong energy well group of water body to be inhibited
Bottom water energy be exactly required for weak energy well group, and the energy that anhydrous weak energy well group requires supplementation with strong energy well just
Group is more than needed, and the present invention exactly it is existing stratum natural energy is failed to make full use of aiming at the problem that and propose.
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 fracture and vug carbonate reservoir energy self-balancing development approach of problem.
According to an aspect of the invention, there is provided a kind of fracture and vug carbonate reservoir energy self-balancing development approach,
This method comprises:
The capacity volume variance situation in fracture-cavity units between well group is analyzed, determines target well group；
Identify and portray the seam hole structure of target well group；
The static connectivity structure between target well group is divided, and the static connectivity structure of target well group is moved
The verifying of state connectivity relationship, establishes the fracture hole connectivity structure between target well group；
Utilize the weak part between fracture hole connectivity structure detection target well group；
It is worked out measures in weak part to link up target well group, and the energy balance between goal of regulation and control well group.
Preferably, analyzing the capacity volume variance situation in fracture-cavity units between well group further comprises: by oily in well group
Well monitors static pressure data or according to hydrostatic level reduced reservoir pressure, seeks strata pressure and keeps degree；
Alternatively, calculating oil well stream pressure according to well recovery mode, oil pressure and/or hydrodynamic face.
Preferably, if the seam hole structure of target well group is the solution cavity of large scale, identify and portray the fracture hole knot of target well group
Structure specifically: outline identification is carried out using amplitude gradient attribute or instantaneous energy attribute；In conjunction with maximum curvature attribute and relevant category
Property carry out earthquake solution cavity phase clustering；Identify and portray earthquake solution cavity phase.
Preferably, it if the seam hole structure of target well group is the crack Reservoir Body of high flow-guiding channel, identifies and portrays target well
The seam hole structure of group specifically: carry out large scale crack identification using maximum curvature attribute；In conjunction with stratigraphic dip and coherence properties
It carries out the identification of Seismic Fracture phase and portrays.
Preferably, the static connectivity structure between target well group, and the static connectivity knot to target well group are divided
Structure carries out the verifying of dynamic connectivity relationship, and the fracture hole connectivity structure established between target well group further comprises: using ant body
Tracer technique carries out the tracking of static connection fracture hole, divides to the static connectivity structure between target well group；
Using in well group inter-well interference, production characteristic similarity, Flooding Characteristics and/or tracer monitoring development behavior
Information carries out dynamic connectivity verifying to static connectivity structure；
The fracture hole connectivity structure between target well group is established in conjunction with static connectivity structure and dynamic connectivity relationship.
Preferably, further comprise using the weak part between connectivity relationship detection target well group: being split by discrete
Seam detection technique detects the weak location between the well group of target well group.
Fracture and vug carbonate reservoir energy self-balancing development approach according to the present invention, can guide high-energy well group
Stratum energy is that low energy well group supplements energy, thus solves the problems, such as that the producing level of oil reservoir natural energy is low, reduces people
The cost of industry control water and supplement energy.
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 fracture and vug carbonate reservoir energy self-balancing development approach according to an embodiment of the invention
Flow chart；
Fig. 2 shows fracture and vug carbonate reservoir energy self-balancing development approaches in accordance with another embodiment of the present invention
Flow chart；
Fig. 3 a shows AD4 fracture-cavity units association well group division schematic diagram；
Fig. 3 b shows TH12510 well and TH12511 well injection-production relation curve in AD4 well group；
Fig. 3 c shows AD4 fracture-cavity units pressure distributional difference comparison diagram；
Fig. 3 d shows AD4 fracture-cavity units Reservoir Body meticulous depiction figure；
Fig. 3 e shows the microcrack structure chart in AD4 fracture-cavity units；
Fig. 3 f shows the position of deployment TH12545 horizontal well；
Fig. 3 g shows the acid fracturing curve graph of new well TH12545；
Fig. 3 h shows AD4 well group and TH12507 well group balances preceding streamline distribution figure；
Fig. 3 i shows streamline distribution figure after AD4 well group and TH12507 well group balance.
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.
