CN109085109A - A method of evaluation slippery water infiltrating time is to shale permeability impact effect - Google Patents
A method of evaluation slippery water infiltrating time is to shale permeability impact effect Download PDFInfo
- Publication number
- CN109085109A CN109085109A CN201811076061.0A CN201811076061A CN109085109A CN 109085109 A CN109085109 A CN 109085109A CN 201811076061 A CN201811076061 A CN 201811076061A CN 109085109 A CN109085109 A CN 109085109A
- Authority
- CN
- China
- Prior art keywords
- permeability
- core
- shale
- slick water
- rock core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 230000035699 permeability Effects 0.000 title claims abstract description 41
- 230000000694 effects Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000011156 evaluation Methods 0.000 title description 14
- 239000011435 rock Substances 0.000 claims abstract description 30
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 230000008595 infiltration Effects 0.000 claims abstract description 13
- 238000001764 infiltration Methods 0.000 claims abstract description 13
- 238000001228 spectrum Methods 0.000 claims abstract 3
- 238000011160 research Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims 1
- 238000002791 soaking Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 11
- 238000001035 drying Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000010998 test method Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 230000005311 nuclear magnetism Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
本发明公开了一种评价滑溜水浸润时间对页岩渗透率影响效果的方法，属于页岩气开发技术领域，主要包括以下步骤：步骤一：制备岩心，经过烘干后再冷却至室温；步骤二：对岩心进行抽真空48小时，然后饱和滑溜水1天，再进行核磁共振测试，得到岩心初始T2图谱曲线；步骤三：将岩心浸润在滑溜水中不同时间，分别开展核磁共振测试，得到不同浸润时间的T2图谱曲线；步骤四：计算核磁渗透率，比较滑溜水不同浸润时间对岩心渗透率的影响效果及规律。本发明采用核磁共振的测试方法，确保了滑溜水压裂液对页岩产生的影响能够真实全面的反映出来，数据处理结果精度较高。
The invention discloses a method for evaluating the effect of slick water infiltration time on shale permeability, which belongs to the technical field of shale gas development and mainly includes the following steps: Step 1: preparing a rock core, drying it and then cooling it to room temperature; Two: vacuumize the rock core for 48 hours, then saturate the slick water for 1 day, and then carry out the NMR test to obtain the initial T2 spectrum curve of the rock core; Step 3: soak the rock core in the slick water for different times, carry out the NMR test respectively, and obtain T 2 map curves of different infiltration times; Step 4: Calculate the NMR permeability, and compare the effects and laws of different infiltration times of slick water on the core permeability. The invention adopts the test method of nuclear magnetic resonance to ensure that the influence of the slick water fracturing fluid on the shale can be truly and comprehensively reflected, and the precision of the data processing result is high.
Description
Technical field
The invention belongs to shale gas development technique fields, and in particular to a kind of evaluation slippery water infiltrating time permeates shale
The method of rate impact effect.
Background technique
Slippery water is a kind of fracturing fluid system that hydraulic fracturing is carried out to shale oil and gas reservoir, is the pass of shale gas exploitation
One of key liquid.Relative to traditional gel fracture liquid system, feature of the slippery water fracturing fluid system with it efficiently, inexpensive exists
It is widely applied in shale gas exploitation.Slippery water is largely trapped in reservoir as a kind of fracturing fluid, will necessarily produce to shale permeability
Raw great influence.
Conventional core injures test evaluation method mainly for conventional reservoir, and has original as the shale of unconventional reservoir
The feature that beginning water saturation is low, porosity is low and permeability is extremely low.If being had using conventional core injury test evaluation method
The shortcomings that following several respects:
(1) the phenomenon that rich gas shale gas reservoir is widely present Abnormal low water saturation, the constraint that laboratory experiment is simulated
Water saturation is much larger than the original water saturation of shale reservoir.That is slippery water fracturing fluid is evaluated using conventional method
The comparison basis of shale damage evaluation is not present, conventional method cannot be used for evaluation fracturing fluid to the extent of injury of reservoir.
