CN106761718A - Determine that mid-deep strata oil reservoir employs the new method of thickness limit - Google Patents
Determine that mid-deep strata oil reservoir employs the new method of thickness limit Download PDFInfo
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- CN106761718A CN106761718A CN201510823841.7A CN201510823841A CN106761718A CN 106761718 A CN106761718 A CN 106761718A CN 201510823841 A CN201510823841 A CN 201510823841A CN 106761718 A CN106761718 A CN 106761718A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 39
- 239000003129 oil well Substances 0.000 claims abstract description 34
- 239000003921 oil Substances 0.000 claims description 64
- 238000005553 drilling Methods 0.000 claims description 7
- 238000005457 optimization Methods 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 6
- 239000010779 crude oil Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011234 economic evaluation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The present invention provides the new method that a kind of determination mid-deep strata oil reservoir employs thickness limit, and its method includes：Step 1, according to the gross investment for being related to oil well individual well in oil reservoir, calculates nature and goes into operation and the economic limit primiparity under two kinds of tender budgets of fracturing production；Step 2, geologic feature and the effective thickness statistics according to oil reservoir, preferably goes out typical oil well, sets up related numerical model, and individual layer employs the initial production employed with multilayer build-up when predicting the different effective thickness under two kinds of tender budgets；Step 3, count the corresponding number of plies of initial production more than economic limit primiparity and effective thickness, and as mid-deep strata oil reservoir employs thickness limit.The new method application that the determination mid-deep strata oil reservoir employs thickness limit is easy, for mid-deep strata oil reservoir determines that employing effective thickness boundary, raising reserves exploitation rate provides reliable screening technique.
Description
Technical field
The present invention relates to the effective exploitation technology field of mid-deep strata oil reservoir, a kind of determination is especially related to
Mid-deep strata oil reservoir employs the new method of thickness limit.
Background technology
Mid-deep strata 2500~3500m of reservoir buried depth, typically develops 1~3 oil reservoir on longitudinal direction, reservoir belongs to
Middle hyposmosis, air permeability is typically 10~100 × 10-3μm2, the good reservoir oil well of physical property throws naturally
Product just can obtain initial productivity high, and the poor reservoir oil well fracturing production of physical property can also obtain higher
Initial productivity.Because mid-deep strata oil reservoir development is influenceed by investment and economic evaluation index, therefore production capacity
The reqirement of compilation of scheme improves reserves exploitation rate to greatest extent, improves a key of reserves exploitation rate
It is to determine the rational limit well spacing thickness of oil reservoir.The limit well spacing thickness of oil reservoir is generally by economic pole
Limit primiparity is tried to achieve divided by average rice productivity index, but for shallow sea mid-deep strata oil reservoir, the method is obvious
There is following 2 deficiencies：1. individual layer is not distinguished to employ and the difference between multilayer build-up is employed；②
The difference for employing thickness limit that wellfracturing is gone into operation and gone into operation naturally is not accounted for.This is resulted in generally
The demand that the limit well spacing thickness asked for is employed with oil reservoir maximum reserves is not corresponded, therefore in the urgent need to adopting
Reservoir reserve use rate is improved with new technical method.It is this we have invented deep in a kind of new determination
Layer oil reservoir employs the new method of thickness limit, solves above technical problem.
The content of the invention
Effectively thickness is employed under it is an object of the invention to provide a kind of solution oil well difference tender budget
The determination of boundary, realize oil reservoir employ thickness screening and assessment work standardization, standardization purpose really
Determine the new method that mid-deep strata oil reservoir employs thickness limit.
The purpose of the present invention can be achieved by the following technical measures：Determine that mid-deep strata oil reservoir employs thickness
The new method of boundary, the new method that the determination mid-deep strata oil reservoir employs thickness limit includes：Step 1,
According to the gross investment for being related to oil well individual well in oil reservoir, calculate nature and go into operation and two kinds of operation sides of fracturing production
Economic limit primiparity under formula；Step 2, geologic feature and the effective thickness statistics according to oil reservoir is excellent
Typical oil well is selected, related numerical model is set up, the difference under two kinds of tender budgets of prediction is effectively thick
Individual layer employs the initial production employed with multilayer build-up when spending；Step 3, counts in economic limit primiparity
More than the initial production corresponding number of plies and effective thickness, as mid-deep strata oil reservoir employs thickness circle
Limit.