In an embodiment of the present invention, well group refers to that association well group, association well group are analyzed i.e. in terms of static and dynamic two,
The well group that one group of oil well with incidence relation is constituted.Specifically, the determination for being associated with well group can track skill by ant body first
Art carries out the tracking of static connection fracture hole, realizes and divides to the connectivity structure incidence relation inside fracture-cavity units；In conjunction with fracture hole
The development behaviors information such as the inter-well interference of oil well, production characteristic similarity, Flooding Characteristics, tracer monitoring is to above-mentioned stroke in unit
The incidence relation divided carries out dynamic authentication；A fracture-cavity units are finally divided into several association well groups.
According to the genetic analysis of fracture and vug carbonate reservoir karst Reservoir Body, same geologic setting control area it is adjacent
It is associated with well group, there are certain relevances between Reservoir Body；Meanwhile according to proximity association well group oil gas on same geologic setting
Hiding feature consistency may determine that, equally exist certain relevance between different association well groups.Only this relevance is very long
Geologic(al) period in be connected to, and in the process of development, oil reservoir adopts what speed was complementary to one another much higher than energy between association well group
Speed just causes association well group pressure difference occur.Following exemplary embodiments of the invention are sought to using between association well group
This capacity volume variance realize the exploitation of oil reservoir energy self-balancing.
Fig. 1 shows fracture and vug carbonate reservoir energy self-balancing development approach according to an embodiment of the invention
Flow chart.This method is based on the fine description of Carbonate Reservoir fracture hole body Reservoir Body space, in conjunction with oil reservoir energy state, even
The information such as logical situation, characteristic of production dynamic, between energy well group strong and weak in same fracture-cavity units or that capacity volume variance is big is adjacent
Artificial communication is established between fracture-cavity units, realizes that high-energy area supplements energy to low energy area and realizes the exploitation side of energy balance
Formula.As shown in Figure 1, method includes the following steps:
Step S101 analyzes the capacity volume variance situation in fracture-cavity units between well group, determines target well group.
The present invention is to supplement the energy of weak energy well group or unit to guide the energy of strong energy well group or unit, into
And reach the strong energy well group oil body energy of release, the weak energy well group oil body energy of supplement, and improve the hiding oil recovery of the two
Purpose.Therefore, it need to determine that there are the apparent target well groups of capacity volume variance in adjacent well group or fracture-cavity units first.
Specifically, according to the static data and dynamic data of fracture and vug carbonate reservoir development and production, according to oil reservoir work
The energy that Cheng Fangfa calculates oil well in fracture-cavity units keeps pressure difference between degree and well, identifies adjacent there are energy notable difference
Target well group.For example, according to the energy situation of the static data and dynamic data analysis of the typical well in the well group well group.
Step S102 identifies and portrays the seam hole structure of target well group.
Determined there are after the apparent target well group of capacity volume variance, need to carry out it in structure it is fine identification with
It portrays, so that the feasibility and concrete implementation mode of energy self-balancing are realized in analysis from structure.For example, to target well group
It carries out seam hole structure identification with high accuracy surface modelling data and portrays, and utilize the hair of seam hole structure analysis target well group
Situation and controlled situation are educated to determine whether to realize energy self-balancing between target well group.
Step S103 divides the static connectivity structure between target well group, and the static connectivity to target well group
Structure carries out the verifying of dynamic connectivity relationship, establishes the fracture hole connectivity structure between target well group.
On the basis of fracture hole fine structure is identified and portrayed, carries out seam hole structure static between target well group and divide
With dynamic Connectivity Evaluation, and based on the static connectivity structure of division, dynamic connectivity relationship is means, establishes mesh
Fracture hole connectivity structure between mark well group determines target well group to facilitate the understanding to the connection structure between target well group
Between connectivity relationship.Wherein, the connectivity relationship between target well group include be associated with well group between connection structure can
Realize a possibility that linking up the target well group.
