CN109236254B - A kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method and system - Google Patents
A kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method and system Download PDFInfo
- Publication number
- CN109236254B CN109236254B CN201811427785.5A CN201811427785A CN109236254B CN 109236254 B CN109236254 B CN 109236254B CN 201811427785 A CN201811427785 A CN 201811427785A CN 109236254 B CN109236254 B CN 109236254B
- Authority
- CN
- China
- Prior art keywords
- gas
- acid
- permeability
- acid solution
- interval
- 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.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- E21B43/11—Perforators; Permeators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Economics (AREA)
- Marketing (AREA)
- Animal Husbandry (AREA)
- Health & Medical Sciences (AREA)
- Agronomy & Crop Science (AREA)
- General Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- Marine Sciences & Fisheries (AREA)
- Primary Health Care (AREA)
- Strategic Management (AREA)
- Tourism & Hospitality (AREA)
- General Business, Economics & Management (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention belongs to oil-gas mining technical fields, disclose a kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method, this method is divided into the perforating parameter optimization for not considering acid-rock reaction and the perforating parameter optimization for considering acid-rock reaction, and two kinds of prioritization schemes pass through acquisition horizontal well permeability, porosity data is segmented horizontal well；By existing data, the gas-producing profile of each perforated interval and the pressure difference of each interval are obtained；Due to the difference of permeability, the optimization of perforating parameter is carried out according to parameters such as yield and pressure differences；According to the yield data of each interval, the Kong Mi of each interval is calculated, forms the close optimization method in hole.The present invention never considers the perforating parameter optimization method of acid-rock reaction to the optimization of perforating parameter respectively and considers that the perforating parameter optimization method of acid-rock reaction accounts for comprehensively, it is effectively balanced to inhale sour section and gas-producing profile, gas well deliverability is improved, gas well liquid loading is instructed to develop.
Description
Technical field
The invention belongs to oil-gas mining technical field more particularly to a kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation ginsengs
Number optimization method and system.
Background technique
Currently, the prior art commonly used in the trade is such that
Domestic Deep Carbonate Rocks tight gas reservoir buries depth, and for reservoir space mainly based on crack, hole, physical property is poor,
Porosity, permeability is low, and heterogeneity is strong, and exploitation difficulty is big, and production capacity is lower.In order to increase production capacity, gas well is in completion mode
In selected horizontal well in segments perforation, take in the follow-up process acidification transformation.In acidization, due to the difference of permeability
It is different, cause each well section in horizontal well to inhale acid amount difference, the sour section of suction is serious unbalanced, and cause acid solution to flow to high permeability zone,
Low-permeability layer cannot be transformed.Accordingly, it is possible to carry out the sour section of balanced suction by adjusting perforating parameter, gas well deliverability is improved.Adjustment
Perforating parameter to be broadly divided into two aspects when balanced suction acid section: considering the perforating parameter optimization of acid-rock reaction and does not consider acid
The optimization of perforating parameter when rock reacts.Under the influence of considering acid-rock reaction, the change and acid-rock reaction heat release of lithology make
The change for obtaining temperature, can have an impact the suction acid amount of each interval of horizontal well, and then influence perforating parameter, therefore, in perforation
The influence of reservoir temperature and lithology must be taken into consideration in the optimization process of parameter.For the design method of perforating parameter optimization, mesh
Preceding common method has close variable orifice, change perforating bullet, control the methods of opening degree and open position.
Optimization for perforating parameter, domestic and foreign scholars have carried out a large amount of research.Prior art a pair is in heterogeneous oil
In hiding, the harmonious of horizontal well inflow profile is influenced to propose non-using the close parameter in hole as optimization object based on the close parameter in hole
Homogeneous Reservoir pit shaft --- oil reservoir coupling model optimizes Horizontal Well Perforating Parameters using method for numerical simulation.Existing skill
Art two, which analyzes perforation open position and opening degree, influences horizontal productivity, preferably perforation bullet parameter and open position and
Opening degree.The prior art three analyzes the parameter, including Kong Mi, aperture, hole depth, phase angle etc. for influencing horizontal well completion production capacity
Factor.Various parameters are analyzed by orthogonal experiment, optimal result is obtained, determines best parameter group.
