CN109858075B - A kind of oil well delamination production split method based on unsteady flow - Google Patents
A kind of oil well delamination production split method based on unsteady flow Download PDFInfo
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Abstract
A kind of oil well delamination production split method based on unsteady flow can solve tradition and split that point method applicability is poor, computationally intensive technical problem.Comprising steps of S100, determining that static state splits a point coefficient；Individual well perforation data are generated static state according to individual well result of log interpretation and perforation thickness and are split a point coefficient by layering result playback；S200, determine that individual well section splits a point coefficient；After being playbacked according to production profile data by layering, generates section and split a point coefficient；S300, point coefficient is split according to static state and section splits a point coefficient, determines dynamic splitting coefficient.Oil well delamination production split method based on unsteady flow of the invention has the advantages that 1. realizing that individual well produces inhales " coupling " of section and split point, and method is rationally effective, can meet the accuracy requirement of remaining oil research technology；2. method is simple, easily operated, generalization is strong；3. the energy effectively save working time, greatly improving working efficiency relative to method of numerical simulation.
Description
Technical field
The present invention relates to oil field development fields, and in particular to a kind of oil well delamination production split side based on unsteady flow
Method.
Background technique
China's oil reservoir belongs to continental reservoir mostly, and, heterogeneity more with oil reservoir is by force main feature.With oil field development
The continuous propulsion of process, developed field have integrally entered " double height " stage of High water cut, high recovery percent of reserves, remaining oil height
Dispersion.It is influenced by reservoir and developing value, in the process of development the producing status difference of all kinds of reservoirs of oil reservoir
Significantly, get clear all kinds of reservoirs producing status and remaining oil and its distribution, be epistemically descend contradiction, raising of adopting an effective measure
The key problem that the needs of recovery ratio solve.
Oil well production is often commingling production, and there are four types of conventional production split methods:
1, Kh (formation capacity) or h (small thickness) split point-score: the section yield weaker suitable for reservoir heterogeneity is split
Point, method applicability is low；Consider that the KHK production split method of substratum permeability and thickness and relative permeability can solve initial stage
Production split in the case of different oil saturations；
2, produce and inhale section plane test method: to inhale section plane test data be according to split point to produce, and tested person data abundance is conciliate
The limitation of precision is released, often production method, test technology, explanation means have an impact to a point result is split.Meanwhile production history
Long, the situations such as the perforation number of plies is more, measure is frequent increase the difficulty split point, and the data volume and amount of calculation of process are big, it is difficult to
It realizes and quickly splits point；
3, dynamical equation splits point-score: according to the water power principle of similitude, centered on water injection well, calculating each around each substratum of water injection well
The filtrational resistance coefficient in oil well direction adopts connected relation based on single sand body (injection-production well) note, calculates water injection well layering injection rate, life
Produce well separated layer oil production rate；
4, chart method: it is for statistical analysis to the dynamic and static parameters relationship of oil reservoir, relevance parameter plate is established, shadow is found out
The production apparent parameter of feature, such as effective thickness (or sandstone thickness) h, porosity φ, permeability K or formation capacity Kh are rung,
The highest parameter of correlation is selected to carry out production split calculating；
5, Method for Numerical: algorithm is accurate but the history matching for production time is longer, by grid node size-dependence.
Coupling refers to that two or more entities interdepend in one of other side measurement, be commonly used in communication, software,
The fields such as mechanical engineering, if if there is a kind of interaction, interactional relationship, this relationship between certain two things
With regard to title " coupled relation ".The section plane test data of oil-water well shows in process of production, the yield of layering, water absorption size and
(mainly permeability k), thickness (h) correlation are higher, and there are a kind of coupled relations for the physical property of layering.
Summary of the invention
A kind of oil well delamination production split method based on unsteady flow proposed by the present invention, can solve tradition and split a point method
Bad adaptability, computationally intensive technical problem.
To achieve the above object, the invention adopts the following technical scheme:
A kind of oil well delamination production split method based on unsteady flow, comprising the following steps:
S100, determine that static state splits a point coefficient；
Individual well perforation data are generated static state according to individual well result of log interpretation and perforation thickness and are split point by layering result playback
Coefficient；
S200, determine that individual well section splits a point coefficient；
After being playbacked according to production profile data by layering, generates section and split a point coefficient；
S300, point coefficient is split according to static state and section splits a point coefficient, determines dynamic splitting coefficient.