The purpose of the present invention can also be achieved by the following technical measures：
In step 1, the gross investment of oil well individual well is related in oil reservoir includes individual well drilling well investment, individual well
Invest and individual well operation expense on ground.
In step 1, calculate nature and go into operation with the formula of the economic limit primiparity under fracturing production and be：
In above formula, Ib+Id+IeIt is individual well drilling well investment+individual well ground investment+individual well operation expense, O
It is ton oil operating cost, TAX is ton oil sale tax, PoIt is oil price, ERIt is recovery percent of reserves, R is loan profit
Rate, T is the evaluation time limit, DcTo evaluate phase lapse rate, τORate during to recover the oil, α is crude oil commodity rate,
β is oil well coefficient.
In step 2, natural brought in well it is actual employ thickness statistics on the basis of, preferably go out typical case
Well, is bored based on oil well and meets effective thickness and initial production situation, devises the numerical model of correlation,
After being fitted to its initial production situation, employ dynamic with multilayer build-up by numerical Simulation Prediction individual layer
Used time difference effective thickness under initial production, integrated economics limit primiparity, determine its individual layer employ and
Multilayer build-up employs the number of plies and effective thickness boundary, and effective thickness is employed so as to obtain nature operation oil well
Degree boundary.
In step 2, after the individual layer that optimization obtains wellfracturing operation employs effective thickness boundary,
The optimization that multilayer build-up employs effective thickness boundary does not reach nature throwing for multilayer build-up effective thickness
The statistics but individual layer of product employ effective thickness meet fracturing production individual layer employ effective thickness boundary lead to
Cross numerical simulation and total effective thickness is employed and individual layer effective thickness is further optimized to overlapping, from
And obtain fracturing production oil well employ effective thickness boundary.
In step 3, simply merge under two kinds of tender budgets and employ effective thickness boundary, you can
Effective thickness boundary is employed to mid-deep strata oil reservoir.
Determination mid-deep strata oil reservoir in the present invention employs the new method of thickness limit, including obtains mid-deep strata
The individual well gross investment (individual well drilling well investment, the investment of individual well ground and individual well operation expense) of oil reservoir, meter
Nature is calculated to go into operation and the economic limit primiparity under fracturing production；Based on reservoir geologic character and oil of having gone into operation
The production status analysis of well, preferably goes out typical oil well, numerical reservoir model is set up, to typical oil well
Initial production situation is fitted；It is single using the difference under the two kinds of tender budgets of model prediction after fitting
Layer employs the initial stage that initial production under effective thickness and the different numbers of plies and overlapping are employed under effective thickness
Yield；The corresponding number of plies of initial production and effective thickness more than economic limit primiparity are counted, as
Mid-deep strata oil reservoir employs thickness limit.The method application is easy, is that mid-deep strata oil reservoir determines to have employed
Effect thickness limit, raising reserves exploitation rate provide reliable screening technique.
Brief description of the drawings
Fig. 1 is a specific implementation of the new method that determination mid-deep strata oil reservoir of the invention employs thickness limit
The flow chart of example；
Fig. 2 is individual well under chengdao oilfield reservoirs of Dongying formation difference oil price in a specific embodiment of the invention
Economic limit primiparity schematic diagram when going into operation naturally；
Fig. 3 is oil well when the individual layer predicted using numerical model in a specific embodiment of the invention is employed
Natural production capacity and effective thickness relation curve；
Fig. 4 is oil well when the multilayer predicted using numerical model in a specific embodiment of the invention is employed
Natural production capacity and effective thickness relation curve；
Fig. 5 is individual well under chengdao oilfield reservoirs of Dongying formation difference oil price in a specific embodiment of the invention
Economic limit primiparity schematic diagram during fracturing production；
Fig. 6 is oil well when the multilayer predicted using numerical model in a specific embodiment of the invention is employed
Natural production capacity and effective thickness relation curve.
Specific embodiment
It is cited below particularly to enable above and other objects, features and advantages of the invention to become apparent
Go out preferred embodiment, and coordinate shown in accompanying drawing, be described in detail below.
As shown in figure 1, Fig. 1 is the new method that determination mid-deep strata oil reservoir of the invention employs thickness limit
Flow chart.
