CN110130867B - Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well - Google Patents
Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well Download PDFInfo
- Publication number
- CN110130867B CN110130867B CN201910304847.1A CN201910304847A CN110130867B CN 110130867 B CN110130867 B CN 110130867B CN 201910304847 A CN201910304847 A CN 201910304847A CN 110130867 B CN110130867 B CN 110130867B
- Authority
- CN
- China
- Prior art keywords
- fracturing
- cluster
- horizontal well
- small
- bridge plug
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000010276 construction Methods 0.000 claims abstract description 69
- 230000000903 blocking effect Effects 0.000 claims abstract description 64
- 239000002245 particle Substances 0.000 claims abstract description 56
- 238000005553 drilling Methods 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000004576 sand Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 238000011001 backwashing Methods 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000009096 changqing Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E21B33/134—Bridging plugs
-
- 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the steps of determining the number of fracturing segments and perforating positions according to reservoir conditions, completing first-segment multi-cluster fracturing by adopting multi-cluster perforation in each segment, then realizing second-segment and later multi-segment sectional fracturing by hydraulically pumping a small-diameter soluble bridge plug, wherein soluble temporary blocking diverting particles are pumped in the fracturing construction process to block the clusters which are already fractured, so that fracturing fluid is forced to enter the clusters which are not fractured, thereby realizing the effective fracturing of the clusters in the segments, after the fracturing construction is completed, the small-diameter soluble bridge plug and the temporary blocking diverting particles are automatically dissolved under the stratum condition, the transformation effect is not influenced, the steps are repeated until the fracturing of all the segments of the slim hole sidetracking horizontal well is completed, the problems of complicated construction process of the small-diameter fishing type bridge plug and low opening rate of all clusters in cage fracturing can be solved, and the invention has the advantages of no plugging, no drilling and low opening rate of each cluster, The method has the characteristics of high construction efficiency and low cost, and realizes the purpose of sectional multi-cluster fracturing of the slim-hole sidetracking horizontal well.
Description
Technical Field
The invention belongs to the field of oilfield fracturing, and particularly relates to a sectional multi-cluster fracturing method for a slim-hole sidetracking horizontal well, which is suitable for 31/2"lateral drilling of horizontal well with small borehole for cementing completion of tubing (inner diameter 76 mm).
Background
The fracturing is an important way for modifying a reservoir of a low-permeability oil and gas reservoir and realizing benefit development, and the temporary plugging and steering fracturing technology can plug an original crack, realize crack steering and form a new crack, so that a complex crack network system is formed, the drainage area of a gas well is increased, and the purpose of increasing the yield of the gas well is realized.
The old well sidetrack is an effective technical means for digging residual oil and treating low-yield and long-stop wells, is widely applied at home and abroad, and an ultra-low permeability reservoir represented by Ansai and Jingan enters a double-high development stage after long-term water injection development, so that the dominant water drive direction is gradually formed, the number of water flooded wells is increased, and the difficulty in digging residual oil by conventional measures is high. Through investigation and demonstration in the early stage, the idea of the lateral drilling and the residual oil excavation and the recovery of the yield of the flooded well of the old well is provided, on the basis of the residual oil research of a typical well group, the lateral drilling target point position optimization, the lateral drilling well completion and the reservoir transformation technology are involved, the lateral drilling and directional well residual oil excavation technology suitable for the characteristics of the Changqing oil field is formed, the lateral drilling and directional well residual oil excavation technology is applied to the scale of the ultra-low permeability reservoirs such as Ansai and Jingan, the test effect is good, powerful support is provided for the stable production of the old area, the recovery of the flooded well and the residual oil excavation are realized on the premise of not increasing the number of wells, and the application prospect is wide.
