CN114542029A - Nano-assisted biological hydrogenation thickened oil production increasing method - Google Patents
Nano-assisted biological hydrogenation thickened oil production increasing method Download PDFInfo
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- CN114542029A CN114542029A CN202210093887.8A CN202210093887A CN114542029A CN 114542029 A CN114542029 A CN 114542029A CN 202210093887 A CN202210093887 A CN 202210093887A CN 114542029 A CN114542029 A CN 114542029A
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Abstract
The invention discloses a nano-assisted biological hydrogenation heavy oil yield increase method, and relates to the technical field of oil exploitation. Which comprises the following steps: analyzing reservoir condition information of the heavy oil block; preparing a combined hydrogen production preparation and a nano material; and injecting the combined hydrogen production preparation and the nano material into an oil reservoir of the heavy oil block. The method mainly adopts microorganisms to synthesize hydrogen in situ under the assistance of nano materials and utilizes the hydrogen to modify the thickened oil to form the main thickened oil exploitation method, aiming at different viscosities and different oil deposit conditions, the microorganisms which synthesize the hydrogen under the anaerobic or facultative anaerobic condition grow, and the generated hydrogen performs hydrogenation modification on the thickened oil in the oil deposit under the assistance of the nano materials, so that a series of physical and chemical properties of the thickened oil are changed, such as the equivalent reduction of acid value, heavy metal content, sulfur content and carbon-hydrogen ratio, and the method has the functions of reducing resistance, reducing viscosity, reducing coagulation, improving the seepage capability and quality of the thickened oil and the like, thereby greatly improving the recovery ratio of the thickened oil.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a biological exploitation method applied to exploitation or recovery of thick oil resources.
Background
The exploration, development and utilization of heavy oil reservoir resources are listed as the key fields and the priority theme of future research and development; the technology for exploring and researching sustainable development, economical and effective thickened oil recovery improvement has great significance for keeping the sustainable development of the petroleum industry and the national economy of China. The second petroleum consumer world in China becomes the fourth petroleum producing country in the world, and meanwhile, the external dependence of petroleum (thickened oil and oil products) in China is over 70 percent. Therefore, the research on the development technology of the thickened oil shifts the emphasis on the production of the thickened oil, and has important strategic significance for meeting the increasing demand of petroleum in China and obtaining initiative position for the fierce competition of petroleum resources in the 21 st century internationally. The development of thick oil resources is a great worldwide problem, and the key technical bottleneck is viscosity reduction and increase of underground seepage capacity of thick oil. The main mechanism of modifying and viscosity reducing is that the molecular structure of heterocycle in thickened oil colloid or asphaltene is destroyed or the stacking mode is improved, the carbon-hydrogen ratio is increased, or the intermolecular action caused by nitrogen, sulfur, oxygen atoms or metal elements is destroyed. At present, viscosity reduction of thick oil depends on heat, gas or blending or chemical methods, but the methods have high cost and heavy pollution and are still in a small-scale test stage. In particular, thickened oil thermal recovery is the most effective recovery method at present, but the later-stage heat dissipation is fast, the steam channeling is serious, an effective heat cavity cannot be formed, the effective spread range is small, the recovery ratio is gradually reduced, and the residual oil cannot be restarted. Under the situation, the biological oil production technology is receiving worldwide attention as a sustainable development environment-friendly heavy oil production increasing technology. However, the effect of biotechnology on thick oil recovery is not obvious, and the key reasons are that the mechanism of thick oil viscosity mechanism, the expression of thick oil reservoir functional microorganisms and their functional genes under the condition of thick oil reservoir, and the influence of environmental factors on functional expression are not known. Therefore, the biological combination enhanced viscosity reduction of the thick oil and the system development are very important for thick oil exploitation.
In the process of oil exploitation in an oil field, the accumulation of organic heavy components (colloid asphaltene) in the thickened oil on the surface of a stratum or a pipeline often occurs, so that the flow passage of water or the thickened oil is narrowed, the effective permeability is reduced, and the oil exploitation is seriously influenced. Meanwhile, the thickened oil has the characteristics of high viscosity, high density, high acid value, high sulfur content and the like due to high asphaltene and colloid content; the near wellbore area or the wellbore is blocked and has poor mobility, so normal production is difficult. At present, the thick oil development modes are thermal recovery, gas recovery or modes of adding organic solvents or chemical agents and the like, and then the modes have high cost and heavy pollution, can only carry out a small-range test and cannot meet the requirement of environmental protection popularization. Therefore, an environment-friendly and practical thick oil recovery technology is urgently needed. The production increasing technology of thermal oil recovery, chemical oil displacement, gas injection oil displacement and the like is a conventional tertiary oil recovery technology. Thermal oil recovery is an effective technology applied in thick oil recovery at present, and is to introduce a heat source (hot water, steam or fire) into an oil layer and improve the recovery ratio by reducing the viscosity of thick oil and improving the fluidity. But has obvious disadvantages: the effect is obviously reduced in the middle and later periods due to factors such as the over-high flow speed of a heat source, the fingering phenomenon, the deterioration of formation conditions and the like; the cost is too high, and the large-area popularization is not realized. The chemical oil displacement technology is characterized in that a chemical agent is added in the water injection process, the water displacement performance is improved, the sweep efficiency is increased, and the viscous oil viscosity and the oil-water interfacial tension are reduced through emulsification to improve the recovery ratio of the viscous oil. At present, although a chemical oil displacement technology is used more, the chemical oil displacement technology faces various challenges such as poor application conditions (temperature resistance, salt resistance, influence of salinity of underground water and the like) of chemical agents, high construction process requirements, high difficulty in oil-water separation, difficulty in sewage treatment, serious damage to stratums and the like; since sufficient emulsification is difficult to form when energy such as turbulence is not entered underground. The gas injection oil displacement is a technology for improving the recovery efficiency by injecting a certain amount of carbon dioxide, nitrogen or hydrocarbon gas into an oil reservoir, reducing the viscosity of thick oil and expanding the volume of the thick oil to form miscible or immiscible oil displacement, and is an effective recovery technology for a deep and low-permeability oil reservoir.
