CN113673794B - Method for evaluating comprehensive recycling efficiency of old oilfield gas water electric heating agent - Google Patents
Method for evaluating comprehensive recycling efficiency of old oilfield gas water electric heating agent Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 52
- 238000004064 recycling Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005485 electric heating Methods 0.000 title claims abstract description 23
- 238000011156 evaluation Methods 0.000 claims abstract description 43
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 33
- 238000011161 development Methods 0.000 claims abstract description 26
- 238000005265 energy consumption Methods 0.000 claims abstract description 16
- 238000013210 evaluation model Methods 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 56
- 239000007789 gas Substances 0.000 claims description 42
- 239000003245 coal Substances 0.000 claims description 21
- 239000010865 sewage Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000010802 sludge Substances 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 13
- 239000002918 waste heat Substances 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000013043 chemical agent Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 239000010779 crude oil Substances 0.000 claims description 4
- 238000010606 normalization Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 238000012886 linear function Methods 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 230000001502 supplementing effect Effects 0.000 description 1
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- 239000003832 thermite Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention relates to the technical field of oilfield development, in particular to a method for evaluating comprehensive recycling efficiency of an old oilfield gas-water electric heating agent. The method comprises the following steps: step 1, counting the end link values of each medium resource development of the oil field; step 2, determining a cyclic utilization mode and a cyclic utilization path of each medium resource; step 3, counting the end value of each medium resource which can be practically utilized and recovered, and calculating the energy consumption, cost and cyclic utilization rate of each medium after cyclic utilization; step 4, establishing a gas-water electric heating agent recyclable evaluation model; and 5, establishing an evaluation standard, and judging the comprehensive cyclic utilization level and efficiency of the gas-water electric heating agent. The method comprehensively considers the comprehensive influence of the cyclic utilization of each medium resource on the energy consumption, the cost, the path and the benefit, has comprehensive evaluation and high credibility, and has important significance for the development guidance of the oil field.
Description
Technical Field
The invention relates to the technical field of oilfield development, in particular to a method for evaluating comprehensive recycling efficiency of an old oilfield gas-water electric heating agent.
Background
The external dependence of petroleum in China is nearly 70%, and the safety situation of oil and gas supply is very serious; meanwhile, the oil and gas industry is not only an energy producer, but also a large consumer of energy consumption, and the green sustainable development task is difficult. Taking victory oil fields as an example, 2342 ten thousand tons of oil are produced per year, with the decline of newly-increased reserves, the steady production task is difficult, the oil field development comprehensively enters an ultra-high water-containing stage, the annual water yield is up to 2.75 hundred million tons, and the total energy consumption is 249 ten thousand tons of standard coal, so that the environment-friendly sustainable development faces challenges.
At present, petroleum resource recycling technologies have been developed, including a produced dissolved gas recycling boiler heating, a mud and rock debris centralized recycling treatment process, a produced water and sewage biochemical treatment technology, a sewage recycling technology, a associated gas fully-closed gathering and conveying process, an oily sludge profile control process in the aspect of producing sludge, a produced liquid waste heat utilization technology in the aspect of waste heat and the like. However, recycling of a single resource tends to be of little benefit.
The resource utilization is maximized, comprehensive cyclic utilization of gas resources, water resources, waste heat resources, sludge containing various chemical agents and other resources generated in petroleum production is explored, and the comprehensive cyclic utilization gradually becomes a research hot spot for people. With the deep research, the evaluation of the comprehensive utilization of each resource is an important reference index for determining the comprehensive recycling scheme of each resource. In the prior art, evaluation indexes and standards for comprehensive utilization of oil field resources are not available. If the subjective human judgment is relied on to evaluate which medium is good and bad in recycling effect, quantitative evaluation is lacking, the actual judgment is easy to deviate, and the difference between the result and the actual judgment is large. In addition, the oil field development not only relates to the utilization of various resources, but also relates to various utilization ways of various resources, and the effective evaluation of the comprehensive utilization efficiency of the various ways is certainly difficult for the various resources.
