CN103114833B - Microbe oil extraction method for activating oil deposit deep portion function flora - Google Patents
Microbe oil extraction method for activating oil deposit deep portion function flora Download PDFInfo
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Abstract
The invention relates to a microbe oil extraction method for activating an oil deposit deep portion function flora. The microbe oil extraction method for activating the oil deposit deep portion function flora comprises the following steps: firstly starting selection of a test site block, then starting selection and optimization on profile control agent specific to the oil deposit geological condition of the test site block, the injection size of the profile control agent is V=pi*r<2>*h*phi*beta, and selecting an activator at the basis of starting structural analysis on nutrition and a flora structure of formation water of the test site block; secondly starting profile control on spot before a microbe displacement of reservoir oil field test; injecting the activator periodically, the injection rate of each round activator is 45-50m<3>; injecting biological inhibitor twice, the injection rate of the biological inhibitor of the first time is m1=f1*k1*phi*r1<2>*h*phi, and the injection rate of the biological inhibitor of the second time is m2=f2*k2*phi*(r2<2>-r1<2>)*h*phi. The microbe oil extraction method for activating the oil deposit deep portion function flora can effectively enhance a microbe displacement of reservoir oil deposit recovery ratio and can be widely used in the microbe oil extraction technical field, and the range of the enhanced recovery ratio can reach to 10-15%.
Description
Technical field:
The present invention relates to a kind of Microbial Enhanced Oil Recovery, particularly a kind of microbe oil production method activating oil deposit deep part functional flora.
Background technology:
Microbial oil displacement comprises the inoculating microbe displacement of reservoir oil and the endogenous microbes displacement of reservoir oil two kinds, but these two kinds of methods all need to inject activator in oil reservoir, the external source bacterium of the endogenous bacterium in oil reservoir and injection can be activated and the metabolites such as a large amount of propagation generation biopolymer, biological surfactant, organic acid and biogas by these activator, utilize microorganism and metabolite and rock and fluid matasomatism, reduce oil water interfacial tension, improve the mobility of crude oil, thus improve oil recovery factor.After the exploitation of major part old filed enters the middle and later periods, on the one hand due to waterflooding extraction for many years, on the other hand hide the activator injected consumed in a large number by the endogenous microbes of oil reservoir near wellbore zone owing to implementing microbial oil displacement, cause near wellbore zone recovery ratio compared with high, remaining oil is few, oil saturation is low.Because most of activator is consumed in oil reservoir near wellbore zone, and only have a small amount of activator can migrate to oil deposit deep part, cause the displacement of reservoir oil function bacterium of oil deposit deep part to can not get effective activation, thus make that oil deposit deep part residual oil is more, oil saturation is higher, recovery percent of reserves is lower.Cause the activator injected to be wasted in a large number near wellbore zone on the one hand, cause microbial oil displacement to improve recovery ratio amplitude on the other hand little, this problem is also that part implements not high main cause of microbial oil displacement field trial efficiency.
For the problems referred to above, there is researcher to propose to utilize microcapsules to inject after activator embedding, thus activator can be avoided to be consumed at Injection Well near wellbore.But the microcapsule diameter usually prepared all arrives the scope of hundreds of micron tens, be difficult to penetrate into depths, stratum with injection, easily cause the blocking on stratum, and higher being not suitable for of the method cost carries out scene application.
Summary of the invention:
Object of the present invention is exactly in view of the foregoing defects the prior art has, a kind of microbe oil production method activating oil deposit deep part functional flora is provided, prevent functional flora in Injection Well near wellbore zone to the activator luxus consumption injected, make activator arrive oil reservoir depths and activate the inner displacement of reservoir oil function bacterium of oil reservoir, thus reach the object improving oil recovery factor.
Activate a microbe oil production method for oil deposit deep part functional flora, comprise the following steps:
A, first according to microbial oil displacement reservoir screening criteria carry out test block screening.
Secondly B, profile control agent screening and optimization is carried out according to test block reservoir geology situation, and field profile control is carried out to test block, profile control agent is made up of gel, polymer microballoon and walnut powder, mass concentration is respectively 4.5 ~ 5.0%, 1.5 ~ 2.0% and 0.5 ~ 1.0%, and profile control agent total injection is calculated as follows:
In formula:
v-activator volumetric usage, m
3;
r-radius of profile control, m;
h-effective pay thickiness, m;
ф-test block degree of porosity, decimal;
-use level coefficient, decimal (getting 0.7).
