CN113062717B - Fracturing horizontal well same well gap asynchronous injection and production experimental device - Google Patents
Fracturing horizontal well same well gap asynchronous injection and production experimental device Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 171
- 239000007924 injection Substances 0.000 title claims abstract description 171
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 122
- 244000264242 Descurainia sophia Species 0.000 title claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000011435 rock Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 238000011084 recovery Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000011161 development Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 235000020681 well water Nutrition 0.000 description 3
- 239000002349 well water Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
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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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The embodiment of the application provides an asynchronous injection and production experimental apparatus between fracturing horizontal well same well crack, includes: the system comprises a liquid storage device, a same-well core injection and production unit, a metering pump and a metering device, wherein the liquid storage device stores injection liquid, the metering pump inputs the injection liquid in the liquid storage device into the same-well core injection and production unit, and the metering device is used for metering the output liquid of the same-well core injection and production unit; one end of a metering pump is connected with the liquid storage device, the other end of the metering pump is connected with a first connecting pipeline which is connected between at least one pair of two adjacent core holders in the same well core injection and production unit, and a second connecting pipeline which is connected between at least one other pair of other two adjacent core holders in the same well core injection and production unit is connected with the metering device; the method and the device can acquire the injection and production information for injection and production of different gaps of the same well quickly, accurately and conveniently, and further determine the recovery ratio of injection and production of the same well according to the injection and production information.
Description
Technical Field
The application relates to the field of oil and gas exploration, in particular to an asynchronous injection and production experimental device between same-well fractures of a fractured horizontal well.
Background
At present, most of high-permeability oil fields in water injection development enter a high water-cut period, and the water injection utilization rate is low; the method is characterized in that the method is low in permeability, compact and shale oil reservoir, the designed water injection amount is difficult to achieve by adopting vertical well water injection, the cost of horizontal well water injection is high, in case of water channeling, ineffective water injection is caused, the water injection development effect is seriously reduced, in order to improve the recovery ratio, the beneficial effect of fracturing the same well injection and production of the horizontal well on water injection development oil field is researched, the field test is needed, the development effect is verified, but the cost of the field test is higher, the period is longer, the implementation process of the same well injection and production is complex, and the development effect of the same well injection and production cannot be obtained in a short time.
Therefore, the inventor provides an asynchronous injection and production experimental device between the same well seams of the fractured horizontal well by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
To the problem among the prior art, this application provides an asynchronous injection and production experimental apparatus between fracturing horizontal well same well crack, can be fast, accurate and convenient acquire carry out the injection and production information of injection and production to the different cracks of same well, and then according to this injection and production information confirm the recovery ratio of injection and production of same well.
In order to solve the technical problem, the application provides the following technical scheme:
the application provides an asynchronous injection and production experimental apparatus between fracturing horizontal well same well crack, include: the device comprises a liquid storage device, a same-well rock core injection and production unit, a metering pump and a metering device, wherein the liquid storage device stores injection liquid, the metering pump inputs the injection liquid in the liquid storage device into the same-well rock core injection and production unit, and the metering device is used for metering the output liquid of the same-well rock core injection and production unit; one end of the metering pump is connected with the liquid storage device, the other end of the metering pump is connected with a first connecting pipeline which is connected between at least one pair of two adjacent core holders in the same well core injection and production unit, and a second connecting pipeline which is connected between at least one other pair of other two adjacent core holders in the same well core injection and production unit is connected with the metering device.
And further, the system also comprises a pressure sensor for monitoring the real-time pressure of the core injection and production unit in the same well, and the pressure sensor is arranged between the metering pump and the first connecting pipeline.
And the system further comprises an injection one-way valve for controlling the one-way transmission of injection liquid, when the pressure sensor monitors that the real-time pressure of the core injection and production unit in the same well reaches a preset pressure threshold value, the injection is stopped, and the injection one-way valve is in a closed state.
Furthermore, the device also comprises a collection one-way valve for controlling the one-way transmission of the produced liquid, and the closed state of the collection one-way valve is opposite to that of the injection one-way valve.
Further, the device also comprises a constant temperature box for maintaining the same-well core injection and production unit at a set temperature, wherein the same-well core injection and production unit is arranged in the constant temperature box.
And further, the rock mass testing device further comprises a pressure pump for controlling the core holder to apply a fixed confining pressure to the target rock mass, and the pressure pump is connected with the core holder.
Further, a quantitative target fluid is preset in the pore space of the target rock, and the produced fluid comprises at least one of the target fluid and the injection fluid.
Further, the metering pump is an ISCO high-precision plunger pump.
Further, the metering device is a measuring cylinder.
Further, the pressure pump is a confining pressure tracking pump.
