CN104712328A - Method for rapidly evaluating producing condition of single flow unit in complex oil deposit - Google Patents
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Abstract
The invention discloses a method for rapidly evaluating the producing condition of a single flow unit in a complex oil deposit. The method comprises the four steps of single flow unit remaining reserve calculation, single flow unit development state parameter analysis, single flow unit evaluation index obtaining and single flow unit adjustment target queuing and target optimization, and finally the producing condition of the single flow unit in the complex oil deposit is rapidly evaluated. On the basis of a tectonic framework and oil layer distribution obtained through geological research, the original geological reserve of single flow unit is calculated; on the basis of reservoir geological characteristics and development history, the extraction amount and the injection amount of the single flow unit are rapidly obtained, and the producing degree, the remaining oil potential and the current development situation are determined based on the original reserve; on the basis of the reservoir potential and the current development situation, correlated indexes are selected to quantitatively evaluate the adjusting effect of the single flow unit, queuing is carried out based on the evaluation result, an adjustment unit sequence is determined, the optimum adjustment target is preferentially selected, and the oil reservoir exploitation and adjustment effect is improved.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration and development, in particular to a method for rapidly evaluating the utilization condition of a single flow unit in a complex oil reservoir.
Background
Compared with a simple oil reservoir, the complex oil-gas reservoir has strong internal separability, and internal fluids of different separators do not flow mutually, so that an independent flowing system (flowing unit) can be formed in the development process, and the development process is further complicated. Since there are a large number of separate separators with different potential and different development results, the potential of different units needs to be clarified during development, and the most advantageous units are preferably adjusted to achieve the best development results. At present, no good research scheme for the problem exists. The conventional method is to establish a reservoir geological model, find out the residual oil of different units through reservoir numerical simulation, and perform corresponding optimization according to the residual oil. However, the research based on the idea is high in cost, and the accuracy of the complex oil reservoir is difficult to guarantee.
Based on this background, in order to facilitate the development of complex oil reservoirs, a method capable of evaluating a single flow unit in a complex oil reservoir quickly and economically is urgently needed, and a method which is most beneficial to having an adjustment object is preferably selected, so that the adjustment is carried out with the most beneficial target preferably, and the maximization of the oil reservoir development benefit is ensured.
Disclosure of Invention
The invention aims to provide a method for rapidly evaluating the utilization condition of a single flow unit in a complex oil reservoir.
In order to solve the technical problems, the invention provides a method for rapidly evaluating the utilization condition of a single flow unit in a complex oil reservoir, which comprises the following steps:
1) single flow cell remaining reserve calculation
(1) Raw reserve of a single flow cell
The raw reserve calculation is based on a volumetric method, and the formula is:
OOIP＝AHeΦS0/Bi
wherein,
OOIP is the original oil and gas reserves of a single flow unit;
a is the oil-containing area of a single flow cell;
Herolled effective thickness for a single flow cell;
Φ is the porosity of a single flow cell;
S0oil saturation for a single flow unit;
Bithe total volume coefficient of crude oil of a single flow unit;
(2) single flow unit capacity
The production is accumulated by the monthly production of each layer of each well in the flow unit, and the calculation formula is as follows:
OUTPUT is the accumulated OUTPUT of a single flow unit;
Pijthe yield of the ith well in the jth month;
n is the total number of wells once produced on a single flow cell;
mithe total number of production months of the ith well in a single flow unit is divided into a plurality of zones;
the monthly output of the single flow unit is obtained by the monthly total output of the production well and the characteristics of each production interval of the well, and the calculation formula is as follows:
Pk＝Pt*Fk
wherein,
Pk: monthly production of the kth flow cell in the production well;
Pt: the total yield of the producing well in the same month;
Fk: the production coefficient of the kth flow unit of the production well;
(3) single flow cell remaining reserve calculation
(4) Single flow cell fill and water production calculations
The injection quantity calculation formula is as follows:
Wk＝Wt*Fk
wherein,
Wk: monthly injection production of the kth flow cell in the production well;
Wt: the total injection amount of the production well in the month;
Fk: the production coefficient of the kth flow unit of the production well;
the water yield calculation formula is as follows:
the injection quantity calculation formula is as follows:
Wok＝Wot*Fk
wherein,
Wok: monthly water production for the kth flow cell in the production well;
Wot: the total water yield of the production well in the same month;
Fk: the production coefficient of the kth flow unit of the production well;
2) single flow cell development state parameter analysis
The method comprises the steps of analyzing the average water content, the utilization degree, the single-well control reserve, the reserve abundance, the energy supply and the deficit condition of a single flowing unit;
3) evaluation index calculation for single flow unit
Selecting index parameters influencing development, giving a grading principle of different indexes during evaluation, and giving the evaluation weight of each index parameter so as to obtain the score of a single index parameter;
4) single flow unit adjusted target queuing and target optimization
And accumulating the scores of all indexes according to the single index score conditions of different flow units in the oil reservoir to obtain the total score of the single flow unit, queuing the flow units according to the total score, and taking the flow unit with the front rank as a preferred adjustment object as an alternative adjustment target to perform the next adjustment and deployment according to the queuing result.