Therefore, the method for evaluating the comprehensive recycling efficiency of each resource of the old oil field is very necessary, and has important guiding significance for sustainable development of the old oil field.
Disclosure of Invention
The invention mainly aims to provide a method for evaluating comprehensive recycling efficiency of an aqueous thermic agent of old oilfield gas, which comprehensively considers the comprehensive influence of recycling of various medium resources on energy consumption, cost, path and benefit, has comprehensive evaluation and high credibility, and has important significance for oilfield development guidance.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a method for evaluating comprehensive recycling efficiency of an old oilfield gas water and electricity thermite, which comprises the following steps:
step 1, counting the end link values of each medium resource development of the oil field;
step 2, determining a cyclic utilization mode and a cyclic utilization path of each medium resource;
step 3, counting the end value of each medium resource which can be practically utilized and recovered, and calculating the energy consumption, cost and cyclic utilization rate of each medium after cyclic utilization;
step 4, establishing a gas-water electric heating agent recyclable evaluation model;
step 5, establishing an evaluation standard, and judging the comprehensive cyclic utilization level and efficiency of the gas-water electric heating agent;
the medium resource comprises gas resource, water resource, electric resource, waste heat resource and oily sludge resource containing chemical agent.
Preferably, in step 1, the media resource development end link value Q i1 The method comprises the steps of carrying out a first treatment on the surface of the Comprising the following steps: annual gas production Q g1 Annual sewage yield Q w1 Annual high-low temperature sewage quantity Q h1 Annual oil-containing sludge quantity Q s1 。
Preferably, in step 2, the gas source is mainly the sleeve dissolved gas generated in the production process, and the path n is recycled g Comprising the following steps: as boiler fuel;
preferably, the water resource is mainly produced water of oil field, and the path n is utilized w Comprising the following steps: directly reinjecting the oil reservoir; as steam injection water for a thick oil boiler;
preferably, the electricity is mainly saved electricity, and the path n is recycled e Comprising the following steps: preparing gas by a gas boiler; pipeline steam delivery; injecting steam into a shaft; lifting a shaft; collecting and conveying;
preferably, the waste heat resource is mainly waste heat of produced liquid, and the path n is recycled h Comprising the following steps: pipeline oil transportation, unloading and transporting and heating crude oil;
preferably, the oily sludge resource with chemical agent is recycled by the path n s Comprising the following steps: the oil deposit profile control agent is used as an oil deposit profile control agent.
Preferably, in step 3, the medium resource actually can utilize the recovered end value Q i2 The method comprises the steps of carrying out a first treatment on the surface of the Comprising the following steps: annual cycle natural gas quantity Q g2 Annual cyclic utilization of sewage quantity Q w2 Annual energy saving Q e2 Sewage quantity Q for annual cyclic utilization of extracted heat h2 Annual cyclic utilization of oil-containing sludge Q s2 。
Preferably, the energy saving value calculation method for each medium is as follows: converting into equivalent standard coal according to the enthalpy:
E i ＝Q i2 ×α i
wherein Q is i2 The end value recovered for the actual utilization of a certain medium resource; alpha i And converting the standard coal coefficient for a certain medium resource equivalent.
Preferably, in step 3, each medium saving cost is calculated from the unit price of each medium.
Preferably, in step 3, each medium recycling rate:
wherein Q is i2 End value, Q, recovered for actual availability of media resources i1 And developing an end link value for the medium resource.