In order to further improve the old well sidetracking residual oil excavation technical series, improve the sidetracking single well reserve control degree and single well yield, develop a sidetracking horizontal well test, compare with sidetracking directional well, increase the length of a sidetracking horizontal well slim hole well section, increase the number of fracturing modification sections, and have the problems of complex process by applying a conventional staged fracturing method, low opening rate of each cluster in general fracturing, drilling plug, low construction efficiency and high cost, therefore, the staged multi-cluster fracturing of the slim hole sidetracking horizontal well needs to be realized by technical clearance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, and overcomes the defects that in the prior art, the fracturing method comprises the following steps: the existing staged fracturing method has complex procedures, 2: the opening rate of each cluster of general fracturing is lower, influences repeated transformation effect, 3: the problems of drill plug, low construction efficiency, high cost and the like exist.
In order to solve the technical problem, the technical scheme of the invention is as follows: a sectional multi-cluster fracturing method for a slim hole sidetrack horizontal well comprises the following steps:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Preferably, the medium-diameter perforating gun cartridges in the step 3) are 60 guns, the length of a single cluster perforating hole of the first section of multi-cluster perforating is 2-5 m, and the cluster spacing is 3-6 m.
Preferably, the dissolvable temporary plugging diversion particles in the step 4) are composed of four dissolvable temporary plugging diversion particles with the particle diameters of 4mm, 3mm, 1mm and 0.5mm according to the proportion of 5%, 30%, 40% and 25% by weight, and are dissolved after 2 hours at 60 ℃, more than 70% can be dissolved after 8 hours, and the particles are completely dissolved after 24 hours.
Preferably, the diameter of the small-diameter soluble bridge plug in the step 6) is 68mm, the pressure-bearing capacity is 70MPa, the bridge plug body of the small-diameter soluble bridge plug is completely dissolved in 10 days at the temperature of 60 ℃, and the rubber cylinder of the small-diameter soluble bridge plug is completely dissolved in 27 days.
Preferably, the bridge plug tool string in the step 6) comprises a cable, a phi 54 bridle, a phi 54 magnetic locator, a conversion joint and a setting tool, wherein the lower end of the cable is connected with the phi 54 bridle, the lower end of the phi 54 bridle is connected with the phi 54 magnetic locator, the lower end of the phi 54 magnetic locator is connected with the conversion joint, the lower end of the conversion joint is connected with the setting tool, the lower end of the setting tool is connected with the small-diameter soluble bridge plug, the voltage of the direct current is 300V, and the current is 50-1000 mA.
Preferably, the diameter of the soluble ball in the step 7) is 40.6mm, and the dissolving time is 8-12 h.
Compared with the prior art, the invention has the advantages that:
(1) the invention provides a1/2"oil pipe (inner diameter 76)mm) the sectional multi-cluster fracturing method of the slim hole sidetracking horizontal well of well cementation completion, confirm fracturing segment number and perforation position according to the reservoir condition, each section adopts the multi-cluster perforation, finish the first section multi-cluster fracturing, then pump the soluble bridge plug of minor diameter through the water conservancy and realize the sectional fracturing of the second section and subsequent multistage, wherein can dissolve and temporarily block the diverting particle through pumping in the fracturing construction course, block the cluster already cracked, force the fracturing fluid to enter the cluster not cracked, realize the effective cracking of the multi-cluster in the section, after the fracturing construction is finished, the soluble bridge plug of minor diameter, temporarily block the diverting particle and dissolve by oneself under the stratum condition, do not influence and transform the effect, repeat the above-mentioned step, until finishing the fracturing of all sections of the slim hole sidetracking horizontal well;
(2) the method solves the problems that the construction process of the fishable bridge plug with the small diameter is complex and the opening rate of each cluster of the conventional fracturing is low in the prior art, and has the advantages of no plug drilling, high construction efficiency and low cost;
(3) the invention has the advantages of simple site construction, reliable plugging, obvious effect after pressing and high controllability.