C, carry out activator screening and optimization, optimization activator according to group and nutrient distribution situation in test block production water.Activator is made up of carbon source, nitrogenous source and phosphorus source, and each injection rate is respectively 30 ~ 32m
3, 10 ~ 12m
3with 8 ~ 10m
3, total injection is 45 ~ 50m
3, mass concentration is respectively 1.5 ~ 2.0%, 0.5 ~ 0.8% and 0.3 ~ 0.5%.
Activator is injected at D, microbial oil displacement scene, and after field conduct 4 ~ 5 round, carry out determination and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid, sense cycle is 10 ~ 15d.
E, reach 1.5 × 10 when displacement of reservoir oil function bacterium concentration
8after individual/mL, 5 ~ 6 months first times injected biostatic agent, and biostatic agent mass concentration is 1.0 ~ 1.2%, and biostatic agent injection rate is calculated as follows:
（1）
In formula:
-inhibitor injection rate for the first time, kg;
-injecting inhibitor coefficient for the first time, span: 0.3 ~ 0.5;
-injecting inhibitor mass concentration for the first time, %;
-treatment radius for the first time, m;
-effective pay thickiness, m;
-test block degree of porosity, decimal.
Activator is injected in F, continuation, and when injection biostatic agent is after 10 ~ 12 months, carry out testing and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid, sense cycle is 10 ~ 15d;
G, reach 1.1 × 10 when displacement of reservoir oil function bacterium concentration
87 ~ 8 months second time after individual/mL inject biostatic agent, biostatic agent mass concentration 1.8 ~ 2.0%, and biostatic agent injection rate is calculated as follows:
（2）
In formula:
-second time injecting inhibitor injection rate, kg;
-second time injecting inhibitor coefficient, span: 0.5 ~ 0.8;
-second time injecting inhibitor concentration, mg/L;
-second time treatment radius, m;
-treatment radius for the first time, m;
-effective pay thickiness, m;
-test block degree of porosity, decimal.
Activator is injected in H, continuation, until field trial terminates, calculates microorganism and drives raising recovery ratio degree.
The invention has the beneficial effects as follows: (1) effectively improves activator migration distance and swept volume, migration distance improves 100 ~ 150m, and swept volume improves 30 ~ 40%; (2) effectively have activated the endogenous displacement of reservoir oil function bacterium of oil deposit deep part, after activating, function bacterium sum reaches 2.0 × 10
8individual/more than mL; (3) effectively improve microbial oil displacement oil recovery amplitude, improve recovery ratio amplitude and reach 10.0 ~ 15.0%.
Accompanying drawing illustrates:
Accompanying drawing 1 is implementation and operation flow chart of steps of the present invention.
Detailed description of the invention:
By reference to the accompanying drawings 1, the invention will be further described:
Embodiment 1: utilize method of the present invention to implement microbial oil displacement field trial at Shengli Oil Field block, concrete steps are as follows:
A, the screening of test block, hide screening criteria according to microbial oil displacement, filter out Shengli Oil Field river mouth oil recovery factory Luo block as microbial oil displacement field trial block.Reservoir buried depth 1680 ~ 1920m, reservoir temperature 75 ~ 80 DEG C, average pore 31.0%, mean permeability 211.7 ' 10
-3mm
2, oil area 1.25km
2, oil in place 98 ' 10
4t, oil reservoir effective thickness 6.5m, oil well number 14 mouthfuls, well number 5 mouthfuls.
B also optimizes profile control agent according to test block geology reservoir, and profile control agent is made up of gel, polymer microballoon and walnut powder, and mass concentration is respectively 4.6%, 1.8% and 0.7%, radius of profile control 9.0m, profile control agent total injection
=3.14 × 9.0
2× 6.5 × 0.31 × 0.7=358.74m
3.
C, filter out activator according to group and nutrient distribution situation in test block production water, activator is made up of carbon source, nitrogenous source and phosphorus source, and every round injection rate is respectively 30.5m
3, 10.5m
3and 9.0m
3, every round total injection 50m
3.Wherein carbon source is that 1:0.6:0.4 ratio forms by glucose, flour and sucrose by mass ratio, nitrogenous source is that 1:0.9:0.2 ratio forms by Dried Corn Steep Liquor Powder, bean powder and peptone by mass ratio, and phosphorus source is that 1:0.7:0.7 ratio forms by sodium dihydrogen phosphate, potassium dihydrogen phosphate and ammonium dihydrogen phosphate (ADP) by mass ratio.
