CN104594870A - Fracturing production increasing method - Google Patents
Fracturing production increasing method Download PDFInfo
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- CN104594870A CN104594870A CN201410797617.0A CN201410797617A CN104594870A CN 104594870 A CN104594870 A CN 104594870A CN 201410797617 A CN201410797617 A CN 201410797617A CN 104594870 A CN104594870 A CN 104594870A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 69
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000004576 sand Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 25
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 238000011084 recovery Methods 0.000 abstract description 15
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 abstract 1
- 238000004132 cross linking Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 20
- 238000011010 flushing procedure Methods 0.000 description 12
- 230000000903 blocking effect Effects 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 235000015111 chews Nutrition 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a fracturing production increasing method, which comprises the following steps: step one, putting a fracturing pipe column into a stratum where old cracks are located, performing hydraulic fracturing on a perforation section of the stratum, and opening the old cracks; step two, using a propping agent, a sand plug and a temporary plugging agent to shield and temporarily plug the old cracks to form main cracks and branch cracks; thirdly, throwing a ball to knock off a sliding sleeve restrictor on the fracturing string; and fourthly, propping the branch cracks by using slickwater to carry the propping agent, and propping the main cracks by using the base fluid and the cross-linking fluid to carry the propping agent respectively. The fracturing production increasing method provided by the invention is a fracturing production increasing method for improving the recovery ratio of an old oil field by replacing an encryption well, realizes the utilization and excavation of residual oil in the lateral direction of an old fracture, increases the recoverable reserve, increases the modification volume of a reservoir and improves the recovery ratio of the reservoir of the old oil field.
Description
Technical field
The invention belongs to petroleum production engineering technical field, be specifically related to the fracturing yield increasing method that a kind of alternative infill well improves old filed recovery ratio.
Background technology
In recent years, along with the progress of fracturing technique, domestic a large amount of low permeability reservoir, compact reservoir obtain effective exploitation, but along with the prolongation of oil development time, affect by factors such as operation fracturing artificial slit, reservoir heterogeneities, the remaining oil around old man-made fracture is plucked out of in a large number, and the remaining oil of its crack side direction is difficult to employ, cause oil well well yield to decline, a large amount of remaining oil is trapped in reservoir.
The method employing reservoir remaining oil at present both at home and abroad is mainly passed through reservoir residual oil analysis and Analysis results of numerical simulation, on the basis of old well pattern, rearrange infill well, by reducing single well-controlled reservoir, reach and improve injection-production relation, improve remaining oil producing degree, increase the object of recoverable reserves.
Mainly there is following problem in the above-mentioned existing method realizing hyposmosis old filed raising recovery ratio: on the basis of old well pattern, rearranges infill well, change old well pattern form and specification, simultaneously because oil field enters mid-later development phase, oil water relation is complicated, there is the risk of infill well water breakthrough or water outlet.
Summary of the invention
The object of this invention is to provide a kind of fracturing yield increasing method, avoid existing on the basis of old well pattern, rearrange infill well water breakthrough that infill well brings or go out water problem, utilizing and open old crack, around old crack, form new major fracture and a crack, improve the recovery ratio of reservoir.
For this reason, the invention provides a kind of fracturing yield increasing method, comprise the steps:
Step one, will enter under fracturing string in the stratum at place, old crack, and the perforated interval of formation carries out fracturing, opens old crack;
Step 2, utilizes proppant, sand plug, diverting agent to carry out shielding to old crack stifled temporarily, forms major fracture and a crack; Add in old crack and, according to mass fraction shielding is carried out to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent;
Step 3, the sliding sleeve throttling device on fracturing string is destroyed in pitching;
Step 4, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture; Proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.
The particle diameter of the proppant in described step 2 is 8 order ~ 16 orders, and diverting agent is CDD-3 oil-soluble crack diverting agent, and particle diameter is 3mm ~ 6mm.
In described step 4, the particle diameter of the proppant that slippery water carries is 40 order ~ 70 orders, and the particle diameter of the proppant that base fluid, crosslinked fluid carry is 20 order ~ 40 orders.