Detailed Description
The following describes embodiments of the present invention with reference to examples:
it should be noted that the structures, proportions, sizes, and other embodiments disclosed herein are illustrative only and are not intended to limit the scope of the invention, which is defined by the claims, since the scope of the invention is not limited by the specific structures, proportions, and dimensions, or otherwise, unless otherwise specified, since various modifications, changes in the proportions and variations thereof, can be made by those skilled in the art without departing from the spirit and scope of the invention.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The drift size gauge, the hanger, the 1.9' oil pipe, the small-diameter perforating bullet, the single upper sealing pipe column, the packer, the soluble temporary plugging steering particle, the small-diameter soluble bridge plug, the cable, the phi 54 bridle, the phi 54 magnetic locator, the conversion joint, the setting tool and the soluble ball are all the prior art.
The residual oil distribution knowledge and the electric measurement interpretation result of the sidetracking horizontal well are the prior art.
Example 1
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Example 2
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
And (2) determining the number of fracturing sections and the perforating position of the sidetracking horizontal well of the medium and small well holes in the step 1) according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetracking horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Example 3
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Example 4
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Preferably, the medium-diameter perforating gun cartridges in the step 3) are 60 guns, the length of a single cluster perforating hole of the first section of multi-cluster perforating is 2-5 m, and the cluster spacing is 3-6 m.
Example 5
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Preferably, the medium-diameter perforating gun cartridges in the step 3) are 60 guns, the length of a single cluster perforating hole of the first section of multi-cluster perforating is 2-5 m, and the cluster spacing is 3-6 m.
Preferably, the dissolvable temporary plugging diversion particles in the step 4) are composed of four dissolvable temporary plugging diversion particles with the particle diameters of 4mm, 3mm, 1mm and 0.5mm according to the proportion of 5%, 30%, 40% and 25% by weight, and are dissolved after 2 hours at 60 ℃, more than 70% can be dissolved after 8 hours, and the particles are completely dissolved after 24 hours.
Example 6
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Preferably, the medium-diameter perforating gun cartridges in the step 3) are 60 guns, the length of a single cluster perforating hole of the first section of multi-cluster perforating is 2-5 m, and the cluster spacing is 3-6 m.
Preferably, the dissolvable temporary plugging diversion particles in the step 4) are composed of four dissolvable temporary plugging diversion particles with the particle diameters of 4mm, 3mm, 1mm and 0.5mm according to the mixture ratio of 5%, 30%, 40% and 25%, and are dissolved after 2 hours at the temperature of 60 ℃, more than 70% of the dissolvable temporary plugging diversion particles can be dissolved after 8 hours, and the dissolvable temporary plugging diversion particles are completely dissolved after 24 hours.
Preferably, the diameter of the small-diameter soluble bridge plug in the step 6) is 68mm, the pressure-bearing capacity is 70MPa, the bridge plug body of the small-diameter soluble bridge plug is completely dissolved in 10 days at the temperature of 60 ℃, and the rubber cylinder of the small-diameter soluble bridge plug is completely dissolved in 27 days.
Example 7
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Preferably, the medium-diameter perforating gun cartridges in the step 3) are 60 guns, the length of a single cluster perforating hole of the first section of multi-cluster perforating is 2-5 m, and the cluster spacing is 3-6 m.
Preferably, the dissolvable temporary plugging diversion particles in the step 4) are composed of four dissolvable temporary plugging diversion particles with the particle diameters of 4mm, 3mm, 1mm and 0.5mm according to the mixture ratio of 5%, 30%, 40% and 25%, and are dissolved after 2 hours at the temperature of 60 ℃, more than 70% of the dissolvable temporary plugging diversion particles can be dissolved after 8 hours, and the dissolvable temporary plugging diversion particles are completely dissolved after 24 hours.
Preferably, the diameter of the small-diameter soluble bridge plug in the step 6) is 68mm, the pressure-bearing capacity is 70MPa, the bridge plug body of the small-diameter soluble bridge plug is completely dissolved in 10 days at the temperature of 60 ℃, and the rubber cylinder of the small-diameter soluble bridge plug is completely dissolved in 27 days.