The country examines perforation-rare research of acidification integration completion parameter optimization method in the course of the study at present
The influence that the factors such as temperature, rock type optimize completion parameter in acid solution transformation process is considered.So being badly in need of a kind of side at present
Method carries out completion parameter optimization, improves gas well capacity.
In conclusion problem of the existing technology is:
The country is to perforation-rare research of acidification integration completion parameter optimization method at present, at present to the excellent of perforating parameter
The influence that the factors such as temperature, rock type optimize completion parameter in acid solution transformation process has not been accounted in change
Entirely, gas well capacity is lower；When considering acid-rock reaction, for balanced gas-producing profile, the suction acid amount of each interval can also occur
Change, hypotonic section needs relative to hypertonic section into more acid, so that gas-producing profile amplitude of variation is little, therefore inhales obtaining for acid amount
It is more difficult to take.
Solve the difficulty and meaning of above-mentioned technical problem:
Difficulty is: when considering acid-rock reaction, temperature, rock type influence greatly, for acid solution the suction acid amount on stratum
Amount is sought being not easy；It how to be converted into flow (inhaling acid) section after the suction acid amount for obtaining each interval, carries out each layer
The close design in the hole of section is a significant difficulty.
After solving problem of the prior art, bring meaning are as follows:
By the way that the excellent of integrated completion parameter is transformed to Deep Carbonate Rocks tight gas reservoir horizontal well in segments perforation and acidification
Change, can balanced gas-producing profile, sour section is inhaled, so that production capacity further increases.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation ginsengs
Number optimization method and system.
The invention is realized in this way a kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method, comprising:
(A) horizontal well is segmented, and obtains every section of permeability, porosity data；
(B) it according to each section of permeability data of horizontal well, obtains in the case where not considering acid-rock reaction when injecting acid and respectively penetrates
The pressure difference of the gas-producing profile of hole section and each interval；
(C) difference of permeability when causing gas-producing profile otherness larger, carries out perforation according to yield and pressure difference parameter
The optimization of parameter；
(D) unlike conventional perforation parameter optimization method, in the integrated parameter optimization of perforation-acidification, consider
The influence of acid-rock reaction makes gas-producing profile constantly change when permeability increases after acidification, after 3 groups of acidifications are assumed in selection
Permeability Distribution scheme；
(E) using 3 groups of Permeability Distribution schemes after assuming, the gas-producing profile of each interval is found out respectively, which is judged
Kind scheme makes gas-producing profile more evenly, and production capacity is big, optimization Permeability Distribution scheme；
(F) perforating parameter optimizes；According to point of the acid solution usage data of each interval, Pressure difference distribution and original permeability
Cloth calculates the Kong Mi of each interval.
Further, in step (E), the gas-producing profile of each interval is found out respectively in the case where Perforation Density is 16 hole,
Judge which kind of scheme makes gas-producing profile more evenly；It specifically includes:
(E1) porosity and acid-rock reaction time and acid solution by the Permeability Distribution after acidification, after seeking acidification
Penetration range finds out the corrosion volume of acid solution；Finally seek out acid solution dosage；
(E2) change to characterize the physical property in pore media caused by rock dissolution, determine the hole after acidification using following formula
Porosity
In formula: k --- the permeability after rock is acidified, mD；
--- the porosity after rock is acidified；
(E3) when seeking that acid solution is reacted completely in acidization using acid liquid reaction rate equation formula when required reaction
Between；
In formula: C --- acid strength, mol/L；
J --- acid-rock reaction rate, mol/ (cm2s)；
V0--- acid solution volume, L；
The surface area of S --- disk, cm2；
T --- acid-rock reaction time, s；
To seek acid solution dosage, solved using iterative method；Assume initially that acid solution dosage V1；
(E4) go out earthworm hole equivalent redius during Carbonate acidizing using equations, i.e., the useful effect of acid solution away from
From；
In formula: b --- experimental constant is obtained by experiment；
The molal weight of M --- rock；kg/mol；
Df --- the fractal dimension in earthworm hole；
D --- diffusion constant；
Q --- acid solution injection rate or discharge capacity, m/s；
The density of ρ --- rock, kg/m3；
α --- solubility factor, g/mol；
(E5) it is anti-to be equal to sour rock for the variation to acid solution operating distance range internal porosity in the t time is reacted completely in acid solution
The rock volume for answering corrosion is
In formula: L --- horizontal well length, m；
(E6) acid solution dosage is sought using solubility factor
V=VRock/X20
In formula: V --- acid solution dosage, L；
X20--- volume dissolving power；
The acid solution dosage V1 that will assume is compared with the acid solution dosage V sought, when error is less than 0.005, the acid solution
Dosage is finally to seek result；
The Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter are realized another object of the present invention is to provide a kind of
The computer program of optimization method.