Multiple reactions such as cracking, hydrogenation and the like occur in the thick oil hydrotreating process, and the structural composition is changed, which means that asphaltene molecules become small and the relative molecular mass is reduced along with the deep progress of the hydrogenation reaction; the sulfur content of the asphaltene is reduced after the hydrogenation reaction; the metal is detached. After the alkyl side chains on the condensed aromatic unit sheets in the asphaltene molecule, which are more easily removed, are broken, the asphaltenes strip the unit sheets from the asphaltene structure, primarily by breaking the various bridges connecting the unit sheets, resulting in the formation of relatively small molecules. Therefore, in the hydrogenation process, the asphaltenes mainly take part in the reaction by taking the unit slices as basic units.
In addition, in view of the medium and high permeability oil field developed by water injection, the exploitation degree of underground thick oil resources is low because bottom water or edge water is rich, or because a high-water-content channel is formed by long-term water injection, or because the storage heterogeneity is strong and effective displacement cannot be formed. Meanwhile, many low-permeability oil fields have low permeability, difficult water injection, low oil washing efficiency of water drive, small swept volume, high water injection pressure and difficult development. These problems with the development of oilfield resources require new oil recovery techniques to address. The biological exploitation technology provided by the invention is a novel oil exploitation technology, and is a thickened oil exploitation technology formed by combining the mechanism of traditional oil field chemicals with a microbial technology and aiming at the composition of thickened oil. Under the high requirement of environmental protection, a brand-new and environment-friendly heavy oil recovery method is urgently needed for the oil field to meet the high requirement of oil field production.
For example, the Chinese patent application number: CN201110096394.1, publication No.: CN102732424A discloses a compound oil extraction microorganism and application thereof in the recovery of heavy oil and extra heavy oil, and the technical scheme is as follows:
"a built oil recovery microorganism, it is a built viscosity-reducing microorganism, said microorganism is a built microbial inoculum, according to the dry weight, the formulation is: 30-40% of Rhodococcus equi BS 001; 60 to 70 percent of bacillus subtilis BS 002. BS001 with preservation number of CGMCC No.3885 and preservation date of 1/6/2010 (Meixiandan, Paofei, Liu, etc., a complex microbial inoculum and a biological method for treating flowback fracturing fluid as oil displacement active water, and the patent application number of 201010215973.9); the preservation number of BIT09S1 is CGMCC No.2947, and the preservation date is 2009, 3 months and 11 days (preparation method of bacillus subtilis and lipopeptide biosurfactant, and the patent application number is 200910300898.3). The preservation units are China general microbiological culture Collection center.
The method for exploiting the extra-heavy oil of the heavy oil by utilizing the compound oil-exploiting microbes comprises the following steps: injecting the compound oil extraction microbial fermentation liquor, nutrient solution and optimizing agent into an oil well or a water well in a single-well huff-puff or water injection process mode, and recovering normal extraction after closing the well for 3-30 days;
the nutrient solution is as follows: 2.5-4.5 kg of monopotassium phosphate is contained in each cubic meter of water; 0.7-1.4 kg of disodium hydrogen phosphate; 0.5-0.9 kg of ammonium chloride; the water used for preparing the nutrient solution is reinjection water after the treatment of the oil field united station, the temperature is between 20 and 65 ℃, and the pH value is between 6.0 and 9.0.
The optimizing agent is glycolipid surfactant produced by microorganisms and is prepared by purification and concentration. The specific method comprises the following steps: centrifuging the fermentation liquid at 8000rpm for 20min to remove thallus, freeze drying the supernatant to obtain powder, dissolving with methanol, centrifuging at 10000rpm to remove impurities, steaming the supernatant at 50 deg.C to obtain slurry, dissolving with 0.05M NaHCO3, adjusting pH to 2.0 with concentrated hydrochloric acid, standing at 4 deg.C overnight, centrifuging at 10000rpm, and collecting precipitate to obtain the final product.
However, the above patents have many problems: the microbial agent has poor growth effect, and poor effects of stripping and reducing viscosity of thick oil.
Disclosure of Invention
In view of the above, the present invention provides a biological recovery method for heavy oil resource recovery, which organically combines a special hydrogen-producing microbial agent or a nano material or a nutrient to form a series of multi-element/different types of heavy oil biological recovery methods. It aims at the degradation of polycyclic or heteropolycyclic heavy components causing viscosity in thick oil, the dissolution and extraction of biogas, and the emulsification dispersion and solubilization of microbial fermentation products. Can effectively solve the problem of the development process of the thickened oil: for example, the viscosity of the thickened oil is high, and the seepage resistance is high; heavy components (waxy and colloid asphaltene) of the heavy oil cause adsorption and aggregation on the surface of a stratum, a near-wellbore area or a pipeline and the like, so that the flow passage of water or the heavy oil is narrowed, the effective permeability is reduced, and the problems of serious influence on oil exploitation and the like are solved. The most important is that the biological exploitation method takes biotechnology as a core, adopts a multi-element mode of multifunctional combination, and adopts chemicals prepared by microbial fermentation as main components, thereby having the characteristics of no toxicity, no harm, ecological environmental protection and the like; the effects of better stripping, viscosity reduction and the like are improved.
In order to realize the aim, the invention discloses a method for increasing the yield of nanometer auxiliary biological hydrogenation heavy oil,
a nano-assisted biological hydrogenation thickened oil production increasing method comprises the following steps:
(1) analyzing reservoir condition information of the heavy oil block; aiming at different heavy oil reservoir conditions, special microbial agents or nano materials or nutritional agents and the like are combined.
(2) Preparing a combined hydrogen production preparation and a nano material according to the oil reservoir condition information of the heavy oil block obtained in the step (1);
(3) and (3) injecting the combined hydrogen production preparation obtained in the step (2) and the nano material into an oil reservoir of the heavy oil block. The microbial agent-hydrogen production nutrient agent-nano material and other organic components are combined to form an oil reservoir targeted high-efficiency hydrogen production system, so that the recovery ratio of the target heavy oil reservoir is improved. Combinations include, but are not limited to: the microbial agent is combined with the hydrogen production nutrient, the microbial agent is combined with the nano material, the hydrogen production nutrient is combined with the nano material, the microbial agent-the hydrogen production nutrient-the nano material are combined, and other various combinations are combined.
