CN114776264B - Solid phase control method in natural gas hydrate exploitation process - Google Patents
Solid phase control method in natural gas hydrate exploitation process Download PDFInfo
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- 239000007790 solid phase Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 48
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 62
- 239000002245 particle Substances 0.000 claims abstract description 60
- 238000011217 control strategy Methods 0.000 claims abstract description 15
- 238000002474 experimental method Methods 0.000 claims abstract description 12
- 150000004677 hydrates Chemical class 0.000 claims abstract description 8
- 238000005065 mining Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000009288 screen filtration Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims 1
- 238000012216 screening Methods 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 21
- 238000005243 fluidization Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 230000005641 tunneling Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a solid phase control method in a natural gas hydrate exploitation process, which comprises the following steps: acquiring reservoir data, calculating the median of particle sizes of hydrates and muddy sand of different reservoir solid phases, and determining the comprehensive particle size of each reservoir solid phase by taking the volume proportion of the hydrates and the volume proportion of the muddy sand in each reservoir solid phase as the weight of the median of particle sizes; determining the precision range of solid-phase control strategies corresponding to different mining methods according to the comprehensive granularity; determining a control flow rate range of the well bore according to the temperature, the pressure range and the sand carrying critical speed range of the well bore in the hydrate secondary generation; and screening the optimal solid-phase control precision range and the optimal control flow rate range from the control precision range and the control flow rate range according to the requirements between the sand yield and the productivity through experiments. The beneficial effects of the invention are as follows: the problems of sand blockage caused by flow velocity reduction in sand control, ice blockage caused by secondary generation of combustible ice, solid phase co-blockage and the like are avoided.
Description
Technical Field
The invention relates to the technical field of natural gas hydrate exploitation, in particular to a solid phase control method in a natural gas hydrate exploitation process.
Background
The natural gas hydrate is an ice-like substance formed by natural gas and water under the conditions of low temperature and high pressure, commonly known as 'combustible ice', is widely distributed in deep sea sediments or land frozen soil, and has rich gas and fresh water reserves. However, most natural gas hydrate reservoirs are deep water shallow layers, non-diagenetic and weakly cemented argillaceous silt reservoirs, and engineering and geological risks such as sand production, well wall instability, submarine landslide and the like are easy to occur in the exploitation process.
However, the test production of the natural gas hydrate in the frozen soil area and the sea area is mostly limited by sand production, especially the sea hydrate in China is mostly endowed in a muddy powder sand reservoir layer which is frequently in a three-shallow disaster and is not consolidated, weakly consolidated or developed in cracks, the sand production phenomenon is difficult to avoid in the process of exploiting the hydrate, sand production can lead to secondary generation of the well bore hydrate, and solid phase blockage is easily caused by the sand production phenomenon and the well bore sand carrying together, so that the influence of solid phases such as sand production/well bore sand carrying/secondary hydrate generation and the like in the process of exploiting the natural gas hydrate needs to be considered, and the corresponding solid phase control method is adopted, so that the efficient and safe development of the hydrate can be ensured.
Disclosure of Invention
Aiming at the problems, the invention provides a solid phase control method in the natural gas hydrate exploitation process, which mainly solves the problem of solid phase blockage caused by the fact that the exploitation of sand and sand control can lead to the massive secondary generation of a shaft hydrate and the reduction of the sand carrying of the shaft.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a solid phase control method in a natural gas hydrate exploitation process, comprising the following steps:
acquiring reservoir data, calculating the median particle size of hydrates and muddy sand of different reservoir solid phases, and determining the comprehensive particle size of each reservoir solid phase by taking the volume proportion of the hydrates and the volume proportion of the muddy sand in each reservoir solid phase as the weight of the median particle size;
determining the precision range of solid-phase control strategies corresponding to different mining methods according to the comprehensive granularity;
determining a control flow rate range of the shaft according to the hydrate secondary generation temperature, the pressure range and the sand carrying critical speed range in the shaft;
and screening an optimal solid-phase control precision range and an optimal control flow rate range from the precision range and the control flow rate range according to the requirements between the sand yield and the productivity through experiments.
In some embodiments, the reservoir data is acquired by exploration data and a dwell core.
In some embodiments, the reservoir data includes a silt particle size, a hydrate saturation, and a formation porosity, and the hydrate volume fraction and the silt volume fraction are calculated from the hydrate saturation and formation porosity.
In some embodiments, the method of calculating the integrated granularity is
Wherein d g50 Is the weighted solid phase particle size median value, d h50 Is the median particle size of the hydrate, d s50 Is the median particle size of the silt, S h S as a proportion of hydrate in reservoir volume s Is the proportion of silt in the reservoir volume.