Although being associated with the division of well group based on connectivity, it is not offered as not having the possibility of connection between association well group
Property, and the size of the possibility just the connection structure between target well group with the presence or absence of crack, crack position and crack
The factors such as size it is directly related, therefore, before to the measure of energy balance communication is established between target well group, need according to each
The seam hole structure of a target well group carries out static connectivity structure first against the connecting structure between target well group and divides and move
The verifying of state connectivity relationship, resettles the fracture hole connectivity structure between target well group to facilitate to the connection knot between target well group
The understanding of structure, and then determine the connectivity relationship between target well group, the determination of the connectivity relationship is conducive to identify target well
Weak location between group.
Step S104 utilizes the weak part between fracture hole connectivity structure detection target well group.
Fracture hole connectivity structure between target well group specifies that the connection structure between target well group whether there is crack, split
It situations such as size in the position of seam and crack, in order to realize the communication between target well group, needs according to fracture hole connectivity structure
Geology most weak part between target well group is found then to be divided according to the oil well of the position to determine the position established and manually linked up
Cloth situation formulates corresponding artificial communication measure.
Step S105 is worked out measures in weak part to link up target well group, and the energy between goal of regulation and control well group is flat
Weighing apparatus.
The connected relation between target well group is manually established, needs to carry out modifying and dredging to weak part association well group.
Usually there are two kinds of situations, there is ready-made oil well one is weak part, can choose in this case and the old well of this mouth is carried out
Extensive acidfracturing treatment realizes that artificial seam links up target well group；Another situation is that the oil-free well control of weak part, this feelings
It needs to dispose a bite horizontal well in weak part under condition and links up target well group, cause more man-made fractures in combination with the complete well of acid fracturing
Target well group is linked up.
Due to the presence of stratum energy pressure difference, after the channel manually established between target well group, lead to high energy target
The strong bottom water of well group is flowed to low energy target well group, and this flowing and the maximum difference of ground water filling supplement energy are water control
Difficulty processed is big.In order to be precisely controlled strong energy object well group bottom water to the flow of weak energy object well group, need timely monitor weak
The aqueous and energy variation situation of oil well in energy object well group.In addition, can assist mentioning to oil well to adjust water enchroachment (invasion) speed
Liquid draining adjusts the measures such as runner, edge water filling to be controlled.
According to a kind of fracture and vug carbonate reservoir energy self-balancing development approach provided in this embodiment, adjacent energy is determined
The big target well group of strong and weak difference is measured, and by the identification for carrying out seam hole structure to the target well group and is portrayed come clearly to target
The feasibility of well group progress energy self-balancing exploitation；Fracture hole connectivity structure is established according to the connected relation between target well group, and
Weak part between fracture hole connectivity structure detection target well group accordingly；It is worked out measures in weak part to link up target well group,
And the energy balance between goal of regulation and control well group.The present embodiment can be in same fracture-cavity units between the big well group of strong and weak capacity volume variance
Or established between the big adjacent cells of capacity volume variance it is artificial link up, realize that high-energy area supplements energy to low energy area and realizes
The development scheme of energy balance；And it discharges the energy of strong energy well group not only may be used come the method for supplementing the energy of weak energy well group
To improve the recovery ratio of strong and weak energy well group simultaneously, and the producing level of oil reservoir natural energy can be improved and reduce artificial
It controls water and supplements the cost of energy, to realize scientific development.
Fig. 2 shows fracture and vug carbonate reservoir energy self-balancing development approaches in accordance with another embodiment of the present invention
Flow chart.This method is first according to fracture and vug carbonate reservoir development and production dynamic data, according to reservoir engineering method meter
The energy for calculating oil well in fracture-cavity units keeps pressure difference between degree and well, identifies that adjacent there are the target wells of energy notable difference
Group；Seam hole structure is carried out to target well group finely to identify and portray；It is developed according to fracture and cave reservoir and is connected to Distribution Characteristics, crack
Situation and oil and water zonation mode etc. carry out connection status analysis；It is found by technologies such as discrete fractures detections most thin between being associated with well group
Weak position；Finally by the weak part between artificial reconstructed (including deployment horizontal well, old well acid fracturing etc.) association well group, realize
Strong energy well group water body is flowed to weak energy well group, and Qiang Nengliang well group oil body energy, which is released, improves recovery ratio, weak energy well
Group obtains water body supplement energy and improves recovery ratio.As shown in Fig. 2, method includes the following steps:
Step S201 analyzes the capacity volume variance situation in fracture-cavity units between well group, determines target well group.