In summary, preparing a nutrient according to the growth and metabolism characteristics of each microorganism, injecting the nutrient into an oil reservoir to enable specific microorganisms injected into the oil reservoir to grow, or activating oil reservoir indigenous hydrogen-producing microorganisms to grow and synthesize hydrogen under the oil reservoir condition; the generated hydrogen can change the physical and chemical properties of the heavy oil under the assistance of the nano material, and the properties such as the solidifying point, the viscosity, the metal content, the sulfur content, the carbon-hydrogen ratio, the acid value and the like of the hydrogenated heavy oil are all reduced, so that the seepage capability of the heavy oil in an oil reservoir is improved, and the recovery ratio is greatly improved. The special microbial agent or the nano material or the nutrient agent is combined according to a certain proportion to form a multi-element system aiming at different heavy oil, the multi-element system is diluted and attached to a certain range and then injected into an oil layer, and the original hydrogenation of the target heavy oil reservoir is realized through the activities of hydrogen production and the like to improve the recovery ratio.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the oil reservoir condition information of the heavy oil block in the step (1) is as follows:
reservoir geological characteristics, oil well production conditions, reservoir minerals, formation water and heavy oil components, and heavy oil viscosity-temperature curves.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the combined hydrogen-producing preparation in the step (2) comprises 6-18% of microbial agent, 10-15% of hydrogen-producing nutrient solution, 0.031-0.14% of auxiliary agent and the balance of water in percentage by mass;
the preparation method of the combined hydrogen production preparation comprises the following steps:
adding water, sequentially adding the microbial agent, the hydrogen-producing nutrient solution and the auxiliary agent, and fully stirring. It should be noted that the preparation process comprises the following steps: preparing water solution of special microbial agent at a certain ratio (ensuring the concentration of thallus cells to be at least 10)6cfu/ml); fully stirring; then adding hydrogen-producing nutrient or nano material according to the combined proportion, fully stirring.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the microbial agent is one or more of Citrobacter, Clostridium, Enterobacter, Cyanobacter, Klebsiella, Bacillus, Thermophiles, Synechococcus, Thermoanaerobacterium, Streptomyces and Chrobi;
the microbial agent is fermented to obtain a liquid microbial agent or a dry powder microbial agent.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the hydrogen-producing nutrient solution comprises the following components in percentage by mass:
the pH value of the hydrogen-producing nutrient solution is 7, and the range of the pH value can be 6-9 during specific use.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the nano material in the step (2) is one or more of silicon dioxide, aluminum oxide, titanium dioxide, zinc oxide, copper oxide, manganese oxide, graphene, ferrous chloride, ferric oxide and magnesium oxide.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the monosaccharide or oligosaccharide is one or more of glucose, fructose, maltose, sucrose, lactose, rhamnose, arabinose, starch hydrolysate and lignocellulose hydrolysate.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the nitrogen source is urea and NaNO3One or more of protein hydrolysate, ammonium chloride and whey.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the small molecular acid is one or more of formic acid, acetic acid, propionic acid and butyric acid.
In the nano-assisted biological hydrogenation thickened oil production increasing method,
the small molecular alcohol is one or more of methanol, ethanol, propanol and butanol.
When the method is used, after the special microbial agent, the hydrogen-producing nutrient, the nano material and the like are combined and diluted by a certain multiple, the mixture is injected into an oil layer through an oil pipe or an annulus by a pump truck and a tank truck (or other pressure equipment) to carry out oil well huff and puff or water well displacement, so that the yield of the thick oil is improved; or put into a thick oil storage tank or a residual oil pit (tank) for mixing to modify the oil product.
The nano-assisted biological hydrogenation thickened oil production increasing method provided by the technical scheme has the following beneficial effects:
the method provided by the invention is a heavy oil exploitation method which mainly adopts the steps of synthesizing hydrogen in situ by microorganisms and modifying heavy oil by utilizing the hydrogen under the assistance of nano materials, and is used for developing or recovering heavy oil resources or used for unblocking a heavy oil well or conveying the heavy oil. Specifically, a culture medium is prepared according to the growth and metabolism characteristics of each microorganism, a microbial agent is prepared in a ground fermentation tank and is injected into an oil reservoir, so that the microbial agent grows and synthesizes hydrogen under the oil reservoir condition; meanwhile, the effects of strengthening and promoting viscosity reduction of the thick oil and increasing the oil phase seepage capability are achieved, the functions of the hydrogen-producing microbial agent, the hydrogen-producing nutritional agent and the nano material in modifying and viscosity reduction of the thick oil are fully utilized, and the quality, viscosity reduction rate and effect of the thick oil are improved. The biological exploitation method is a multi-element and multi-functional system, the system adapts to a wider temperature and mineralization range, can be suitable for geological environments and fluid characteristics of various heavy oil reservoirs, and simultaneously, oil recovery medicaments formed by combining the system can be stored for a long time. In addition, the special microorganism can synthesize a large amount of hydrogen in an oil reservoir environment, can better realize in-situ hydrogen production and heavy oil hydrogenation of the oil reservoir, can efficiently carry out colloid asphaltene hydrogenation in a large area, promotes the conversion of a macromolecule stacking state and intermolecular force to micromolecules, and obviously reduces the viscosity of the heavy oil. The invention carries out the heavy oil hydrogenation modification by a biological method, thereby not only protecting the environment, reducing the carbon emission, saving the energy, but also improving the efficiency.
Drawings
FIG. 1 is a diagram of an apparatus for a displacement experiment in example 6 of the present invention;
FIG. 2 is a schematic view of an apparatus for physical simulation evaluation of oil recovery in example 7 of the present invention;
FIG. 3 is a test chart of the combined hydrogen production preparation A huff and puff for the Jilin thick oil well in example 8 of the present invention;
FIG. 4 is a test of throughput of the combined hydrogen production preparation B for Liaohe heavy oil well in example 8 of the present invention;
FIG. 5 is a throughput test of the Nanyang heavy oil well combined hydrogen production preparation C in example 8 of the present invention;
FIG. 6 is a huff and puff test of the combined hydrogen-producing preparation D for the Xinjiang thick oil well in example 8 of the invention.