Activator is injected at D, microbial oil displacement scene, and the activator injection cycle is 25d, and carry out determination and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid after field conduct 5 round, sense cycle is 15d.Testing result is as follows:
Table 1 injects production fluid displacement of reservoir oil function bacterium testing result after activator
| Detect number of times | Test result, 10 8Individual/mL |
| 1 | 0.1 |
| 2 | 0.1 |
| 3 | 0.3 |
| 4 | 0.5 |
| 5 | 0.8 |
| 6 | 1.1 |
| 7 | 1.6 |
E, on-the-spot production fluid detect that displacement of reservoir oil function bacterium density reaches 1.5 × 10 for the 7th time
8individual/mL, reach this concentration and inject biostatic agent clorox for the first time after 5 months, mass concentration is 1.1%, and treatment radius is 55m for the first time, and injection rate is m
1=1.1% × 0.4 × 3.1416 × 55
2× 6.5 × 0.31=84.26kg.
F, continuation cyclic injection activator, within 11 months, detect production fluid displacement of reservoir oil function bacterium concentration after first time injects biostatic agent clorox, sense cycle is 12 days, and testing result sees the following form:
Table 2 first time note biostatic agent rear-guard functional oil bacterium testing result
| Detect number of times | Test result, 10 8Individual/mL |
| 1 | 0.2 |
| 2 | 0.2 |
| 3 | 0.4 |
| 4 | 0.7 |
| 5 | 1.1 |
| 6 | 1.2 |
G, on-the-spot production fluid detect that displacement of reservoir oil function bacterium density reaches 1.2 × 10 for the 6th time
8individual/mL, reach this concentration and inject biostatic agent clorox for the second time after 8 months, mass concentration is 1.9%, and second time treatment radius is 95m, and biostatic agent injection rate is m
2=1.9% × 0.7 × 3.1416 × (95
2-55
2) × 6.5 × 0.31=504.0kg.
H, continuation cyclic injection activator, until field trial terminates.
This block microbial oil displacement is accumulative increases oil 12.25 ten thousand tons, improves recovery ratio 12.5%.
Embodiment 2: utilize method of the present invention to implement microbial oil displacement field trial at Shengli Oil Field Lin Pan oil recovery factory block, concrete steps are as follows:
A, the screening of test block, hide screening criteria according to microbial oil displacement, filter out Shengli Oil Field Lin Pan oil recovery factory Luo block as microbial oil displacement field trial block.Reservoir buried depth 1470 ~ 1580m, reservoir temperature 52 ~ 58 DEG C, average pore 32.5%, mean permeability 313.5 ' 10
-3mm
2, oil area 2.15km
2, oil in place 65 ' 10
4t, oil reservoir effective thickness 8.2m, oil well number 12 mouthfuls, well number 4 mouthfuls.
B also optimizes profile control agent according to test block geology reservoir, and profile control agent is made up of gel, polymer microballoon and walnut powder, and mass concentration is respectively 4.8%, 1.7% and 0.8%, radius of profile control 8.0m, profile control agent total injection
=3.14 × 8.0
2× 8.2 × 0.33 × 0.7=380.66m
3.
C, filter out activator according to group and nutrient distribution situation in test block production water, activator is made up of carbon source, nitrogenous source and phosphorus source, and every round injection rate is respectively 31.0m
3, 10.3m
3and 8.2m
3, every round total injection 49.5m
3.Wherein carbon source is that 1:0.7:0.45 ratio forms by glucose, flour and sucrose by mass ratio, nitrogenous source is that 1:0.95:0.15 ratio forms by Dried Corn Steep Liquor Powder, bean powder and peptone by mass ratio, and phosphorus source is that 1:0.75:0.62 ratio forms by sodium dihydrogen phosphate, potassium dihydrogen phosphate and ammonium dihydrogen phosphate (ADP) by mass ratio.