Described slippery water adopts EM-30 type slippery water.
Described base fluid adopts CJ2-6 type base fluid.
Described crosslinked fluid adopts JL-13 type crosslinked fluid.
The sliding sleeve throttling device of described step 3 adopts HT-J-CQ sliding sleeve throttling device.
Beneficial effect of the present invention: this fracturing yield increasing method provided by the invention, concrete, it is the fracturing yield increasing method that alternative infill well improves old filed recovery ratio, achieve employing and taping the latent power of old crack side direction remaining oil, add recoverable reserves, too increase the transformation volume of reservoir simultaneously, improve the reservoir recovery ratio of old filed.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of fracturing string.
Description of reference numerals: 1, fracturing string; 2, packer; 3, sliding sleeve throttling device.
Detailed description of the invention
embodiment 1:
A kind of fracturing yield increasing method, comprises the steps:
Step one, entered in the stratum at place, old crack for 1 time by fracturing string, and the perforated interval of formation carries out fracturing, opens old crack;
Step 2, utilizes proppant, sand plug, diverting agent to carry out shielding to old crack stifled temporarily, forms major fracture and a crack; Add in old crack and, according to mass fraction shielding is carried out to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent;
Step 3, the sliding sleeve throttling device 3 on fracturing string 1 is destroyed in pitching;
Step 4, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture; Proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.
Before this fracturing yield increasing method of enforcement, need the flow string first tripping out former well, and sting wash clean, then drift size gauge tool drifting is used, namely use drift size gauge tool drifting to the artificial bottom of a well of well in operation, guarantee that described well in operation pit shaft is clean, like this, whether standard is met by the internal diameter of drift size gauge tool Inspection well, if well in operation has distortion or blocking, then check the biggest size of element that distortion or the well in operation after blocking can pass through, if the biggest size of element that can pass through does not meet pressure break requirement, then first well workover implements pressure break again; Then well-flushing, adopts the active water with reservoir compatibility, returns well-flushing to former pit shaft, returns out flushing fluid content of impurities and is less than 0.2% for qualified, and again tag in fact; Engineering log, casing pressure test, carry out engineering log to full well section, if sleeve pipe is without breakage, then adopts casing pressure test drilling tool to carry out pressure testing to full casing, after pressure testing is qualified to 30MPa, trip out tubing string, carry out lower step measure, if the unsuccessful stopping construction of pressure testing, selects well again, until select well success; According to step one to step 4 pressing crack construction; Closing well, open flow.
Concrete, as shown in Figure 1, fracturing string 1 in step one is connected with packer 2 and sliding sleeve throttling device 3, wherein, sliding sleeve throttling device 3 is selected is furnished with the sliding sleeve throttling device 3 that ∮ 22mm directly chews son, K344-98 packer 2 selected by packer 2, K344 series packer 2 supports the use with sliding sleeve throttling device 3, and K344 series packer 2 in the course of the work, without the need to mechanical movement, therefore preferably K344 series packer 2, as the packer 2 in the present invention, utilizes above-mentioned fracturing string 1 to realize implementing oil jacket with noting fracturing to the perforated interval on stratum, place, old crack;
Step 2, adds and, according to mass fraction is carried out shielding to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent in old crack; Namely proppant, sand plug, diverting agent is utilized to carry out shielding to old crack stifled temporarily, impel old crack to stitch interior static pressure to improve, realization presses off the new crack of side direction, form major fracture and a crack, and make major fracture and a fracture extension, wherein, shielding is stifled temporarily to be referred to because solid phase particles in mud can not be eliminated, formation positive differential pressure is inevitable, the infringement blocking objective reality of formation.So people's imagination utilizes solid phase particle to the blocking mechanism of oil reservoir pore throat and rule, artificially when opening oil reservoir, quick on the oil reservoir borehole wall, shallow-layer, effectively formation