Detailed Description
The present invention is described in detail below with reference to specific examples, but the use and purpose of these exemplary embodiments are merely to exemplify the present invention, and do not set any limit to the actual scope of the present invention, and the scope of the present invention is not limited thereto.
Unless otherwise indicated, the following examples refer to formulations wherein the% are by weight.
Example 1
The nano-assisted biological hydrogenation thickened oil production increasing method comprises the following steps:
(1) analyzing the reservoir geological characteristics of a thickened oil block of the Jilin oil field, the production condition of an oil well, reservoir minerals, formation water and thickened oil components and a thickened oil viscosity-temperature curve;
(2) according to the information in (1), the method optimizes the following combinations: the hydrogen production nutrient solution comprises 6 mass percent of microbial agent, 10 mass percent of hydrogen production nutrient solution, 0.05 mass percent of ferric oxide and the balance of water. The microbial agent is prepared by fermenting Clostridium bacteria, and the combined hydrogen production preparation A is obtained by uniformly mixing according to the preparation method.
Wherein the microbial agent is prepared by fermenting Clostridium microbial inoculum, and the culture medium for preparation comprises corn syrup and KH2PO4Yeast powder, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 108cfu/ml。
The hydrogen-producing nutrient solution comprises the following components: 4 percent of corn syrup, 3 percent of glucose and 1.0 percent of KH (KH)2PO40.06% of urea, 0.01% of formic acid, 0.5% of yeast powder, 0.2% of vitamin C and the pH value of the special culture medium is 7.
The preparation process of the combined hydrogen production preparation A can adopt the following steps: adding water, sequentially adding microbial agent, hydrogen-producing nutrient solution and ferric oxide, and stirring.
(3) The effect of the combined hydrogen production preparation A on the hydro-upgrading of Jilin thick oil, the effect of improving the seepage capability and the like are tested indoors.
Mixing the combined hydrogen production preparation A and the heavy oil in an intermediate container according to an oil-water ratio (7:3), removing air in the intermediate container in a nitrogen introducing mode, maintaining the pressure in the container as the oil reservoir pressure, placing the container at the oil reservoir temperature (45 ℃) for culturing for 20 days, recording the pressure change of the intermediate container in the culturing process, and taking a gas sample at regular time for chromatographic analysis.
After the culture, the intermediate container is opened, the liquid in the intermediate container is subjected to oil-water separation, and the obtained crude oil is compared with the change of components, viscosity, acid value, sulfur content, metal content and the like before and after the culture. The gas produced in the intermediate vessel was 58% hydrogen and 32% CO by gas chromatography2And other nitrogen; through analysis of the components of the thickened oil, the colloid and asphalt components in the thickened oil are obviously reduced before and after the cultivation, the relative content of saturated hydrocarbon and aromatic hydrocarbon is obviously increased, and the content of S-containing hydrocarbon and N-containing hydrocarbon is reduced; the acid value, the sulfur content, the C/H ratio, the metal content and the like are all reduced, and the table 1 shows. The viscosity of the crude oil (at 45 ℃) is reduced to 1400 centipoises from 2503 centipoises before culture, so that the physicochemical property of the crude oil is obviously changed after the in-situ microbial agent hydrogenation of the combined hydrogen production preparation A, the quality of the thick oil is improved, the viscosity is reduced, and the thick oil is beneficial to production and transportation.
TABLE 1 composition change of Jilin crude oil after culture of Combined Hydrogen production preparation A
Example 2
The nanometer auxiliary biological hydrogenation thickened oil production increasing method comprises the following steps:
(1) and (3) analyzing the reservoir geological characteristics of a thickened oil block of the Liaohe oil field, the oil well production condition, reservoir minerals, formation water and thickened oil components and a thickened oil viscosity-temperature curve.
(2) According to the information in (1), the method optimizes the following combinations: the special microbial agent is 10 percent, the hydrogen production nutrient solution is 20 percent, the titanium dioxide is 0.03 percent, the graphene is 0.001 percent, and the balance is water. The special microbial agent is prepared by fermenting Citrobacter bacteria, and the special microbial agent is uniformly mixed according to the preparation method to obtain the combined hydrogen production preparation B.
Wherein the special microbial agent is prepared by fermenting Citrobacter microbial agent, and the culture medium used for preparation comprises glucose and K2HPO4Yeast powder and calcium carbonate, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 109cfu/ml。
The hydrogen-producing nutrient solution comprises the following components: by mass percentage, 10% of maltose, 3% of glucose and 1.0% of KH2PO41.0% of NaNO30.1 percent of yeast powder, 0.1 percent of vitamin C and the pH value of the special culture medium is 7.
The preparation process of the combined hydrogen production preparation B can adopt the following steps: adding water, then sequentially adding the special microbial agent, the hydrogen-producing nutrient solution, the titanium dioxide and the graphene, and fully stirring.
(3) The effect of the combined hydrogen production preparation B on the hydro-upgrading of Liaohe thick oil, the seepage capability improvement and the like is tested indoors.
Mixing the combined hydrogen production preparation B and the heavy oil in an intermediate container according to an oil-water ratio (7:3), removing air in the intermediate container in a nitrogen introducing mode, maintaining the pressure in the container as the oil reservoir pressure, placing the container at the oil reservoir temperature (35 ℃) for culturing for 15 days, recording the pressure change of the intermediate container in the culturing process, and periodically taking a gas sample for chromatographic analysis.
After the culture, the intermediate container is opened, the liquid in the intermediate container is subjected to oil-water separation, and the obtained crude oil is compared with the change of components, viscosity, acid value, sulfur content, metal content and the like before and after the culture. The gas produced in the intermediate vessel was analyzed by gas chromatography to be 80% hydrogen and 12% CO2And other nitrogen gases. Through analysis of the components of the thickened oil, the colloid and asphalt components in the thickened oil are obviously reduced before and after the cultivation, the relative content of saturated hydrocarbon and aromatic hydrocarbon is obviously increased, and the content of S-containing hydrocarbon and N-containing hydrocarbon is reduced; the acid value, sulfur content, C/H ratio, metal content, etc. were all decreased as shown in Table 2. The viscosity of the crude oil (at 35 ℃) is reduced to 825 centipoises from 5658 centipoises before culture, so that the physicochemical property of the crude oil is obviously changed after the in-situ microbial agent hydrogenation of the combined hydrogen production preparation B, the quality of the thick oil is improved, the viscosity is reduced, and the thick oil is beneficial to production and transportation.
