CN103573244A - Method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking - Google Patents
Method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking Download PDFInfo
- Publication number
- CN103573244A CN103573244A CN201310512525.9A CN201310512525A CN103573244A CN 103573244 A CN103573244 A CN 103573244A CN 201310512525 A CN201310512525 A CN 201310512525A CN 103573244 A CN103573244 A CN 103573244A
- Authority
- CN
- China
- Prior art keywords
- fluid
- discharge capacity
- inject
- injection rate
- gel breaker
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 86
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 37
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 title claims abstract description 29
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 265
- 238000006073 displacement reaction Methods 0.000 claims abstract description 102
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000002347 injection Methods 0.000 claims description 157
- 239000007924 injection Substances 0.000 claims description 157
- 239000007788 liquid Substances 0.000 claims description 81
- 239000003292 glue Substances 0.000 claims description 51
- 238000005086 pumping Methods 0.000 claims description 40
- 238000005553 drilling Methods 0.000 claims description 20
- 238000000605 extraction Methods 0.000 claims description 20
- 239000004576 sand Substances 0.000 claims description 20
- 239000007800 oxidant agent Substances 0.000 claims description 18
- 238000005065 mining Methods 0.000 abstract 2
- 230000000740 bleeding effect Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 22
- 239000000047 product Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to a method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking, belongs to a method suitable for coal bed gas yield increment mining of low-permeability soft coal bed, and mainly solves the technical problems of low gas yield and poor flow conductivity of a conventional coal bed gas mining method. According to the technical scheme, the method comprises the following steps: 1) injecting a drilled gas bleeding well with a pre-ahead fluid-active water through a pump to enable coal bed to generate cracks, wherein the filling pressure is higher than the coal bed fracturing pressure; 2) injecting a sand-carrying fluid; 3) injecting a displacement fluid; 4) stopping the pump for more than 10 minutes, and measuring coal bed pressure drop; 5) injecting a gum breaking agent; 6) filling a displacement fluid. The method has the advantages of long and wide producing gaps, good flow conductivity and high gas yield.
Description
Technical field
The present invention relates to a kind of method that in cbm development based under the broken glue of low temperature, guanidine glue laminated is split, it belongs to a kind of coal-bed-gas production-increase exploitation method that is applicable to hyposmosis soft seam.
Background technology
Coal bed gas, Main Ingredients and Appearance is methane (CH
4), be and a kind of clean energy resource gas of coal association, wherein 90% left and right is to be adsorbed in matrix of coal with adsorbed state, 10% left and right is free between crack with free state.China's coal bed gas resource amount approximately 36.8 trillion m
3, occupy third place in the world, suitable with China's natural gas reserves.It is develop and useedd making up the deficiency of China's conventional energy resource, fundamentally eliminate the disasters such as the gas explosion that causes in coal production, Gas Outburst, reduce the environment pollution that a large amount of drawing-off gas cause and the energy resource structure of improving China, accelerating China, to take coal be that main energy resource system is gradually to the conversion process of the mode of sustainable development of environmentally friendlyization, form the new industry of clear energy sources, all there is important strategic importance.
China is not only coal resources big country, and coal bed gas resource is also extremely abundant, but up to now, the total experiment situation from the whole nation, and most coalbed gas loggings yield poorly, production decline is fast, are difficult to form stable industrialness source of the gas.Its main cause is that the general permeability in China coal seam reset pressure low, that exploit shallow coal bed gas is not high, desorption rate is slow, makes coal bed gas desorb and the migration in coal seam thereof very difficult.Abroad cbm development facts have proved, pressure break, gas injection and slot are three key links in Coal-bed gas stimulation technology.Adopt at present pressure break to improve the mode of permeability, often after pressure break, initial gas production increases to some extent, but the just decay of very fast gas production, therefore simple pressure break has some limitations improving the output of coal bed gas.