Another object of the present invention is to provide a kind of terminal, the terminal, which is at least carried, realizes the Horizontal Wells For Gas Reservoirs point
The controller of section perforation and acidification transformation parameter optimization method.
Another object of the present invention is to provide a kind of computer readable storage mediums, including instruction, when it is in computer
When upper operation, so that computer executes the Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method.
The Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter are realized another object of the present invention is to provide a kind of
The Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization control system of optimization method, the Horizontal Wells For Gas Reservoirs segmenting perforating
And acidification transformation parameter optimization control system includes:
Horizontal well in segments unit for being segmented to horizontal well, and obtains every section of permeability, porosity data；
The pressure difference acquiring unit of the gas-producing profile of each perforated interval and each interval, for according to each section of permeability of horizontal well
Data obtain the gas-producing profile of each perforated interval and the pressure of each interval in the case where not considering acid-rock reaction when injecting acid
Difference；
Perforating parameter optimizes unit, for the difference to permeability, when causing gas-producing profile otherness larger, according to yield
And pressure difference parameter carries out the optimization of perforating parameter；
Assuming that the Permeability Distribution scheme unit after 3 groups of acidifications, is used in the integrated parameter optimization of perforation-acidification,
The influence for considering acid-rock reaction makes gas-producing profile constantly change when permeability increases after acidification, takes 3 groups of acid of hypothesis
Permeability Distribution scheme after change；
Permeability Distribution scheme optimization unit, for finding out respectively each using 3 groups of Permeability Distribution schemes after assuming
The gas-producing profile of interval judges which kind of scheme makes gas-producing profile more evenly, and production capacity is big, optimization Permeability Distribution side
Case；
Each close acquiring unit in interval hole optimizes for perforating parameter；According to the acid solution usage data of each interval, pressure difference
Distribution and the distribution of original permeability, calculate the Kong Mi of each interval.
Another object of the present invention is to provide one kind at least to carry the Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation
The Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization equipment of parameter optimization control system.
In conclusion advantages of the present invention and good effect are as follows:
The present invention never considers the perforating parameter optimization method of acid-rock reaction to the optimization of perforating parameter respectively and considers acid
The perforating parameter optimization method of rock reaction accounts for comprehensively, by the factors such as temperature, rock type in acid solution transformation process to complete
The influence of well parameter optimization accounts for completely, having effectively facilitated further increasing for gas well deliverability；Pass through horizontal well perforation-
After acidification integration transformation, apparent variation is had occurred in the IPR curve of horizontal well, and the open-flow capacity of horizontal well significantly increases, such as
Shown in Fig. 2.
Detailed description of the invention
Fig. 1 is Deep Carbonate Rocks tight gas reservoir horizontal well in segments perforation provided in an embodiment of the present invention and acidification transformation one
The Technology Roadmap of body completion parameter optimization；
Fig. 2 is the IPR curve graph of Deep Carbonate Rocks tight gas reservoir horizontal well provided in an embodiment of the present invention.