TABLE 2 component change of Liaohe crude oil after the combined hydrogen production preparation B is cultured
Example 3
The nano-assisted biological hydrogenation thickened oil production increasing method comprises the following steps:
(1) and (3) analyzing the geological characteristics of the oil reservoir of a certain thick oil block of the Nanyang oil field, the production condition of the oil well, reservoir minerals, formation water and thick oil components and a thick oil viscosity-temperature curve.
(2) According to the information in (1), the method optimizes the following combinations: the special microbial agent is 12 percent, the hydrogen production nutrient solution is 15 percent, the zinc oxide is 0.1 percent, the copper oxide is 0.02 percent, the manganese oxide is 0.02 percent, and the balance is water. The special microbial agent is prepared by fermenting Thermoanaerobacterium and Bacillus respectively (the mass ratio is 1: 1), and the special microbial agent and the Bacillus are uniformly mixed according to the preparation method to obtain the combined hydrogen production preparation C.
Wherein the special microbial agent is prepared by fermenting a Thermoanaerobacterium microbial agentPrepared by the method, and the culture medium used for preparing the culture medium contains glucose and K2HPO4Yeast powder and calcium carbonate, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 109cfu/ml。
Wherein the special microbial agent is prepared by fermenting Bacillus microbial agent, and the culture medium used for preparation comprises sucrose and K2HPO4Yeast powder and magnesium sulfate, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 1010cfu/ml。
The hydrogen-producing nutrient solution comprises the following components: 10 percent of glucose and 1.0 percent of KH by mass percentage2PO41.0% of ammonium chloride, 2% of whey, 0.2% of yeast powder, 0.1% of vitamin C, 0.1% of formic acid and 0.1% of ethanol, wherein the pH value of the special culture medium is 7.
The preparation process of the combined hydrogen production preparation C can adopt the following steps: adding water, sequentially adding a special microbial agent Citrobacter bacteria, a special microbial agent Bacillus, a hydrogen-producing nutrient solution, zinc oxide, copper oxide and manganese oxide, and fully stirring.
(3) The effect of the combined hydrogen production preparation C on the hydrogenation modification of the south Yang thickened oil, the seepage capability improvement and the like is tested indoors.
Mixing the combined hydrogen production preparation C and the heavy oil in an intermediate container according to an oil-water ratio (7:3), removing air in the intermediate container in a nitrogen introducing mode, maintaining the pressure in the container as the oil reservoir pressure, placing the container at the oil reservoir temperature (60 ℃) for culturing for 30 days, recording the pressure change of the intermediate container in the culturing process, and taking a gas sample at regular time for chromatographic analysis.
After the culture, the intermediate container is opened, the liquid in the intermediate container is subjected to oil-water separation, and the obtained crude oil is compared with the change of components, viscosity, acid value, sulfur content, metal content and the like before and after the culture. The gas produced in the intermediate vessel was 65% hydrogen and 30% CO by gas chromatography2And other nitrogen gases. Through analysis of the components of the thickened oil, the colloid and asphalt components in the thickened oil are obviously reduced before and after the cultivation, the relative content of saturated hydrocarbon and aromatic hydrocarbon is obviously increased, and the content of S-containing hydrocarbon and N-containing hydrocarbon is reduced; acid value and sulfur contentThe C/H ratio, the metal content and the like are all reduced, and the table 3 shows. The viscosity of the crude oil (at 60 ℃) is reduced to 526 centipoises from 3338 centipoises before culture, so that the physicochemical properties of the crude oil are obviously changed after the in-situ microbial agent hydrogenation of the combined hydrogen production preparation C, the quality of the thick oil is improved, the viscosity is reduced, and the thick oil is beneficial to production and transportation.
TABLE 3 composition change of crude oil of Nanyang after culture of combined hydrogen production preparation C
Example 4
The nano-assisted biological hydrogenation thickened oil production increasing method comprises the following steps:
(1) and (3) analyzing the reservoir geological characteristics, the oil well production condition, reservoir minerals, formation water and heavy oil components and the heavy oil viscosity-temperature curve of a certain heavy oil block of the Xinjiang oil field.
(2) According to the information in (1), the method optimizes the following combinations: the special microbial inoculum comprises, by mass, 12% of a special microbial inoculum, 12% of a hydrogen production nutrient solution, 0.02% of silicon dioxide, 0.02% of aluminum oxide and the balance of water. The special microbial agent is prepared by fermenting Enterobacter and Klebsiella respectively (mass ratio is 1: 1), and the special microbial agent and the Klebsiella are uniformly mixed according to the preparation method to obtain the combined hydrogen production preparation D.
Wherein the special microbial agent is prepared by fermenting Enterobacter microbial agent, and the culture medium used for the preparation comprises glucose and K2HPO4Yeast powder and calcium carbonate, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 109cfu/ml。
Wherein the special microbial agent is prepared by fermenting Klebsiella microbial agent, and the culture medium used for preparing the special microbial agent contains starch hydrolysate and K2HPO4Yeast powder, chlorinationCalcium, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 1010cfu/ml。
The hydrogen-producing nutrient solution comprises the following components: 10 percent of starch hydrolysate, 1.0 percent of fructose, 2.0 percent of lactose and 1.0 percent of K by mass percentage2HPO41.0% of ammonium chloride, 2% of whey, 0.2% of yeast powder, 0.1% of vitamin C, 0.1% of formic acid and 0.1% of ethanol, wherein the pH value of the special culture medium is 7.
The preparation process of the combined hydrogen production preparation D can adopt the following steps: adding water, sequentially adding special microbial agent Enterobacter and special microbial agent Klebsiella, hydrogen production nutrient solution, zinc oxide, silicon dioxide and aluminum oxide, and stirring.
(3) The effects of the combined hydrogen production preparation D on the hydrogenation modification of the Xinjiang thick oil, the seepage capability improvement and the like are tested indoors.