According to the static data and dynamic data of fracture and vug carbonate reservoir development and production, according to reservoir engineering method meter
The energy for calculating oil well in fracture-cavity units keeps pressure difference between degree and well, identifies that adjacent there are the target wells of energy notable difference
Group.
In the step, by monitoring static pressure data to the typical well being associated in well group in fracture-cavity units or according to hydrostatic level
Current strata pressure is converted, strata pressure is then sought and keeps the method for degree to calculate the energy situation of association well group.
In addition, oil well stream pressure can also be calculated according to oil pressure/hydrodynamic face by taking out oil production method according to oil well self-spray/machine
Method calculates the energy situation of association well group, and this method can be used as a kind of alternative method of this step.
Therefore, analyzing the capacity volume variance situation in fracture-cavity units between well group can be realized by following two mode: right
Oil well monitor static pressure data or according to hydrostatic level reduced reservoir pressure in well group, seeks strata pressure and keeps degree；Alternatively, root
Oil well stream pressure is calculated according to well recovery mode, oil pressure and/or hydrodynamic face.
Step S202 according to the type identification of seam hole structure and portrays the seam hole structure of target well group.
For the feature of the strong heterogeneity of fracture-pore reservoir, identification and the quarter of seam hole structure are carried out using geophysical method
It draws.For different seam hole structure types, different technologies is taken to identify and portray, specifically: first for the solution cavity of large scale
Outline identification is first carried out using amplitude gradient attribute or instantaneous energy attribute, is carried out in conjunction with maximum curvature attribute and coherence properties
The clustering of earthquake solution cavity phase forms the identification of earthquake solution cavity phase and portrays；It is first for the crack Reservoir Body of high flow-guiding channel
Large scale crack identification is carried out first with maximum curvature attribute, carries out Seismic Fracture phase in conjunction with stratigraphic dip and coherence properties
It identifies and portrays.Karst seismic facies analysis technique using the fusion of more attributes sorts out the seismic response of homogenous characteristics, reduction pair
The multi-solution that geologic feature is explained, to realize finely identifying and portray for seam hole structure.
To sum up, before identifying and portraying the seam hole structure of target well group, it is first determined the type of seam hole structure, if target
The seam hole structure of well group is the solution cavity of large scale, identifies and portray the seam hole structure of target well group specifically: uses amplitude gradient
Attribute or instantaneous energy attribute carry out outline identification；The cluster of earthquake solution cavity phase is carried out in conjunction with maximum curvature attribute and coherence properties
Analysis；Identify and portray earthquake solution cavity phase.If the seam hole structure of target well group is the crack Reservoir Body of high flow-guiding channel, identification is simultaneously
Portray the seam hole structure of target well group specifically: carry out large scale crack identification using maximum curvature attribute；In conjunction with stratigraphic dip
The identification of Seismic Fracture phase is carried out with coherence properties and is portrayed.
Step S203 divides the static connectivity structure between target well group, and the static connectivity to target well group
Structure carries out the verifying of dynamic connectivity relationship, establishes the fracture hole connectivity structure between target well group.
Although being associated with the division of well group based on connectivity, it is not offered as not having the possibility of connection between association well group
Property, and the size of the possibility just the connection structure between target well group with the presence or absence of crack, crack position and crack
The factors such as size it is directly related, therefore, before to the measure of energy balance communication is established between target well group, need according to each
The seam hole structure of a target well group carries out static connectivity structure first against the connecting structure between target well group and divides and move
The verifying of state connectivity relationship, resettles the fracture hole connectivity structure between target well group to facilitate to the connection knot between target well group
The understanding of structure, and then determine the connectivity relationship between target well group, the determination of the connectivity relationship is conducive to identify target well
Weak location between group.
