72results about How to "Field test works well" patented technology

The invention discloses a microbial enhanced oil recovering method of a moderate-high permeability reservoir. The method particularly comprises the following steps of carrying out field sampling on a tested oil reservoir; analyzing function microorganisms in the oil reservoir and screening an endogenesis activator; screening exogenous function microorganisms; optimizing field injection process parameters; carrying out field implementation and effect tracking and evaluating. The microbial enhanced oil recovering method has the advantages of being wide in oil reservoir range and high in pertinence and operability. The endogenesis activator or the exogenous function microorganisms are selected according to the specific oil reservoir, field injection process parameters are optimized by utilizing physical simulation experiments, the field test effect is obvious, and the accuracy and practically of the process parameter optimizing result are improved by combination physical simulation and field tests, so that the field implementation effect of displacement of reservoir oil through the microorganisms is improved. Therefore, the microbial enhanced oil recovering method of the medium-high permeability oil reservoir can be widely applied to the field tests for enhancing the oil recovery of the medium-high permeability oil reservoir.

The invention relates to a temporary plugging agent for the acidization of the water injection well of a low permeability reservoir. The temporary plugging agent is prepared from stearate, borate and acrylate in a weight ratio of 3:1:6; 0.2wt% of polyacrylamide aqueous solution is used as the carrying fluid of the temporary plugging agent, the mass concentration of the temporary plugging agent is10%; the construction pressure is 1-2MPa higher than the water injection pressure, the low-pressure low speed injection is adopted; the injection speed is kept to 10-15m<3>/h; the temporary plugging agent can generate a filter cake with lower permeability near the wall of the well, thus effectively preventing the particles of the temporary plugging agent from intruding the deep part of the oil-gas reservoir; the temporary plugging agent has better compatibility with water, acidizing fluid, additive and the like under the formation condition; and when the shunting and turning functions of acidization are realized, the temporary plugging agent can be washed away fast and completely and the well which is not plugged temporarily can be recovered.

The invention discloses a microbial enhanced oil recovery method and belongs to the technical field of tertiary oil recovery. The method is characterized by comprising the following steps: 1, conducting displacement of reservoir oil through biosurfactant; 2, adjusting injection-production patterns; 3, conducting displacement of reservoir oil through indigenous microorganisms; 4, conducting oil recovery through microorganism single well huff-and-puff. According to the method, firstly, the biosurfactant is injected, so that the displacement efficiency of a water-driven oil reservoir is improved; then through adjustment of the injection-production patterns, the swept volume, in the oil reservoir, of the indigenous microorganisms is expanded; finally, through the microorganism single well huff-and-puff treatment, crude oil in the immediate vicinity of an oil well is displaced out, and thereby the purpose of further raising the recovery ratio of the oil reservoir is achieved finally. The method has the advantages that activator has the advantages of being wide in source, low in price and harmless to strata; the method is wide in oil reservoir application range and particularly suitable for an oil reservoir which is exploited in a water-driven mode and is medium and high in permeability; the process is simple, and the pertinence and operability are great; the field test effect is good, and the enhanced oil recovery rate is testified by field tests to be larger than 15.0%. Therefore, the method can be widely applied to the technical field of microbial enhanced oil recovery.

The invention belongs to the technical field of microorganism oil production and particularly relates to an indigenous microorganism single well huff-puff oil production method. The indigenous microorganism single well huff-puff oil production method comprises the following steps of test oil well screening, a hydrocarbon oxidizing functional bacteria activation huff-puff test, a crude oil emulsification functional bacteria activation huff-puff test, a gas producing functional bacteria activation huff-puff test, a field test and testing effect evaluation. According to the indigenous microorganism single well huff-puff oil production method, hydrocarbon oxidizing functional bacteria, crude oil emulsification functional bacteria and gas producing functional bacteria in an activation test oil well are utilized, and the purpose of effectively increasing the oil well yield is achieved through the comprehensive effect of metabolic products of the bacteria. The indigenous microorganism single well huff-puff oil production method has the characteristics of being simple in process, high in pertinence and operability and good in field test effect; the effective period is longer than 24 months; the single well average daily incremental oil is greater than 3t; and the input-output ratio is greater than 1:4.5. Therefore, the indigenous microorganism single well huff-puff oil production method can be widely used in field tests for increasing the oil well yield.