Mixing the combined hydrogen production preparation D and the heavy oil in an intermediate container according to an oil-water ratio (7:3), removing air in the intermediate container in a nitrogen introducing mode, maintaining the pressure in the container as the oil reservoir pressure, placing the container at the oil reservoir temperature (60 ℃) for culturing for 30 days, recording the pressure change of the intermediate container in the culturing process, and taking a gas sample at regular time for chromatographic analysis.
After the culture, the intermediate container is opened, the liquid in the intermediate container is subjected to oil-water separation, and the obtained crude oil is compared with the change of components, viscosity, acid value, sulfur content, metal content and the like before and after the culture. The gas produced in the intermediate vessel was 35% hydrogen and 50% CO by gas chromatography2And other nitrogen gases. Through the analysis of the components of the thickened oil, the colloid and asphalt components in the thickened oil are obviously reduced before and after the cultivation, the relative content of saturated hydrocarbon and aromatic hydrocarbon is obviously increased, and the content of S-containing hydrocarbon and N-containing hydrocarbon is reduced; the acid value, sulfur content, C/H ratio, metal content, etc. were all decreased, as shown in Table 4. The viscosity of the crude oil (at 30 ℃) is reduced from 515 centipoise to 262 centipoise before culture, so that the physicochemical property of the crude oil is obviously changed after the in-situ microbial agent hydrogenation of the combined hydrogen production preparation D, the quality of the thick oil is improved, the viscosity is reduced, and the thick oil is beneficial to production and transportation.
TABLE 4 composition change of Xinjiang crude oil after culturing of the combined hydrogen production preparation D
Example 5
The nano-assisted biological hydrogenation thickened oil production increasing method comprises the following steps:
(1) and (3) analyzing the reservoir geological characteristics, the oil well production condition, reservoir minerals, formation water and heavy oil components and a heavy oil viscosity-temperature curve of a certain heavy oil block of the offshore oil field.
(2) According to the information in (1), the method optimizes the following combinations: the special microbial inoculum comprises, by mass, 18% of special microbial inoculum, 20% of hydrogen production nutrient solution, 0.03% of ferric chloride, 0.03% of ferric oxide, 0.03% of magnesium oxide, and the balance of water. The special microbial agent is prepared by fermenting Streptomyces and Chlorobi respectively (the mass ratio is 1: 1), and the special microbial agent and the Chlorobi are uniformly mixed according to the preparation method to obtain the combined hydrogen production preparation E.
Wherein the special microbial agent is prepared by fermenting Streptomyces microbial agent, and the culture medium for preparing the special microbial agent comprises lignocellulose hydrolysate and K2HPO4Yeast powder and calcium carbonate, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 108cfu/ml。
Wherein the special microbial agent is prepared by fermenting a Chlorobi microbial agent, and a culture medium used for the preparation comprises glucose and K2HPO4Yeast powder and calcium chloride, the microbial inoculum is a liquid preparation, and the effective concentration of the microbial inoculum reaches 108cfu/ml。
The hydrogen-producing nutrient solution comprises the following components: 20 percent of lignocellulose hydrolysate, 5 percent of glucose, 3 percent of lactose, 1 percent of rhamnose, 3 percent of arabinose and 1.0 percent of KH by mass percentage2PO41.0% of protein hydrolysate, 2% of whey, 0.2% of yeast powder, 0.1% of vitamin C, 0.1% of butyric acid and 0.1% of propanol, wherein the pH value of the special culture medium is 8.
The preparation process of the combined hydrogen production preparation E can adopt the following steps: adding water, sequentially adding special microorganism bacterium agent Streptomyces and special microorganism bacterium agent Chlorobi, hydrogen production nutrient solution, ferric chloride, ferric oxide and magnesium oxide, and stirring.
(3) The effect of the combined hydrogen production preparation E on the hydrogenation modification of the Xinjiang thick oil, the seepage capability improvement and the like is tested indoors.
Mixing the combined hydrogen production preparation E and the heavy oil in an intermediate container according to an oil-water ratio (7:3), removing air in the intermediate container in a nitrogen introducing mode, maintaining the pressure in the container as the oil reservoir pressure, placing the container at the oil reservoir temperature (67 ℃) for culturing for 18 days, recording the pressure change of the intermediate container in the culturing process, and periodically taking a gas sample for chromatographic analysis.
After the culture, the intermediate container is opened, the liquid in the intermediate container is subjected to oil-water separation, and the obtained crude oil is compared with the change of components, viscosity, acid value, sulfur content, metal content and the like before and after the culture. The gas produced in the intermediate vessel was 67% hydrogen and 22% CO by gas chromatography2And other nitrogen gases. Through analysis of the components of the thickened oil, the colloid and asphalt components in the thickened oil are obviously reduced before and after the cultivation, the relative content of saturated hydrocarbon and aromatic hydrocarbon is obviously increased, and the content of S-containing hydrocarbon and N-containing hydrocarbon is reduced; the acid value, sulfur content, C/H ratio, metal content, etc. were all decreased, as shown in Table 5. The viscosity of the crude oil (at 67 ℃) is reduced to 42 centipoises from 237 centipoises before culture, so that the physicochemical property of the crude oil is obviously changed after the in-situ microbial agent hydrogenation of the combined hydrogen production preparation E, the quality of the thick oil is improved, the viscosity is reduced, and the thick oil is beneficial to the extraction and transportation.
TABLE 5
Comparative example 1
This example is basically the same as example 1, as shown in table 6, except that:
the microbial agent is Pseudomonas aeruginosa.
TABLE 6 composition change of Jilin crude oil after combined hydrogen production preparation A culture
Comparative example 2
This example is basically the same as example 1, as shown in table 7, except that:
the hydrogen-producing nutrient solution comprises the following components: by mass percentage, 3 percent of glucose and 1.0 percent of KH2PO40.06% of urea, 0.01% of formic acid, 0.5% of yeast powder, 0.2% of vitamin C and the pH value of the special culture medium is 7.
TABLE 7 composition change of Jilin crude oil after combined hydrogen production preparation A culture
Comparative example 3
This embodiment is basically the same as embodiment 1 except that:
the hydrogen-producing nutrient solution comprises the following components: 4 percent of corn syrup, 3 percent of glucose and 1.0 percent of KH (KH)2PO40.06% of urea, 0.01% of formic acid, 0.2% of vitamin C, and the pH value of the special culture medium is 7.
