CN105649605A - Novel economic policy bound determination method for layer recombination technology - Google Patents
Novel economic policy bound determination method for layer recombination technology Download PDFInfo
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- CN105649605A CN105649605A CN201410643889.5A CN201410643889A CN105649605A CN 105649605 A CN105649605 A CN 105649605A CN 201410643889 A CN201410643889 A CN 201410643889A CN 105649605 A CN105649605 A CN 105649605A
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Abstract
The invention provides a novel economic policy bound determination method for the layer recombination technology. The method includes the steps that firstly, the single well control economic limit recoverable reserves under different well depths and different oil prices are determined; secondly, single well control economic limit geological reverses under different well depths and different oil prices under different recovery ratio increase conditions are considered, wherein the single well control economic limit geological reverses correspond to the single well control economic limit recoverable reserves; thirdly, the effective drive radius of the reverses is determined, and the corresponding effective thickness is determined according to the relation of the single well control residual geological reserves, the well spacing and the effective thickness; and fourthly, the single well control economic limit geological reserves obtained in the second step are matched with the single well control residual geological reserves obtained in the third step, and the recovery rate increase range under different effective thickness and well spacing combinations and different oil prices is determined. By the adoption of the novel economic policy limit determination method for the layer recombination technology, the technological policy of the economic concept is introduced, the number of formed layer recombination schemes is reduced greatly, working quality is improved, and working benefits are increased.
Description
Technical field
The present invention relates to oil-field development technical field, particularly relate to the defining method of main technology, economic target in mining site series of strata restructuring modification scenario.
Background technology
The adjacent substratum of series of strata recombinant technology abandoning tradition closes on the principle being combined into a set of exploitation series of strata, according to the static geologic feature of reservoir, dynamically remaining oil distribution situation, the close substratum of physical property (rhythmite) is adopted to be combined into the Similar Composite Systems principle of a set of exploitation series of strata, the main force, non-main force substratum (rhythmite) are carried out optimum combination again, realize the target slowing down interlayer interference, equilibrium displacement, improve effect of reservoir development further.
The core of series of strata recombinant technology is normally determined permeability grade, the viscosity multiple number of plies poor, little, is produced the technical limits of the indexs such as thickness. Work out developing adjustment scheme according to technical limits, then carry out evaluation of economic benefit. In fact this way is a kind of method of exhaustion, and namely different substratum (rhythmite) is combined to form many cover series of strata reorganization schemes, carries out technique effect and evaluation of economic benefit respectively, it is preferable that improve recovery percent of reserves height, good in economic efficiency scheme as target protocol. It thus is seen that workload is very big, human and material resources, the financial resources of consumption certainly will be a lot. We have invented a kind of new series of strata recombinant technology economic policy boundary for this reason and determine novel method, solve above technical problem.
Summary of the invention
It is an object of the invention to provide the technical policy circle defining method just introducing economic concept in a kind of policy demarcation line deterministic process, greatly reduce the series of strata reorganization scheme quantity of formation, it is to increase the quality and benefits of work.
The object of the present invention realizes by following technical measures: series of strata recombinant technology economic policy boundary determines novel method, this series of strata recombinant technology economic policy boundary determines that novel method comprises: step 1, it is determined that single well-controlled economic limit workable reserve under different well depth, different oil price;Step 2, it is contemplated that in different recovery ratio amplification situation, the single well-controlled economic limit geologic reserve under the different well depths corresponding from single well-controlled economic limit workable reserve, different oil price; Step 3, it is determined that the effective driving radius of reservoir, according to the relation of single well-controlled remaining geologic reserves and well spacing, net thickness, it is determined that corresponding net thickness; And step 4, the single well-controlled economic limit geologic reserve in step 2 is mated mutually with the single well-controlled remaining geologic reserves in step 3, it is determined that under different net thickness and well spacing combine, under different oil price, improve the amplitude of recovery ratio.
The object of the present invention also realizes by following technical measures:
In step 1, according to input-output Profit and loss balance principle, set up well depth and single well-controlled economic limit workable reserve Core analysis, it is determined that the single well-controlled economic limit workable reserve under different well depth, different oil price.