(2) conceptual confusion leads to the inconsistent of understanding.The key foundation condition of conventional method is indoor obtained beam
The water saturation tied up under water saturation and stratum reset condition is substantially coincident.Shale is as a kind of unconventional reservoir, room
The irreducible water saturation of interior acquisition is much larger than the water saturation under the initial condition of stratum.In this way, having led to conventional method not
Suitable for evaluating evaluation of the slippery water fracturing fluid to shale permeability.Some scholars are driven with regard to directly mistake with slippery water fracturing fluid
Gas phase permeability after replacing is compared with the absolute permeability of dry rock core, is as a result clearly mistake.
(3) rock core physical property is poor, and the error generated in conventional method measurement is larger, or even measurement error occurs greater than true value
The case where, it is not able to satisfy the required precision to experimental evaluation completely.The shale porosity in the main shale gas producing region in the world mainly divides
For cloth 0.5%~5% between, permeability is both less than 0.1 × 10-3μm2, far below the parameter value of conventional reservoir.Permeability it is true
Real value is very small, has any variation all to may cause biggish test error in test condition, while flowing during displacement test
The precision of meter amount is far from satisfying requirement of experiment.
Therefore, establishing a set of effective evaluation slippery water fracturing fluid has the method for shale permeability impact effect
Highly important theory significance and practical value.
Summary of the invention
Object of the present invention is to: a kind of evaluation slippery water infiltrating time is intended to provide to the side of shale permeability impact effect
Method, to solve the problems, such as background technique.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A method of evaluation slippery water infiltrating time mainly comprises the steps that shale permeability impact effect
Step 1: it chooses representational rock core and prepares rock core, dry cool down again after treatment.
The step 1 is specifically divided into:
1) it according to research needs, chooses representational rock core and prepares rock core；
2) by rock core, drying to constant weight under the conditions of 60 DEG C again, is put into vacuum desiccator and is cooled to room temperature.
Step 2: rock core vacuumize 48 hours, is then saturated slippery water 1 day, then carry out nuclear magnetic resonance test, obtains
To the initial T of rock core2Graphs.
Step 3: by rock core infiltration different time in slippery water, carry out nuclear magnetic resonance test respectively, obtain different infiltrations
The T of time2Graphs.
Step 4: calculating nuclear-magnetism permeability, compare slippery water difference infiltrating time to the impact effect of core permeability and
Rule.
The step 4 is specifically, according to shale penetration rate model: kNMR=8 × 10-8exp(8.1734T2g), k in formulaNMR
For nuclear-magnetism permeability, T2gFor relaxation time T2Geometrical mean, use T2Value calculates the rock core under the conditions of different infiltrating times
Nuclear-magnetism permeability compares slippery water infiltrating time to the impact effect and rule of core permeability.
Compared with prior art, the present invention mainly having the advantage that
1, the method for nuclear magnetic resonance is to obtain the permeability of rock core indirectly according to the fluid preservation situation monitored, is eliminated
The difficulty for manufacturing the ultralow original water saturation of rock core, also avoids being compared using phase permeability and absolute permeability general
Thought is obscured.
2, using the test method of nuclear magnetic resonance, the complicated possible other influences of laboratory operating procedures are eliminated, really
Protecting slippery water fracturing fluid really can comprehensively reflect the influence that shale generates, and data processed result precision is high.
3, this method can test the shale permeability under the conditions of different slippery water infiltrating times, to study slippery water pressure break
Liquid difference infiltrating time provides a kind of new experimental method to the impact effect and rule of shale percolation ability.
Detailed description of the invention
The present invention can be further illustrated by the nonlimiting examples that attached drawing provides；
Fig. 1 is in the present invention by the T of rock core infiltration different time in slippery water2The graphs in relaxation time；
Fig. 2 is T2 relaxation time corresponding graphs between 0.2ms~2ms in Fig. 1；
Fig. 3 is T2 relaxation time corresponding graphs between 4ms~4000ms in Fig. 1；
Fig. 4 is in the present invention by the histogram of rock core infiltration permeability of different time in slippery water.
Specific embodiment
In order to make those skilled in the art that the present invention may be better understood, with reference to the accompanying drawings and examples to this hair
Bright technical solution further illustrates.
A kind of evaluation slippery water infiltrating time of the invention mainly includes following to the method for shale permeability impact effect
Step:
Step 1 chooses Chongqing northeast a bite shale gas well Longma small stream group shale core and prepares rock core, so according to research needs
By rock core, drying to constant weight under the conditions of 60 DEG C afterwards, is put into vacuum desiccator and is cooled to room temperature.