Further, in the (2) th and (4) th substeps of the step 1), the yield coefficient is determined based on the following conditions:
A. if the output profile exists, determining the output coefficient based on the output profile; the quantity of produced oil, gas and water of each flow unit is arranged on a production profile, and the parameter coefficient of each flow unit is determined according to the quantity of the oil, gas and water;
B. if operation measures exist, comparing the output quantity after operation with the original output quantity, and determining the output coefficient after operation, wherein the operation comprises the change of the output caused by the measures of plugging, re-perforating, hole repairing, acidizing and the like; after operation, the yield of the flow unit changes, and a new yield coefficient is determined according to the increment proportion of the liquid production amount relative to the original liquid production amount;
C. if no corresponding monitoring data exists, determining the yield coefficient F according to the permeability and the effective thickness of the reservoirk，Fk＝Xiand/X. Wherein XiIs the splitting condition of each flow cell, Xi＝KiHi，KiPermeability per flow cell, HiFor each flow cell effective thickness; x is the splitting condition of the whole reservoir;
D. if the water injection data exists, the production condition is properly corrected according to the water absorption profile; the relative water absorption percentage of each flow unit is arranged on the water absorption section, and according to the injection-production balance principle, the relative water absorption percentage is the output coefficient of each flow unit;
E. the yield coefficient of each month between two marked time yields is obtained by the linear difference of the yield coefficients of the two nodes before and after the time yield is determined, i.e.
F＝(F2-F1)(t-t1)/(t2-t1)+F1
Wherein,
f is a yield coefficient at the predicted time node t;
F1the output coefficient of the previous mark time node;
F2the output coefficient of the latter marker time node;
t1accumulating the number of months for the production of the previous marked time node;
t is the cumulative month of the predicted time node;
t2accumulating the number of months for the production of the next marked time node;
still further, in the small step (3) of step 1), the calculation formula of the residual reserve of the single flow unit is as follows:
RR＝OOIP-OUTPUT
wherein RR is the remaining reserve of a single flow cell;
still further, in the step 2), the average water content, the utilization degree, the single-well control reserve, the reserve abundance, the energy supply and the deficit condition analysis of the single flow unit are calculated according to the following formulas:
(1) average water cut of single flow cell
The average water content of the single flow unit is obtained by the output conditions of all the production wells on the single flow unit, and the calculation formula is as follows:
wherein,
oi is the oil production of the ith well in the nearest month;
wi is the water production of the ith well in the nearest month; (ii) a
n is the number of production wells on the flow cell.
(2) Degree of movement
The total output of a single flow unit is divided by the original reserve to represent the overall development state of the reservoir;
(3) single well controlled reserves
The ratio of the total reserves to the number of production wells in a single flow unit indicates the well control degree of the reserves;
(4) abundance of reserves
The ratio of the reserve to the oil-containing area of a single flow unit indicates the enrichment degree of the reserve;
(5) energy supply and deficit condition analysis
The main analysis is whether external power and fluid supplement exist, if the external natural energy and fluid supplement do not exist, the vacancy degree, namely the difference value between the produced quantity and the injected quantity, of the flow unit is analyzed, and the energy condition of the whole flow unit is indicated.
Further, in the step 3), the development-influenced index parameters comprise original reserves, residual reserves, reserve abundance, oil-bearing area, deficit condition and single-well control reserves;
giving evaluation weight to the influence of each index parameter on the single flow unit; setting the weight as six fractions, and respectively giving evaluation weights 1, 5/6, 4/6, 2/6, 1/6 and 2/6 to the original reserves, the residual reserves, the reserve abundance, the oil-containing area, the depletion condition and the single-well control reserves according to the magnitude of the influence; and then, carrying out score calculation on each single flow unit, calculating the weight score of each index, and then adding the weight scores to obtain the evaluation index of the flow unit.