Preferably, the bridge plug tool string in the step 6) comprises a cable, a phi 54 bridle, a phi 54 magnetic locator, a conversion joint and a setting tool, wherein the lower end of the cable is connected with the phi 54 bridle, the lower end of the phi 54 bridle is connected with the phi 54 magnetic locator, the lower end of the phi 54 magnetic locator is connected with the conversion joint, the lower end of the conversion joint is connected with the setting tool, the lower end of the setting tool is connected with the small-diameter soluble bridge plug, the voltage of the direct current is 300V, and the current is 50-1000 mA.
Example 8
The invention discloses a sectional multi-cluster fracturing method for a slim hole sidetracking horizontal well, which comprises the following steps of:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
Preferably, the number of fracturing sections and the perforation positions of the sidetrack horizontal well of the small well in the step 1) are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetrack horizontal well.
Preferably, the number of the fracturing sections of the sidetrack horizontal well drilled in the step 1) is 2-10, and the section spacing is 20-30 m.
Preferably, the specification of the first drift size gauge in the step 2) is phi 118mm × 1.5m, and the specification of the second drift size gauge is phi 70mm × 1.5 m.
Preferably, the medium-diameter perforating gun cartridges in the step 3) are 60 guns, the length of a single cluster perforating hole of the first section of multi-cluster perforating is 2-5 m, and the cluster spacing is 3-6 m.
Preferably, the dissolvable temporary plugging diversion particles in the step 4) are composed of four dissolvable temporary plugging diversion particles with the particle diameters of 4mm, 3mm, 1mm and 0.5mm according to the mixture ratio of 5%, 30%, 40% and 25%, and are dissolved after 2 hours at the temperature of 60 ℃, more than 70% of the dissolvable temporary plugging diversion particles can be dissolved after 8 hours, and the dissolvable temporary plugging diversion particles are completely dissolved after 24 hours.
Preferably, the diameter of the small-diameter soluble bridge plug in the step 6) is 68mm, the pressure-bearing capacity is 70MPa, the bridge plug body of the small-diameter soluble bridge plug is completely dissolved in 10 days at the temperature of 60 ℃, and the rubber cylinder of the small-diameter soluble bridge plug is completely dissolved in 27 days.
Preferably, the bridge plug tool string in the step 6) comprises a cable, a phi 54 bridle, a phi 54 magnetic locator, a conversion joint and a setting tool, wherein the lower end of the cable is connected with the phi 54 bridle, the lower end of the phi 54 bridle is connected with the phi 54 magnetic locator, the lower end of the phi 54 magnetic locator is connected with the conversion joint, the lower end of the conversion joint is connected with the setting tool, the lower end of the setting tool is connected with the small-diameter soluble bridge plug, the voltage of the direct current is 300V, and the current is 50-1000 mA.
Preferably, the diameter of the soluble ball in the step 7) is 40.6mm, and the dissolving time is 8-12 h.