one infringement blocking strips, reaching with this stops mud to damage the continuation of oil reservoir, eliminate the impact of soak time, and eliminate the object of the infringement of cement paste.As approach of technology innovation, invent temporary shielding method ,barrier building temporary seal incores.The permeability of infringement band reduces with the increase of temperature and pressure, because infringement band is very thin, so by perforating methods causing two of formation damage factors that cannot eliminate: positive differential pressure and solid phase particles, convert the necessary condition and favorable factor that realize this technology to, thus fundamentally (in mechanism) solves this domestic and international unsolved technical barrier always.The effect of this infringement band is equivalent to " mask tape " that stop infringement further, therefore this technology is called the Shielding Temporary Plugging Technology of modification drilling fluid;
The sliding sleeve throttling device 3 on fracturing string 1 is destroyed in pitching in step 3, it should be noted that, the mode of destroying sliding sleeve throttling device 3 is accurately that after carrying out pressure break to old crack, pressure break discharge capacity is by 1.6m
3/ min ~ 2.4m
3/ min is down to 0.5m
3/ min, open the high pressure line plug valve pitching on fracturing string 1, this high pressure line plug valve pitching is the solid steel ball of φ 38mm, namely destroys sliding sleeve throttling device 3, falls into shaft bottom, and then improves discharge capacity, realizes oil jacket with note, when discharge capacity is greater than 6m
3during/min, step 4 can be carried out;
Step 4, proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.Namely utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, before implementation step four, need calculate according to reservoir intrinsic fracture opening pressure, if calculation of pressure result is 1.8MPa ~ 3.0MPa, and reach the discharge capacity of required net pressure requirement in the seam of old crack simultaneously, namely discharge capacity is greater than 6m
3during/min, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, thus make the complex fracture system (major fracture and a crack) formed in reservoir can realize effective support.Adopt down-hole micro-seismic monitoring means, Real-Time Monitoring fracture propagation rule and form simultaneously, make crack bandwidth, belt length extends to termination of pumping after designing requirement.
This fracturing yield increasing method provided by the invention, concrete, it is the fracturing yield increasing method that alternative infill well improves old filed recovery ratio, achieve employing and taping the latent power of old crack side direction remaining oil, add recoverable reserves, too increase the transformation volume of reservoir simultaneously, improve the reservoir recovery ratio of old filed.
embodiment 2:
On the basis of embodiment 1, concrete, the particle diameter of the proppant in step 2 is 8 order ~ 16 orders, and diverting agent is CDD-3 oil-soluble crack diverting agent, and particle diameter is 3mm ~ 6mm, and the density of CDD-3 oil-soluble crack diverting agent is 1.30 ± 0.20g/cm
3, softening temperature:>=30 DEG C, dissolution time (40 DEG C): < 90min.
Before this fracturing yield increasing method of enforcement, need the flow string first tripping out former well, and sting wash clean, then drift size gauge tool drifting is used, namely use drift size gauge tool drifting to the artificial bottom of a well of well in operation, guarantee that described well in operation pit shaft is clean, like this, whether standard is met by the internal diameter of drift size gauge tool Inspection well, if well in operation has distortion or blocking, then check the biggest size of element that distortion or the well in operation after blocking can pass through, if the biggest size of element that can pass through does not meet pressure break requirement, then first well workover implements pressure break again; Then well-flushing, adopts the active water with reservoir compatibility, returns well-flushing to former pit shaft, returns out flushing fluid content of impurities and is less than 0.2% for qualified, and again tag in fact; Engineering log, casing pressure test, carry out engineering log to full well section, if sleeve pipe is without breakage, then adopts casing pressure test drilling tool to carry out pressure testing to full casing, after pressure testing is qualified to 30MPa, trip out tubing string, carry out lower step measure, if the unsuccessful stopping construction of pressure testing, selects well again, until select well success; According to step one to step 4 pressing crack construction; Closing well, open flow.