The fracture hole connectivity structure established between target well group can use same technological means with the division for being associated with well group.Tool
Body, the tracking of static connection fracture hole is carried out by using ant body tracer technique, to the static connectivity between target well group
Structure is divided；It is opened using inter-well interference, production characteristic similarity, Flooding Characteristics and/or the tracer monitoring in well group
It sends out multidate information and dynamic connectivity verifying is carried out to static connectivity structure；It is closed in conjunction with static connectivity structure and dynamic connectivity
System establishes the fracture hole connectivity structure between target well group.
Step S204 utilizes the weak part between discrete fractures detection technique detection target well group.
It realizes the communication between target well group, weak part must be found, convenient for formulating communication measure.Specifically, according to
Fracture hole connectivity structure, and detect by discrete fractures detection technique the weak location between the well group of target well group.
Step S205 is worked out measures in weak part to link up target well group, and the energy between goal of regulation and control well group is flat
Weighing apparatus.
In order to illustrate more clearly of the scheme of the present embodiment and its technical effect that can be realized, below with system in Tahe Oilfield
For AD4 fracture-cavity units, corresponding step S201 is illustrated to step S205:
AD4 fracture-cavity units are typical " secondary fragmentation+ancient stream channel " geologic settings, are broken after waterline classifying, so that
Reservoir Body dysplasia is complicated.The unit is intersected with the main fault of oil-control by secondary fragmentation, and oil gas dredges that condition is good, oil gas
Enrichment degree is high.Unit was developed from investment in 2007, tired out 84.9 ten thousand tons of oil-producing, recovery percent of reserves 4.8%.
Fig. 3 a shows AD4 fracture-cavity units association well group division schematic diagram.As shown in Figure 3a, AD4 fracture-cavity units are divided
Well group is associated with TH12514 tri- for TH12507, AD4, wherein TH12507 is associated with the dark area that well group is the right in Fig. 3 a
Domain, the main oil well that TH12507 is associated in well group have TH12530, TH12507CH, TH12545 and TH12508；AD4 association
Well group be Fig. 3 a in lower-left darker regions, TH12507 association well group in main oil well have AD4, TH12510, TH12511 with
And TH12523；TH12514 is associated with the darker regions that well group is upper left in Fig. 3 a, and the main oil well in TH12514 association well group has
TH12543, TH12524, TH12544 and TH12514.
Fig. 3 b shows TH12510 well and TH12511 well injection-production relation curve in AD4 well group.As shown in Figure 3b, most
Below one be TH12510 well daily water-injection rate curve, remaining five curves from top to bottom are respectively the oil of TH12511 well
Pressure, daily fluid production rate, daily oil production, moisture content and hydrodynamic surface curve, in April, 2011 carry out unit pilot flood, note to TH12510 well
TH12511 well shows the feature obviously imitated during water, i.e., aqueous decline, pressure rise, yield rises, on hydrodynamic face
It rises, it is seen then that TH12510 well is connected to TH12511 well, belongs to AD4 association well group.
Corresponding step S201 has found that there are two target well groups that capacity volume variance is big in AD4 fracture-cavity units.
Oil well water body development, energy are strong in TH12507 well group, the basic High water cut of oil well；AD4 well group water body agensis, oil
The anhydrous production of well, machine pumping produce, and feed flow is insufficient；TH12514 well group mainly with water filling for oil production based on.As it can be seen that AD4 fracture hole list
The energy power contradiction presented at the beginning of member 2015 is the strong High water cut of east TH12507 well group energy, and southern AD4 well group energy is weak not
Aqueous, western TH12514 well group energy is weak, and the development of oil well Reservoir Body is isolated in well group, and production feature shows operation
Quick feed flow is insufficient afterwards, opens between needing or the water filling of this well is for oil production, interwell communication degree is poor, i.e. constant volume feature is obvious.