Preferably, in step 4, a gas-water electric heating agent recyclable evaluation model is built, and the method comprises:
(1) Energy consumption saving value E after each medium resource is selected for cyclic utilization i Cost saving C i Cyclic utilization η i Number n of medium recycling paths i 4 indexes are used as recyclable comprehensive evaluation indexes;
(2) Build X n×m The matrix, the matrix row represents each medium to be evaluated system of the gas-water electric heating agent, and the column represents the evaluation index;
preferably X n×m The matrix can be expressed as:
(3) Carrying out dimensionless treatment on the evaluation matrix by adopting a normalization method:
c is the translation amount;
(4) Weighting 4 evaluation indexes to establish a weight vector omega= (omega) 1 ,ω 2 ,ω 3 ,ω 4 )′。
(5) Establishing a comprehensive evaluation model, and taking linear function weighting as a final evaluation model:
preferably, the evaluation criteria established in step 5 are as shown in table 1 below:
TABLE 1
| Evaluation value | Evaluation results |
| 0～0.2 | Low and low |
| 0.2～0.4 | Lower level |
| 0.4～0.6 | Medium and medium |
| 0.6～0.8 | Preferably, it is |
| 0.8～1.0 | Good (good) |
The higher the evaluation value, the better the evaluation effect.
The method comprises the steps of firstly aiming at old oil field development, counting the development end link value of the gas-water heating agent, determining the recycling mode and the recycling path of each medium according to the recycling technology of each medium, and further calculating the energy consumption-saving and cost-saving value and the actual recycling rate of each medium after recycling. On the basis, the evaluation index of the comprehensive recycling of the gas-water electric heating agent is determined, a recyclable evaluation model and evaluation standard of the gas-water electric heating agent are established, and further evaluation of the comprehensive recycling level and efficiency of the gas-water electric heating agent in the oil field development process is carried out. The method is simple and practical, the evaluation is comprehensive, and the problem of high difficulty in comprehensive cycle evaluation of the gas-water electric heating agent multi-medium and multi-path is solved. Through the evaluation of the recycling efficiency of each medium of the gas-water electric heating agent, the method has important significance for the maximized utilization of oil field resources, the improvement of oil field development benefits, the reduction of environmental pollution and the realization of sustainable development of oil fields.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flowchart of an embodiment of a method for evaluating comprehensive recycling efficiency of an aqueous electrolytic agent for old oilfield gas.
Fig. 2 is a schematic diagram of a gas recycling path of a specific embodiment of a method for evaluating comprehensive recycling efficiency of an aqueous thermic agent in old oilfield gas.
FIG. 3 is a schematic diagram of a water recycling path of a specific embodiment of a method for evaluating comprehensive recycling efficiency of an aqueous thermic agent in an old oilfield gas.
Fig. 4 is a schematic diagram of an electric recycling path of a specific embodiment of a method for evaluating comprehensive recycling efficiency of an aqueous thermic agent in old oilfield gas.
Fig. 5 is a schematic diagram of a thermal cycle utilization path of a specific embodiment of a method for evaluating comprehensive recycling efficiency of an aqueous thermic agent in an old oilfield gas.
FIG. 6 is a schematic diagram of an agent recycling path of an embodiment of a method for evaluating comprehensive recycling efficiency of an aqueous thermic agent in an old oilfield gas.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
As shown in fig. 1, the method for evaluating the comprehensive recycling efficiency of the water and electricity thermic agent of the old oilfield gas comprises the following steps:
in step 101, the formation of a certain oil field block is buried with 1150m depth, 2300mD permeability, 32.3% porosity, 56 ℃ oil layer temperature, 3400 mPa.s viscosity of de-aerated crude oil at formation temperature and 18m dissolved gas-oil ratio 3 And/t, original stratum pressure 12.3MPa. The block currently has 40 throughput wells and 160 conventional production wells. The average number of the throughput well cycle turns reaches about 9, and the later period of high-pass throughput development is entered. The annual liquid yield of the block is 188.5 multiplied by 104m at present 3 Annual oil production of 24X 104m 3 Annual gas production 432X 104m 3 Annual sewage yield 164.5×104m 3 Annual oil-containing sludge 0.14X10) 4 t. Single well daily liquid 37.7t/d, single well daily oil 4.8t/d, single well daily gas 86.4m 3 And/d. In early development, because equipment and flow are relatively backward and complicated, the energy consumption is relatively high in an injection and production system, and the comprehensive energy consumption of ton oil reaches 371 Kw.h/t. After the advanced lifting process, the optimized working system and the integrated optimization decision scheme are adopted, the comprehensive energy consumption of ton oil is reduced to 328 Kw.h/t, 43 Kw.h/t is saved, the reduction is 11.5%, and the annual energy saving can reach 1032.0 multiplied by 10 4 Kw.h. The produced sewage is divided into two parts, wherein the high Wen Wu water is mainly produced by treating the produced fluid of the huff-puff thermal production well. The outlet temperature is 70 ℃ and is 30.0X104 m 3 The low-temperature sewage is mainly generated by treating the produced fluid of a conventional production well. The outlet temperature is 50 ℃ and is 134.5 multiplied by 104m 3 . The statistical results of the values of each medium of gas, water, heat and agent at the end link of oil field development are shown in table 2. The flow proceeds to step 102.