Concrete, fracturing string 1 in step one is connected with packer 2 and sliding sleeve throttling device 3, wherein, sliding sleeve throttling device 3 is selected is furnished with the sliding sleeve throttling device 3 that ∮ 22mm directly chews son, K344-98 packer 2 selected by packer 2, K344 series packer 2 supports the use with sliding sleeve throttling device 3, and K344 series packer 2 in the course of the work, without the need to mechanical movement, therefore preferably K344 series packer 2, as the packer 2 in the present invention, utilizes above-mentioned fracturing string 1 to realize implementing oil jacket with noting fracturing to the perforated interval on stratum, place, old crack;
Step 2, adds and, according to mass fraction is carried out shielding to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent in old crack; Namely proppant, sand plug, diverting agent is utilized to carry out shielding to old crack stifled temporarily, impel old crack to stitch interior static pressure to improve, realization presses off the new crack of side direction, form major fracture and a crack, and make major fracture and a fracture extension, wherein, the particle diameter of proppant is 8 order ~ 16 orders, diverting agent is CDD-3 oil-soluble crack diverting agent, and particle diameter is 3mm ~ 6mm, and the density of CDD-3 oil-soluble crack diverting agent is 1.30 ± 0.20g/cm
3, softening temperature:>=30 DEG C, dissolution time (40 DEG C): < 90min;
The sliding sleeve throttling device 3 on fracturing string 1 is destroyed in pitching in step 3, it should be noted that, the mode of destroying sliding sleeve throttling device 3 is accurately that after carrying out pressure break to old crack, pressure break discharge capacity is by 1.6m
3/ min ~ 2.4m
3/ min is down to 0.5m
3/ min, open the high pressure line plug valve pitching on fracturing string 1, this high pressure line plug valve pitching is the solid steel ball of φ 38mm, namely destroys sliding sleeve throttling device 3, falls into shaft bottom, and then improves discharge capacity, realizes oil jacket with note, when discharge capacity is greater than 6m
3during/min, step 4 can be carried out;
Step 4, proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.Namely utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, before implementation step four, need calculate according to reservoir intrinsic fracture opening pressure, if calculation of pressure result is 1.8MPa ~ 3.0MPa, and reach the discharge capacity of required net pressure requirement in the seam of old crack simultaneously, namely discharge capacity is greater than 6m
3during/min, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, thus make the complex fracture system (major fracture and a crack) formed in reservoir can realize effective support.Adopt down-hole micro-seismic monitoring means, Real-Time Monitoring fracture propagation rule and form simultaneously, make crack bandwidth, belt length extends to termination of pumping after designing requirement.
This fracturing yield increasing method provided by the invention, concrete, it is the fracturing yield increasing method that alternative infill well improves old filed recovery ratio, achieve employing and taping the latent power of old crack side direction remaining oil, add recoverable reserves, too increase the transformation volume of reservoir simultaneously, improve the reservoir recovery ratio of old filed.
embodiment 3:
On the basis of embodiment 2, it should be noted that, in step 4, the particle diameter of the proppant that slippery water carries is 40 order ~ 70 orders, and the particle diameter of the proppant that base fluid, crosslinked fluid carry is 20 order ~ 40 orders.
Before this fracturing yield increasing method of enforcement, need the flow string first tripping out former well, and sting wash clean, then drift size gauge tool drifting is used, namely use drift size gauge tool drifting to the artificial bottom of a well of well in operation, guarantee that described well in operation pit shaft is clean, like this, whether standard is met by the internal diameter of drift size gauge tool Inspection well, if well in operation has distortion or blocking, then check the biggest size of element that distortion or the well in operation after blocking can pass through, if the biggest size of element that can pass through does not meet pressure break requirement, then first well workover implements pressure break again; Then well-flushing, adopts the active water with reservoir compatibility, returns well-flushing to former pit shaft, returns out flushing fluid content of impurities and is less than 0.2% for qualified, and again tag in fact; Engineering log, casing pressure test, carry out engineering log to full well section, if sleeve pipe is without breakage, then adopts casing pressure test drilling tool to carry out pressure testing to full casing, after pressure testing is qualified to 30MPa, trip out tubing string, carry out lower step measure, if the unsuccessful stopping construction of pressure testing, selects well again, until select well success; According to step one to step 4 pressing crack construction; Closing well, open flow.