Example 9
Step 1) sidetrack drilling of horizontal well with slim hole for horizontal section length of 100m, and step 31/2The method comprises the following steps of 1, well cementing and completing of an oil pipe (with the inner diameter of 76 mm), determining the number of the reconstruction fracturing sections to be 3 sections according to reservoir conditions, and enabling the section spacing to be 20-30 m;
step 2), a first drifting gauge with phi of 118mm multiplied by 1.5m is put into the hanger, and a second drifting gauge with phi of 70mm multiplied by 1.5m is put into the bottom of the lateral drilling horizontal well with the small well hole after the first drifting gauge is taken out and the first drifting gauge is put into;
step 3) taking out a second well gauge, adopting a 1.9 'oil pipe and washing a lateral drilling horizontal well of the slim hole to the bottom of the well by using active water, and adopting the 1.9' oil pipe to convey small-diameter perforating gun bullets (60 bullets) to carry out first-section multi-cluster perforation, wherein the length of a single cluster of perforation is 2m, and the cluster spacing is 3 m;
step 4) adopting a single upper sealing pipe column to lower the packer into the upper part of the hanger by 1-2 m, carrying out fracturing construction on the first section, designing the sand adding amount to be 30 square, stopping sand when 15 square is added, pumping soluble temporary plugging steering particles, temporarily plugging and boosting pressure by 4.5MPa (if the sand adding amount is less than or equal to 3MPa, pumping the soluble temporary plugging steering particles again until the temporary plugging and boosting pressure is more than 3 MPa), continuing to add sand until the construction is finished, and finishing the first section of multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) pumping down the small-diameter soluble bridge plug and the bridge plug tool string by utilizing a hydraulic pump, wherein the diameter of the small-diameter soluble bridge plug is 68mm, the small-diameter soluble bridge plug is arranged to be 10m below the upper part of the first section, and the small-diameter soluble bridge plug is sealed by adopting direct current (the voltage is about 300V and the current is 50-1000 mA) and is lifted out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting 1.9' oil pipe to convey small-diameter perforating gun charges (60 gun charges), wherein the length of a single cluster of perforation is 2m, the cluster spacing is 3m, and a small-diameter soluble bridge plug is plugged by throwing a soluble ball after the perforation is finished, wherein the diameter of the soluble ball is 40.6 mm;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
step 9) then repeating steps 5) through 8) to complete the third multi-cluster fracture.
The invention realizes 31/2"staged multi-cluster fracturing of cementing, completion and sidetrack horizontal well with oil pipe (inner diameter 76 mm); after pressing, bridge plugs do not need to be fished, so that the construction links are greatly reduced; the quick-dissolving and soluble temporary plugging steering particles are reliable in plugging effect and high in multi-cluster cracking probability; the small-diameter soluble bridge plug and the soluble temporary plugging steering particles are made of soluble materials, the transformation effect is not influenced, and the transformation effect of the lateral drilling horizontal well of the slim hole can be effectively improved through the method.
The invention provides a1/2' oil pipe (inner diameter 76 mm) cementing well completion small borehole sidetrack horizontal well subsection multi-cluster fracturing method, determining fracturing segment number and perforation position according to reservoir condition, each segment adopting multi-cluster perforation to complete first segment multi-cluster fracturing, then realizing subsection fracturing of second segment and later segments by hydraulic pumping small diameter soluble bridge plug, wherein in fracturing construction process, dissolvable temporary blocking diverting particles are pumped to block fractured clusters, fracturing fluid is forced to enter non-fractured clusters to realize effective fracturing of multiple clusters in segments, after fracturing construction is finished, small diameter soluble bridge plug and temporary blocking diverting particlesAnd (3) the fracturing agent is dissolved automatically under the stratum condition, the transformation effect is not influenced, and the steps are repeated until the fracturing of all sections of the slim hole sidetracking horizontal well is completed.