Fig. 3 is the perforating parameter optimization method flow chart provided in an embodiment of the present invention for not considering acid-rock reaction；
Fig. 4 is the perforating parameter optimization method flow chart provided in an embodiment of the present invention for considering acid-rock reaction；
Fig. 5 is certain net horizontal section original permeability distribution scheme provided in an embodiment of the present invention；
Fig. 6 is the gas-producing profile figure and optimization when the net horizontal section provided in an embodiment of the present invention does not consider acid-rock reaction
Gas-producing profile figure afterwards；
Fig. 7 is the close parameter optimization scheme in hole when the net horizontal section provided in an embodiment of the present invention does not consider acid-rock reaction；
Fig. 8 is 3 groups of schemes of permeability optimization when considering acid-rock reaction in net horizontal section provided in an embodiment of the present invention；
Fig. 9 be Permeability Distribution scheme provided in an embodiment of the present invention be K1, K2, K3 when gas-producing profile figure；
Figure 10 is the acid solution dosage for each interval that the net horizontal section provided in an embodiment of the present invention considers after acid-rock reaction；
Figure 11 is that the net horizontal section provided in an embodiment of the present invention considers after acid-rock reaction under different temperatures, different lithology
Acid solution dosage
Figure 12 is that the net horizontal section provided in an embodiment of the present invention considers the close parameter optimization conceptual scheme in hole after acid-rock reaction.
Figure 13 is that the net horizontal section provided in an embodiment of the present invention considers after acid-rock reaction under different temperatures, different lithology
The close parameter optimization conceptual scheme in hole.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
What the present invention analyzed is perforation-acidification integration completion parameter optimization method, domestic at present to this rare research,
During analysis, it is contemplated that the influence that the factors such as temperature, rock type optimize completion parameter in acid solution transformation process.Institute
To be badly in need of a kind of method progress completion parameter optimization at present, gas well capacity is improved.
Application principle of the invention is described in detail with reference to the accompanying drawing.
Horizontal Wells For Gas Reservoirs segmenting perforating provided in an embodiment of the present invention and acidification transformation parameter optimization method mainly include not
Consider the perforating parameter optimization method of acid-rock reaction and considers the perforating parameter optimization method of acid-rock reaction.
The perforating parameter optimization method provided in an embodiment of the present invention for not considering acid-rock reaction as shown in Figure 3 are as follows:
S101: being segmented horizontal well, and obtains every section of permeability, porosity data；
S102: by data such as each section of permeabilities of existing horizontal well, in the case where not considering acid-rock reaction when injecting acid
Obtain the gas-producing profile of each perforated interval and the pressure difference of each interval；
S103: due to the difference of permeability, so that gas-producing profile otherness is larger, joined at this time according to yield and pressure difference etc.
Number carries out the optimization of perforating parameter；
S104: according to the distribution of the yield data of each interval, Pressure difference distribution and original permeability, each layer is calculated
The Kong Mi of section.
Close perforation hole provided in an embodiment of the present invention is 16 holes.
The perforating parameter optimization method provided in an embodiment of the present invention for considering acid-rock reaction as shown in Figure 4 are as follows:
S201: assuming that the Permeability Distribution scheme after 3 groups of acidifications, using 3 groups of permeability schemes after hypothesis, in Perforation
Close is the gas-producing profile for finding out each interval in the case where 16 holes respectively, judges which kind of scheme makes gas-producing profile more evenly,
And production capacity is big, thus optimization permeability scheme；
S202: by the Permeability Distribution after acidification, the porosity after acidification is sought using empirical equation, and sour rock is anti-
Between seasonable and acid solution penetration range, so as to find out the corrosion volume of acid solution.Finally seek out acid solution dosage；
S203: according to the acid solution usage data of each interval calculated, converting it into flow (inhaling acid) section, from
And carry out the close optimization in hole
S204: according to the distribution of the flow profile, Pressure difference distribution and the original permeability that calculate, each layer is calculated
The Kong Mi of section.
It is provided in an embodiment of the present invention to assume that the Permeability Distribution scheme after 3 groups of acidifications is essentially in low-permeability
The increasing degree of permeability is higher than the increasing degree after the acidification of high permeability interval after interval acidification, final the result is that making
Gas-producing profile is more uniform.