Step 2,
1) rock core is put into vacuum evacuation device first, vacuumizes 48 hours, is then saturated slippery water 1 day.
2) nuclear magnetic resonance test is carried out, test parameter is set: when echo sounding time 0.1ms, echo number 1024, waiting
Between 2000ms, scanning times 64, obtain the initial T of rock core2Relaxation time and its corresponding amplitude, as initial value.
Step 3: by rock core infiltration 5 days, 10 days, 15 days, 20 days, 25 days, 30 days, 35 days, 45 days and 60 in slippery water
Its totally 9 different time carries out nuclear magnetic resonance test respectively, test parameter: echo sounding time 0.1ms, echo number is arranged
1024, waiting time 2000ms, scanning times 64, obtain the T of different infiltrating times2Relaxation time and its corresponding amplitude.
The equipment that above-mentioned carry out nuclear magnetic resonance test uses is market products.
The T that step 2 and step 3 are obtained2Relaxation time and its corresponding amplitude summarize, such as table 1:
Table 1
According to table 1 and formula
T can be obtained2iValue, such as table 2:
Table 2
Wherein, i represents T2Each point on graphs, T2iAnd niRespectively represent the T at each point2Relaxation time and its phase
Amplitude is answered, m is the T of test2Points, T2gFor relaxation time T2Geometrical mean.Different infiltrating times can be obtained according to table 2
The T2 relaxation time graphs, as shown in Fig. 1 to Fig. 3.
Step 4: finally according to shale penetration rate model:
kNMR=8 × 10-8exp(8.1734T2g) (1-2)
K in above formulaNMRFor nuclear-magnetism permeability, T2gFor relaxation time T2Geometrical mean, formula (1-2) is by paper " river
The research of Nan Longmaxi group shale nuclear-magnetism permeability new model " it is open, details are not described herein again for derivation process, is calculated using T2 value
To the nuclear-magnetism permeability of rock core, T is arrived according to what formula (1-1) was calculated2gSuch as table 3:
Table 3
The histogram of the permeability of the rock core of different infiltrating times can be obtained according to table 3, as shown in Figure 4.
It is impact effect and rule of the comparable slippery water infiltrating time to core permeability according to Fig. 4.
Above to a kind of evaluation slippery water infiltrating time provided by the invention to the method for shale permeability impact effect into
It has gone and has been discussed in detail.The explanation of specific embodiment is merely used to help understand method and its core concept of the invention.It should refer to
It out, for those skilled in the art, without departing from the principle of the present invention, can also be to the present invention
Some improvement and modification can also be carried out, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811076061.0A CN109085109A (en) | 2018-09-14 | 2018-09-14 | A method of evaluation slippery water infiltrating time is to shale permeability impact effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811076061.0A CN109085109A (en) | 2018-09-14 | 2018-09-14 | A method of evaluation slippery water infiltrating time is to shale permeability impact effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109085109A true CN109085109A (en) | 2018-12-25 |
Family
ID=64841528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811076061.0A Pending CN109085109A (en) | 2018-09-14 | 2018-09-14 | A method of evaluation slippery water infiltrating time is to shale permeability impact effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109085109A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562199A (en) * | 2019-02-13 | 2020-08-21 | 中国石油天然气股份有限公司 | Method and system for determining energy storage and replacement performance of compact oil |
| CN114076729A (en) * | 2020-08-12 | 2022-02-22 | 中国石油天然气股份有限公司 | Quantitative research method for salt dissolution of salt-containing shale oil reservoir |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990851A (en) * | 2015-06-23 | 2015-10-21 | 西南石油大学 | Novel experimental research method for shale sensitivity |
| CN107329182A (en) * | 2017-07-26 | 2017-11-07 | 中国石油天然气股份有限公司 | Method and device for determining permeability of reservoir |
| CN107843937A (en) * | 2016-09-20 | 2018-03-27 | 中国石油化工股份有限公司 | The nuclear magnetic resonance characterizing method of the effective percolation ability of low permeability sandstone reservoirs |