The invention has the beneficial effects that:
the method is based on a structural framework and oil layer distribution obtained by geological research, and the original geological reserves of a single flow unit are calculated; according to the geological characteristics and the development history of an oil reservoir, the production and injection quantity of a single flow unit is rapidly obtained, and the utilization degree, the potential of residual oil and the development situation are determined by combining the original reserve; and selecting related indexes to quantitatively evaluate the adjustment effect of the single flow unit according to the potential and the development situation of the oil reservoir, queuing according to the evaluation result, determining the sequence of the adjustment unit, preferably selecting the most favorable adjustment target, and improving the oil reservoir development adjustment effect.
Drawings
FIG. 1 is a diagram of a reservoir configuration.
Detailed Description
In order to better explain the invention, the following further illustrate the main content of the invention in connection with specific examples, but the content of the invention is not limited to the following examples.
The Qinghai oilfield jump-in No. 2 oil reservoir is located in the middle of Qinghai province and is a complex broken block multi-oil layer oil reservoir. The target horizon of the oil reservoir is a recent oil sand mountain group and a dry firewood ditch group, the oil-containing layer reaches more than 500 meters, and the oil-containing sand body reaches more than 200 layers. The region develops in a fault and is complex in structure. The reservoir is a complex fault block reservoir which develops on a anticline background, nearly 20 faults develop, and the anticline is cut into more than 20 fault blocks, so that more than 3000 flow units are arranged in the reservoir. The difficulty of the geological model thereof can be imagined. Meanwhile, because the well section is long, the relation among different units is complex, and the difference of the well control degree of a single unit is large, the related conditions of numerical reservoir simulation are difficult to analyze and set, and the simulation results are not ideal for a plurality of times. Based on the above, based on the analysis of the production of a single flow cell, more than 600 flow cells of the IV and V series in the reservoir were studied, and a good effect was obtained.
1. Single flow cell remaining reserve calculation
The lattice analysis of the oil reservoir is completed on the basis of earthquake and well logging comparison, the three-dimensional earthquake of the region can give the general structural form and fault outline of the oil reservoir, but the specific development of the fault is difficult to describe, so that the development of a breakpoint is determined by applying a stratum contrast technology combining the earthquake and the well logging in the research, the development of the fault is reconstructed, a structural lattice of the region is established, and an oil reservoir structural diagram is compiled (figure 1). In the structural framework, the plane distribution of the compared sand layers is carved, and an oil-water interface is determined by combining the oil-containing property of well points, so that the oil-containing boundary and the height of an oil column of the sand body are determined. Aiming at the problem, a new method and a new technology are needed to finely predict the spreading of the interlayer, and the method adopts the following thought to accurately characterize the interlayer.
Based on the reservoir height, oil bearing area and interpreted porosity, saturation in the flow cell, the original reserves of each cell were calculated as total oil and gas, not recoverable reserves (table). In addition, according to the reserves and the oil-containing area, the reserve abundance can be obtained.
The raw reserve calculation is based on a volumetric method, with the formula
OOIP＝AHeΦS0/Bi
Wherein
OOIP as original hydrocarbon reserve for a single flow unit
A is the oil-containing area of a single flow cell
HeRolled effective thickness as a single flow cell
Phi is the porosity of a single flow cell
S0Oil saturation for single flow cell
BiTotal volume factor of crude oil for single flow unit
Reserve abundance: the enrichment of the reserves is indicated as the ratio of the reserves to the oil-containing area of the single flow cell.
Combine the above equations to obtain Table 1
TABLE 1 IV, V series of layers raw reserves and abundance of reserves for each flow cell
Based on the perforation data of the oil reservoir, the explained oil layer thickness, the permeability, the monitored liquid production profile and the water absorption profile and the operation condition, split time nodes are determined, the output coefficients of all the co-production wells and the production injection wells are calculated, and the output coefficient sequence in the production process is dynamically obtained according to the values of the output nodes (table 2).