The calculation method of porosity after acidification provided in an embodiment of the present invention are as follows: original permeability is introduced into correlation
And initial porosity, and use γ=1.1, β=1.5, calculation formula are as follows:
In formula: k --- the permeability after rock is acidified, mD；
--- the porosity after rock is acidified；
Acid-rock reaction time utilization acid liquid reaction rate equation formula provided in an embodiment of the present invention is sought:
In formula: C --- acid strength, mol/L；
J --- acid-rock reaction rate, mol/ (cm2s)；
V0--- acid solution volume, L；
The surface area of S --- disk, cm2；
T --- acid-rock reaction time, s；
In order to seek acid solution dosage, is solved using iterative method, assume initially that acid solution dosage V1.
The solution formula of acid solution penetration range provided in an embodiment of the present invention are as follows:
In formula: b --- experimental constant is obtained by experiment；
The molal weight of M --- rock；kg/mol；
Df --- the fractal dimension in earthworm hole；
D --- diffusion constant；
Q --- acid solution injection rate or discharge capacity, m/s；
The density of ρ --- rock, kg/m3；
α --- solubility factor, g/mol；
The corrosion volume of acid solution provided in an embodiment of the present invention be to acid solution react in the t time completely acid solution act on away from
Variation from range internal porosity, calculation formula are as follows:
In formula: L --- horizontal well length, m；
Acid solution dosage provided in an embodiment of the present invention is sought using solubility factor:
V=VRock/X20
In formula: V --- acid solution dosage, L；
X20--- volume dissolving power；
The acid solution dosage V1 that will assume is compared with the acid solution dosage V sought, and when error is less than 0.005, which is used
Amount is exactly finally to seek result.
Horizontal Wells For Gas Reservoirs segmenting perforating provided in an embodiment of the present invention and acidification transformation parameter optimization control system include:
Horizontal well in segments unit for being segmented to horizontal well, and obtains every section of permeability, porosity data；
The pressure difference acquiring unit of the gas-producing profile of each perforated interval and each interval, for according to each section of permeability of horizontal well
Data obtain the gas-producing profile of each perforated interval and the pressure of each interval in the case where not considering acid-rock reaction when injecting acid
Difference；
Perforating parameter optimizes unit, for the difference to permeability, when causing gas-producing profile otherness larger, according to yield
And pressure difference parameter carries out the optimization of perforating parameter；
Assuming that the Permeability Distribution scheme unit after 3 groups of acidifications, is used in the integrated parameter optimization of perforation-acidification,
The influence for considering acid-rock reaction makes gas-producing profile constantly change when permeability increases after acidification, takes 3 groups of acid of hypothesis
Permeability Distribution scheme after change；
Permeability Distribution scheme optimization unit, for finding out respectively each using 3 groups of Permeability Distribution schemes after assuming
The gas-producing profile of interval judges which kind of scheme makes gas-producing profile more evenly, and production capacity is big, optimization Permeability Distribution side
Case；
Each close acquiring unit in interval hole optimizes for perforating parameter；It is used according to the acid solution of each interval calculated
The distribution for measuring data, Pressure difference distribution and original permeability, calculates the Kong Mi of each interval.
For being located at a bite horizontal well of the gas field Mo Xi Temple of the Dragon King group, the invention will be further described.
Positioned at a bite horizontal well of the gas field Mo Xi Temple of the Dragon King group, the length of horizontal well is 4668-5090m, horizontal well institute
It is dense carbonate in interval.The partial parameters in horizontal well have been obtained, has been badly in need of the more balanced suction acid of acquisition at present and cuts open
The perforating parameter prioritization scheme of face and gas-producing profile is now intended to implement the well technical solution of the present invention, and Fig. 2 is of the invention real
The IPR curve graph of the Deep Carbonate Rocks tight gas reservoir horizontal well of example offer is provided.