Concrete, fracturing string 1 in step one is connected with packer 2 and sliding sleeve throttling device 3, wherein, sliding sleeve throttling device 3 is selected is furnished with the sliding sleeve throttling device 3 that ∮ 22mm directly chews son, K344-98 packer 2 selected by packer 2, K344 series packer 2 supports the use with sliding sleeve throttling device 3, and K344 series packer 2 in the course of the work, without the need to mechanical movement, therefore preferably K344 series packer 2, as the packer 2 in the present invention, utilizes above-mentioned fracturing string 1 to realize implementing oil jacket with noting fracturing to the perforated interval on stratum, place, old crack;
Step 2, adds and, according to mass fraction is carried out shielding to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent in old crack; Namely proppant, sand plug, diverting agent is utilized to carry out shielding to old crack stifled temporarily, impel old crack to stitch interior static pressure to improve, realization presses off the new crack of side direction, form major fracture and a crack, and make major fracture and a fracture extension, wherein, the particle diameter of proppant is 8 order ~ 16 orders, diverting agent is CDD-3 oil-soluble crack diverting agent, and particle diameter is 3mm ~ 6mm, and the density of CDD-3 oil-soluble crack diverting agent is 1.30 ± 0.20g/cm
3, softening temperature:>=30 DEG C, dissolution time (40 DEG C): < 90min;
The sliding sleeve throttling device 3 on fracturing string 1 is destroyed in pitching in step 3, it should be noted that, the mode of destroying sliding sleeve throttling device 3 is accurately that after carrying out pressure break to old crack, pressure break discharge capacity is by 1.6m
3/ min ~ 2.4m
3/ min is down to 0.5m
3/ min, open the high pressure line plug valve pitching on fracturing string 1, this high pressure line plug valve pitching is the solid steel ball of φ 38mm, namely destroys sliding sleeve throttling device 3, falls into shaft bottom, and then improves discharge capacity, realizes oil jacket with note, when discharge capacity is greater than 6m
3during/min, step 4 can be carried out;
Step 4, proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.Namely utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, wherein, the particle diameter of the proppant that slippery water carries is 40 order ~ 70 orders, and the particle diameter of the proppant that base fluid, crosslinked fluid carry is 20 order ~ 40 orders, before implementation step four, need calculate according to reservoir intrinsic fracture opening pressure, if calculation of pressure result is 1.8MPa ~ 3.0MPa, and reach the discharge capacity of required net pressure requirement in the seam of old crack, namely discharge capacity is greater than 6m simultaneously
3during/min, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, thus make the complex fracture system (major fracture and a crack) formed in reservoir can realize effective support.Adopt down-hole micro-seismic monitoring means, Real-Time Monitoring fracture propagation rule and form simultaneously, make crack bandwidth, belt length extends to termination of pumping after designing requirement.
This fracturing yield increasing method provided by the invention, concrete, it is the fracturing yield increasing method that alternative infill well improves old filed recovery ratio, achieve employing and taping the latent power of old crack side direction remaining oil, add recoverable reserves, too increase the transformation volume of reservoir simultaneously, improve the reservoir recovery ratio of old filed.
embodiment 4:
On the basis of embodiment 3, further, described slippery water adopts EM-30 type slippery water, and described base fluid adopts CJ2-6 type base fluid, described crosslinked fluid adopts JL-13 type crosslinked fluid, and the sliding sleeve throttling device 3 of described step 3 adopts HT-J-CQ sliding sleeve throttling device 3.