Fig. 3 c shows AD4 fracture-cavity units pressure distributional difference comparison diagram.As shown in Figure 3c, TH12507, AD4 and
The mean pressure coefficient of the oil well of TH12514 tri- association well groups is respectively 1.11,0.81,0.80.Also, east TH12507
Well group oil well TH12508 and oil well TH12507CH energy are sufficient, convert stratum energy 72.59MPa by liquid level at the beginning of 2015,
Stratum energy keeps degree 99.4%, and energy keeps degree high, oil well TH12508 and oil well TH12507CH is aqueous has been up to
It is invalid that 80% or more, TH12508 well attempt water blockoff control bottom water.Liquid level converts stratum energy at the beginning of southern AD4 well group 2015
52.66MPa, stratum energy keep degree 72.1%, and energy keeps degree low, and oil well production is not aqueous, and oil well machine pumping produces, nothing
Unit water injection well supplements energy.By calculating, AD4 well group and TH12507 well group pressure difference △ P reach 19.93MPa.Accordingly, it determines
Two big target well groups of AD4 fracture-cavity units self-energy difference are TH12507 well group, AD4 well group, wherein TH12507 well group energy
Amount is strong, and AD4 well group energy is weak.
Corresponding step S202, AD4 fracture-cavity units Reservoir Body are identified and are portrayed.
Fig. 3 d shows AD4 fracture-cavity units Reservoir Body meticulous depiction figure.Since only there are three be associated with well in AD4 fracture-cavity units
Group, therefore while identifying and portraying the seam hole structure of target well group TH12507 and AD4, well group TH12514 is also carried out
The identification of seam hole structure with portray.Fig. 3 d is to carry out essence to the Reservoir Body of AD4 fracture-cavity units with high accuracy surface modelling data
Thin description.As shown in Figure 3d, wherein the dark Reservoir Body structure indicated in oil well, Reservoir Body spread mode is approximate circle, fracture hole
It is closer between body, it is seen then that AD4 fracture-cavity units by the compound action of secondary fragmentation and ancient stream channel, extremely develop by Reservoir Body, solution cavity
The development of type Reservoir Body is preferable.Oil well reaches 70% to wellblock controlling extent at present, and controlling extent is relatively high.
Corresponding step S203, the connection possibility identification between target well group TH12507 and AD4.
Fig. 3 e shows the microcrack structure chart in AD4 fracture-cavity units.In Fig. 3 e, three dotted line frames indicate three association wells
Group, the straight line being of different shades indicate microcrack, are tracked with energy body and ant body to seam hole structure, illustrate list
Fairly large fracture hole Distribution Pattern in member, there are many microcracks in actual formation, these microcracks can be used as association well group
Between the basis that is connected to, and can be used as one of the condition for whether having connection possibility between identification target well group.
Corresponding step S204, weak part identifies between target well group AD4 and TH12507.
As shown in Figure 3 e, it according to the fracture hole connectivity structure between target well group AD4 and TH12507, is examined by discrete fractures
Survey technology detects minute crack in AD4 unit, and portrays figure overlapping, discovery meticulously with AD4 fracture-cavity units Reservoir Body
A plurality of microcrack is developed between two target well groups of TH12507 and AD4, has the condition for establishing connection.Wherein, microcrack and storage
Collective's lamination portion is shown in the oil well TH12523 well northeastward of AD4 well group, i.e. box indicates position, two mesh in Fig. 3 e
The fracture spacing marked between well group is larger, is the most possible position established and linked up.
Corresponding step S205 disposes TH12545 horizontal well and links up two target well groups by acid fracturing.
Fig. 3 f shows the position of deployment TH12545 horizontal well.As illustrated in figure 3f, the position of well head and B point can be in figure
Fig. 3 e is corresponding.Vantage point is chosen in weak part and disposes TH12545 horizontal well, and horizontal well path direction is as far as possible along target well
The line direction of group AD4 and TH12507.In April, 2015 carries out acid fracturing to TH12545 well, and Fig. 3 g shows new well TH12545's
Acid fracturing curve graph.As shown in figure 3g, left side ordinate indicates operation pressure in figure, and unit is megapascal (MPa) (MPa), and right side is vertical to be sat
Mark indicates operational discharge capacity, unit cubic meter (m per minute3/ min), abscissa indicates the construction time, unit minute (min), is applying
During work, squeezed into slippery water, frozen glue, high temperature gel acid, linear glue, frozen glue and slippery water respectively, and 205 to
The temporary stifled fibrous nodules 25Kg that joined temporarily stifled fiber 600Kg and 3 to 4 millimeters in the time of 232min, 232 to 248min's
It joined temporarily stifled fiber 400Kg in time.Acid fracturing curve, which is shown, has linked up many cracks, including 55 minutes, 86 minutes and 128 points
The moment such as clock, which can be seen, significantly to be pressed off crack and show, and oil pressure when termination of pumping for 7.2MPa illustrate entire crack scale compared with
Greatly, unimpeded (usual termination of pumping pressure is less than 20MPa and illustrates that stratum Reservoir Body is relatively developed) is linked up in crack.By manually establishing AD4 well
After group is linked up with TH12507 well group, TH12507 well group liquid level reduced reservoir pressure value 67.19MPa, decline before relatively balancing
5.40MPa；AD4 well group strata pressure 60.21MPa rises 7.55MPa before relatively balancing.Pressure difference between two well groups becomes
For 6.98MPa, reduce 12.95MPa before relatively balancing, the pressure of two well groups gradually tends to balance.