In step 2, under the prerequisite of known single well-controlled economic limit workable reserve, it is assumed that recovery ratio amplification, single well-controlled economic limit geologic reserve when calculating certain recovery ratio amplification according to formula 1:
In formula, Nd-single well-controlled economic limit geologic reserve, 104T/ mouth;
Np-single well-controlled economic limit workable reserve, 104T/ mouth;
ER-recovery ratio, decimal;
��ER-recovery ratio increasing degree, decimal;
R-recovery percent of reserves, decimal.
In step 3, according to single well-controlled economic limit geologic reserve, the different well spacing being met under single well-controlled economic limit geologic reserve according to formula 2 and the combination of net thickness:
Nd=D �� h �� a2(formula 2)
In formula, D-is mono-stores up coefficient, 104t/Km2.m;
H-reservoir net thickness, m;
A-well spacing, m;
The index that single well-controlled economic limit geologic reserve is corresponding is single well-controlled remaining geologic reserves Nn, its expression formula is:
Nn=D �� (1-R) �� h �� a2(formula 3)
In formula, Nn-single well-controlled remaining geologic reserves, 104T;
Obtain effective driving radius of oil reservoir according to experimental formula, well test data, according to formula 3, corresponding reservoir net thickness can be obtained.
In step 4, single well-controlled economic limit geologic reserve in step 2 and the single well-controlled remaining geologic reserves in step 3 are contrasted, when judging this net thickness and well spacing, whether single well-controlled residual recoverable reserves is more than or equal to single well-controlled economic limit workable reserve, meet net thickness and the well spacing combination of this condition, can obtain improving accordingly recovery ratio amplitude.
Series of strata recombinant technology economic policy boundary in the present invention determines novel method, just introduces the technical policy circle defining method of economic concept in policy demarcation line deterministic process, greatly reduces the series of strata reorganization scheme quantity of formation, it is to increase the quality and benefits of work.
Accompanying drawing explanation
Fig. 1 is the schema that the series of strata recombinant technology economic policy boundary of the present invention determines a specific embodiment of novel method;
Fig. 2 is the well depth drilling depth in a specific embodiment of the present invention and individual well economic limit workable reserve relation curve;
Fig. 3 is the individual well economic limit geologic reserve in a specific embodiment of the present invention and recovery ratio amplification relation curve;
Fig. 4 is the well spacing under the different recovery ratio increase rates in a specific embodiment of the present invention and net thickness graph of a relation.
Embodiment
For making above and other object, the feature and advantage of the present invention become apparent, cited below particularly go out better embodiment, and coordinate institute's accompanying drawings, be described in detail below.
As shown in Figure 1, Fig. 1 is the schema that the series of strata recombinant technology economic policy boundary of the present invention determines novel method.
In a step 101, it is determined that single well-controlled economic limit workable reserve under different well depth, different oil price. According to input-output Profit and loss balance principle, set up well depth and single well-controlled economic limit workable reserve Core analysis, it is determined that the economic limit workable reserve of oil well under certain oil price, certain well depth drilling depth. As, certain unit oil-bearing area 8.2Km2, oil reservoir average effective caliper 18.42m, petroleum-in-place 2296 �� 104T, dark 2142m in oil reservoir, single storage coefficient is 18.1 �� 104T/ mouth .km2, series of strata restructuring adjustment before demarcate recovery ratio 0.395, recovery percent of reserves 0.386. Oil well drilling depth 2011m, economic limit workable reserve during oil price 80 $/bbl is 5673t, as shown in Figure 2.
In step 103, it is contemplated that in different recovery ratio amplification situation, the single well-controlled economic limit geologic reserve under the different well depths corresponding from economic limit workable reserve, different oil price, namely determines the individual well economic limit geologic reserve under certain condition. Under the prerequisite of known individual well economic limit workable reserve, it is assumed that recovery ratio amplification, individual well economic limit geologic reserve when can calculate certain recovery ratio amplification according to (formula 1).
In formula, Nd-individual well economic limit geologic reserve, 104T/ mouth;
Np-individual well economic limit workable reserve, 104T/ mouth;
ER-recovery ratio, decimal;
��ER-recovery ratio increasing degree, decimal;
R-recovery percent of reserves, decimal.