Calculating the yield coefficient according to the method of the step (2) of the step 1) to obtain a table 2
TABLE 2 yield coefficient sequence
| Flow cell | Small layer number | Coefficient of output |
| N21Ⅳ-1-1 | N21Ⅳ-1 | 0.11694 |
| N21Ⅳ-2-1 | N21Ⅳ-2 | 0.32184 |
| N21Ⅳ-3-17 | N21Ⅳ-3 | 0.34816 |
| N21Ⅴ-2-15 | N21Ⅴ-2 | 0.18993 |
| N21Ⅴ-8-7 | N21Ⅴ-8 | 0.27857 |
| N21Ⅴ-8-14 | N21Ⅴ-8 | 0.53794 |
| N1Ⅰ-1-3 | N1Ⅰ-1 | 0.15699 |
| N1Ⅰ-2-5 | N1Ⅰ-2 | 0.31196 |
| N1Ⅰ-12-13 | N1Ⅰ-12 | 0.28516 |
| N1Ⅰ-13-1 | N1Ⅰ-13 | 0.70979 |
| N1Ⅰ-16-12 | N1Ⅰ-16 | 0.29168 |
According to the output coefficients of different months, the oil yield, the water yield and the injection amount of the current month are split into each flow unit, and the split values are accumulated to obtain the oil yield, the water yield and the injection amount of different flow units (table 3).
Calculating the injection amount and the output amount of the single flow unit according to the methods of the (3) th and (four) th substeps in the step 1), and obtaining Table 3
TABLE 3 oil, Water and injection quantities for different flow units
| Flow cell | Oil production (10)4t) | Water yield (10)4m3) | Injection amount (10)4m3) |
| N21Ⅳ-1-1 | 0.226 | 0.28651 | 0.1666 |
| N21Ⅳ-2-1 | 2.29997 | 3.0589 | 4.38651 |
| N21Ⅳ-3-17 | 0.01416 | 0.02451 | 0.66854 |
| N21Ⅴ-2-15 | 0.01679 | 0.01047 | 0 |
| N21Ⅴ-8-7 | 0.72355 | 0.24352 | 0.69602 |
| N21Ⅴ-8-14 | 0.01518 | 0.00924 | 0 |
| N1Ⅰ-1-3 | 0.08564 | 0.06681 | 0 |
| N1Ⅰ-2-5 | 1.38988 | 0.46265 | 0.97851 |
| N1Ⅰ-12-13 | 0.58481 | 0.95883 | 0.11339 |
| N1Ⅰ-13-1 | 0.04907 | 0.08028 | 0 |
| N1Ⅰ-16-12 | 0.01678 | 0.02745 | 0.04712 |
2. Single flow cell development state parameter analysis
The method comprises the steps of average water content, utilization degree, single-well control reserve, reserve abundance, energy supply and deficit condition analysis of a single flow unit.
(1) Average water cut of single flow cell
The average water content of the single flow unit is obtained by the output conditions of all the production wells on the single flow unit, and the calculation formula is as follows:
wherein,
Oioil production in the nearest month of the ith well；
WiThe water production of the nearest month of the ith well; (ii) a
n is the number of production wells on the flow cell;
(2) degree of movement
The total output of a single flow unit is divided by the original reserve to represent the overall development state of the reservoir;
(3) single well controlled reserves
The ratio of the total reserves to the number of production wells in a single flow unit indicates the well control degree of the reserves;
(4) abundance of reserves
The ratio of the reserve to the oil-containing area of a single flow unit indicates the enrichment degree of the reserve;
(5) energy supply and deficit condition analysis
And determining the residual reserves of the flow units according to the reserve, output, injection amount and other information of the flow units, and determining the residual potential of the oil reservoir. In order to better evaluate the utilization condition of the flow unit, the utilization degree of the oil reservoir can be obtained by combining the original reserves, and the reservoir vacancy can be determined by combining the injection quantity and the extraction quantity so as to determine the parameters such as the pressure maintenance condition, the surplus reserve abundance of the oil reservoir and the like (table 4).
Obtaining the following table according to the calculation method of the steps (3), (4) and (5)
TABLE 4 reservoir depletion, remaining reserve abundance and Single well control reserve
3. Evaluation index calculation for single flow unit
The method comprises the following steps of determining evaluation parameters, scoring single evaluation indexes, determining evaluation weight coefficients of different indexes and solving comprehensive evaluation scores. And selecting and evaluating a plurality of indexes with large influence on development, including original reserves, residual reserves, reserve abundance, oil-bearing area, vacancy condition and single-well controlled reserves. Giving evaluation weight to the influence of each index parameter on the single flow unit; setting the weight as six fractions, and respectively giving evaluation weights 1, 5/6, 4/6, 2/6, 1/6 and 2/6 to the original reserves, the residual reserves, the reserve abundance, the oil-containing area, the depletion condition and the single-well control reserves according to the magnitude of the influence; then, the score of each single flow unit is calculated, the weight score of each index is calculated, and the weight scores are added to obtain the evaluation index of the flow unit, so that the score of the unit-index is obtained (table 5).