TABLE 2
In step 102, determining the recycling mode and path of each medium of the gas-water electric heating agent;
a: and (3) dissolving gas in a sleeve pipe generated in the production process, wherein a part of the dissolved gas is used for selling natural gas commodities, and the rest part of the dissolved gas is used for oil field gas boiler fuel. Thus, the route n is recycled g =1, as shown in fig. 2.
B: after water quality treatment, part of water produced by the production well is continuously reinjected into the oil reservoir, so that the effects of supplementing stratum energy and displacing oil are achieved; and (3) purifying a part of the water to be used as steam injection source water of the thick oil boiler. Therefore, the number of main paths of water recycling is n w =2, as shown in fig. 3.
C: the electricity mainly occurs in the lifting process of the shaft, and the pumping unit consumes the electricity. The method saves a large amount of electric energy through a high-efficiency low-energy-consumption shaft lifting process, indirectly serves all links in the development process, including the links of steam injection, steam transmission, shaft steam injection, shaft lifting and gathering and transmission, and mainly utilizes the number of paths of n e =5, as shown in fig. 4.
D: the temperature of the produced sewage is relatively high due to the reasons of oil layer temperature or steam injection and the like, and the temperature of a part of the produced sewage is relatively high, which can reach about 70 ℃, and the temperature of a part of the produced sewage is relatively low, which is about 50 ℃. The low-temperature water is directly subjected to heat exchange, and the heat pump is adopted to recycle the waste heat. In addition, flue gas from the combustion of gas boilers also contains a large amount of heat. High temperature sewageAfter being recovered, the waste heat of the boiler flue gas can be used for pipeline oil transportation, unloading oil transportation and crude oil heating, and is 3 main paths for heat recycling. The heat cycle utilization path is 3 paths, and n is recorded h =3, as shown in fig. 5.
E: the agent, produced liquid, often carries stratum sand, oil-containing sludge and the like, and from the perspective of resource circulation of oil reservoir development, the oil-containing sludge can be prepared into emulsion suspension liquid which is used as an oil reservoir profile control agent, and after being injected into an oil reservoir, the oil reservoir development effect can be improved. The number of development paths of the profile control agent is 1, and is marked as n s =1. As shown in fig. 6. The flow proceeds to step 103.
In step 103, the end values of the actual available recovery of each medium of gas, water, electricity, heat and agent are counted respectively: annual cyclic utilization of natural gas Q g2 Annual cyclic utilization of sewage Q w2 Annual energy saving Q e2 High-temperature and low-temperature sewage quantity Q by annual waste heat utilization h2 Annual preparation of profile control dose Q s2 As shown in table 2.
TABLE 2
According to equivalent conversion coefficients of standard coal, calculating equivalent standard coal values after gas, water, electricity, heat and agent media are practically recycled:
air: e (E) g ＝Q g2 ×α g ＝146.5×10 4 m 3 X1.33 kg of standard coal/m 3 0.1948 ten thousand tons of standard coal;
water: e (E) w ＝Q w2 ×α w ＝164.5×10 4 m 3 X 0.0435= 0.06457 ten thousand tons of standard coal;
electric: e (E) e ＝Q e2 ×α e ＝1032×10 4 X 0.1229 = 0.01268 ten thousand tons of standard coal;
heat: conversion equivalent standard coal for high-temperature sewage waste heat utilization: e (E) hh ＝cmΔT h ·α h ＝4.2KJ/(kg·℃)×24.0×10 4 m 3 ×(70-55)℃×10 -6 X 36.1647kg standard coal/gj= 0.05166 ten thousand tons standard coal;
conversion of low-temperature sewage waste heat utilization into equivalent standard coal: e (E) hl ＝cmΔT l ·α h ＝4.2KJ/(kg·℃)×107.6×10 4 m 3 ×(50-45)℃×10 -6 X 36.1647kg standard coal/gj= 0.07720 ten thousand tons standard coal;
E h ＝E hh +E hl =0.05166+0.07720= 0.12886 ten thousand tons of standard coal.