The invention belongs to the technical field of tertiary oil production, and particularly relates to a heavy oil well single-well throughput oil production method. The method concretely comprises the following steps of test oil well screening, single-well throughput process selection, and field test. The single-well throughput process is selected by aiming at the characteristics of a heavy oil well; and the oil-water mobility ratio is well reduced, so that the single-well yield of the heavy oil well can be effectively improved. Meanwhile, the heavy oil well single-well throughput oil production method has the characteristics of simple process, high operability and long validity period. Therefore the method can be widely applied to the field test for improving the single-well yield of the heavy oil well.

The invention discloses a method for improving the steam stimulation effect of a microorganism single well and belongs to the technical field of microorganism oil recovery. The method for improving the steam stimulation effect of the microorganism single well is characterized in that the method comprises the following steps that 1, a test oil well is selected; 2, the oxygen demand of functional microorganisms is determined; 3, the functional microorganisms, activating agents and oxygen are injected in the site; 4, follow-up air is injected in the site; 5, the test oil well is shut down; and 6, the test oil well is started up for production. According to the method for improving the steam stimulation effect of the microorganism single well, not only is aerobic microorganisms in the immediate vicinity of the oil well activated through the injected oxygen, but also growth and metabolism of the functional microorganisms are activated; meanwhile, the impact scope of the functional microorganisms is expanded in a follow-up air mode, and the site test effect is further improved. The method for improving the steam stimulation effect of the microorganism single well has the characteristics that the method is wide in application range and suitable for both a thickened oil well and a wax-bearing oil well, high in pertinence and operability and long in validity period; the field conducted process is simple, the site test effect is obvious, and safety and environmental protection are achieved; therefore, the method can be widely applied to site testing of microorganism single well huff and puff.

The invention discloses a method for enhancing the recovery efficiency of an oil reservoir driven by stratal microorganisms, and belongs to the technical field of microorganism oil recovery. The method specifically comprises the following steps of screening of the experimental oil reservoir; an activation phase of hydrocarbon-oxidizing functional bacteria; an activation phase of crude-oil-emulsifying functional bacteria; an activation phase of gas-producing functional bacteria; and an evaluation phase of a field experimental effect. According to the method for enhancing the recovery efficiency of the oil reservoir driven by the stratal microorganisms, activation agents adopted by the method are wide in sources and low in price and do not damage stratums; the method has the characteristics that the technology is simple, the pertinence and the maneuverability are high, and the field experimental effect is good; and the recovery efficiency is enhanced by more than 15.0% by a field experiment, so the method can be widely applied to field experiments enhancing the recovery efficiency of oil reservoirs.

The invention belongs to the technical field of oilfield chemistry, and particularly relates to a microbial paraffin removing and preventing method for a high wax content oil well. The microbial paraffin removing and preventing method comprises the following steps that screening of a test oil well is conducted; optimization of microbial paraffin removing and preventing bacteria is conducted; the dilution capacity of the microbial paraffin removing and preventing bacteria is evaluated; field dosage is determined; the dosing timing is determined; and the field test and the effect are evaluated. According to the microbial paraffin removing and preventing method for the high wax content oil well, scientific basis is provided for determination of the bacteria adding amount and the bacteria adding timing of the test oil well; and meanwhile the method has the characteristics that the application range of an oil deposit is wide, the technology is simple, the operability is high, and the field testing effect is good, the hot washing period is effectively prolonged by over 200 d, and over five times of well hot washing of a single well are saved every year. In this way, the method can be widely applied to paraffin removing and preventing operation for the high wax content oil well.