In some embodiments, the solid phase control strategy comprises a first stage control that is a gravel filtration having a median particle size accuracy in the range of 5-6 times the integrated particle size and a second stage control that is a screen filtration having a pore size accuracy in the range of 1-1.1 times the integrated particle size.
In some embodiments, the hydrate secondary generation temperature, the pressure range and the sand carrying critical speed range in the shaft are input into a multi-field coupling model of the shaft temperature field-flow field-force field-phase change field, constraint conditions are set, and the control flow speed range is obtained through solving.
In some embodiments, the tool within the precision range is mounted on experimental equipment, a fluid solid-phase control experiment is carried out according to the precision range and the control flow rate range, a function between the sand yield and the productivity is obtained according to experimental results, and the optimal solid-phase control precision and the optimal control flow rate are screened according to the function.
In some embodiments, the fluid solid phase control assay comprises: the gas-liquid fluid of different states of pressure, temperature and flow rate is passed through a simulated reservoir and a tool of specific precision.
The beneficial effects of the invention are as follows: the method mainly comprises the steps of setting solid-phase control strategies of different levels by taking the comprehensive granularity of different reservoirs into consideration, screening optimal solid-phase control precision and optimal control flow rate according to the relation between sand yield and productivity, and effectively avoiding the problems of sand blockage caused by flow rate reduction in sand control, ice blockage caused by secondary generation of combustible ice, solid-phase co-blockage and the like.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling a solid phase in a natural gas hydrate exploitation process according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a solid phase control scheme under different scenarios according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present invention more clear and distinct. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings.
The embodiment provides a solid-phase control method in the natural gas hydrate exploitation process, mainly by considering the comprehensive granularity of different reservoirs, setting solid-phase control strategies of different levels based on the comprehensive granularity, and screening optimal solid-phase control precision and optimal control flow rate according to the relation between sand yield and productivity, the problems of sand blockage caused by flow rate reduction in sand control, ice blockage caused by secondary generation of combustible ice, solid-phase co-blockage and the like can be effectively avoided.
As shown in fig. 1, the method comprises the following steps:
s1, acquiring reservoir layers, calculating the median of particle sizes of hydrates and muddy sand of different reservoir solid phases, and determining the comprehensive particle size of each reservoir solid phase by taking the volume proportion of the hydrates and the volume proportion of the muddy sand in each reservoir solid phase as the weight of the median of particle sizes.
In this embodiment, the reservoir data is acquired from the survey data and the pressurize core. The reservoir data comprises a silt particle size, a hydrate saturation degree and a formation porosity, and the volume proportion of the hydrate and the volume proportion of the silt are calculated according to the hydrate saturation degree and the formation porosity.
The calculation method of the comprehensive granularity comprises the following steps of
Wherein d g50 Is the weighted solid phase particle size median value, d h50 Is the median particle size of the hydrate, d s50 Is the median particle size of the silt, S h S as a proportion of hydrate in reservoir volume s Is the proportion of silt in the reservoir volume.
S2, determining the precision range of the solid-phase control strategy corresponding to different mining methods according to the comprehensive granularity.
In the hydrate exploitation process, the median value of the particle size of the solid phase particles of the reservoir is not changed greatly, and the particle size of the residual sand is increased although the particle size of the hydrate is reduced. Therefore, in this embodiment, the solid phase control strategy includes at least a first stage control and a second stage control, the first stage control is gravel filtration, the median precision range of the particle size of the gravel is 5-6 times of the comprehensive particle size, the second stage control is screen filtration, and the aperture precision of the screen is 1-1.1 times of the comprehensive particle size.
S3, determining a control flow rate range of the shaft according to the hydrate secondary generation temperature, the pressure range and the sand carrying critical speed range in the shaft.
In the embodiment, hydrate secondary generation temperature, a pressure range and a sand carrying critical speed range in a shaft are input into a multi-field coupling model of a shaft temperature field-a flow field-a force field-a phase change field, constraint conditions are set, and a control flow speed range is obtained through solving.
And S4, screening an optimal solid-phase control precision range and an optimal control flow rate range from the precision range and the control flow rate range according to the requirements between the sand yield and the productivity through experiments.
In this embodiment, the tool within the precision range is mounted to an experimental device, a fluid-solid phase control experiment is performed according to the precision range and the control flow rate range, a function between the sand yield and the productivity is obtained according to the experimental result, and the optimal solid phase control precision and the optimal control flow rate are screened according to the function. The fluid solid phase control experiment comprises: the gas-liquid fluid of different states of pressure, temperature and flow rate is passed through a simulated reservoir and a tool of specific precision.
Aiming at a natural gas hydrate reservoir multi-level, various exploitation modes, a plurality of production stages and consideration of the median value of the particle size of the reservoir solid phase particles and the principle of layering, grading and multistage sand prevention: the design of different solid phase control precision (grading) is carried out by adopting the median characteristics of solid phase particle diameters of each layer (layering) in different production stages (grading), and multistage solid phase control (grading) is realized by adopting a compound sand control mode of combining gravel, screen sand control and the like for a reservoir with high argillaceous content.