Pressure break is the Main Yield-increasing method in hyposmosis, extra-low permeability oil, gas field, is also the main method of cbm development, and wherein main employing is that riverfrac treatment and guanidine glue laminated are split.But China's overwhelming majority coal seam " three is low " situation in low-permeability, low reservoir pressure, low saturation, and ature of coal is softer, belong to soft seam, coal seam temperature lower (generally at 10～20 ℃), adopt traditional guanidine glue laminated to split can to exist fracturing liquid rubber-breaking not in time, not thorough, particularly fracturing fluid injection pressure is greater than coal seam pressure, fracturing fluid leak, guanidine glue forms filter cake in fracture faces, can reduce the problem of flow conductivity.
Summary of the invention
The object of the invention is to solve the low and poor technical problem of flow conductivity of gas production that the method for existing exploiting coal bed methane exists, a kind of method that in the cbm development based under the broken glue of low temperature that seam is long, flow conductivity is strong and gas production is high, guanidine glue laminated is split of making is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The method that in cbm development under the broken glue of low temperature, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 0.5m that pre-prepad fluid injects discharge capacity
3/ min～10m
3/ min, pre-prepad fluid injection rate is 5m
3～500m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
6) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
Another breaks based on low temperature the method that in the cbm development under glue, guanidine glue laminated is split the present invention, and it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 0.5m that pre-prepad fluid injects discharge capacity
3/ min～10m
3/ min, pre-prepad fluid injection rate is 5m
3～500m
3;
2) inject prepad fluid, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min～10m
3/ min, viscous liquid injection rate 1m
3～500m
3;
3) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
4) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
5) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
6) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
7) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
Another breaks based on low temperature the method that in the cbm development under glue, guanidine glue laminated is split the present invention, and it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min～10m
3/ min, viscous liquid injection rate 1m
3～500m
3;
2) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 1m
3～500m
3;
3) inject insulating liquid, described insulating liquid is active water, and it is 0.5m that insulating liquid injects discharge capacity
3/ min～10m
3/ min, insulating liquid injection rate 0.5m
3～500m
3;
4) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
5) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
6) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
7) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
8) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
Another breaks based on low temperature the method that in the cbm development under glue, guanidine glue laminated is split again in the present invention, and it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min～10m
3/ min, viscous liquid injection rate 1m
3～500m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, HRS gel breaker injection rate 5m
3～500m
3;
6) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
Described gel breaker is any one in oxidants product or acidification of oil field series products.
Because the present invention has adopted technique scheme, solved the low and poor technical problem of flow conductivity of gas production that existing exploitation method exists, therefore, compare with background technology, the present invention have advantages of make seam long, make that seam is wide, flow conductivity is strong and gas production is high.
The specific embodiment
Embodiment 1
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 0.5m that pre-prepad fluid injects discharge capacity
3/ min, pre-prepad fluid injection rate is 5m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min, load fluid injection rate 5m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min, active water injection rate 5m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, described gel breaker is oxidants product, and it is 0.5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 5m
3;
6) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 5m
3.
Embodiment 2
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 10m that pre-prepad fluid injects discharge capacity
3/ min, pre-prepad fluid injection rate is 500m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 10m that load fluid injects discharge capacity
3/ min, load fluid injection rate 500m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 10m that active water injects discharge capacity
3/ min, active water injection rate 500m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, described gel breaker is oxidants product, and it is 10m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 500m
3;
6) inject displacement fluid, it is 10m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 500m
3.
Embodiment 3
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 5m that pre-prepad fluid injects discharge capacity
3/ min, pre-prepad fluid injection rate is 150m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 4m that load fluid injects discharge capacity
3/ min, load fluid injection rate 48m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 4m that active water injects discharge capacity
3/ min, active water injection rate 8m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, described gel breaker is oxidants product, and it is 5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 100m
3;
6) inject displacement fluid, it is 4m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 32m
3.