As shown in Figure 1, obtaining the perforating parameter of net horizontal section.Concrete operations are as follows:
(1) according to comprehensive log interpretation, net horizontal section is divided into 4684-4695,4750-4823,4838-4911,4926-
5000,5015-5074m gas-bearing formation section is illustrated in figure 5 the original permeability distribution of gas-bearing formation section, the hole net horizontal section 4684-4695m
Porosity is 5.85%, and well section 4750-4823,4838-4911,4926-5000m porosity is the hole 4.43%, 5015-5050m
Porosity is 4.66%, and the porosity of remaining section is 4.33%.
(2) in the case where not considering acid-rock reaction, its gas-producing profile and optimization are found out according to original permeability distribution
Gas-producing profile afterwards, such as Fig. 6.
(3) it since gas-producing profile otherness is excessive, needs to carry out perforating parameter optimization to gas-producing profile, after optimization
Yield, Pressure difference distribution and the permeability of each interval optimized after shot density, as a result such as Fig. 7.
(4) in the case where considering acid-rock reaction, it has been assumed that 3 groups of permeability schemes, such as Fig. 8.Pass through the permeability side
Case calculates separately each interval gas-producing profile of the net horizontal section at 16 hole Kong Miwei, as shown in Figure 9.By analyzing 3 groups of infiltrations
The gas-producing profile of saturating rate finds the gas-producing profile figure of the third permeability scheme compared to first, second kind of permeability scheme
More evenly, gas production is also greater than first two scheme for gas-producing profile.Permeability scheme selects K3 scheme as a result,.
In scheme by acidification after Permeability Distribution, seek it is acidified after porosity distribution.
Porosity after acidification is found out by the permeability after the original permeability of original interval and acidification.
(5) in acidization, use the concentration at 150 DEG C for 6mol/L, the gel acid that concentration of hydrochloric acid is 20%,
Reaction speed is J=4.343*10^ (- 4) * e^ (- 11398/RT) * c^0.4863.Acid solution is carried out to be reacted to concentration from fresh acid
10% for fresh acid concentration is used as residual acid.Call acid solution by acid solution is applied to the time used in residual acid as fresh acid and react institute completely
It takes time, the distance that acid solution flows through is known as acid solution operating distance.
Time when acid solution is reacted completely at 120 DEG C is t=3375s；
Time when acid solution is reacted completely at 150 DEG C is t=2634s.
(6) when the calculating of its earthworm hole equivalent redius, L takes 1 to be calculated, calculated the useful effect of each interval away from
From.
(7) acid solution dosage is sought
Judge V1-V < 0.005, it is as shown in Figure 10 to find out acid solution dosage.
(8) the acid solution dosage under different temperatures and different lithology is analyzed, as shown in figure 11.
(9) acid solution volume value is utilized, original permeability value, Pressure difference distribution calculate the close distribution in hole of each interval, such as Figure 12
It is shown.
Figure 12 is that the net horizontal section provided in an embodiment of the present invention considers the close parameter optimization conceptual scheme in hole after acid-rock reaction.
(10) the close distribution in hole under different temperatures and different lithology is analyzed, as shown in figure 13.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method, it is characterised in that energy efficient balance is inhaled acid and cutd open
Face and gas-producing profile, the Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method include:
(A) horizontal well is segmented, and obtains every section of permeability, porosity data；
(B) according to each section of permeability data of horizontal well, the gas-producing profile and each interval of each perforated interval are obtained when injecting acid
Pressure difference；
(C) optimization of perforating parameter is carried out according to yield and pressure difference parameter；
(D) the Permeability Distribution scheme after 3 groups of acidifications is selected；
(E) 3 groups of Permeability Distribution schemes are utilized, find out the gas-producing profile of each interval, optimization Permeability Distribution scheme respectively；
(F) perforating parameter optimizes；According to the distribution of the acid solution usage data, Pressure difference distribution and original permeability of each interval,
Calculate the Kong Mi of each interval.