As, when oil price 80 $/bbl, raising recovery ratio amplitude are 0.04, individual well economic limit geologic reserve is 11.58 �� 104T, as shown in Figure 3.
In step 105, it is determined that the actual net thickness of reservoir and effective driving radius and well spacing, according to the relation of single well-controlled remaining geologic reserves and well spacing, net thickness, it is determined that corresponding net thickness. According to individual well economic limit geologic reserve, the different well spacing that can be met under individual well economic limit geologic reserve according to (formula 2) and the combination of net thickness.
Nd=D �� h �� a2(formula 2)
In formula, D-is mono-stores up coefficient, 104t/Km2.m;
H-reservoir net thickness, m;
A-well spacing, m.
Considering that a lot of oil reservoir has dropped into exploitation and carried out series of strata restructuring adjustment for many years afterwards, the index that individual well economic limit geologic reserve is corresponding should be single well-controlled remaining geologic reserves, and its expression formula is:
Nn=D �� (1-R) �� h �� a2(formula 3)
In formula, Nn-single well-controlled remaining geologic reserves, 104t��
Effective driving radius of oil reservoir is obtained, according to (formula 3) according to experimental formula, well test data etc.; Corresponding reservoir net thickness can be obtained.
In one embodiment, obtaining effective driving radius of oil reservoir according to experimental formula, well test data etc., the effective driving radius of middle LOW PERMEABILITY RESERVOIR gets 300m, and the effective driving radius of high permeable cement gets 400m. During the close combination of each rhythmite physical property (under the prerequisite that permeability grade is less), in net thickness hypotonic, Thief zone reservoir be about 7m, obtain this net thickness and well spacing according to (formula 3) and combine single well-controlled remaining geologic reserves 11.8 �� 10 corresponding to (300m �� 7m, 400m �� 7m)4T, as shown in Figure 4. The segmentation restructuring of these unit series of strata the results are shown in Table 1.
Certain unit series of strata of table 1 segmentation restructuring result table
In step 107, step 103 is mated with single well-controlled remaining geologic reserves mutually with the economic limit geologic reserve in step 105, it is determined that under different net thickness and well spacing combine, improve the amplitude of recovery ratio under different oil price. Being contrasted in 103 and the single well-controlled residual recoverable reserves in step 105 and individual well economic limit workable reserve, when judging this net thickness and well spacing, whether single well-controlled residual recoverable reserves is more than or equal to individual well economic limit workable reserve.Only meet the net thickness of this condition and well spacing combination, it is only and possesses technology, economic feasibility, can obtain improving accordingly recovery ratio amplitude simultaneously. In one embodiment, corresponding single well-controlled remaining geologic reserves 11.8 �� 10 is determined by set net thickness and well spacing combination (300m �� 7m, 400m �� 7m)4T, when then obtaining oil price 80 $/bbl, raising recovery ratio amplitude corresponding to 300m �� 7m series of strata is 0.08, namely 8%; Raising recovery ratio amplitude corresponding to 400m �� 7m series of strata is 0.04, namely 4%.
Claims (5)
1. series of strata recombinant technology economic policy boundary determines novel method, it is characterised in that, this series of strata recombinant technology economic policy boundary determines that novel method comprises:
Step 1, it is determined that single well-controlled economic limit workable reserve under different well depth, different oil price;
Step 2, it is contemplated that in different recovery ratio amplification situation, the single well-controlled economic limit geologic reserve under the different well depths corresponding from single well-controlled economic limit workable reserve, different oil price;
Step 3, it is determined that the effective driving radius of reservoir, according to the relation of single well-controlled remaining geologic reserves and well spacing, net thickness, it is determined that corresponding net thickness; And
Step 4, mates with the single well-controlled remaining geologic reserves in step 3 mutually by the single well-controlled economic limit geologic reserve in step 2, it is determined that under different net thickness and well spacing combine, improve the amplitude of recovery ratio under different oil price.