Before this fracturing yield increasing method of enforcement, need the flow string first tripping out former well, and sting wash clean, then drift size gauge tool drifting is used, namely use drift size gauge tool drifting to the artificial bottom of a well of well in operation, guarantee that described well in operation pit shaft is clean, like this, whether standard is met by the internal diameter of drift size gauge tool Inspection well, if well in operation has distortion or blocking, then check the biggest size of element that distortion or the well in operation after blocking can pass through, if the biggest size of element that can pass through does not meet pressure break requirement, then first well workover implements pressure break again; Then well-flushing, adopts the active water with reservoir compatibility, returns well-flushing to former pit shaft, returns out flushing fluid content of impurities and is less than 0.2% for qualified, and again tag in fact; Engineering log, casing pressure test, carry out engineering log to full well section, if sleeve pipe is without breakage, then adopts casing pressure test drilling tool to carry out pressure testing to full casing, after pressure testing is qualified to 30MPa, trip out tubing string, carry out lower step measure, if the unsuccessful stopping construction of pressure testing, selects well again, until select well success; According to step one to step 4 pressing crack construction; Closing well, open flow.
Concrete, fracturing string 1 in step one is connected with packer 2 and sliding sleeve throttling device 3, wherein, sliding sleeve throttling device 3 is selected is furnished with the sliding sleeve throttling device 3 that ∮ 22mm directly chews son, K344-98 packer 2 selected by packer 2, K344 series packer 2 supports the use with sliding sleeve throttling device 3, and K344 series packer 2 in the course of the work, without the need to mechanical movement, therefore preferably K344 series packer 2, as the packer 2 in the present invention, utilizes above-mentioned fracturing string 1 to realize implementing oil jacket with noting fracturing to the perforated interval on stratum, place, old crack;
Step 2, adds and, according to mass fraction is carried out shielding to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent in old crack; Namely proppant, sand plug, diverting agent is utilized to carry out shielding to old crack stifled temporarily, impel old crack to stitch interior static pressure to improve, realization presses off the new crack of side direction, form major fracture and a crack, and make major fracture and a fracture extension, wherein, the particle diameter of proppant is 8 order ~ 16 orders, diverting agent is CDD-3 oil-soluble crack diverting agent, and particle diameter is 3mm ~ 6mm, and the density of CDD-3 oil-soluble crack diverting agent is 1.30 ± 0.20g/cm
3, softening temperature:>=30 DEG C, dissolution time (40 DEG C): < 90min;
The sliding sleeve throttling device 3 on fracturing string 1 is destroyed in pitching in step 3, it should be noted that, sliding sleeve throttling device 3 adopts HT-J-CQ sliding sleeve throttling device 3, and the mode of destroying sliding sleeve throttling device 3 is accurately that after carrying out pressure break to old crack, pressure break discharge capacity is by 1.6m
3/ min ~ 2.4m
3/ min is down to 0.5m
3/ min, open the high pressure line plug valve pitching on fracturing string 1, this high pressure line plug valve pitching is the solid steel ball of φ 38mm, namely destroys sliding sleeve throttling device 3, falls into shaft bottom, and then improves discharge capacity, realizes oil jacket with note, when discharge capacity is greater than 6m
3during/min, step 4 can be carried out;
Step 4, proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.Namely utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carries proppant respectively and supports major fracture, wherein, the particle diameter of the proppant that slippery water carries is 40 order ~ 70 orders, base fluid, the particle diameter of the proppant that crosslinked fluid carries is 20 order ~ 40 orders, slippery water adopts EM-30 type slippery water, base fluid adopts CJ2-6 type base fluid, crosslinked fluid adopts JL-13 type crosslinked fluid, before implementation step four, need calculate according to reservoir intrinsic fracture opening pressure, if calculation of pressure result is 1.8MPa ~ 3.0MPa, and reach the discharge capacity of required net pressure requirement in the seam of old crack simultaneously, namely discharge capacity is greater than 6m
3during/min, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture, thus make the complex fracture system (major fracture and a crack) formed in reservoir can realize effective support.Adopt down-hole micro-seismic monitoring means, Real-Time Monitoring fracture propagation rule and form simultaneously, make crack bandwidth, belt length extends to termination of pumping after designing requirement.