It is specific as follows:
Assuming that certain well has T in history production process1、T2、T3Three producing profile testings are as a result, production time started note
For TIt opens, production the end time be denoted as TEnd, then the well production history can be divided into three phases:
(1) only there is the T of test data after certain time pointIt opens~T1Period；
(2) there is the T of test data before and after certain time point1~T2、T2~T3Period；
(3) only there is the T of test data before certain time point3~TEndPeriod；
Then TIt opens~T1、T3~TEndThe production split method of period specifically includes:
Chronomere is the moon, TIt opensPoint coefficient of splitting of time is determined that it is f that note, which splits point coefficient, by formation capacity khkh, T1Moment produces
The production split coefficient that liquid section determines is fcy,
In the time by TIt opensIt is transitioned into T1During, hierarchical production is split the case where point result gradually reflects to production profile and is leaned on
Hold together, formation capacity influence gradually weakens, and production profile influence gradually increases；
Time is by T3It is transitioned into TEndDuring, formation capacity influence gradually increases, and production profile influence gradually weakens, and builds
Vertical hierarchical production dynamic accounting equation is as follows:
In formula, QiA point rear monthly output, t/mon are split in-layering；Q-well head monthly output, t/mon；I-influential factors of yield is passed
Subtract percentage, %；Certain production time point of j-is apart from nearest producing profile testing point months；fkh- determined by formation capacity
Split a point coefficient；fcy- by what production profile determined split a point coefficient；f1Nearest production profile determines before-certain production time point
Split a point coefficient；f2What nearest production profile determined after-certain production time point splits a minute coefficient.
Equation (1) has comprehensively considered the influence for changing over time formation capacity and production profile weight to oil well output, raw
The production time gap producing profile testing time is remoter, and weight shared by production profile is smaller, until production profile loses weight coefficient.
Further, the production split method of production profile data specifically includes before and after certain time point:
Remember T1It is f that point coefficient is split in moment layering1, T2It is f that point coefficient is split in moment layering2, by time point T1It is transitioned into T2Mistake
Cheng Zhong, layering split point coefficient by f1Become f2It is considered as the process of approximate gradual change, dynamic accounting equation are as follows:
In formula, f1What nearest production profile determined before-certain production time point splits a minute coefficient；f2After-certain production time point
What nearest production profile determined splits a point coefficient；Months interval between two producing profile testing time points of m-；Certain production of n-
Time point production profile months nearest apart from front.
As shown from the above technical solution, a kind of oil well delamination production split method based on unsteady flow of the invention can divide
For the following three steps:
1) determine that static state splits a point coefficient: individual well perforation data by layering result playback, according to individual well result of log interpretation and
Perforation thickness generates static state and splits a point coefficient；
2) it determines that individual well section splits a point coefficient: after being playbacked according to production profile data by layering, generating section and split a point coefficient；
3) determine dynamic splitting coefficient: the head and the tail stage split point with formula (1) algorithm, and the intermediate stage is with formula (2) calculation
Method is split point.
The layered absorbent amount of water injection well split it is point consistent with producing well method, to improve working efficiency and quality, the above calculating
Algorithm is programmable to be realized.
Oil well delamination production split method based on unsteady flow of the invention has the advantages that
1. realizing that individual well produces to inhale " coupling " of section and split point, method is rationally effective, can meet the precision need of remaining oil research technology
It asks；
2. method is simple, easily operated, generalization is strong；
3. the energy effectively save working time, greatly improving working efficiency relative to method of numerical simulation.
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is that the substratum Yield changes of the embodiment of the present invention split a point schematic illustration；
Fig. 3 is the individual well hierarchical production dynamic splitting result of the embodiment of the present invention；
Fig. 4 be the embodiment of the present invention unsteady flow production split after layering remaining geologic reserves and numerical simulation result pair
Compare histogram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
As shown in Figure 1, the oil well delamination production split method described in the embodiment of the present invention based on unsteady flow, including with
Lower step:
S100, determine that static state splits a point coefficient；
Individual well perforation data are generated static state according to individual well result of log interpretation and perforation thickness and are split point by layering result playback
Coefficient；
S200, determine that individual well section splits a point coefficient；
After being playbacked according to production profile data by layering, generates section and split a point coefficient；
S300, point coefficient is split according to static state and section splits a point coefficient, determines dynamic splitting coefficient.