2. Horizontal Wells For Gas Reservoirs segmenting perforating as described in claim 1 and acidification transformation parameter optimization method, which is characterized in that step
Suddenly it in (E), finds out the gas-producing profile of each interval respectively in the case where Perforation Density is 16 hole, judges which kind of scheme makes
Gas-producing profile is more evenly；It specifically includes:
(E1) by the Permeability Distribution after acidification, porosity and acid-rock reaction time and acid solution after seeking acidification are penetrated
Distance finds out the corrosion volume of acid solution；Finally seek out acid solution dosage；
(E2) change to characterize the physical property in pore media caused by rock dissolution, determine the porosity after acidification using following formula
In formula: k --- the permeability after rock is acidified, mD；
--- the porosity after rock is acidified；
(E3) required reaction time when seeking that acid solution is reacted completely in acidization using acid liquid reaction rate equation formula；
In formula: C --- acid strength, mol/L；
J --- acid-rock reaction rate, mol/ (cm2s)；
V0--- acid solution volume, L；
The surface area of S --- disk, cm2；
T --- acid-rock reaction time, s；
To seek acid solution dosage, solved using iterative method；Wherein, acid solution dosage V1；
(E4) go out earthworm hole equivalent redius during Carbonate acidizing using equations, be the EFFECTIVE RANGE of acid solution；
In formula: b --- experimental constant is obtained by experiment；
The molal weight of M --- rock；kg/mol；
Df --- the fractal dimension in earthworm hole；
D --- diffusion constant；
Q --- acid solution injection rate or discharge capacity, m/s；
The density of ρ --- rock, kg/m3；
α --- solubility factor, g/mol；
(E5) it is molten to be equal to acid-rock reaction for the variation to acid solution operating distance range internal porosity in the t time is reacted completely in acid solution
The rock volume of erosion is
In formula: L --- horizontal well length, m；
(E6) acid solution dosage is sought using solubility factor
V=VRock/X20
In formula: V --- the acid solution dosage sought, L；
X20--- volume dissolving power；
Acid solution dosage V1 is compared with the acid solution dosage V sought, when error is less than 0.005, acid solution dosage is finally to seek
As a result.
3. a kind of terminal, which is characterized in that the terminal, which is at least carried, realizes Gas Reservoir Water described in claim 1~2 any one
The controller of horizontal well segmenting perforating and acidification transformation parameter optimization method.
4. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer is executed as weighed
Benefit requires Horizontal Wells For Gas Reservoirs segmenting perforating described in 1-2 any one and acidification transformation parameter optimization method.
5. Horizontal Wells For Gas Reservoirs segmenting perforating described in a kind of realization claim 1~2 any one and acidification transformation parameter optimization side
The Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization control system of method, which is characterized in that the Horizontal Wells For Gas Reservoirs point
Section perforation and acidification transformation parameter optimization control system include:
Horizontal well in segments unit for being segmented to horizontal well, and obtains every section of permeability, porosity data；
The pressure difference acquiring unit of the gas-producing profile of each perforated interval and each interval, for according to each section of permeability of horizontal well
According to, inject acid when obtain the gas-producing profile of each perforated interval and the pressure difference of each interval；
Perforating parameter optimizes unit, for the difference of permeability, when causing gas-producing profile otherness larger, according to yield and pressure
Poor parameter carries out the optimization of perforating parameter；
Assuming that the Permeability Distribution scheme unit after 3 groups of acidifications, for considering in the integrated parameter optimization of perforation-acidification
The influence of acid-rock reaction makes gas-producing profile constantly change when permeability increases after acidification, takes after assuming 3 groups of acidifications
Permeability Distribution scheme；
Permeability Distribution scheme optimization unit, for finding out each interval respectively using 3 groups of Permeability Distribution schemes after assuming
Gas-producing profile, judge which kind of scheme makes gas-producing profile more evenly, and production capacity is big, optimization Permeability Distribution scheme；
Each close acquiring unit in interval hole optimizes for perforating parameter；According to the acid solution usage data of each interval, Pressure difference distribution
And the distribution of original permeability, calculate the Kong Mi of each interval.