TABLE 8 composition change of Jilin crude oil after culture of combined hydrogen production preparation A
Comparative example 4
This embodiment is basically the same as embodiment 1 except that:
the hydrogen-producing nutrient solution comprises the following components: 4 percent of corn syrup, 3 percent of glucose and 1.0 percent of KH (KH)2PO40.06% of urea and 0.5% ofYeast powder, 0.2% of vitamin C and the pH value of the special culture medium is 7.
TABLE 9 composition change of Jilin crude oil after combined hydrogen production preparation A culture
Comparative example 5
This embodiment is basically the same as embodiment 1 except that:
the hydrogen-producing nutrient solution comprises the following components: 4 percent of corn syrup, 3 percent of glucose and 1.0 percent of KH (KH)2PO40.01 percent of formic acid, 0.5 percent of yeast powder, 0.2 percent of vitamin C and the pH value of the special culture medium is 7.
TABLE 10 compositional changes of Jilin crude oil after culture of Combined Hydrogen production preparation A
Example 6
The effect of the permeation capability of the thick oil in the rock core before and after the preparation treatment of the combined hydrogen production preparation related to the examples 1-5 is evaluated.
Experimental apparatus: refer to the displacement experimental device shown in fig. 1
The experimental method comprises the following steps:
(1) filling the model with quartz sand in a certain ratio (160-180 mu m:200 mu m: 2: 3);
(2) the crude oil before and after treatment (dehydrated) was added to a sand pack.
(3) Connecting the sand filling pipe with a nitrogen-less cylinder, and opening the switch to maintain the pressure of 2 MPa. The time required for the crude oil to pass through sand layers of very similar permeability and height before and after treatment was compared and the same volume (10ml) was collected.
TABLE 11 test results
Through a 10 sand-filling pressure seepage experiment, the bio-hydrogen production preparation designed aiming at each oil reservoir characteristic and oil property has obvious effect, and the seepage capability of the thickened oil is obviously improved.
Example 7
The combined hydrogen production preparations related to the examples 1 to 5 were subjected to oil recovery effect evaluation.
Experimental apparatus: see the displacement experimental device shown in fig. 2
The experimental method comprises the following steps:
(1) filling a model with quartz sand in a certain ratio (160-180 mu m:200 mu m: 2:3), and measuring the permeability Kg under the condition of nitrogen at room temperature;
(2) vacuumizing saturated water by the model, converting the weight of the water saturated into the sintered rock core into the volume of a water phase according to the density of formation water, namely, obtaining a pore volume V pore, and calculating the porosity phi;
(3) measuring the permeability Kw with water;
(4) placing 3d of saturated oil at the pump speed of 0.2mL/min at the oil reservoir temperature, establishing bound water, calculating the original water saturation of Swr, and aging in an incubator for 3 d;
(5) driving water in the thermostat at the pump speed of 0.5mL/min until the water content is more than 98 percent and 0.5PV continuously;
(6) and injecting a 0.1PV combined hydrogen production preparation, and then performing subsequent water flooding on the basis of the preparation until the water content is limited.
(7) And recording the changes of oil production and water production of the model outlet at different moments, and calculating the change conditions of the water content at different moments. The test flow adopts a conventional physical model test flow.
TABLE 12 oil displacement indoor effect of biological hydrogen production preparation
As can be seen from 5 groups of sand-packed displacement experiments, the biological hydrogen-producing preparation designed aiming at the oil reservoir characteristics and the oil properties in the experimental method has obvious effect and obviously improves the recovery ratio of the thickened oil.
Example 8
Case of field test 1
And diluting the combined preparation A by 100 times by using injection water, wherein the injection amount is 186 square, slowly injecting the combined preparation A into a Jilin thick oil well, closing the well for 20 days, then re-opening the well, and measuring the daily yield of the thick oil. As can be seen from figure 3, after the well is opened, the daily production of the well is increased in a step mode, the daily production is increased to 2.3 tons/day from 1.1 tons/day before construction, the oil increase of a single well reaches 124 tons in 3 months, and the economic benefit is remarkable. And through the pressure detection of the oil well surface on site, the pressure is increased and maintained at 0.25Mpa from 0.05Mpa before construction; the gas component detection result shows that the produced gas contains oil-containing hydrogen, methane and carbon dioxide. The viscosity of crude oil in the produced liquid is reduced by 53.3 percent; and the acid value, the sulfur content, the C/H ratio, the metal content and the like are all reduced by 15-20 percent. On the whole, the design requirements of the combined preparation B are met from the viscosity of crude oil, gas components, the oil extraction effect and the like, and the biological extraction method is verified to be feasible in technology, remarkable in economic effect and has an industrial prospect.
Case of field test 2
And diluting the combined preparation B by 150 times by using injection water, wherein the injection amount is 150 square, slowly injecting the combined preparation B into a Liaohe thick oil well, closing the well for 15 days, then re-opening the well, and measuring the daily yield of the thick oil. As can be seen from figure 4, after the well is opened, the daily production of the well is increased in a step mode, the daily production of the well is increased to 1.4 tons/day from 0.9 tons/day before construction, the oil increase of a single well reaches 62 tons in 118 days, and the economic benefit is remarkable. And through the pressure detection of the on-site oil well surface, the pressure is increased and maintained at 0.10Mpa from 0.05Mpa before construction; the gas component detection result shows that the produced gas contains oil-containing hydrogen, methane and carbon dioxide. The viscosity of crude oil in the produced liquid is reduced by 30.1 percent; and the acid value, the sulfur content, the C/H ratio, the metal content and the like are all reduced to 8-12 percent. On the whole, the design requirements of the combined preparation A are met from the viscosity of crude oil, gas components, the oil extraction effect and the like, and the biological exploitation method is verified to be feasible in technology, remarkable in economic effect and has an industrial prospect.