The method solves the problems that the construction process of the fishable bridge plug with the small diameter is complex and the opening rate of each cluster of the conventional fracturing is low in the prior art, and has the advantages of no plug drilling, high construction efficiency and low cost; the invention has the advantages of simple site construction, reliable plugging, obvious effect after pressing and high controllability.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (8)
1. A sectional multi-cluster fracturing method for a slim hole sidetrack horizontal well is characterized by comprising the following steps:
step 1) determining the number of fracturing sections and perforation positions of a slim hole sidetracking horizontal well; the number of fracturing sections and the perforation position of the slim hole sidetracking horizontal well are determined according to the knowledge of the residual oil distribution and the electric measurement and interpretation result of the sidetracking horizontal well;
step 2) a first drift size gauge is put into the lateral drilling horizontal well of the slim hole to the position of the hanger, the first drift size gauge is taken out, and then the second drift size gauge is put into the well bottom of the lateral drilling horizontal well of the slim hole;
step 3) taking out a second well gauge, flushing the slim hole sidetrack horizontal well to the bottom of the well by using 1.9 'oil pipes and using active water, and then conveying small-diameter perforating gun bullets by using 1.9' oil pipes to perform first-section multi-cluster perforation;
step 4) adopting a single upper sealing pipe column to lower a packer into the upper part of the hanger for 1-2 m, performing fracturing construction on the first section, stopping adding sand when the sand adding amount reaches 50%, pumping soluble temporary blocking steering particles, blocking the broken clusters, forcing fracturing fluid of the fracturing construction to enter the non-broken clusters, adding sand until the construction is finished when the temporary blocking pressure rise is more than 3MPa, pumping the soluble temporary blocking steering particles again until the temporary blocking pressure rise is more than 3MPa if the temporary blocking pressure rise is less than or equal to 3MPa, and then adding sand until the construction is finished to finish the first section multi-cluster fracturing;
step 5), performing open flow and backwashing after fracturing;
step 6) then, a small-diameter soluble bridge plug and a bridge plug tool string are put in by utilizing a hydraulic pump, the small-diameter soluble bridge plug is put between the first section and the second section, then the small-diameter soluble bridge plug is set by adopting direct current, and the small-diameter soluble bridge plug is taken out of the bridge plug tool string;
step 7) carrying out second-stage multi-cluster perforation by adopting a 1.9' oil pipe to convey small-diameter perforating gun bullets, and throwing a soluble ball to block a small-diameter soluble bridge plug after the perforation is finished;
step 8) repeating the step 4) to finish the second section of multi-cluster fracturing;
and 9) repeating the steps 5) to 8) to sequentially complete the multi-cluster fracturing construction of other sections of the slim hole sidetracking horizontal well.
2. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: the number of the fracturing sections of the sidetrack horizontal well drilled in the middle and small well in the step 1) is 2-10, and the section interval is 20-30 m.
3. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: the specification of the first drift size gauge in the step 2) is phi 118mm multiplied by 1.5m, and the specification of the second drift size gauge is phi 70mm multiplied by 1.5 m.
4. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: and in the step 3), the medium-small diameter perforating gun bullets are 60 bullets, the length of a single cluster perforating hole of the first-section multi-cluster perforating is 2-5 m, and the cluster interval is 3-6 m.
5. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: the dissoluble temporary plugging steering particles in the step 4) consist of dissoluble temporary plugging steering particles with four particle sizes of 4mm, 3mm, 1mm and 0.5mm according to the proportion of 5 percent, 30 percent, 40 percent and 25 percent by weight, and start to dissolve after 2 hours at the temperature of 60 ℃, can dissolve more than 70 percent after 8 hours, and are completely dissolved after 24 hours.
6. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: the diameter of the small-diameter soluble bridge plug in the step 6) is 68mm, the pressure-bearing capacity is 70MPa, the bridge plug body of the small-diameter soluble bridge plug is completely dissolved in 10 days at the temperature of 60 ℃, and the rubber cylinder of the small-diameter soluble bridge plug is completely dissolved in 27 days.
7. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: the bridge plug tool string in the step 6) comprises a cable, a phi 54 bridle head, a phi 54 magnetic locator, a conversion joint and a setting tool, wherein the lower end of the cable is connected with the phi 54 bridle head, the lower end of the phi 54 bridle head is connected with the phi 54 magnetic locator, the lower end of the phi 54 magnetic locator is connected with the conversion joint, the lower end of the conversion joint is connected with the setting tool, the lower end of the setting tool is connected with a small-diameter soluble bridge plug, the voltage of the direct current is 300V, and the current is 50-1000 mA.