TABLE 5 Scoring and weighting of different indices
4. Single flow unit adjusted target queuing and target optimization
And accumulating the scores of all indexes according to the single index score conditions of different flow units in the oil reservoir to obtain the total score of the single flow unit, queuing the flow units according to the total score, and taking the flow unit with the front rank as a preferred adjustment object as an alternative adjustment target to perform the next adjustment deployment according to the queuing result (table 6).
TABLE 6 Total score for different flow units
| Flow cell | Overall score |
| N21Ⅳ-1-1 | 15 |
| N21Ⅳ-2-1 | 18 |
| N21Ⅳ-3-17 | 13.7 |
| N21Ⅴ-2-15 | 8.83 |
| N21Ⅴ-8-7 | 11.3 |
| N21Ⅴ-8-14 | 9.5 |
| N1Ⅰ-1-3 | 9 |
| N1Ⅰ-2-5 | 15 |
| N1Ⅰ-12-13 | 9.5 |
| N1Ⅰ-13-1 | 8.83 |
| N1Ⅰ-16-12 | 9.5 |
According to the calculation results, the relevant parameters of each flow unit in the oil reservoir are processed to obtain the evaluation parameters of each flow unit in the oil reservoir, and finally, the residual potential of the oil reservoir is queued according to the relevant parameters, so that a main adjustment target unit is determined (table 7).
TABLE 7 remaining potential queuing of reservoirs
| Flow cell | Overall score |
| N21Ⅳ-2-1 | 18 |
| N21Ⅳ-1-1 | 15 |
| N1Ⅰ-2-5 | 15 |
| N21Ⅳ-3-17 | 13.7 |
| N21Ⅴ-8-7 | 11.3 |
| N21Ⅴ-8-14 | 9.5 |
| N1Ⅰ-12-13 | 9.5 |
| N1Ⅰ-16-12 | 9.5 |
| N1Ⅰ-1-3 | 9 |
| N1Ⅰ-13-1 | 8.83 |
| N21Ⅴ-2-15 | 8.83 |
Other parts not described in detail are prior art. Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (5)
1. A method for rapidly evaluating the utilization condition of a single flow unit in a complex oil reservoir is characterized by comprising the following steps: the method comprises the following steps:
1) single flow cell remaining reserve calculation
(1) Raw reserve of a single flow cell
Calculating the original reserves according to a volumetric method;
(2) single flow unit capacity
The production is accumulated by the monthly production of each layer of each well in the flow unit, and the calculation formula is as follows:
OUTPUT is the accumulated OUTPUT of a single flow unit;
Pijthe yield of the ith well in the jth month;
n is the total number of wells once produced on a single flow cell;
mithe total number of production months of the ith well in a single flow unit is divided into a plurality of zones;
the monthly output of the single flow unit is obtained by the monthly total output of the production well and the characteristics of each production interval of the well, and the calculation formula is as follows:
Pk＝Pt*Fk
wherein,
Pk: monthly production of the kth flow cell in the production well;
Pt: the total yield of the producing well in the same month;
Fk: the production coefficient of the kth flow unit of the production well;
(3) single flow cell remaining reserve calculation
(4) Single flow cell fill and water production calculations
The injection quantity calculation formula is as follows:
Wk＝Wt*Fk
wherein,
Wk: monthly injection production of the kth flow cell in the production well;
Wt: the total injection amount of the production well in the month;
Fk: production well kth flow sheetYield coefficient of the element;
the water yield calculation formula is as follows:
the injection quantity calculation formula is as follows:
Wok＝Wot*Fk
wherein,
Wok: monthly water production for the kth flow cell in the production well;
Wot: the total water yield of the production well in the same month;
Fk: the production coefficient of the kth flow unit of the production well;
2) single flow cell development state parameter analysis
The method comprises the steps of analyzing the average water content, the utilization degree, the single-well control reserve, the reserve abundance, the energy supply and the deficit condition of a single flowing unit;
3) evaluation index calculation for single flow unit
Selecting index parameters influencing development, giving a grading principle of different indexes during evaluation, and giving the evaluation weight of each index parameter so as to obtain the score of a single index parameter;
4) single flow unit adjusted target queuing and target optimization
And accumulating the scores of all indexes according to the single index score conditions of different flow units in the oil reservoir to obtain the total score of the single flow unit, queuing the flow units according to the total score, and taking the flow unit with the front rank as a preferred adjustment object as an alternative adjustment target to perform the next adjustment and deployment according to the queuing result.