Case of field test 3
And diluting the combined preparation C by 100 times by using injection water, wherein the injection amount is 270 square, slowly injecting the diluted combined preparation C into a Nanyang thick oil well, closing the well for 30 days, re-opening the well, and measuring the daily yield of the thick oil. As can be seen from figure 5, after the well is opened, the daily production of the well is increased in a step mode, the daily production of the well is increased to 3.8 tons/day from 0.1 ton/day before construction, the oil increase of a single well reaches 362 tons in 108 days, and the economic benefit is remarkable. And through the pressure detection of the on-site oil well surface, the pressure is increased and maintained at 0.29Mpa from 0.12Mpa before construction; the gas component detection result shows that the produced gas contains oil-containing hydrogen, methane, ethane, carbon dioxide, nitrogen and the like. The viscosity of crude oil in the produced liquid is reduced by 59.1 percent, and the freezing point is reduced by 7 ℃; and the acid value, the sulfur content, the C/H ratio, the metal content and the like are all reduced to 12-14 percent. On the whole, the design requirements of the combined preparation C are met from the viscosity of crude oil, gas components, the oil extraction effect and the like, and the biological exploitation method is verified to be feasible in technology, remarkable in economic effect and has an industrial prospect.
Case of field test 4
And diluting the combined preparation D by 100 times by using injection water, wherein the injection amount is 100 square, slowly injecting the diluted combined preparation D into a Nanyang thick oil well, closing the well for 20 days, re-opening the well, and measuring the daily yield of the thick oil. As can be seen from figure 6, after the well is opened, the daily production of the well is increased in a step mode, the daily production is increased to 3.5 tons/day at most from 0.3 tons/day before construction, the oil increase of a single well reaches 92 tons in 60 days, and the economic benefit is remarkable. And through the pressure detection of the on-site oil well surface, the pressure is increased and maintained at 0.10Mpa from 0.02Mpa before construction; the gas component detection result shows that the produced gas contains oil-containing hydrogen, carbon dioxide, nitrogen and the like. The viscosity of crude oil in the produced liquid is reduced by 29.1 percent, and the freezing point is reduced by 3 ℃; and the acid value, the sulfur content, the C/H ratio, the metal content and the like are all reduced to 6 to 8 percent. On the whole, the design requirements of the combined preparation D are met from the viscosity of crude oil, gas components, the oil extraction effect and the like, and the biological exploitation method is verified to be feasible in technology, remarkable in economic effect and has an industrial prospect.
Example 9
The invention designs a biological exploitation method applied to thick oil resource exploitation, which is characterized in that the method is a thick oil exploitation method mainly by synthesizing hydrogen in situ by microorganisms under the assistance of nano materials and utilizing the hydrogen to modify thick oil, aiming at different viscosities and different oil deposit conditions, microorganisms which synthesize the hydrogen under the anaerobic or facultative anaerobic condition grow, and the generated hydrogen performs hydrogenation modification on the thick oil in the oil deposit under the assistance of the nano materials, so that a series of physical and chemical properties of the thick oil are changed, such as acid value, heavy metal content, sulfur content, hydrocarbon ratio and the like are reduced, and the method has the functions of reducing resistance, reducing viscosity, reducing coagulation, improving thick oil seepage capability and quality and the like, thereby greatly improving the thick oil recovery efficiency.
The specific method comprises the following implementation steps:
(1) collecting and analyzing target oil reservoir block information, including geological features, oil reservoir conditions and development history, and selecting a medicament function aiming at development contradictions; collecting underground water, thick oil samples and stratum mineral samples, analyzing component information, and selecting biological agent composition.
(2) Preparing a microbial combined hydrogen production preparation, and culturing a corresponding microbial inoculum;
(3) optimally combining the step (2) according to the information in the step (1) to prepare an optimized biohydrogen production preparation aiming at the target block;
(4) optimizing field construction process parameters such as injection amount, injection concentration and the like through a physical simulation oil displacement experiment;
(5) and carrying out field implementation and effect tracking.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A nanometer auxiliary biological hydrogenation thickened oil production increasing method is characterized in that:
the method comprises the following steps:
(1) analyzing reservoir condition information of the heavy oil block;
(2) preparing a combined hydrogen production preparation and a nano material according to the oil reservoir condition information of the heavy oil block obtained in the step (1);
(3) and (3) injecting the combined hydrogen production preparation obtained in the step (2) and the nano material into an oil reservoir of the heavy oil block.
2. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 1, characterized in that:
the oil reservoir condition information of the heavy oil block in the step (1) is as follows:
reservoir geological characteristics, oil well production conditions, reservoir minerals, formation water and heavy oil components, and heavy oil viscosity-temperature curves.
3. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 1, characterized in that:
the combined hydrogen production preparation in the step (2) comprises 6-18% of microbial agent, 10-15% of hydrogen production nutrient solution, 0.031-0.14% of adjuvant and the balance of water by mass percentage;
the preparation method of the combined hydrogen production preparation comprises the following steps:
adding water, sequentially adding the microbial agent, the hydrogen-producing nutrient solution and the auxiliary agent, and fully stirring.
4. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 3, characterized in that:
the microbial agent is one or more of Citrobacter, Clostridium, Enterobacter, Cyanobacter, Klebsiella, Bacillus, Thermophiles, Synechococcus, Thermoanaerobacterium, Streptomyces and Chrobi;
the microbial agent is fermented to obtain a liquid microbial agent or a dry powder microbial agent.
5. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 3, characterized in that:
the hydrogen-producing nutrient solution comprises the following components in percentage by mass:
the pH value of the hydrogen-producing nutrient solution is 7.
6. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 1, characterized in that:
the nano material in the step (2) is one or more of silicon dioxide, aluminum oxide, titanium dioxide, zinc oxide, copper oxide, manganese oxide, graphene, ferrous chloride, ferric oxide and magnesium oxide.
7. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 5, characterized in that:
the monosaccharide or oligosaccharide is one or more of glucose, fructose, maltose, sucrose, lactose, rhamnose, arabinose, starch hydrolysate and lignocellulose hydrolysate.
8. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 1, characterized in that:
the nitrogen source is urea and NaNO3One or more of protein hydrolysate, ammonium chloride and whey.
9. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 1, characterized in that:
the small molecular acid is one or more of formic acid, acetic acid, propionic acid and butyric acid.
10. The nano-assisted biological hydrogenated heavy oil production increasing method according to claim 1, characterized in that:
the small molecular alcohol is one or more of methanol, ethanol, propanol and butanol.
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