Fig. 3 h shows AD4 well group and TH12507 well group balances preceding streamline distribution figure.As illustrated in figure 3h, AD4 well group with
Before TH12507 well group balance, show that AD4 well group is an individual flow field by numerical simulation, fluid is out of four circumferential well groups
AD4 and TH12530 well stream is dynamic；And TH12507 well group is also an individual flow field, fluid into through group TH12508,
TH12507CH flowing.Fig. 3 i shows streamline distribution figure after AD4 well group and TH12507 well group balance, as shown in figure 3i, AD4 well
For group with after TH12507 well group balance, fluid in TH12507 well group flows to AD4 well group by TH12545 well in large quantities, and two
Fluid is linked up between well group.
Therefore, by establishing the geological model of AD4 fracture-cavity units, and numerical simulation is carried out, analog result is shown in
Before and after TH12545 well acid fracturing, great variation has occurred in wellblock pressure field and flow field: AD4 well group and TH12507 well group flow field are obtained
To link up.
TH12545 horizontal well acid fracturing has linked up the big target well group of strong and weak capacity volume variance, and successfully by strong energy object well
The bottom water of group introduces weak energy object well group.Suggestions for improvement is also obvious after energy gradually balances, first is that TH12507 well
Group water energy weakens oil body energy and is released, and TH12508 well continuously self-spray can produce 20 tons of the oil that increases day by day；Second is that AD4 well group
Stratum energy is supplemented, and avoids causing reserves to lose because energy declines crack closure；Third is that AD4 well group energy is supplemented
Afterwards, Dynamical characteristic submergence gets a promotion, and the machine of effectively improving adopts effect.But water body introduces after AD4 well group, also brings one
Fixed negative effect, is two mouthfuls of successive water breakthroughs of well of TH12523 and AD4, illustrates that this life bottom water is larger.In order to control diversion
Amount, take respectively TH12507CH well body liquid draining, AD4 draining pressure taper it is weak come water, achieved certain effect at present, under
Step will carry out deep plugging adjustment to TH12545 well, and further control carrys out water within zone of reasonableness.
A kind of fracture and vug carbonate reservoir energy self-balancing development approach provided according to embodiments of the present invention, by dividing
The capacity volume variance situation in fracture-cavity units between well group is analysed, determines target well group；According to the type identification of seam hole structure and portray
The seam hole structure of target well group；The static connectivity structure between target well group is divided, and the static state of target well group is connected to
Property structure carry out the verifying of dynamic connectivity relationship, establish the fracture hole connectivity structure between target well group；It is detected using discrete fractures
Technology detects the weak part between target well group；It is worked out measures in weak part to link up target well group, and goal of regulation and control well
Energy balance between group.The embodiment of the present invention can pass through the weak part portion between two big target well groups of capacity volume variance
New well and/or acidfracturing treatment are affixed one's name to link up two target well groups, and realize that high-energy area is supplemented to low energy area by artificial regulatory
Energy and the development scheme for realizing energy balance make low energy area energy obtain supplement and improve recovery ratio, and high-energy area can measure
Recovery ratio is also improved to release, and the producing level of oil reservoir natural energy can be improved and reduce artificial control water and supplement energy
The cost of amount, to realize scientific development.
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.