Based on the development and grading of the natural gas hydrate, the large-particle hydrate is proposed to have a sand blocking effect on muddy silt by considering different particle sizes, so that the sand prevention design precision is influenced, a solid-phase control strategy considering hydrate particles and the decomposition effect of the hydrate particles is provided, and finally, a solid-phase control method integrating sand production/sand prevention/shaft sand carrying/secondary generation prevention is formed, so that a reference is provided for safe and efficient commercial development of the natural gas hydrate in south China sea.
On the basis of the above method for controlling the solid phase in the process of exploiting natural gas hydrate, the following description is given by three different cases, as shown in fig. 2:
(1) Control strategy for hydrate exploitation based on conventional oil and gas technology
First stage of production: by means of the Sauci method, according to the median dg of granularity of stratum solid phase particles (comprising silt and hydrate) 50 And (5) performing primary screening. Under the condition of stable well wall, the method comprises the steps of 'preventing thickness and fineness', determining the precision range of first-stage control, and outputting partial small-particle solid phase (small-particle hydrate and mud) as much as possible in the first stage to prevent partial large-particle solid phase (large-particle hydrate and sand); for the reservoir with high mud content, based on the control mode, a Geoform sand prevention mode and Tausch mode are adopted&The accuracy range is determined by the Corley method, the Karpoff method, reservoir reconstruction and other technologies.
Second stage of production: d with decomposition of the hydrate g50 The weight of the middle hydrate is reduced, and the larger solid phase particles prevented in the stratum are the solid phase control main body (mainly comprising silt) at the stage, so that the accuracy range of the second-stage control of the pipe control accuracy is determined by combining the silt particle size obtained by a reservoir exploratory well; for reservoirs with high shale content, in spite of the first level of control measures, it is still necessary to consider that the second level of measures is used for remediation after failure of the first level of control. At this time, the water content of the reservoir is lower than that of the first production stage, the weight of the solid phase hydrate is reduced, but the gas flow rate is higher, so that the pipe sand prevention mode of the high-yield gas well can be considered, and the control can be carried out under the cooperation of mud cakes.
Third stage of production: due to d g50 The weight of the hydrate in the well is further reduced, and an unstable reservoir or a mud cake which is decomposed by the hydrate near the well wall needs to be prevented from being integrally pushed by far-end gas-liquid to slide out of sand, so that the effect of the first two-stage control measures is relied on, and the third-stage control measure after the first two-stage control is failed needs to be considered. At this stage, the integral slippage of the reservoir after the near-wall hydrate is decomposed is controlled.
S1: the median particle size of the sediment of the south sea hydrate reservoir is between 6 and 40 mu m, the average stratum porosity is between 30 and 46 percent (40 percent), and the average hydrate saturation is between 40 and 46.2 percent (43 percent). Because ofThe hydrate accounts for 17.2% of the reservoir, the silt accounts for 60%, and the pores account for 22.8%. The average particle size of the hydrate was 200. Mu.m. The median particle size of the solid phase of the reservoir is the average particle size weighted by the median particle size and the solid phase of the reservoir is calculated 50 Controlling the median value Dg of the gravel granularity of the solid phase to be 38-58.4 mu m 50 5 to 6 times dg 50 I.e., 190-350.4 μm, about 42-80 mesh, the high quality screen may take 60 μm as a control range by comparison, and the slotted liner may not be suitable. Thus, the first stage control can use gravel with a median particle size of 190-350.4 μm, and the second stage control range of the high-quality screen can use 60 μm as the control range.
S2, determining the flow velocity in critical sand carrying of the shaft and the flow velocity outside the secondary generation range of the hydrate through a multi-field coupling model of the hydrate shaft.
And S3, selecting an industrial common precision control tool to put into experimental equipment for carrying out a fluid solid phase control experiment to obtain the relation between the solid phase output and the capacity, thereby obtaining the required optimal solid phase control precision.
(2) Control strategy for solid state fluidization
S1, mechanically controlling the hydrate exploitation by a solid-state fluidization method through pipes, wherein crushed solid-phase particles in fluidized liquid are required to be controlled, so that blockage caused by suction of uncrushed large-particle solid phase and adhesion blockage of fine-particle solid phase are avoided. The solid phase grain diameter after tunneling and crushing is obtained, multistage control design is carried out in the fluidization tube, control of sand turning and sand discharging separation can be realized, and the precision of a solid phase control strategy is determined. .
S2, determining the flow velocity in critical sand carrying of the fluidization pipeline and the flow velocity outside the hydrate secondary generation range through a multi-field coupling model of the hydrate shaft (fluidization pipeline), and determining the fluid flow velocity range.