Embodiment 4
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 0.5m that pre-prepad fluid injects discharge capacity
3/ min, pre-prepad fluid injection rate is 5m
3;
2) inject prepad fluid, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 1m
3;
3) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min, load fluid injection rate 5m
3;
4) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min, active water injection rate 5m
3;
5) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
6) inject gel breaker, described gel breaker is oxidants product, and it is 0.5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 5m
3;
7) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 5m
3.
Embodiment 5
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 10m that pre-prepad fluid injects discharge capacity
3/ min, pre-prepad fluid injection rate is 500m
3;
2) inject prepad fluid, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 10m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 500m
3;
3) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 10m that load fluid injects discharge capacity
3/ min, load fluid injection rate 500m
3;
4) inject displacement fluid, described displacement fluid is active water, and it is 10m that active water injects discharge capacity
3/ min, active water injection rate 500m
3;
5) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
6) inject gel breaker, described gel breaker is oxidants product, and it is 10m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 500m
3;
7) inject displacement fluid, it is 10m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 500m
3.
Embodiment 6
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 5m that pre-prepad fluid injects discharge capacity
3/ min, pre-prepad fluid injection rate is 150m
3;
2) inject prepad fluid, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 4m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 40m
3;
3) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 4m that load fluid injects discharge capacity
3/ min, load fluid injection rate 44m
3;
4) inject displacement fluid, described displacement fluid is active water, and it is 4m that active water injects discharge capacity
3/ min, active water injection rate 10m
3;
5) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
6) inject gel breaker, described gel breaker is oxidants product, and it is 5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 110m
3;
7) inject displacement fluid, it is 4m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 36m
3.
Embodiment 7
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 1m
3;
2) inject gel breaker, described gel breaker is oxidants product, and it is 0.5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 1m
3;
3) inject insulating liquid, described insulating liquid is active water, and it is 0.5m that insulating liquid injects discharge capacity
3/ min, insulating liquid injection rate 0.5m
3;
4) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min, load fluid injection rate 5m
3;
5) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min, active water injection rate 5m
3;
6) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
7) inject gel breaker, described gel breaker is oxidants product, and it is 0.5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 5m
3;
8) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 5m
3.
Embodiment 8
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 10m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 500m
3;
2) inject gel breaker, described gel breaker is oxidants product, and it is 10m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 500m
3;
3) inject insulating liquid, described insulating liquid is active water, and it is 10m that insulating liquid injects discharge capacity
3/ min, insulating liquid injection rate 500m
3;
4) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 10m that load fluid injects discharge capacity
3/ min, load fluid injection rate 500m
3;
5) inject displacement fluid, described displacement fluid is active water, and it is 10m that active water injects discharge capacity
3/ min, active water injection rate 500m
3;
6) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
7) inject gel breaker, described gel breaker is oxidants product, and it is 10m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 500m
3;
8) inject displacement fluid, it is 10m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 500m
3.
Embodiment 9
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 4m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 48m
3;
2) inject gel breaker, described gel breaker is oxidants product, and it is 5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 110m
3;
3) inject insulating liquid, described insulating liquid is active water, and it is 5m that insulating liquid injects discharge capacity
3/ min, insulating liquid injection rate 50m
3;
4) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 4m that load fluid injects discharge capacity
3/ min, load fluid injection rate 44m
3;
5) inject displacement fluid, described displacement fluid is active water, and it is 4m that active water injects discharge capacity
3/ min, active water injection rate 10m
3;
6) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
7) inject gel breaker, described gel breaker is oxidants product, and it is 5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 115m
3;
8) inject displacement fluid, it is 4m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 40m
3.
Embodiment 10
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 1m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min, load fluid injection rate 5m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min, active water injection rate 5m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, described gel breaker is oxidants product, and it is 0.5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 5m
3;
6) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 5m
3.