To sum up, using fracture and vug carbonate reservoir energy self-balancing development approach of the invention, this method avoid biographies
The one-sidedness that system administers strong/weak energy well group respectively, takes full advantage of the natural energy of fracture-pore reservoir；Can effectively
The energy of the strong energy well group of fracture and vug carbonate reservoir is guided to weak energy well group, while realizing that two well group development effectiveness are equal
Improved；This method is with strong points, significant effect, and field application adaptability is good, belongs to system, energy balance efficiently, applicable
Method makes full use of stratum natural energy to be of great significance the extremely strong fracture-pore reservoir of heterogeneity.
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 (6)
1. a kind of fracture and vug carbonate reservoir energy self-balancing development approach characterized by comprising
The capacity volume variance situation in fracture-cavity units between well group is analyzed, determines target well group；
Identify and portray the seam hole structure of the target well group；
The static connectivity structure between target well group is divided, and the static connectivity structure of target well group is moved
The verifying of state connectivity relationship, establishes the fracture hole connectivity structure between the target well group；
Utilize the weak part between fracture hole connectivity structure detection target well group；
It is worked out measures in the weak part to link up target well group, and the energy balance between goal of regulation and control well group.
2. the method according to claim 1, wherein the capacity volume variance in the analysis fracture-cavity units between well group
Situation further comprises: by being laminated to oil well monitor static pressure data in well group in fracture-cavity units or according to hydrostatic level conversion
Power seeks strata pressure and keeps degree；
Alternatively, calculating oil well stream pressure according to well recovery mode, oil pressure and/or hydrodynamic face.
3. the method according to claim 1, wherein if the seam hole structure of the target well group is the molten of large scale
Hole, the identification and the seam hole structure for portraying the target well group specifically: use amplitude gradient attribute or instantaneous energy attribute
Carry out outline identification；The clustering of earthquake solution cavity phase is carried out in conjunction with maximum curvature attribute and coherence properties；Identify and portray institute
State earthquake solution cavity phase.
4. the method according to claim 1, wherein if the seam hole structure of the target well group is high flow-guiding channel
Crack Reservoir Body, the identification simultaneously portrays the seam hole structure of the target well group specifically: utilizes the progress of maximum curvature attribute
Large scale crack identification；The identification of Seismic Fracture phase is carried out in conjunction with stratigraphic dip and coherence properties and is portrayed.
5. the method according to claim 1, wherein the static connectivity knot divided between target well group
Structure, and the verifying of dynamic connectivity relationship is carried out to the static connectivity structure of target well group, establish the target well group
Between fracture hole connectivity structure further comprise: the tracking of static connection fracture hole is carried out using ant body tracer technique, to target
Static connectivity structure between well group is divided；
Using in target well group inter-well interference, production characteristic similarity, Flooding Characteristics and/or tracer monitoring development behavior
Information carries out dynamic connectivity verifying to the static connectivity structure；
The fracture hole connectivity structure between the target well group is established in conjunction with static connectivity structure and dynamic connectivity relationship.
6. the method according to claim 1, wherein described detect target well group using the fracture hole connectivity structure
Between weak part further comprise: the weak position between the well group of target well group is detected by discrete fractures detection technique
It sets.
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| CN107816339A (en) * | 2017-09-11 | 2018-03-20 | 中国石油天然气股份有限公司 | Waterflooding extraction method and apparatus |
| CN110761754A (en) * | 2018-07-26 | 2020-02-07 | 中国石油天然气股份有限公司 | Water injection method for fracture-cave type carbonate reservoir well group unit |
| CN111173495B (en) * | 2018-10-23 | 2023-09-26 | 中国石油化工股份有限公司 | Fracture-cavity type oil reservoir fracture-cavity unit communication condition evaluation method |
| CN111550231B (en) * | 2019-02-11 | 2022-03-04 | 中国石油化工股份有限公司 | Evaluation method for perfection degree of basic well pattern of fracture-cavity oil reservoir |
| CN110984974B (en) * | 2019-11-29 | 2022-01-25 | 中国石油集团川庆钻探工程有限公司 | Method for determining reasonable gas production speed of water-gas reservoir based on water invasion speed |
| 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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