In step 101, individual well gross investment (individual well drilling well investment, the individual well ground of mid-deep strata oil reservoir are obtained
Invest and individual well operation expense in face), according to the gross investment for being related to oil well individual well in oil reservoir, calculate nature
Go into operation and the economic limit primiparity under fracturing production；Computing formula is：
In above formula, Ib+Id+IeIt is individual well drilling well investment+individual well ground investment+individual well operation expense, O
It is ton oil operating cost, TAX is ton oil sale tax, PoIt is oil price, ERIt is recovery percent of reserves, R is loan profit
Rate, T is the evaluation time limit, DcTo evaluate phase lapse rate, τORate during to recover the oil, α is crude oil commodity rate,
β is oil well coefficient.As shown in Fig. 2 being chengdao oilfield Dongying Formation oil in a specific embodiment of the invention
Hide individual well economic limit primiparity under different oil prices.
In step 102, natural brought in well is actual employ thickness statistics on the basis of, preferably go out typical case
Well, is bored based on oil well and meets effective thickness and initial production situation, devises the numerical model of correlation,
After being fitted to its initial production situation, employ dynamic with multilayer build-up by numerical Simulation Prediction individual layer
Initial production under used time difference effective thickness, as shown in Figure 3 and Figure 4, integrated economics limit primiparity,
Determine that its individual layer is employed and employ the number of plies and effective thickness boundary with multilayer build-up, gone into operation so as to obtain nature
Oil well employs effective thickness boundary, as shown in table 1：
Table 1 natural operation oil well employs effective thickness boundary table
In step 103, because current mid-deep strata oil reservoir implements individual layer pressure break substantially, even if therefore oil well
Bored on longitudinal direction and meet multiple oil reservoirs, initial stage oil-yielding stratum is essentially pressure break oil reservoir after wellfracturing.Optimizing
After the individual layer gone into operation to wellfracturing employs effective thickness boundary, as shown in figure 5, multilayer build-up is employed
The optimization of effective thickness boundary mainly for multilayer build-up effective thickness do not reach nature operation statistics,
But individual layer employs effective thickness and meets the individual layer of fracturing production and employs effective thickness boundary by Numerical-Mode
Intend employing total effective thickness to overlapping and individual layer effective thickness is further optimized, as shown in fig. 6,
Effective thickness boundary is employed so as to obtain fracturing production oil well, as shown in table 2：
Table 2 fracturing production oil well employs effective thickness boundary table
In step 104, with its corresponding economic limit primiparity as threshold value, two kinds of operation sides are filtered out
Individual layer under formula employs the economical and effective thickness limit employed with multilayer build-up.It is simple to merge two kinds of operations
Effective thickness boundary is employed under mode, you can obtain mid-deep strata oil reservoir employs effective thickness boundary,
As shown in table 3：
Table 3 mid-deep strata oil reservoir employs effective thickness boundary
Determination mid-deep strata oil reservoir in the present invention employs the new method of thickness limit, and middle depth is calculated first
The economic limit primiparity (gone into operation naturally and fracturing production) under layer two kinds of tender budget of oil reservoir；In being based on
The dynamic analysis of the geologic feature of Deep Reservoirs and typical oil well, devises the numerical model of correlation, leads to
Numerical simulation study and integrated economics limit primiparity are crossed, to individual layer and multilayer build-up under two kinds of tender budgets
Employ effective thickness boundary to optimize, so as to show that mid-deep strata oil reservoir employs thickness limit.The method
The determination for effectively employing thickness limit under oil well difference tender budget is solved, realizes that oil reservoir employs thickness
Screening and assessment work standardization, the purpose of standardization.
Claims (6)
1. determine that mid-deep strata oil reservoir employs the new method of thickness limit, it is characterised in that the determination mid-deep strata oil reservoir employs thickness circle
The new method of limit includes：
Step 1, according to the gross investment for being related to oil well individual well in oil reservoir, calculates under nature operation and two kinds of tender budgets of fracturing production
Economic limit primiparity；
Step 2, geologic feature and the effective thickness statistics according to oil reservoir, preferably goes out typical oil well, sets up related numerical model,
Individual layer employs the initial production employed with multilayer build-up when predicting the different effective thickness under two kinds of tender budgets；
Step 3, the initial production corresponding number of plies and effective thickness of the statistics more than economic limit primiparity, as mid-deep strata oil reservoir
Employ thickness limit.