And S3, selecting an industrial common precision control tool to put into experimental equipment for carrying out a fluid solid phase control experiment on the obtained solid phase control and fluid flow velocity range to obtain the relation among solid phase output, turnover volume and productivity, thereby obtaining the required optimal solid phase control precision. (3) Solid-phase control strategy for three-gas combined mining
"three gas production" (hydrate, shallow gas, conventional gas) may be an effective way to realize commercial exploitation in early stages, and sand control and solid phase control are performed on the gas production of the layered gas. And aiming at the (1) conventional gas field accompanied by hydrate reservoirs, the conventional gas field sand control method is adopted to control the gas field, and if the hydrate reservoirs are required to be exploited, the (1) method is adopted to control. (2) The concrete control method of the shallow gas (free gas) associated hydrate reservoir needs to control the solid phase granularity of the reservoirs of the shallow gas and the hydrate or to carry out the design of grading and layering by considering the condition of balanced drainage of a shaft. S1, acquiring the median granularity of reservoir solid phases of all reservoirs according to reservoir exploration results of multi-layer gas (hydrate, shallow gas and conventional gas), and determining the accuracy of a solid phase control strategy.
S2, determining the fluid flow velocity range according to the flow velocity in different shafts (a hydrate shaft, a shallow gas shaft and a conventional gas shaft) and the critical sand carrying flow velocity in a fluidization pipeline and the flow velocity outside the hydrate secondary generation range.
And S3, selecting an industrial common precision control tool to put into experimental equipment for carrying out a fluid solid phase control experiment on the obtained solid phase control and fluid flow velocity range to obtain the relation between the solid phase output and the capacity, thereby obtaining the required optimal solid phase control precision.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The solid phase control method in the natural gas hydrate exploitation process is characterized by comprising the following steps of:
acquiring reservoir data, calculating the median particle size of hydrates and muddy sand of different reservoir solid phases, and determining the comprehensive particle size of each reservoir solid phase by taking the volume proportion of the hydrates and the volume proportion of the muddy sand in each reservoir solid phase as the weight of the median particle size;
determining the precision range of solid-phase control strategies corresponding to different mining methods according to the comprehensive granularity;
determining a control flow rate range of the shaft according to the hydrate secondary generation temperature, the pressure range and the sand carrying critical speed range in the shaft;
according to the requirements between the sand yield and the productivity, an optimal solid-phase control precision range and an optimal control flow rate range are screened out from the precision range and the control flow rate range through experiments;
acquiring the reservoir data through exploration data and a pressure maintaining rock core;
the reservoir data comprises a silt particle size, a hydrate saturation and a formation porosity, and the hydrate volume proportion and the silt volume proportion are calculated according to the hydrate saturation and the formation porosity.
2. The method for controlling solid phase in natural gas hydrate exploitation according to claim 1, wherein the calculation method of the comprehensive particle size is that
Wherein d g50 Is the weighted solid phase particle size median value, d h50 Is the median particle size of the hydrate, d s50 Is the median particle size of the silt, S h S as a proportion of hydrate in reservoir volume s Is the proportion of silt in the reservoir volume.
3. The method of solid phase control in a natural gas hydrate production process of claim 1, wherein the solid phase control strategy comprises a first stage control and a second stage control, the first stage control being a gravel filtration, the median particle size accuracy of the gravel ranging from 5 to 6 times the integrated particle size, the second stage control being a screen filtration, the screen pore size accuracy ranging from 1 to 1.1 times the integrated particle size.
4. The method for controlling solid phase in the process of exploiting natural gas hydrate according to claim 1, wherein hydrate secondary generation temperature, pressure range and sand carrying critical speed range in a shaft are input into a multi-field coupling model of a shaft temperature field-flow field-force field-phase change field, constraint conditions are set, and the control flow speed range is obtained by solving.
5. The method for controlling solid phase in a natural gas hydrate exploitation process according to claim 1, wherein a tool within the precision range is mounted on an experimental device, a fluid solid phase control experiment is carried out according to the precision range and the control flow rate range, a function between the sand yield and the productivity is obtained according to experimental results, and the optimal solid phase control precision and the optimal control flow rate are screened according to the function.
6. The method of solid phase control in a natural gas hydrate production process of claim 5, wherein the fluid solid phase control experiment comprises: the gas-liquid fluid of different states of pressure, temperature and flow rate is passed through a simulated reservoir and a tool of specific precision.
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| Title |
|---|
| 海域天然气水合物泥质粉砂型储层防砂砾石粒径尺寸选择;余莉;何计彬;叶成明;李小杰;李炳平;;石油钻采工艺(05);112-121页 * |
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| CN114776264A (en) | 2022-07-22 |
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