-
2018
- 2018-09-14 CN CN201811076061.0A patent/CN109085109A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990851A (en) * | 2015-06-23 | 2015-10-21 | 西南石油大学 | Novel experimental research method for shale sensitivity |
| CN107843937A (en) * | 2016-09-20 | 2018-03-27 | 中国石油化工股份有限公司 | The nuclear magnetic resonance characterizing method of the effective percolation ability of low permeability sandstone reservoirs |
| CN107329182A (en) * | 2017-07-26 | 2017-11-07 | 中国石油天然气股份有限公司 | Method and device for determining permeability of reservoir |
Non-Patent Citations (2)
| Title |
|---|
| BIN YUAN ET AL.: "Effect of slick water on permeability of shale gas reservoirs", 《JOURNAL OF ENERGY RESOURCES TECHNOLOGY》 * |
| 周尚文 等: "川南龙马溪组页岩核磁渗透率新模型研究", 《中国石油大学学报（自然科学版）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562199A (en) * | 2019-02-13 | 2020-08-21 | 中国石油天然气股份有限公司 | Method and system for determining energy storage and replacement performance of compact oil |
| CN111562199B (en) * | 2019-02-13 | 2022-12-02 | 中国石油天然气股份有限公司 | Method and system for determining energy storage and replacement performance of compact oil |
| CN114076729A (en) * | 2020-08-12 | 2022-02-22 | 中国石油天然气股份有限公司 | Quantitative research method for salt dissolution of salt-containing shale oil reservoir |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Elwegaa et al. | Improving oil recovery from shale oil reservoirs using cyclic cold carbon dioxide injection–An experimental study | |
| CN106501144B (en) | A kind of tight sand calculation of permeability based on the double cutoff values of nuclear magnetic resonance | |
| CN105464654B (en) | Method and device for determining saturation index of tight sandstone | |
| Cao et al. | Characteristics and origin of abnormally high porosity zones in buried Paleogene clastic reservoirs in the Shengtuo area, Dongying Sag, East China | |
| CN103760082B (en) | Shale layer system tight reservoir crude oil effective movable space determination method and device | |
| CN107727679A (en) | One kind characterizes Deep Carbonate Rocks petrophysics characterization method | |
| RU2016134036A (en) | INDICES OF STRUCTURAL DIFFERENCE OF UPPER ZONES OF FILLING THE ORDOVICIAN Limestone AND METHOD FOR DETERMINING THEM | |
| Elwegaa et al. | Improving oil recovery from shale oil reservoirs using cyclic cold nitrogen injection–An experimental study | |
| CN109085109A (en) | A method of evaluation slippery water infiltrating time is to shale permeability impact effect | |
| Tu* et al. | Experimental and Numerical Study of Shale Oil EOR by Surfactant Additives in Fracturing Fluid | |
| Alshehri et al. | A study of gel-based conformance control within fractured carbonate cores using low-field nuclear-magnetic-resonance techniques | |
| CN102619502A (en) | Method for determining crack permeability of crack-pore seepage experiment model | |
| CN112858367B (en) | A method and device for measuring rock capillary pressure under reservoir temperature and pressure environment | |
| CN111426617B (en) | Quantitative prediction method for porosity of dense reservoir of land lake basin under geological conditions | |
| CN109085108A (en) | A method of evaluation slippery water intrusion volume is to shale permeability impact effect | |
| Ren et al. | Determination of microscopic waterflooding characteristics and influence factors in ultra-low permeability sandstone reservoir | |
| CN109060634A (en) | Based on gas permeability evaluation slippery water to the method for shale permeability impact effect | |
| RU2542998C1 (en) | Gas permeability anisotropy laboratory measurement on whole cores | |
| CA1293923C (en) | Matrix treatment process for oil extraction applications | |
| CN108956422B (en) | An experimental method for measuring the porosity of tight reservoirs | |
| CN106323703A (en) | Manufacturing method of compact oil reservoir horizontal well multistage staged fracturing physical model | |
| CN109538175A (en) | The resident method sealed up for safekeeping of LOW PERMEABILITY RESERVOIR water slug auxiliary nitrogen soak | |
| CN117147609A (en) | Nuclear magnetic porosity calculation method for oil-based mud invading oil layer | |
| Loahardjo et al. | Oil recovery from Bentheim sandstone by sequential waterflooding and spontaneous imbibition | |
| CN105717016B (en) | Method for calculating permeability of coal sample |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181225 |