6. a kind of at least carry Horizontal Wells For Gas Reservoirs segmenting perforating described in claim 5 and be acidified transformation parameter optimization control system
Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811427785.5A CN109236254B (en) | 2018-11-27 | 2018-11-27 | A kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811427785.5A CN109236254B (en) | 2018-11-27 | 2018-11-27 | A kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236254A CN109236254A (en) | 2019-01-18 |
| CN109236254B true CN109236254B (en) | 2019-07-19 |
Family
ID=65074177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811427785.5A Expired - Fee Related CN109236254B (en) | 2018-11-27 | 2018-11-27 | A kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109236254B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963108B (en) * | 2019-05-20 | 2022-07-05 | 中国石油天然气股份有限公司 | Method for determining acid liquor consumption in gas well blockage removal process |
| CN114059988B (en) * | 2021-12-29 | 2023-06-06 | 成都北方石油勘探开发技术有限公司 | Sectional acidification method and system for open hole horizontal well |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8418761B2 (en) * | 2010-07-29 | 2013-04-16 | Halliburton Energy Services, Inc. | Stimuli-responsive high viscosity pill |
| CN107229989B (en) * | 2016-03-25 | 2020-09-18 | 中国石油化工股份有限公司 | Horizontal well staged fracturing cluster perforation scheme optimization method |
| CN108442911A (en) * | 2018-02-28 | 2018-08-24 | 西南石油大学 | A kind of shale gas horizontal well refracturing hydraulic fracture method for optimally designing parameters |
-
2018
- 2018-11-27 CN CN201811427785.5A patent/CN109236254B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN109236254A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110608024B (en) | Volume fracturing method for improving filling efficiency of micro-support system by deep shale gas | |
| CN105626006B (en) | Low-permeability oil deposit CO2Drive technical limit well space and determine method | |
| CN104695928B (en) | Method for evaluating volume transformation capacity of vertical well of fractured tight oil reservoir | |
| CN109236254B (en) | A kind of Horizontal Wells For Gas Reservoirs segmenting perforating and acidification transformation parameter optimization method and system | |
| CN110242271B (en) | Water-control fracturing yield-increasing method for bottom water-gas layer | |
| CN103527161B (en) | The method of horizontal well thermal recovery water plugging and profile controlling | |
| CN105317407B (en) | A kind of development approach of ultra-high water cut stage Untabulated reservoirs | |
| CN109538181A (en) | Improve the optimization method of side water heavy crude reservoir Simulation on whole pay zones effect | |
| CN110410045A (en) | A kind of stifled tune method for ultra-high water cut stage oil reservoir | |
| Chen et al. | Improving Polymerflood Performance Via Streamline-Based Rate Optimization: Mangala Field, India | |
| CN109296363B (en) | Ultra-low permeability reservoir carbon dioxide flooding initial-stage capacity prediction method | |
| CN107451671B (en) | Method and system for predicting initial capacity of shale formation after fracturing | |
| CN104533371A (en) | Asymmetrical three-dimensional fracturing method for horizontal well | |
| CN115749703A (en) | CO injection 2 Method for improving extraction degree of heterogeneous bottom water gas reservoir through huff and puff | |
| CN110397436A (en) | A kind of stifled feasibility analysis method and system of oil reservoir tune | |
| CA3141850C (en) | Highly efficient acid-distributing method considering spatio-temporal distribution characteristics of acid corrosion crack conductivity | |
| CN111927413B (en) | Method for determining reasonable bottom hole pressure of constant-pressure injection of polymer injection well | |
| CN111188613B (en) | Method and system for determining well control radius of tight gas reservoir gas well | |
| CN115205062A (en) | Method for calculating optimal water injection rate of reservoir pressure flooding development | |
| CN107989581A (en) | A kind of method and its verification method for improving High water cut densification Recovery of Gas Condensate Reservoirs | |
| CN111364955A (en) | Method for simulating flow field evolution between injection wells and production wells | |
| CN114429085A (en) | Method and system for analyzing fluid potential of fracture-cavity type oil reservoir | |
| CN115618581B (en) | Polymer gel selective water shutoff design method for multistage fracturing horizontal well | |
| CN115471351A (en) | Method and device for quantitatively determining water coming from deep-layer dissolved-fluid reservoir | |
| CN117552781A (en) | Method and device for predicting productivity of carbon dioxide huff and puff exploitation |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190719 Termination date: 20191127 |