Activator is injected at D, microbial oil displacement scene, and the activator injection cycle is 23d, and carry out determination and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid after field conduct 4 round, sense cycle is 12d.Testing result is as follows:
Table 3 injects production fluid displacement of reservoir oil function bacterium testing result after activator
| Detect number of times | Test result, 10 8Individual/mL |
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.4 |
| 4 | 0.8 |
| 5 | 1.2 |
| 6 | 1.5 |
| 7 | 1.6 |
E, on-the-spot production fluid detect that displacement of reservoir oil function bacterium density reaches 1.5 × 10 for the 6th time
8individual/mL, reach this concentration and inject biostatic agent clorox for the first time after 6 months, mass concentration is 1.15%, and treatment radius is 58m for the first time, and injection rate is m
1=1.15% × 0.4 × 3.1416 × 58
2× 8.2 × 0.33=131.55kg.
F, continuation cyclic injection activator, within 10 months, detect production fluid displacement of reservoir oil function bacterium concentration after first time injects biostatic agent clorox, sense cycle is 12 days, and testing result sees the following form:
Table 4 first time note biostatic agent rear-guard functional oil bacterium testing result
| Detect number of times | Test result, 10 8Individual/mL |
| 1 | 0.1 |
| 2 | 0.1 |
| 3 | 0.5 |
| 4 | 0.8 |
| 5 | 1.0 |
| 6 | 1.1 |
G, on-the-spot production fluid detect that displacement of reservoir oil function bacterium density reaches 1.1 × 10 for the 6th time
8individual/mL, reach this concentration and inject biostatic agent clorox for the second time after 7 months, mass concentration is 1.95%, and second time treatment radius is 98m, and biostatic agent injection rate is m
2=1.95% × 0.7 × 3.1416 × (98
2-58
2) × 8.2 × 0.33=724.05kg.
H, continuation cyclic injection activator, until field trial terminates.
Shengli Oil Field Lin Pan oil recovery factory block microbial oil displacement is accumulative increases oil 8.78 ten thousand tons, improves recovery ratio 13.5%.
Embodiment 3: utilize method of the present invention to implement microbial oil displacement field trial at Gudao area of Shengli Oilfield oil recovery factory block, concrete steps are as follows:
A, the screening of test block, hide screening criteria according to microbial oil displacement, filter out Gudao area of Shengli Oilfield oil recovery factory block as microbial oil displacement field trial block.Reservoir buried depth 1890 ~ 1975m, reservoir temperature 72 ~ 78 DEG C, average pore 33.0%, mean permeability 1258.5 ' 10
-3mm
2, oil area 4.32km
2, oil in place 125 ' 10
4t, oil reservoir effective thickness 7.5m, oil well number 18 mouthfuls, well number 6 mouthfuls.
B also optimizes profile control agent according to test block geology reservoir, and profile control agent is made up of gel, polymer microballoon and walnut powder, and mass concentration is respectively 4.7%, 1.9% and 0.9%, radius of profile control 8.5m, profile control agent total injection
=3.14 × 8.5
2× 7.5 × 0.33 × 0.7=393.04m
3.
C, filter out activator according to group and nutrient distribution situation in test block production water, activator is made up of carbon source, nitrogenous source and phosphorus source, and every round injection rate is respectively 31.0m
3, 10.3m
3and 8.2m
3, every round total injection 49.5m
3.Wherein carbon source is that 1:0.5:0.5 ratio forms by glucose, flour and sucrose by mass ratio, nitrogenous source is that 1:0.8:0.3 ratio forms by Dried Corn Steep Liquor Powder, bean powder and peptone by mass ratio, and phosphorus source is that 1:0.6:0.7 ratio forms by sodium dihydrogen phosphate, potassium dihydrogen phosphate and ammonium dihydrogen phosphate (ADP) by mass ratio.
Activator is injected at D, microbial oil displacement scene, and the activator injection cycle is 30d, and carry out determination and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid after field conduct 5 round, sense cycle is 13d.Testing result is as follows:
Production fluid displacement of reservoir oil function bacterium testing result after table 5 note activator
| Detect number of times | Test result, 10 8Individual/mL |
| 1 | 0.2 |
| 2 | 0.2 |
| 3 | 0.5 |
| 4 | 0.8 |
| 5 | 0.9 |
| 6 | 1.2 |
| 7 | 1.5 |
E, on-the-spot production fluid detect that displacement of reservoir oil function bacterium density reaches 1.5 × 10 for the 7th time
8individual/mL, reach this concentration after 6 months first time inject biostatic agent glutaraldehyde, mass concentration is 1.2%, first time treatment radius be 52m, injection rate is m
1=1.2% × 0.4 × 3.1416 × 52
2× 7.5 × 0.33=100.92kg.