The invention belongs to the technical field of microbial oil exploiting, and particularly relates to a microbial single well huff and puff oil exploiting method of a low-yield inefficient oil well. The microbial single well huff and puff oil exploiting method of low-yield inefficient oil well comprises the following steps of screening of a trial oil well; acidizing and block removing of the trial oil well, and deeply blocking adjusting of the trial oil well; improving of oil washing efficiency of the trial oil well; and evaluating of the field trial effect. The microbial single well huff and puff oil exploiting method of low-yield inefficient oil well has the characteristics of being simple in technology, high in pertinence and operability, and excellent in field trial effect, the term of validity is more than 30 months, average daily incremental oil of the single well is larger than 3.5 t, and the input-output ratio is larger than 1:5. Therefore, the microbial single well huff and puff oil exploiting method of the low-yield inefficient oil well can be extensively applied to the field trial of improving the oil well yield of the low-yield inefficient oil well.

The invention belongs to the technical field of tertiary oil recovery, and specifically relates to a method for microbial single well treatment of heavy oil wells. The method specifically includes the following steps: screening of heavy oil wells; single well huff and puff treatment of heavy oil wells; Evaluation. According to the characteristics of heavy oil wells, the present invention selects the comprehensive process of huff and puff and wellbore treatment, which can significantly reduce the oil-water mobility ratio in the oil layer of heavy oil wells and significantly improve the flow performance of wellbore crude oil, thereby greatly increasing the production of heavy oil wells; at the same time, the invention It has the characteristics of simple process, strong operability, long validity period and high input-output ratio. Therefore, the present invention can be widely applied in the field test of increasing single well production of heavy oil wells.

The invention relates to a biological wetting reversal agent, and concretely relates to a biological wetting reversal agent for a high-temperature high-salt heavy oil reservoir, and a preparation method thereof. The reversal agent comprises 20-30 wt% of a rhamnolipid fermentation liquor, 15-20 wt% of a sophorolipid fermentation liquor, 3-5 wt% of alkyl polyglycoside, 0.1-0.3 wt% of an alcohol assistant, and the balance of water. The rhamnolipid fermentation liquor is a Pseudomonas aeruginosa fermentation liquor with the concentration of above 35 g/L; the sophorolipid fermentation liquor is a yeast fermentation liquor with the concentration of above 100 g/L; the alkyl polyglycoside is a biological anionic and nonionic surfactant, and the relative molecular weight is 290-370; and the alcoholassistant is one of butanol, pentanol and hexanol. The biological wetting reversal agent has the advantages of wide oil reservoir application range, simple construction process and good field test effect, has a validity period of above 24 months, and allows the daily oil increase of a single well to be more than 10 t and the input-output ratio to be larger than 1:10.

The invention belongs to the technical field of microbial enhanced oil recovery, and particularly relates to a method for regulating and controlling a growth metabolic rule of indigenous microorganisms of an oil pool. The method specifically comprises the following steps of sampling of the test oil pool; determining of the growth metabolic rule of the indigenous microorganisms of the oil pool; determining of a process for increasing cell concentration of a delay period; determining of a process for prolonging the cycle of a stable period; determining of a final regulation and control scheme; and field testing. The method has the advantages that the regulation and control idea is clear, the processes are simple, and the pertinence and the operability are strong; and meanwhile, the method has the advantages that the field test effect is good, and the input-output ratio is high, in the case of the field test, the recovery ratio is increased by greater than 18.0%, and the input-output ratio is greater than 1:12, and therefore, the method can be widely applied to the microbial enhanced oil recovery field test.