2. The method for rapidly evaluating the exploitation condition of a single flow cell in a complex reservoir according to claim 1, wherein: in the (2) th and (4) th substeps of the step 1), the yield coefficient is determined based on the following conditions:
A. if the output profile exists, determining the output coefficient based on the output profile; the quantity of produced oil, gas and water of each flow unit is arranged on a production profile, and the parameter coefficient of each flow unit is determined according to the quantity of the oil, gas and water;
B. if operation measures exist, comparing the output quantity after operation with the original output quantity, and determining the output coefficient after operation, wherein the operation comprises the change of the output caused by the measures of plugging, re-perforating, hole repairing, acidizing and the like; after operation, the yield of the flow unit changes, and a new yield coefficient is determined according to the increment proportion of the liquid production amount relative to the original liquid production amount;
C. if no corresponding monitoring data exists, determining the yield coefficient F according to the permeability and the effective thickness of the reservoirk，Fk＝XiX; wherein XiIs the splitting condition of each flow cell, Xi＝KiHi，KiPermeability per flow cell, HiFor each flow cell effective thickness; x is the splitting condition of the whole reservoir;
D. if the water injection data exists, the production condition is properly corrected according to the water absorption profile; the relative water absorption percentage of each flow unit is arranged on the water absorption section, and according to the injection-production balance principle, the relative water absorption percentage is the output coefficient of each flow unit;
E. the yield coefficient of each month between two marked time yields is obtained by the linear difference of the yield coefficients of the two nodes before and after the time yield is determined, i.e.
F＝(F2-F1)(t-t1)/(t2-t1)+F1
Wherein,
f is a yield coefficient at the predicted time node t;
F1the output coefficient of the previous mark time node;
F2the output coefficient of the latter marker time node;
t1accumulating the number of months for the production of the previous marked time node;
t is the cumulative month of the predicted time node;
t2the cumulative number of months for the production of the next marker time node.
3. The method for rapidly evaluating the exploitation condition of a single flow unit in a complex reservoir according to claim 1 or 2, wherein: in the step (3) of the step 1), the calculation formula of the residual reserve of the single flow unit is as follows:
RR＝OOIP-OUTPUT
where RR is the remaining reserve of a single flow cell.
4. The method for rapidly evaluating the exploitation condition of a single flow unit in a complex reservoir according to claim 1 or 2, wherein: in the step 2), the calculation formulas of the average water content, the utilization degree, the single-well control reserve, the reserve abundance, the energy supply and the deficit condition analysis of the single flow unit are as follows:
(1) average water cut of single flow cell
The average water content of the single flow unit is obtained by the output conditions of all the production wells on the single flow unit, and the calculation formula is as follows:
wherein,
Oioil production in the nearest month of the ith well;
Withe water production of the nearest month of the ith well; (ii) a
n is the number of production wells on the flow cell;
(2) degree of movement
The total output of a single flow unit is divided by the original reserve to represent the overall development state of the reservoir;
(3) single well controlled reserves
The ratio of the total reserves to the number of production wells in a single flow unit indicates the well control degree of the reserves;
(4) abundance of reserves
The ratio of the reserve to the oil-containing area of a single flow unit indicates the enrichment degree of the reserve;
(5) energy supply and deficit condition analysis
The main analysis is whether external power and fluid supplement exist, if the external natural energy and fluid supplement do not exist, the vacancy degree, namely the difference value between the produced quantity and the injected quantity, of the flow unit is analyzed, and the energy condition of the whole flow unit is indicated.
5. The method for rapidly evaluating the exploitation condition of a single flow unit in a complex reservoir according to claim 1 or 2, wherein: in the step 3), developing influenced index parameters comprising original reserves, residual reserves, reserve abundance, oil-bearing area, vacancy condition and single-well controlled reserves;
giving evaluation weight to the influence of each index parameter on the single flow unit; setting the weight as six fractions, and respectively giving evaluation weights 1, 5/6, 4/6, 2/6, 1/6 and 2/6 to the original reserves, the residual reserves, the reserve abundance, the oil-containing area, the depletion condition and the single-well control reserves according to the magnitude of the influence; and then, carrying out score calculation on each single flow unit, calculating the weight score of each index, and then adding the weight scores to obtain the evaluation index of the flow unit.
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