According to the technical scheme, the asynchronous injection and production experimental device for the fractured horizontal well same-well seams is characterized in that the asynchronous injection and production experimental device for the fractured horizontal well same-well seams is provided with a same-well core injection and production unit, the same-well core injection and production unit comprises at least three core holders which are connected in series and fixed with target rock masses, a first connecting pipeline for connecting at least one pair of adjacent core holders is equivalent to an artificial fracture in the underground, a second connecting pipeline for connecting at least another pair of adjacent core holders is equivalent to another artificial fracture in the same well, injection liquid in a liquid storage device is input into the same-well core injection and production unit from the first connecting pipeline through a metering pump, and production liquid of the same-well core injection and production unit is collected from the second connecting pipeline through a metering device, so that injection and production information for injection and production of different seams in the same well is accurately obtained, and the recovery ratio for injection and production in the same well is determined according to the injection and production information.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an asynchronous injection-production experimental device between same-well fractures of a fractured horizontal well.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "coupled" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Considering that most of the high-permeability oil fields in water injection development enter a high water-cut period at present, the water injection utilization rate is low; the method is characterized in that the low-permeability and compact oil reservoir adopts vertical well water injection to be difficult to reach the designed water injection amount, the water injection cost of the horizontal well is high, in case of water channeling, ineffective water injection is caused, the water injection development effect is seriously reduced, in order to improve the recovery ratio, the beneficial effect of the injection and production in the same well on the water injection development oil field is researched, the field test is required to be carried out, and the development effect is verified, but the cost of the field test is higher, the period is longer, the injection and production implementation process in the same well is more complex, and the development effect of the injection and production in the same well cannot be obtained in a short time.
In order to acquire the injection and production information for injecting and producing different gaps of the same well quickly, accurately and conveniently and further determine the recovery ratio for injecting and producing the same well according to the injection and production information, the application provides an embodiment of an asynchronous injection and production experimental device between the same well gaps of a fractured horizontal well, and referring to fig. 1, in the embodiment, the asynchronous injection and production experimental device between the same well gaps of the fractured horizontal well specifically comprises: the device comprises a liquid storage device 1 storing injection liquid, a same-well core injection and production unit 3, a metering pump 2 inputting the injection liquid in the liquid storage device 1 into the same-well core injection and production unit 3, and a metering device 42 for metering the output liquid of the same-well core injection and production unit 3, wherein the same-well core injection and production unit 3 comprises at least three core holders which are connected in series and fixed with target rock masses.
One end of the metering pump 2 is connected with the liquid storage device 1, the other end of the metering pump 2 is connected with a first connecting pipeline between at least one pair of adjacent core holders in the same-well core injection and production unit 3, and a second connecting pipeline between at least another pair of adjacent core holders in the same-well core injection and production unit 3 is connected with the metering device.
Optionally, the core injection and production unit 3 in the same well includes at least three core holders, each core holder is connected in series through a connecting pipe to form a whole, the core holders are respectively fixed with target rock masses, and the target rock masses may be of various specifications, for example: the diameter is 25mm, 38mm or 1000mm full diameter, only need select for use the holder of corresponding model can, the target rock mass is taken from same underground, then the connecting tube who connects two adjacent rock core holders is equivalent to this artificial crack in the pit, and this artificial crack can be for the injection seam that is used for the injected water, also can be for the production seam that is used for gathering oil.
In a specific example, referring to fig. 1, the core injection and production unit 3 in the same well comprises four core holders connected in series without being connected end to end: the core holder 8A is connected with the core holder 8B through a connecting pipe 8AB (equivalent to a first artificial fracture), the core holder 8B is connected with the core holder 8C through a connecting pipe 8BC (equivalent to a second artificial fracture), and the core holder 8C is connected with the core holder 8D through a connecting pipe 8CD (equivalent to a third artificial fracture), so that each artificial fracture can be alternately set as an injection slit (equivalent to the first connecting pipe) and a production slit (equivalent to the second connecting pipe), for example, the first artificial fracture is set as an injection slit, the second artificial fracture adjacent to the first artificial fracture is set as a production slit, the third artificial fracture adjacent to the second artificial fracture is set as an injection slit, and if there are other artificial fractures, the type of each artificial fracture is determined according to the alternate setting rules.
In another embodiment, referring to fig. 1, the leftmost end of the core holder 8A may correspond to a first artificial fracture and the rightmost end of the core holder 8D may correspond to a fifth artificial fracture.
In another specific example, when the number of core holders included in the core injection and production unit 3 in the same well exceeds three, that is, the number of artificial fractures formed between adjacent core holders exceeds two, the type of each artificial fracture may also be set arbitrarily, as long as both types are ensured, for example, the number of core holders is five, the number of artificial fractures formed between adjacent core holders is four, two of the artificial fractures may be set arbitrarily as injection fractures, and the other two artificial fractures are set as production fractures; any three artificial cracks can be set as injection cracks, and the other artificial crack can be set as a production crack.