The invention belongs to the technical field of oil-containing solid waste treatment technologies and oil production engineering, and particularly relates to a method for harmless treatment of oil sludge sand. The method includes the following steps: (1) screening of the oil sludge sand; (2) screening of an activator; (3) determination of reaction conditions; (4) an anaerobic reaction and methanegas collection; (5) screening of an abandoned oil reservoir; and (6) injection of the oil sludge sand subjected to the anaerobic reaction into the abandoned oil reservoir. Compared with conventional oil sludge sand treatment, the method has the advantage of recovering energy methane gas, and meanwhile, the treated oil sludge sand is injected into the reservoir, so that environmental pollution caused by external discharging is avoided, and the treatment cost of the oil sludge sand is greatly lowered; and meanwhile, the abandoned reservoir treated by the method has the advantages of long effective period, high input-output ratio and good field test effect, the effective period is more than three years, the recovery ratio is increased by 10% or above, the methane gas yield reaches 5.0*10<7> m3 or above, and the input-output ratio reaches 1:12 or above.

The invention belongs to the technical field of tertiary oil recovery, and in particular relates to a method of improving recovery rate of an oil deposit by indigenous microbial combination flooding.The method comprises the specific steps of screening a test oil deposit; carrying out oil-water separation on an output liquid of the test oil deposit; pre-treating formation water; preparing an activator; injecting the activator on-site; and evaluating an on-site test effect. The metabolism velocity and activity of the indigenous microorganisms are improved by a physical action of impulse waves,crude oil degradation of hydrocarbon oxidation bacteria is accelerated, aerogenesis of methanogens is promoted, and a producing biogenic surfactant for producing biogenic surfactant bacteria is promoted, so that in situ degradation and viscosity reduction of crude oil in a formation and plug removal of the formation are realized. Therefore, the recovery rate of the crude of the test oil deposit isimproved greatly. Thus, the method can be widely applied to a production increasing process of the oil deposit.

The invention belongs to the technical field of petroleum extraction, and particularly relates to a biological enzyme composite preparation for petroleum extraction as well as a preparation method andapplication of the composite preparation. The composite preparation comprises the following components, in percentages by mass: 1-2% of a functional microbial fermentation liquid, 5-10% of a nutritional agent, 0.5-1.0% of a biological enzyme, and the rest is water, wherein the functional microbial fermentation liquid is a fermentation liquid of thermotoga or geobacillus thermodenitrificans; the nutritional agent is composed of a nitrogen source and a phosphorus source, the nitrogen source is one of ammonium chloride, urea and sodium nitrate, and the phosphorus source is one of dipotassium hydrogen phosphate, disodium hydrogen phosphate and diammonium hydrogen phosphate; and the biological enzyme is composed of acetylxylan esterases and alkylsuccinate synthase. The composite preparation has the characteristics of a simple construction technology, high operability and a good field test effect, the effective period of an oil well is more than 50 months, the average daily oil increase ofa single well is more than 10 tons, and the input-output ratio is greater than 1:10.

The invention belongs to the technical field of microbial oil displacement, and particularly relates to a directional adjustment and control method for oil reservoir endogenous functional microbes. The method specifically comprises the following steps of screening a test oil reservoir, separating and amplifying sulfate reducing bacteria phages, screening the sulfate reducing bacteria phages, screening a directional adjustment and control activator system, evaluating oil displacement performance of the directional adjustment and control activator system, performing a field test and performing effect evaluation. The method disclosed by the invention has the advantages of being reasonable, simple in process, simple to operate, safe and reliable, less in investment, low in cost and good in field test effect, reduces the cost by 30% or more, and improves the recovery efficiency by 20% or more according to the field test.

The invention belongs to the technical field of microbial oil recovery, and particularly relates to a process for injecting endogenous microbial oil displacement activating agents on sites. The process for injecting the activating agents on the sites particularly includes steps of carrying out phases for injecting inorganic nutrition activating agents on the sites; carrying out phases for injecting organic nutrition activating agents on the sites; carrying out circulation injection phases. The process has the advantages that the process is high in operability, pertinence and reliability, includes simple site injection procedures and is low in site test investment cost, and the cost can be reduced by 30% at least as compared with existing processes; good site test effects can be realized, the process is high in input-output ratio, the recovery ratio is increased by more than 15% in site tests, the input-output ratio is higher than 1:5, and accordingly the process can be widely applied to endogenous microbial oil displacement site tests.