It is specific as follows:
Assuming that certain well has T in history production process1、T2、T3Three producing profile testings are as a result, production time started note
For TIt opens, production the end time be denoted as TEnd, then the well production history can be divided into three phases:
(1) only there is the T of test data after certain time pointIt opens~T1Period；
(2) there is the T of test data before and after certain time point1~T2、T2~T3Period；
(3) only there is the T of test data before certain time point3~TEndPeriod；
Then TIt opens~T1、T3~TEndThe production split method of period specifically includes:
Chronomere is the moon, TIt opensPoint coefficient of splitting of time is determined that it is f that note, which splits point coefficient, by formation capacity khkh, T1Moment produces
The production split coefficient that liquid section determines is fcy,
In the time by TIt opensIt is transitioned into T1During, hierarchical production is split the case where point result gradually reflects to production profile and is leaned on
Hold together, formation capacity influence gradually weakens, and production profile influence gradually increases；
Time is by T3It is transitioned into TEndDuring, formation capacity influence gradually increases, and production profile influence gradually weakens, and builds
Vertical hierarchical production dynamic accounting equation is as follows:
In formula, QiA point rear monthly output, t/mon are split in-layering；Q-well head monthly output, t/mon；I-influential factors of yield is passed
Subtract percentage, %；Certain production time point of j-is apart from nearest producing profile testing point months；fkh- determined by formation capacity
Split a point coefficient；fcy- by what production profile determined split a point coefficient；f1Nearest production profile determines before-certain production time point
Split a point coefficient；f2What nearest production profile determined after-certain production time point splits a minute coefficient.
Equation (1) has comprehensively considered the influence for changing over time formation capacity and production profile weight to oil well output, raw
The production time gap producing profile testing time is remoter, and weight shared by production profile is smaller, until production profile loses weight coefficient.
Further, the production split method of production profile data specifically includes before and after certain time point:
Remember T1It is f that point coefficient is split in moment layering1, T2It is f that point coefficient is split in moment layering2, by time point T1It is transitioned into T2Mistake
Cheng Zhong, layering split point coefficient by f1Become f2It is considered as the process of approximate gradual change, dynamic accounting equation are as follows:
In formula, f1What nearest production profile determined before-certain production time point splits a minute coefficient；f2After-certain production time point
What nearest production profile determined splits a point coefficient；Months interval between two producing profile testing time points of m-；Certain production of n-
Time point production profile months nearest apart from front.
It is the concrete application case of the embodiment of the present invention below:
Shown in as shown in Figure 2, Figure 3 and Figure 4, the oil well delamination production split method described in the present embodiment based on unsteady flow,
Based on the upper group oil reservoir of In Karamay Oil pseudo-ginseng Middle East area gram.
It is white that the upper group oil reservoir of In Karamay Oil pseudo-ginseng Middle East area gram is located at the black Thrust belt band of Northwestern Margin of Junggar Basin gram-
Sebkha section lower wall, be fault barrier northwest (NW)~east southeast to monocline, 92 meters~158 meters of formation thickness, section divides 14 single layers,
For mesoporous, the middle strong heterogeneity Conglomerate Reservoir of infiltration, High water cut, high recovery percent of reserves stage has been added in waterflooding extraction at present, but still deposits
In infilling adjustment potentiality.
The verifying of achievement:
When implementing oil reservoir remaining oil, split first using the oil well delamination yield based on unsteady flow described in the present embodiment
Point method has implemented section remaining oil situation.After splitting point, as shown in Fig. 2, can obtain having in research area testing profile producing well with
The hierarchical production of time changes, and calculating individual well layering cumulative oil production, (no testing profile well is split according to neighbouring testing well
Coefficient and oil well classification information summary determination is divided to split a point coefficient), plane marks Area of a well by injection-production relation, is layered
With the plane residual oil distribution of the whole district.
The present embodiment also uses fine method for numerical simulation simultaneously to remaining oil research technology, chooses different portions in the plane
20 mouthfuls of the producing well for having testing profile of position, using the means simulation individual well hierarchical production variation of virtual log, as shown in figure 3, its
Analog result and unsteady flow split a point result matching degree height, and wherein main layer c2, c10, c11 matching degree is relatively higher.Entirely
The cumulative remainder oil in place that area's unsteady flow is split point differs 1.9% with numerical simulation result, the remaining oil enrichment that the two obtains
Rule has a good consistency, but to split point method more rapidly simple and direct for unsteady flow.
It originally is embodiment on the basis of residual production potential meticulous depiction, selected target area is adjusted deployment.Using 200m
Well spacing Five-point method pattern deployment adjustment Jing149Kou, indices are improved after adjustment well is implemented, and individual well day oil-producing, which is compared, to be adjusted
1.7 tons of increase, aqueous to have dropped 13.9 percentage points before whole, and 7.5 percentage points of recovery ratio can be improved after infilling adjustment, and increasing newly can
133.2 ten thousand tons of reserves are adopted, while initial potential of oil-well distribution situation further confirms to obtain based on unsteady flow production split method
The remaining oil understanding arrived is higher with actual conditions degree of agreement.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen within the scope of protection of the present invention.