Embodiment 11
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 10m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 500m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 10m that load fluid injects discharge capacity
3/ min, load fluid injection rate 500m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 10m that active water injects discharge capacity
3/ min, active water injection rate 500m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, described gel breaker is oxidants product, and it is 10m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 500m
3;
6) inject displacement fluid, it is 10m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 500m
3.
Embodiment 12
The method that in a kind of cbm development based under the broken glue of low temperature in the present embodiment, guanidine glue laminated is split, it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 4m that viscous liquid injects discharge capacity
3/ min, viscous liquid injection rate 44m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 4m that load fluid injects discharge capacity
3/ min, load fluid injection rate 56m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 4m that active water injects discharge capacity
3/ min, active water injection rate 12m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, described gel breaker is oxidants product, and it is 5m that gel breaker injects discharge capacity
3/ min, gel breaker injection rate 120m
3;
6) inject displacement fluid, it is 4m that displacement fluid injects discharge capacity
3/ min, displacement fluid injection rate 32m
3.
Gel breaker in above-described embodiment is that oxidants product can also replace with acidification of oil field series products.
Claims (5)
1. the method that in the cbm development based under the broken glue of low temperature, guanidine glue laminated is split, is characterized in that: it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 0.5m that pre-prepad fluid injects discharge capacity
3/ min～10m
3/ min, pre-prepad fluid injection rate is 5m
3～500m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
6) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
2. the method that in the cbm development based under the broken glue of low temperature, guanidine glue laminated is split, is characterized in that: it comprises the following steps:
1) injecting pre-prepad fluid, is active water Injection Well under by pump by pre-prepad fluid to the extraction well that completes drilling well, makes generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, and it is 0.5m that pre-prepad fluid injects discharge capacity
3/ min～10m
3/ min, pre-prepad fluid injection rate is 5m
3～500m
3;
2) inject prepad fluid, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min～10m
3/ min, viscous liquid injection rate 1m
3～500m
3;
3) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
4) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
5) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
6) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
7) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
3. the method that in the cbm development based under the broken glue of low temperature, guanidine glue laminated is split, is characterized in that: it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min～10m
3/ min, viscous liquid injection rate 1m
3～500m
3;
2) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 1m
3～500m
3;
3) inject insulating liquid, described insulating liquid is active water, and it is 0.5m that insulating liquid injects discharge capacity
3/ min～10m
3/ min, insulating liquid injection rate 0.5m
3～500m
3;
4) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
5) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
6) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
7) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
8) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
4. the method that in the cbm development based under the broken glue of low temperature, guanidine glue laminated is split, is characterized in that: it comprises the following steps:
1) inject prepad fluid, to the extraction well that completes drilling well by pump by under prepad fluid Injection Well, make generation crack, coal seam, injection pressure ﹥ coal seam fracture pressure, described prepad fluid is viscous liquid, and the viscosity of viscous liquid is 5～500mPa.s, and it is 0.5m that viscous liquid injects discharge capacity
3/ min～10m
3/ min, viscous liquid injection rate 1m
3～500m
3;
2) inject load fluid, the average sand ratio of load fluid is more than 10%, and it is 0.5m that load fluid injects discharge capacity
3/ min～10m
3/ min, load fluid injection rate 5m
3～500m
3;
3) inject displacement fluid, described displacement fluid is active water, and it is 0.5m that active water injects discharge capacity
3/ min～10m
3/ min, active water injection rate 5m
3～500m
3;
4) termination of pumping, surveys coal seam pressure drop, and the termination of pumping time is more than 10min;
5) inject gel breaker, it is 0.5m that gel breaker injects discharge capacity
3/ min～10m
3/ min, gel breaker injection rate 5m
3～500m
3;
6) inject displacement fluid, it is 0.5m that displacement fluid injects discharge capacity
3/ min～10m
3/ min, displacement fluid injection rate 5m
3～500m
3.