This fracturing yield increasing method provided by the invention, 33 mouthfuls of well field trials are carried out at old filed, down-hole micro-seismic monitoring shows that the more conventional pressure break of reservoir reconstruction volume increases by 148%, moisture stable or account for 69% lower than the well before measure after service shaft pressure, day oil increment be 2.29 times of conventional pressure break.It substitutes the fracturing yield increasing method that infill well improves old filed recovery ratio, achieves employing and taping the latent power of old crack side direction remaining oil, adds recoverable reserves, too increase the transformation volume of reservoir simultaneously, improve the reservoir recovery ratio of old filed.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (7)
1. a fracturing yield increasing method, is characterized in that, comprises the steps:
Step one, enter in the stratum at place, old crack, and the perforated interval of formation carries out fracturing, open old crack by under fracturing string (1);
Step 2, utilizes proppant, sand plug, diverting agent to carry out shielding to old crack stifled temporarily, forms major fracture and a crack; Add in old crack and, according to mass fraction shielding is carried out to old crack stifled temporarily than being the mixture that 5:2:1 forms, and old crack being pressed off formation major fracture and a crack by proppant, sand plug, diverting agent;
Step 3, the sliding sleeve throttling device (3) on fracturing string (1) is destroyed in pitching;
Step 4, utilize slippery water to carry proppant and support a crack, base fluid, crosslinked fluid carry proppant respectively and support major fracture; Proppant and slippery water are added a crack according to mass fraction than the mixture formed for 1:8, support a crack, proppant, base fluid are respectively added major fracture according to mass fraction than the mixture formed for 1:3 than the mixture formed for 1:5 and proppant, base fluid according to mass fraction simultaneously, support major fracture.
2. a kind of fracturing yield increasing method as claimed in claim 1, is characterized in that, the particle diameter of the proppant in described step 2 is 8 order ~ 16 orders, and diverting agent is CDD-3 oil-soluble crack diverting agent, and particle diameter is 3mm ~ 6mm.
3. a kind of fracturing yield increasing method as claimed in claim 1, is characterized in that, in described step 4, the particle diameter of the proppant that slippery water carries is 40 order ~ 70 orders, and the particle diameter of the proppant that base fluid, crosslinked fluid carry is 20 order ~ 40 orders.
4. a kind of fracturing yield increasing method as claimed in claim 3, is characterized in that, described slippery water adopts EM-30 type slippery water.
5. a kind of fracturing yield increasing method as claimed in claim 3, is characterized in that, described base fluid adopts CJ2-6 type base fluid.
6. a kind of fracturing yield increasing method as claimed in claim 3, is characterized in that, described crosslinked fluid adopts JL-13 type crosslinked fluid.
7. a kind of fracturing yield increasing method as claimed in claim 1, is characterized in that, the sliding sleeve throttling device (3) of described step 3 adopts HT-J-CQ sliding sleeve throttling device.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114050A (en) * | 2015-09-15 | 2015-12-02 | 中国石油大学(北京) | Novel fracturing pump-injection method |
| CN105201478A (en) * | 2015-09-30 | 2015-12-30 | 大庆井泰石油工程技术股份有限公司 | Oil and gas well fracture network system fracturing technology |
| CN106223922A (en) * | 2016-08-26 | 2016-12-14 | 中国石油集团川庆钻探工程有限公司 | Shale gas horizontal well proppant intra-seam shielding temporary plugging staged fracturing process |
| CN107558980A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN107701143A (en) * | 2016-08-09 | 2018-02-16 | 中国石油化工股份有限公司 | A kind of multi-section multi-layer sealing skill devices and methods therefor based on one-trip string |