The invention belongs to the technical field of oilfield development, and particularly relates to a microbial paraffin removal and inhibition method for a paraffin-containing oil well. The method specifically comprises the following steps of screening a test oil well; determining temperature ranges of low-temperature, medium-temperature and high-temperature strains; screening the low-temperature,medium-temperature and high-temperature strains; determining the compounding performance of the low-temperature, medium-temperature and high-temperature strains; determining the on-site adding proportion, the on-site total adding amount and the on-site adding period of compounding strains; and performing field testing and effect evaluation. The microbial paraffin removal and inhibition method hasthe advantages of being simple in process, high in operability and good in field test effect, the thermal washing period is effectively prolonged by 200 d or above, the thermal washing times of one single well are averagely saved by 5 times or above every year, and the input-output ratio is larger than 1:5. Therefore, the method can be widely applied to paraffin removal and inhibition operation ofthe high-paraffin-content oil well.

The invention belongs to the technical field of petroleum exploitation, and particularly relates to a method for improving oil reservoir adaptability of exogenous functional microorganisms. The methodspecifically comprises the following steps that preliminary screening of the exogenous functional microorganisms is conducted, specifically, the exogenous functional microorganisms are preliminarilyscreened according to oil reservoir conditions of a testing oil reservoir; acclimation of the exogenous functional microorganisms is conducted, and acclimation comprises four respects of oil reservoirtemperature acclimation, oil reservoir mineralization acclimation, oil reservoir anaerobic condition acclimation and oil reservoir pressure acclimation; oil reservoir adaptability evaluation of the exogenous functional microorganisms after being subjected to acclimation is conducted, specifically, a physical simulation oil displacement experiment is conducted under the oil reservoir condition ofsimulating a test oil reservoir, the oil reservoir adaptability of the exogenous functional microorganisms after being subjected to acclimation is evaluated, and the exogenous functional microorganisms are screened for a field test; and the field test is conducted, and evaluation on the field test effect is conducted after the test is finished. The method for improving the oil reservoir adaptability of the exogenous functional microorganisms has the characteristics that the method is simple, maneuverability and pertinence are high, the cost is low, the oil reservoir adaptability of the exogenous functional microorganisms after being subjected to acclimation is high, and the field test effect is good, and enhanced oil recovery of the field test is greater than 10%.

The invention belongs to the technical field of microbial oil recovery, and particularly relates to an endogenous microbial single-well throughput oil recovery method. The method comprises the following steps of screening a test oil well; screening an activator; determining the injection amount of the activator; determining well closing time; and carrying out field test and evaluating test results. The pertinence is strong, and screening of endogenous activators is respectively carried out for different oil layer temperatures, so that the screened activator formula can effectively activate theendogenous microorganisms in different oil layers of the test oil well; and meanwhile, the method has the characteristics of simple operation, strong operability and good field test effect, the effective period of the oil well is more than 24 months, the water content is reduced by 10 percent points or more, the average daily oil increase of a single well is more than 10t, and the input-output ratio is more than 1:8. Therefore, the method can be widely applied to field tests for improving oil well output.

The invention discloses a method for controlling the corrosion of an acidic produced liquid of an oil field and belongs to the technical field of oil field sludge treatment and corrosion control. Themethod specifically comprises the following steps: analyzing the water quality of the produced liquid; screening the produced liquid; screening desulfurization and corrosion inhibition functional bacteria; determining a modifier; determining a dirt dispersion agent; determining an on-site implementation process; and carrying out on-site implementation and effect evaluation. By combining a biological desulfurization process with a modified process, the corrosion rate of the produced liquid is reduced effectively and the maintenance free period of the oil field is prolonged effectively. The corrosion rate of the produced liquid reaches over 80%, and the maintenance free period of the oil field is prolonged by over 50%. Moreover, the method has the characteristics of being simple in implementation process, high in pertinence and operability and good in on-site test effect, so that the method can be widely applied to treatment of the acidic produced liquid of the oil field.