2. series of strata recombinant technology economic policy boundary according to claim 1 determines novel method, it is characterized in that, in step 1, according to input-output Profit and loss balance principle, set up well depth and single well-controlled economic limit workable reserve Core analysis, it is determined that the single well-controlled economic limit workable reserve under different well depth, different oil price.
3. series of strata recombinant technology economic policy boundary according to claim 1 determines novel method, it is characterized in that, in step 2, under the prerequisite of known single well-controlled economic limit workable reserve, assuming that recovery ratio amplification, single well-controlled economic limit geologic reserve when calculating certain recovery ratio amplification according to formula 1:
In formula, Nd-single well-controlled economic limit geologic reserve, 104T/ mouth;
Np-single well-controlled economic limit workable reserve, 104T/ mouth;
ER-recovery ratio, decimal;
��ER-recovery ratio increasing degree, decimal;
R-recovery percent of reserves, decimal.
4. series of strata recombinant technology economic policy boundary according to claim 1 determines novel method, it is characterized in that, in step 3, according to single well-controlled economic limit geologic reserve, the different well spacing being met under single well-controlled economic limit geologic reserve according to formula 2 and the combination of net thickness:
Nd=D �� h �� a2(formula 2)
In formula, D-is mono-stores up coefficient, 104t/Km2.m;
H-reservoir net thickness, m;
A-well spacing, m;
The index that single well-controlled economic limit geologic reserve is corresponding is single well-controlled remaining geologic reserves Nn, its expression formula is:
Nn=D �� (1-R) �� h �� a2(formula 3)
In formula, Nn-single well-controlled remaining geologic reserves, 104T;
Obtain effective driving radius of oil reservoir according to experimental formula, well test data, according to formula 3, corresponding reservoir net thickness can be obtained.
5. series of strata recombinant technology economic policy boundary according to claim 1 determines novel method, it is characterized in that, in step 4, single well-controlled economic limit geologic reserve in step 2 and the single well-controlled remaining geologic reserves in step 3 are contrasted, when judging this net thickness and well spacing, whether single well-controlled residual recoverable reserves is more than or equal to single well-controlled economic limit workable reserve, meets net thickness and the well spacing combination of this condition, can obtain improving accordingly recovery ratio amplitude.
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Cited By (2)
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| CN108180007A (en) * | 2017-12-26 | 2018-06-19 | 中国石油化工股份有限公司 | Old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method |
| CN113762657A (en) * | 2020-06-02 | 2021-12-07 | 中国石油化工股份有限公司 | Method for evaluating potential of exploratory undeveloped reserve utilization of petroleum and electronic equipment |
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| US20090288827A1 (en) * | 2008-05-22 | 2009-11-26 | Husky Oil Operations Limited | In Situ Thermal Process For Recovering Oil From Oil Sands |
| CN104100243A (en) * | 2013-04-08 | 2014-10-15 | 中国石油化工股份有限公司 | Three-stage subdivision method for retarding interlayer interference of fault-block oil reservoir with ultrahigh water-cut stage and multiple oil layers |
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Patent Citations (3)
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| CN101145235A (en) * | 2007-06-29 | 2008-03-19 | 中国石化集团胜利石油管理局 | Oil field development decision-making system |
| US20090288827A1 (en) * | 2008-05-22 | 2009-11-26 | Husky Oil Operations Limited | In Situ Thermal Process For Recovering Oil From Oil Sands |
| CN104100243A (en) * | 2013-04-08 | 2014-10-15 | 中国石油化工股份有限公司 | Three-stage subdivision method for retarding interlayer interference of fault-block oil reservoir with ultrahigh water-cut stage and multiple oil layers |
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| CN108180007A (en) * | 2017-12-26 | 2018-06-19 | 中国石油化工股份有限公司 | Old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method |
| CN108180007B (en) * | 2017-12-26 | 2021-11-16 | 中国石油化工股份有限公司 | New method for measuring and calculating economic ultimate drilling potential and recovery ratio of old oil field |
| CN113762657A (en) * | 2020-06-02 | 2021-12-07 | 中国石油化工股份有限公司 | Method for evaluating potential of exploratory undeveloped reserve utilization of petroleum and electronic equipment |
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