5. the method that in a kind of cbm development based under the broken glue of low temperature according to claim 3, guanidine glue laminated is split, is characterized in that: described gel breaker is any one in acidifying series products of oxidants product or oil field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310512525.9A CN103573244A (en) | 2013-10-25 | 2013-10-25 | Method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310512525.9A CN103573244A (en) | 2013-10-25 | 2013-10-25 | Method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103573244A true CN103573244A (en) | 2014-02-12 |
Family
ID=50045886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310512525.9A Pending CN103573244A (en) | 2013-10-25 | 2013-10-25 | Method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103573244A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953324A (en) * | 2014-04-29 | 2014-07-30 | 惠建龙 | Fracture height-adjustable acid fracturing method adopting polyatomic acid and steering acid |
| CN104088616A (en) * | 2014-07-09 | 2014-10-08 | 中国科学院武汉岩土力学研究所 | Coal bed methane hydrofracture method |
| CN106368733A (en) * | 2016-10-21 | 2017-02-01 | 山东科技大学 | Gas-bearing coal mass hydrofracture and acidification combined strengthening anti-reflection assessment method |
| CN108373913A (en) * | 2018-01-23 | 2018-08-07 | 中国石油天然气股份有限公司 | Chemical heat production efficient gel breaking method used in oil-gas well fracturing process |
| CN108868871A (en) * | 2018-05-18 | 2018-11-23 | 河南能源化工集团研究总院有限公司 | Stress Fast-Balance method after hydraulic flushing in hole |
| CN115045645A (en) * | 2022-05-26 | 2022-09-13 | 西南石油大学 | A process for increasing the effective stimulation volume of ultra-deep high-temperature fractured reservoirs |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078343A (en) * | 2007-07-06 | 2007-11-28 | 郝东 | Fracturing technique for relieving fracturing fluid pollution |
| CN101173603A (en) * | 2006-04-13 | 2008-05-07 | 施蓝姆伯格技术公司 | Sub-surface coalbed methane well enhancement through rapid oxidation |
| CN102287176A (en) * | 2011-05-09 | 2011-12-21 | 河南理工大学 | Coal bed pressing crack liquid system |
| CN102852503A (en) * | 2012-06-04 | 2013-01-02 | 北京九尊能源技术股份有限公司 | Low-temperature coal-layer fracturing fluid composite gel breaking process |
-
2013
- 2013-10-25 CN CN201310512525.9A patent/CN103573244A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173603A (en) * | 2006-04-13 | 2008-05-07 | 施蓝姆伯格技术公司 | Sub-surface coalbed methane well enhancement through rapid oxidation |
| CN101078343A (en) * | 2007-07-06 | 2007-11-28 | 郝东 | Fracturing technique for relieving fracturing fluid pollution |
| CN101333922A (en) * | 2007-07-06 | 2008-12-31 | 郝东 | Fracturing process for removing breakdown fluid contamination |
| CN102287176A (en) * | 2011-05-09 | 2011-12-21 | 河南理工大学 | Coal bed pressing crack liquid system |
| CN102852503A (en) * | 2012-06-04 | 2013-01-02 | 北京九尊能源技术股份有限公司 | Low-temperature coal-layer fracturing fluid composite gel breaking process |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953324A (en) * | 2014-04-29 | 2014-07-30 | 惠建龙 | Fracture height-adjustable acid fracturing method adopting polyatomic acid and steering acid |
| CN103953324B (en) * | 2014-04-29 | 2016-08-31 | 惠建龙 | Polynary turn to acid adjustable slit height acidifying fracturing process |
| CN104088616A (en) * | 2014-07-09 | 2014-10-08 | 中国科学院武汉岩土力学研究所 | Coal bed methane hydrofracture method |
| CN104088616B (en) * | 2014-07-09 | 2017-12-05 | 中国科学院武汉岩土力学研究所 | A kind of coal bed gas hydraulic fracturing method |
| CN106368733A (en) * | 2016-10-21 | 2017-02-01 | 山东科技大学 | Gas-bearing coal mass hydrofracture and acidification combined strengthening anti-reflection assessment method |