The preparation method comprises the following steps: e (E) s ＝Q s2 ×α s ＝0.098×10 4 t× 0.3851kg standard coal/kg= 0.03774 ten thousand tons standard coal.
According to the price of the gas-water electrolytic agent, the cost saved after recycling is calculated:
air: according to the price of the natural gas of 3.1 yuan/m 3 Calculate, air save cost C s =454.1 ten thousand yuan;
water: according to the price of 5.0 yuan/m of industrial water 3 Calculate, water saving cost C w = 822.5 ten thousand yuan;
electric: according to the calculation of industrial electricity price of 0.8 yuan/Kw.h, the electricity cost C is saved e =825.6 ten thousand yuan;
heat: thermal savings cost C, calculated as 73.0 yuan/GJ h = 275.3 ten thousand yuan;
the preparation method comprises the following steps: according to 5000 yuan/t calculation of the profile control agent, the profile control agent saves the cost C s =490.0 ten thousand yuan.
According to the formulaCalculating the recovery utilization rate of the gas-water heat agent to be eta respectively g ＝33.91％、η w ＝100％、η h ＝80％、η s =70%. Electric recycling rate eta e The value is 100%. The flow proceeds to step 104.
In step 104, a gas-water electric-heating agent recyclable evaluation model is established.
(1) The method uses the number of the medium recycling paths, 4 indexes as recyclable comprehensive evaluation indexes, wherein the annual standard coal (energy consumption), annual cost and cyclic utilization rate are reduced after the recycling of the gas-water electrolytic agent.
(2) Build X n×m The matrix (n=5, m=4) represents 5 systems to be evaluated for gas, water, electricity, heat, and agent. Wherein, the row represents each medium system to be evaluated of the gas-water electric heating agent, and the column represents the evaluation index. Expressed as a matrix:
(3) In order to evaluate indexes of different units conveniently and reduce the influence of weights brought by different dimension, a normalization method is adopted for carrying out dimensionless treatment on an evaluation matrix.
Wherein c is the translation amount, and the value is 0.2. After normalization by the method, each matrix value becomes a dimensionless value x i ′ j And each value ranges between 0-1. The normalized evaluation matrix is:
(4) Weighting 4 evaluation indexes, and determining the weight vector of the indexes to be omega= (0.35,0.30,0.25,0.1)', according to field experience.
(5) And establishing a comprehensive evaluation model. Thus linear function weighting is used as the final evaluation model.
(6) And (3) solving an evaluation model y= (0.6504,0.7748,0.8385,0.6615,0.5994)', and obtaining evaluation results of five evaluation targets of air, water, electricity, heat and agent, wherein the overall average value is 0.7049.
The flow proceeds to step 105.
In step 105, comprehensive recycling evaluation criteria are established as shown in table 1. The higher the evaluation value, the better the evaluation result.