Optionally, after determining what type of artificial fracture each connecting pipeline corresponds to, corresponding injection and production operations may be performed, for example, injecting the injection liquid in the liquid storage device 1 into the core injection and production unit 3 of the same well from the connecting pipeline of the injection fracture type by using the metering pump 2, and then collecting the production liquid of the core injection and production unit 3 of the same well from the connecting pipeline of the production fracture type by using the metering device 42, for example.
In a specific example, one end of the metering pump 2 is connected to the liquid storage device 1 for extracting the injection liquid (e.g., water) therefrom, and the other end of the metering pump 2 is respectively connected to the connecting pipeline 8AB and the connecting pipeline 8CD for injecting the injection liquid into the core injection and production unit 3 from the connecting pipeline 8AB and the connecting pipeline 8CD, and similarly, the metering device 42 may be connected to the connecting pipeline 8BC for collecting the production liquid of the core injection and production unit 3 from the connecting pipeline 8 BC.
In another embodiment of this application, the one end of core holder 8A is connecting tube 8AB, a metering device 41 can be connected to core holder 8A's the other end for gather with the output of well core injection unit 3, with the same principle, core holder 8D's one end is connecting tube 8CD, a metering device 43 can be connected to core holder 8D's the other end for gather with the output of well core injection unit 3.
Optionally, after the metering device 42 collects the produced fluid, according to the specific components and fluid amount of the produced fluid, the injection and production information obtained in the injection and production process can be obtained through conversion, where the injection and production information includes, but is not limited to: the permeability is determined according to the change of the pressure difference between two ends of a target rock body, and the fluidity is determined according to the ratio of the permeability to the viscosity of the target liquid.
As can be seen from the above description, according to the asynchronous injection and production experimental device between the same well gaps of the fractured horizontal well provided by the embodiment of the present application, the same well core injection and production unit 3 is provided, the same well core injection and production unit 3 includes at least three core holders fixed with target rock masses and connected in series, wherein a first connecting pipeline connecting two adjacent core holders is equivalent to an artificial fracture in the underground, a second connecting pipeline connecting two other adjacent core holders is equivalent to another artificial fracture in the same well, the injection fluid in the fluid storage device 1 is input into the same well core injection and production unit 3 from the first connecting pipeline through the metering pump 2, and the production fluid of the same well core injection and production unit 3 is collected from the second connecting pipeline through the metering device 42, so as to accurately obtain the injection and production information for injection and production of different gaps in the same well, and further determine the recovery ratio for injection and production in the same well according to the injection and production information.
As a preferred embodiment, the system further comprises a pressure sensor 7, wherein the pressure sensor 7 is arranged between the metering pump 2 and the first connecting pipeline, when the metering pump 2 inputs injection liquid into the core injection and production unit 3 in the same well through the first connecting pipeline, the pressure sensor 7 can monitor real-time pressure of the core injection and production unit 3 in the same well, and the pressure sensor 7 may be an existing hydraulic and/or pneumatic sensor.
As a preferred embodiment, the system further comprises an injection one-way valve 5 for controlling one-way transmission of injection liquid and a collection one-way valve 62 for controlling one-way transmission of production liquid, wherein the injection one-way valve 5 is arranged between the metering pump 2 and the first connecting pipeline, the collection one-way valve 62 is arranged between the metering device 42 and the second connecting pipeline, and the injection one-way valve 5 and the collection one-way valve 62 can control not only one-way conduction of fluid but also conduction and closing of corresponding pipelines, so that asynchronous operation of "injection" and "collection" in the injection and collection process can be realized.
In another embodiment of the present disclosure, a collecting check valve 61 may be further disposed to connect the core holder 8A and the metering device 41, and similarly, a collecting check valve 63 may be further disposed to connect the core holder 8D and the metering device 43.
Optionally, when the pressure sensor 7 monitors that the real-time pressure of the core injection and production unit 3 in the same well does not reach a preset pressure threshold (for example, 25 MPa), the injection check valve 5 is in an open state, the collection check valve 6 is in a closed state, and at this time, the metering pump 2 continuously inputs injection liquid into the core injection and production unit 3 in the same well, so as to increase the core pore pressure of a target rock body in each core holder; when the pressure sensor 7 monitors that the real-time pressure of the core injection and production unit 3 in the same well reaches a preset pressure threshold (for example, 25 MPa), the injection check valve 5 is in a closed state, the collection check valve 6 is in an open state, and at this time, the core injection and production unit 3 in the same well outputs output liquid to the metering device 42 under the action of pressure difference.