F, continuation cyclic injection activator, within 10 months, detect production fluid displacement of reservoir oil function bacterium concentration after first time injects biostatic agent glutaraldehyde, sense cycle is 13 days, and testing result sees the following form:
Table 6 first time note biostatic agent rear-guard functional oil bacterium testing result
| Detect number of times | Test result, 10 8Individual/mL |
| 1 | 0.1 |
| 2 | 0.1 |
| 3 | 0.3 |
| 4 | 0.5 |
| 5 | 1.0 |
| 6 | 1.1 |
G, on-the-spot production fluid detect that displacement of reservoir oil function bacterium density reaches 1.1 × 10 for the 6th time
8individual/mL, reach this concentration and inject biostatic agent glutaraldehyde for the second time after 7 months, mass concentration is 1.8%, and second time treatment radius is 97m, and biostatic agent injection rate is m
2=1.8% × 0.6 × 3.1416 × (97
2-52
2) × 7.5 × 0.33=562.55kg.
H, continuation cyclic injection activator, until field trial terminates.
Shengli Oil Field Lin Pan oil recovery factory block microbial oil displacement is accumulative increases oil 14.0 ten thousand tons, improves recovery ratio 11.2%.
Claims (3)
1. activate a microbe oil production method for oil deposit deep part functional flora, it is characterized in that comprising the following steps:
A, first according to microbial oil displacement reservoir screening criteria carry out test block screening;
Secondly B, profile control agent screening and optimization is carried out according to test block reservoir geology situation, and field profile control is carried out to test block, field profile control treatment radius is 8 ~ 10m, profile control agent is made up of gel, polymer microballoon and walnut powder, and mass concentration is respectively 4.5 ~ 5.0%, 1.5 ~ 2.0% and 0.5 ~ 1.0%;
C, carry out activator screening and optimization, optimization activator according to group and nutrient distribution situation in test block production water;
Activator is made up of carbon source, nitrogenous source and phosphorus source, and each injection rate is respectively 30 ~ 32m
3, 10 ~ 12m
3with 8 ~ 10m
3, total injection is 45 ~ 50m
3, mass concentration is respectively 1.5 ~ 2.0%, 0.5 ~ 0.8% and 0.3 ~ 0.5%;
Activator is injected at D, microbial oil displacement scene, and after field conduct 4 ~ 5 round, carry out determination and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid, sense cycle is 10 ~ 15d;
E, reach 1.5 × 10 when displacement of reservoir oil function bacterium concentration
8after individual/mL, 5 ~ 6 months first times injected biostatic agent, and biostatic agent mass concentration is 1.0 ~ 1.2%;
Activator is injected in F, continuation, and when injection biostatic agent is after 10 ~ 12 months, carry out testing and analysis to the displacement of reservoir oil function bacterium concentration in target reservoir production fluid, sense cycle is 10 ~ 15d;
G, reach 1.1 × 10 when displacement of reservoir oil function bacterium concentration
87 ~ 8 months second time after individual/mL inject biostatic agent, biostatic agent mass concentration 1.8 ~ 2.0%;
Activator is injected in H, continuation, until field trial terminates, calculates microorganism and drives raising recovery ratio degree;
Described biostatic agent is clorox as oxidative bactericide or glutaraldehyde as non-oxidative bactericide; Described biostatic agent first time treatment radius is 50 ~ 60m, and second time treatment radius is 90 ~ 100m.
2. the microbe oil production method of activation oil deposit deep part functional flora according to claim 1, it is characterized in that: the carbon source of activator by glucose, flour and sucrose in 1:(0.5 ~ 0.8): (0.3 ~ 0.5) ratio forms, nitrogenous source by Dried Corn Steep Liquor Powder, bean powder and peptone in 1:(0.8 ~ 1.0): (0.1 ~ 0.3) ratio forms, phosphorus source by sodium dihydrogen phosphate, potassium dihydrogen phosphate and diammonium hydrogen phosphate in 1:(0.6 ~ 0.8): (0.6 ~ 0.8) ratio forms.
3. the microbe oil production method of activation oil deposit deep part functional flora according to claim 2, is characterized in that: described activator at the scene injection order is phosphorus source, nitrogenous source and carbon source, and activator injection mode is cyclic injection, and the injection cycle is 20 ~ 30d.
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| CN114427410A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | Method for converting thermal recovery reservoir into microbial oil displacement |
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