Claims (2)
1. a kind of oil well delamination production split method based on unsteady flow, it is characterised in that:
The following steps are included:
S100, determine that static state splits a point coefficient；
Individual well perforation data are generated static state and split and point be by layering result playback according to individual well result of log interpretation and perforation thickness
Number；
S200, determine that individual well section splits a point coefficient；
After being playbacked according to production profile data by layering, generates section and split a point coefficient；
S300, point coefficient is split according to static state and section splits a point coefficient, determines dynamic splitting coefficient；
It specifically includes and assumes that certain well has T in history production process1、T2、T3Three producing profile testings are as a result, when production starts
Between be denoted as TIt opens, production the end time be denoted as TEnd, then the well production history can be divided into three phases:
(1) only there is the T of test data after certain time pointIt opens~T1Period；
(2) there is the T of test data before and after certain time point1~T2、T2~T3Period；
(3) only there is the T of test data before certain time point3~TEndPeriod；
Then TIt opens~T1、T3~TEndThe production split method of period specifically includes:
Chronomere is the moon, TIt opensPoint coefficient of splitting of time is determined that it is f that note, which splits point coefficient, by formation capacity khkh, T1Moment produces liquid and cuts open
The production split coefficient that face determines is fcy,
In the time by TIt opensIt is transitioned into T1During, hierarchical production is split the case where point result gradually reflects to production profile and is drawn close, ground
Layer coefficients influence gradually weakens, and production profile influence gradually increases；
Time is by T3It is transitioned into TEndDuring, formation capacity influence gradually increases, and production profile influence gradually weakens, and establishes and divides
Layer Yield changes accounting equation is as follows:
In formula, QiA point rear monthly output, t/mon are split in-layering；Q-well head monthly output, t/mon；I-influential factors of yield successively decreases hundred
Score, %；Certain production time point of j-is apart from nearest producing profile testing point months；fkh- split point by what formation capacity determined
Coefficient；fcy- by what production profile determined split a point coefficient；f1What nearest production profile determined before-certain production time point split minute
Coefficient；f2What nearest production profile determined after-certain production time point splits a minute coefficient.
2. the oil well delamination production split method according to claim 1 based on unsteady flow, it is characterised in that:
Further include that certain time point front and back has the production split method of production profile data to specifically include:
Remember T1It is f that point coefficient is split in moment layering1, T2It is f that point coefficient is split in moment layering2, by time point T1It is transitioned into T2During,
Layering splits point coefficient by f1Become f2It is considered as the process of approximate gradual change, dynamic accounting equation are as follows:
In formula, f1What nearest production profile determined before-certain production time point splits a minute coefficient；f2After-certain production time point recently
Production profile determine split a point coefficient；Months interval between two producing profile testing time points of m-；Certain production time of n-
The point production profile months nearest apart from front.
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| CN110685651B (en) * | 2019-10-14 | 2021-11-30 | 重庆科技学院 | Yield splitting method and system for multilayer commingled production gas well |
| CN110984976B (en) * | 2019-12-20 | 2023-02-28 | 陕西延长石油(集团)有限责任公司研究院 | Yield splitting method for multilayer commingled production gas well |
| CN111608649B (en) * | 2020-05-21 | 2023-04-11 | 中国地质调查局成都地质调查中心 | Method for predicting beneficial area of exogenous supply type shale gas exploration |
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| CN102747991A (en) * | 2011-04-22 | 2012-10-24 | 长江大学 | Method for determining single-layer output of commingled producing well |
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| CN106777651B (en) * | 2016-12-09 | 2021-07-06 | 北京源博科技有限公司 | Oil-water well yield splitting method based on injection-production balance principle |
| CN106600443A (en) * | 2016-12-09 | 2017-04-26 | 北京源博科技有限公司 | Water saturation-based dynamic oil well yield splitting method |
| CN108442921B (en) * | 2018-02-28 | 2022-03-29 | 中国石油天然气集团有限公司 | Oil well yield splitting method considering time variation and interlayer interference |
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| CN101042048A (en) * | 2006-03-24 | 2007-09-26 | 中国石油天然气股份有限公司 | Complicated fault block fluvial facies reservoir oil water well using situation split system |
| CN106150457A (en) * | 2016-06-30 | 2016-11-23 | 中国石油天然气股份有限公司 | A kind of well group synchronizes dispensing and divides the water injection well water injection rate adopted to split a point method and device |
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