As a preferred embodiment, the method further comprises a constant temperature box 10 for maintaining the same-well core injection and production unit 3 at a set temperature and a pressure pump 9 for controlling the core holder to apply a fixed confining pressure to the target rock mass, wherein the same-well core injection and production unit 3 is arranged inside the constant temperature box 10, the pressure pump 9 is connected with the core holder, the set temperature can be the current underground actual temperature, the fixed confining pressure can be the current underground actual confining pressure, and the acquired injection and production information is more reliable and accurate by attaching the temperature and the pressure in the real production environment in the injection and production process.
As a preferred embodiment, the metering pump 2 may be an ISCO high-precision plunger pump, or may be another pump capable of driving the injection liquid to flow, the metering device 42 may be a measuring cylinder, or may be another device capable of quantitatively measuring the volume of the injection liquid, and the pressure pump 9 may be a confining pressure tracking pump, or may be another pump capable of monitoring the clamping pressure of the core holder.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (10)
1. The utility model provides an asynchronous injection and production experimental apparatus between fractured horizontal well same well crack which characterized in that includes: the system comprises a liquid storage device, a same-well core injection and production unit, a metering pump and a metering device, wherein injection liquid in the liquid storage device is input into the same-well core injection and production unit, the metering pump is used for metering output liquid of the same-well core injection and production unit, the same-well core injection and production unit comprises at least three core holders which are connected in series and fixed with target rock masses, a first connecting pipeline for connecting two adjacent core holders is equivalent to one artificial crack in the well, a second connecting pipeline for connecting the other two adjacent core holders is equivalent to the other artificial crack in the same well, the injection liquid in the liquid storage device is input into the same-well core injection and production connecting pipeline unit from the first connecting pipeline through the metering pump, and output liquid of the same-well core injection and production unit is collected from the second connecting pipeline through the metering device, so that injection and production information for injection and production of different cracks in the same well can be accurately obtained;
one end of the metering pump is connected with the liquid storage device, the other end of the metering pump is connected with a first connecting pipeline between at least one pair of adjacent core holders in the same well core injection and production unit, and a second connecting pipeline between at least another pair of adjacent core holders in the same well core injection and production unit is connected with the metering device.
2. The asynchronous injection and production experimental device between the same well fractures of the fractured horizontal well as defined by claim 1, further comprising a pressure sensor for monitoring the real-time pressure of the same well core injection and production unit, wherein the pressure sensor is arranged between the metering pump and the first connecting pipeline.
3. The asynchronous injection and production experimental device between fractured horizontal well and common well fractures according to claim 2 is characterized by further comprising an injection one-way valve used for controlling one-way transmission of injection liquid, when the pressure sensor monitors that the real-time pressure of the core injection and production unit of the common well reaches a preset pressure threshold value, injection is stopped, and the injection one-way valve is in a closed state.
4. The experimental device for the asynchronous injection and production between the same well fractures of the fractured horizontal well according to claim 3, further comprising a collection one-way valve for controlling one-way transmission of a produced liquid, wherein the collection one-way valve is opposite to the injection one-way valve in closing state.
5. The asynchronous injection and production experimental device between the same well fractures of the fractured horizontal well as defined by claim 1, further comprising a constant temperature box for maintaining the same well core injection and production unit at a set temperature, wherein the same well core injection and production unit is arranged inside the constant temperature box.
6. The asynchronous injection and production experimental device between the same well joints of the fractured horizontal well as the fractured horizontal well is characterized by further comprising a pressure pump used for controlling the core holder to apply a fixed confining pressure on the target rock mass, wherein the pressure pump is connected with the core holder.
7. The asynchronous injection and production experiment device between the same well joints of the fractured horizontal well as recited in claim 1, wherein quantitative target fluid is pre-arranged in the pores of the target rock mass, and the produced fluid comprises at least one of the target fluid and the injection fluid.
8. The asynchronous injection and production experimental device between the same well fractures of the fractured horizontal well as the claim 1 is characterized in that the metering pump is an ISCO high-precision plunger pump.
9. The asynchronous injection and production experimental device between the same well fractures of the fractured horizontal well as claimed in claim 1, wherein the metering device is a measuring cylinder.
10. The experimental device for the asynchronous injection and production between the same well fractures of the fractured horizontal well according to claim 6, wherein the pressure pump is a confining pressure tracking pump.
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| CN114876452A (en) * | 2022-05-13 | 2022-08-09 | 中国石油测井-阿特拉斯合作服务公司 | Logging equipment calibration method and logging equipment calibration system |
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| CN106522934A (en) * | 2016-12-12 | 2017-03-22 | 中国石油大学(北京) | Physical simulation experimental device and method for development of complex fractured oil reservoir horizontal well |
| CN108361007A (en) * | 2018-01-18 | 2018-08-03 | 中国石油天然气股份有限公司 | Low-permeability reservoir multilayer injection-production physical simulation device and method |
| CN109057763A (en) * | 2018-07-27 | 2018-12-21 | 东北石油大学 | It realizes to the judgment method that emulsification position occurs in long cores |
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