| CN106368733B (en) * | 2016-10-21 | 2017-08-11 | 山东科技大学 | A kind of coal seam with gas hydraulic fracturing is with being acidified combined reinforced anti-reflection appraisal procedure |
| CN108373913A (en) * | 2018-01-23 | 2018-08-07 | 中国石油天然气股份有限公司 | Chemical heat production efficient gel breaking method used in oil-gas well fracturing process |
| CN108868871A (en) * | 2018-05-18 | 2018-11-23 | 河南能源化工集团研究总院有限公司 | Stress Fast-Balance method after hydraulic flushing in hole |
| CN108868871B (en) * | 2018-05-18 | 2024-03-29 | 河南能源化工集团研究总院有限公司 | Method for quickly balancing stress after hydraulic punching |
| CN115045645A (en) * | 2022-05-26 | 2022-09-13 | 西南石油大学 | A process for increasing the effective stimulation volume of ultra-deep high-temperature fractured reservoirs |
| CN115045645B (en) * | 2022-05-26 | 2023-08-25 | 西南石油大学 | Technology for improving effective reconstruction volume of ultra-deep high Wen Liefeng reservoir |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103573244A (en) | Method for fracturing guanidine gum in coal bed gas development based on low-temperature gum breaking | |
| CN102913221B (en) | Volume transformation process of low permeability reservoir | |
| CN101787864B (en) | Water plugging method for fractured water-flooded oil well for water injection development of oil reservoir in low-permeability reservoir | |
| CN105114038B (en) | A kind of system and method for improving the old dead zone coal bed gas extraction amount of ground well drainage | |
| CN104963672B (en) | Reservoir stratum transformation method for forming seam net by temporarily blocking blast holes with clean steering materials | |
| CN102080526A (en) | Method for extracting gas from bedding level fractured well of ground coal seam roof | |
| CN106089166A (en) | A CO2 foam huff and puff method for enhanced recovery in tight oil reservoirs | |
| CN112727535A (en) | Liquid CO2Coal body cracking and permeability increasing method with cooperative drilling and water filling | |
| CN109025940B (en) | CO for tight oil reservoir2Fracturing oil displacement integrated oil extraction method | |
| CN105888641A (en) | Carbon dioxide-anti-drag water compound fracturing method | |
| CN106801597A (en) | Heavy crude reservoir combined type flooding method and displacement composition | |
| CN204140038U (en) | A kind of gaseous carbon dioxide injects displacement of reservoir oil equipment continuously | |
| CN106837274A (en) | Method for injecting oil displacement agent into oil layer by fracturing to improve recovery ratio | |
| CN109751027B (en) | Fracturing method for normal-pressure shale gas horizontal well | |
| CN104481462A (en) | Coal-bed gas aging well production capacity increasing method | |
| CN102926701B (en) | Continuous mixed type water plugging process method | |
| CN105317417A (en) | Fracturing method for medium-high-order coal bed gas reservoir | |
| CN108729893A (en) | A kind of foam composite cold mining method improving recovery factor of heavy oil reservoir | |
| CN103628846A (en) | Method for improving CO2 displacement efficiency of low-permeability reservoir | |
| CN104895538A (en) | A method for increasing the strongly water-sensitive heavy oil reservoir recovery ratio | |
| CN106522906B (en) | Application of Welan Gum in Enhanced Oil Recovery in Ultra-high Temperature Reservoir Flooding | |
| CN109356558B (en) | Single-well multi-oil-layer plane branch multi-crack fracturing process | |
| CN105134151B (en) | Hot nitrogen energization Viscosity Reduction And Stimulation | |
| CN103215022B (en) | Low-friction liquid for volume fracture | |
| CN105089573A (en) | Mining method for improving oil displacement efficiency of matrix and micro-fracture by dual-medium reservoir gas injection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140212 |