| CN109505568A (en) * | 2018-12-27 | 2019-03-22 | 中国石油天然气股份有限公司 | Repeated transformation method for residual geological reserves for combination of same-layer driving and pressing |
| CN110805421A (en) * | 2019-11-26 | 2020-02-18 | 西南石油大学 | Shale gas pressure crack modification method for guiding temporary plugging agent addition through seismic energy monitoring |
| CN112963135A (en) * | 2021-02-07 | 2021-06-15 | 中国石油天然气股份有限公司 | Fracturing method for improving formation pressure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060157243A1 (en) * | 2005-01-14 | 2006-07-20 | Halliburton Energy Services, Inc. | Methods for fracturing subterranean wells |
| CN101158280A (en) * | 2007-01-29 | 2008-04-09 | 邹积鹏 | Oil well high water-bearing layer pressure blocking method |
| US20080236825A1 (en) * | 2007-03-26 | 2008-10-02 | Evgeny Borisovich Barmatov | Particulate Material for Proppant Flowback Control |
| CN101476452A (en) * | 2009-01-16 | 2009-07-08 | 庆阳长庆井下油田助剂有限责任公司 | Water-control fracturing yield increasing method for oil gas well |
| CN103306660A (en) * | 2012-03-13 | 2013-09-18 | 中国石油化工股份有限公司 | Shale gas reservoir hydraulic fracturing production increasing method |
| CN103615228A (en) * | 2013-11-26 | 2014-03-05 | 中国石油天然气股份有限公司 | Temporary plugging and fracturing process in degradable fiber seam |
-
2014
- 2014-12-22 CN CN201410797617.0A patent/CN104594870B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060157243A1 (en) * | 2005-01-14 | 2006-07-20 | Halliburton Energy Services, Inc. | Methods for fracturing subterranean wells |
| CN101158280A (en) * | 2007-01-29 | 2008-04-09 | 邹积鹏 | Oil well high water-bearing layer pressure blocking method |
| US20080236825A1 (en) * | 2007-03-26 | 2008-10-02 | Evgeny Borisovich Barmatov | Particulate Material for Proppant Flowback Control |
| CN101476452A (en) * | 2009-01-16 | 2009-07-08 | 庆阳长庆井下油田助剂有限责任公司 | Water-control fracturing yield increasing method for oil gas well |
| CN103306660A (en) * | 2012-03-13 | 2013-09-18 | 中国石油化工股份有限公司 | Shale gas reservoir hydraulic fracturing production increasing method |
| CN103615228A (en) * | 2013-11-26 | 2014-03-05 | 中国石油天然气股份有限公司 | Temporary plugging and fracturing process in degradable fiber seam |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114050B (en) * | 2015-09-15 | 2018-05-25 | 中国石油大学(北京) | A kind of new fracturing pump injecting method |
| CN105114050A (en) * | 2015-09-15 | 2015-12-02 | 中国石油大学(北京) | Novel fracturing pump-injection method |
| CN105201478A (en) * | 2015-09-30 | 2015-12-30 | 大庆井泰石油工程技术股份有限公司 | Oil and gas well fracture network system fracturing technology |
| CN107701143B (en) * | 2016-08-09 | 2019-08-30 | 中国石油化工股份有限公司 | A kind of multi-section multi-layer sealing skill devices and methods therefor based on one-trip string |
| CN107701143A (en) * | 2016-08-09 | 2018-02-16 | 中国石油化工股份有限公司 | A kind of multi-section multi-layer sealing skill devices and methods therefor based on one-trip string |
| CN106223922A (en) * | 2016-08-26 | 2016-12-14 | 中国石油集团川庆钻探工程有限公司 | Shale gas horizontal well proppant intra-seam shielding temporary plugging staged fracturing process |
| CN106223922B (en) * | 2016-08-26 | 2020-06-26 | 中国石油集团川庆钻探工程有限公司 | Shale gas horizontal well proppant intra-seam shielding temporary plugging staged fracturing process |
| CN107558980B (en) * | 2017-07-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN107558980A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN109505568A (en) * | 2018-12-27 | 2019-03-22 | 中国石油天然气股份有限公司 | Repeated transformation method for residual geological reserves for combination of same-layer driving and pressing |
| CN110805421A (en) * | 2019-11-26 | 2020-02-18 | 西南石油大学 | Shale gas pressure crack modification method for guiding temporary plugging agent addition through seismic energy monitoring |
| CN110805421B (en) * | 2019-11-26 | 2021-05-18 | 西南石油大学 | Shale gas pressure crack modification method for guiding temporary plugging agent addition through seismic energy monitoring |
| CN112963135A (en) * | 2021-02-07 | 2021-06-15 | 中国石油天然气股份有限公司 | Fracturing method for improving formation pressure |
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