2. it is according to claim 1 to determine the new method that mid-deep strata oil reservoir employs thickness limit, it is characterised in that in step 1
In, the gross investment of oil well individual well is related in oil reservoir includes individual well drilling well investment, the investment of individual well ground and individual well operation expense.
3. it is according to claim 2 to determine the new method that mid-deep strata oil reservoir employs thickness limit, it is characterised in that in step 1
In, the formula for calculating the economic limit primiparity under nature operation and fracturing production is：
In above formula, Ib+Id+IeIt is individual well drilling well investment+individual well ground investment+individual well operation expense, O is ton oil operating cost, and TAX is
The oily sale tax of ton, PoIt is oil price, ERIt is recovery percent of reserves, R is loan interest rate, and T is the evaluation time limit, DcTo evaluate phase lapse rate,
τORate during to recover the oil, α is crude oil commodity rate, and β is oil well coefficient.
4. it is according to claim 1 to determine the new method that mid-deep strata oil reservoir employs thickness limit, it is characterised in that in step 2
In, natural brought in well it is actual employ thickness statistics on the basis of, preferably go out typical well, based on oil well bore meet effective thickness
With initial production situation, the numerical model of correlation is devised, after being fitted to its initial production situation, by numerical value
Simulation and forecast individual layer employs the initial production under different effective thickness when being employed with multilayer build-up, integrated economics limit primiparity,
Determine that its individual layer is employed and employ the number of plies and effective thickness boundary with multilayer build-up, so as to obtain having employed for nature operation oil well
Effect thickness limit.
5. it is according to claim 1 to determine the new method that mid-deep strata oil reservoir employs thickness limit, it is characterised in that in step 2
In, after the individual layer that optimization obtains wellfracturing operation employs effective thickness boundary, multilayer build-up employs effective thickness boundary
Optimization for multilayer build-up effective thickness do not reach nature operation statistics but individual layer employ effective thickness meet pressure break throwing
The individual layer of product employs effective thickness boundary total effective thickness and individual layer effective thickness is employed to overlapping by numerical simulation and enters to advance
The optimization of one step, effective thickness boundary is employed so as to obtain fracturing production oil well.
6. it is according to claim 1 to determine the new method that mid-deep strata oil reservoir employs thickness limit, it is characterised in that
In step 3, simply merge under two kinds of tender budgets and employ effective thickness boundary, you can obtain having employed for mid-deep strata oil reservoir
Effect thickness limit.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110284860A (en) * | 2019-07-19 | 2019-09-27 | 中国石油化工股份有限公司 | Blocky thick-layer sandstone oil reservoir note adopts interactive artificial inclination angle CO2Flooding method |
| CN111472763A (en) * | 2019-12-30 | 2020-07-31 | 北京国双科技有限公司 | Stratum thickness prediction method and device |
| CN112647916A (en) * | 2020-12-22 | 2021-04-13 | 中海石油(中国)有限公司 | Well selecting and layer selecting method and system for offshore low-permeability oilfield fracturing technology |
| CN113850007A (en) * | 2021-11-30 | 2021-12-28 | 浙江中自庆安新能源技术有限公司 | Method and system for predicting thickness of effective oil layer of oil reservoir based on finite element analysis |
| CN114961711A (en) * | 2021-02-24 | 2022-08-30 | 中国石油化工股份有限公司 | Method for determining effective thickness limit in low-permeability reservoir reserve calculation |
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| CN110284860A (en) * | 2019-07-19 | 2019-09-27 | 中国石油化工股份有限公司 | Blocky thick-layer sandstone oil reservoir note adopts interactive artificial inclination angle CO2Flooding method |
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| CN113850007A (en) * | 2021-11-30 | 2021-12-28 | 浙江中自庆安新能源技术有限公司 | Method and system for predicting thickness of effective oil layer of oil reservoir based on finite element analysis |
| CN113850007B (en) * | 2021-11-30 | 2022-03-11 | 浙江中自庆安新能源技术有限公司 | Method and system for predicting thickness of effective oil layer of oil reservoir based on finite element analysis |
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