According to the recycling evaluation results of the secondary gas, water, electricity, heat and agent, the electricity (0.8385) has very good utilization effect and excellent comprehensive performance, and has advantages in saving energy consumption, cost, recycling rate and recycling path; the comprehensive utilization of water (0.7748), gas (0.6504) and heat (0.6615) is relatively good; while the overall utilization of the agent (0.5994) was somewhat worse than the other 4 mediums, but was near better depending on being at a medium utilization level. The comprehensive average value of the evaluation results is 0.7049, and the evaluation results are good, so that the oil field block is indicated to be at the upstream level in the comprehensive recycling level and efficiency of gas, water, electricity, heat and agents.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (1)
1. The method for evaluating the comprehensive recycling efficiency of the old oilfield gas-water electric heating agent is characterized by comprising the following steps of:
step 1, counting the end link values of each medium resource development of the oil field;
step 2, determining a cyclic utilization mode and a cyclic utilization path of each medium resource;
step 3, counting the end value of each medium resource which can be practically utilized and recovered, and calculating the energy consumption, cost and cyclic utilization rate of each medium after cyclic utilization;
step 4, establishing a gas-water electric heating agent recyclable evaluation model;
step 5, establishing an evaluation standard, and judging the comprehensive cyclic utilization level and efficiency of the gas-water electric heating agent;
the medium resource comprises a gas resource, a water resource, an electric resource, a waste heat resource and an oil-containing sludge resource containing chemical agents;
in step 1, the media resource development end link value Q i1 The method comprises the steps of carrying out a first treatment on the surface of the Comprising the following steps: annual gas production Q g1 Annual sewage yield Q w1 Annual high-low temperature sewage quantity Q h1 Annual oil-containing sludge quantity Q s1 ；
In the step 2, the gas resource is mainly the sleeve dissolved gas generated in the production process, and the path n is recycled g Comprising the following steps: as boiler fuel;
the water resource is mainly produced water of oil field, and the path n is utilized w Comprising the following steps: directly reinjecting the oil reservoir; as steam injection water for a thick oil boiler;
the electricity is mainly saved electricity, and the path n is recycled e Comprising the following steps: preparing gas by a gas boiler; pipeline steam delivery; injecting steam into a shaft; lifting a shaft; collecting and conveying;
the waste heat resource is mainly the waste heat of the produced liquid, and the path n is recycled h Comprising the following steps: pipeline oil transportation, unloading and transporting and heating crude oil;
oil-containing sludge resource with chemical agent, cyclic utilization path n s Comprising the following steps: as a profile control agent for oil reservoirs;
in step 3, the medium resource actually can utilize the recovered end value Q i2 The method comprises the steps of carrying out a first treatment on the surface of the Comprising the following steps: annual cycle natural gas quantity Q g2 Annual cyclic utilization of sewage quantity Q w2 Annual energy saving Q e2 Sewage quantity Q for annual cyclic utilization of extracted heat h2 Annual cyclic utilization of oil-containing sludge Q s2 ；
The energy consumption value saving calculation method of each medium comprises the following steps: converting into equivalent standard coal according to the enthalpy:
E i ＝Q i2 ×α i
wherein Q is i2 The end value recovered for the actual utilization of a certain medium resource; alpha i Converting standard coal coefficients for a certain medium resource equivalent;
calculating the cost saving of each medium according to the unit price of each medium;
the cyclic utilization rate of each medium is as follows:
wherein Q is i2 End value, Q, recovered for actual availability of media resources i1 Developing a terminal link value for the medium resource;
in step 4, a gas-water electric heating agent recyclable evaluation model is established, and the method comprises the following steps:
(1) Energy consumption saving value E after each medium resource is selected for cyclic utilization i Cost saving C i Cyclic utilization η i Number n of medium recycling paths i 4 indexes are used as recyclable comprehensive evaluation indexes;
(2) Build X n×m The matrix, the matrix row represents each medium to be evaluated system of the gas-water electric heating agent, and the column represents the evaluation index;
X n×m the matrix can be expressed as:
(3) Carrying out dimensionless treatment on the evaluation matrix by adopting a normalization method:
M j ＝max 1≤i≤n {x ij }(i＝1，...，m)
c is the translation amount;
(4) Weighting 4 evaluation indexes to establish a weight vector omega= (omega) 1 ，ω 2 ，ω 3 ，ω 4 )′；
(5) Establishing a comprehensive evaluation model, and taking linear function weighting as a final evaluation model:
the evaluation criteria established in step 5 are:
the higher the evaluation value, the better the evaluation effect.
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