8. The sectional multi-cluster fracturing method for the slim-hole sidetracking horizontal well according to claim 1, characterized by comprising the following steps: the diameter of the soluble ball in the step 7) is 40.6mm, and the dissolving time is 8-12 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304847.1A CN110130867B (en) | 2019-04-16 | 2019-04-16 | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304847.1A CN110130867B (en) | 2019-04-16 | 2019-04-16 | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110130867A CN110130867A (en) | 2019-08-16 |
| CN110130867B true CN110130867B (en) | 2021-08-31 |
Family
ID=67570063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910304847.1A Active CN110130867B (en) | 2019-04-16 | 2019-04-16 | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110130867B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984943B (en) * | 2019-11-21 | 2022-02-01 | 中国石油天然气股份有限公司 | Limit clustering perforation fracturing method for long horizontal well of compact reservoir |
| CN110984945A (en) * | 2019-11-28 | 2020-04-10 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Casing cementing slim hole staged fracturing device and using method |
| CN111219177B (en) * | 2020-03-03 | 2022-05-10 | 中国石油天然气股份有限公司 | 3-inch and half-small-borehole fracturing method for sidetracking horizontal well of ultra-low permeability sandstone reservoir |
| CN111472739A (en) * | 2020-04-09 | 2020-07-31 | 中国石油天然气股份有限公司 | Staged fracturing production-increasing transformation method for 3-inch semi-solid well completion shaft of sidetracking horizontal well |
| CN111810106B (en) * | 2020-08-05 | 2022-08-30 | 中国石油天然气股份有限公司 | Three-inch half-slim hole sidetrack horizontal well efficient staged fracturing method |
| CN112302570B (en) * | 2020-10-26 | 2022-08-12 | 中国石油大学(北京) | Construction method and device based on temporary plugging of reservoir |
| CN112360421A (en) * | 2020-12-01 | 2021-02-12 | 中国石油天然气股份有限公司 | Full-drift-diameter well completion fracturing method for low-permeability reservoir sidetracking well |
| CN115711113A (en) * | 2021-08-23 | 2023-02-24 | 中国石油天然气股份有限公司 | Efficient fracturing method for sidetrack short horizontal well |
| CN118065856B (en) * | 2024-04-21 | 2024-06-21 | 四川省威沃敦石油科技股份有限公司 | Fine fracturing process |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877824A (en) * | 2012-09-29 | 2013-01-16 | 中国石油天然气股份有限公司 | Horizontal well hydraulic jet staged multi-cluster fracturing method |
| CN202900060U (en) * | 2012-11-12 | 2013-04-24 | 中国石油天然气股份有限公司 | Coiled tubing perforation, casing fracturing and bridge plug packing process pipe string |
| WO2014031406A1 (en) * | 2012-08-24 | 2014-02-27 | Halliburton Energy Services, Inc. | Gas fracture injection to overcome retrograde condensation in gas wells |
| CN103867177A (en) * | 2012-12-14 | 2014-06-18 | 中国石油天然气股份有限公司 | Horizontal well fracturing method |
| CN104564001A (en) * | 2014-12-03 | 2015-04-29 | 中国石油化工股份有限公司 | Horizontal well multi-cluster fracturing method and multi-cluster perforating and fracturing pipe column for implementing method |
| CN104989358A (en) * | 2015-06-18 | 2015-10-21 | 中国石油化工股份有限公司华东分公司采油厂 | Shale gas horizontal well bridge plug separation and ball throwing segmented fracturing process |
| CN105484719A (en) * | 2015-12-29 | 2016-04-13 | 中国石油天然气股份有限公司 | Method for improving multi-cluster cracking effectiveness by adopting multi-scale soluble ball to seal seam |
| CN106593387A (en) * | 2016-12-21 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for realizing staged multi-cluster fracturing of horizontal well |
| CN107939376A (en) * | 2017-11-27 | 2018-04-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of gas well gas testing operation integrated synthesis completion method |
| CN109267983A (en) * | 2017-07-17 | 2019-01-25 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well refracturing device and method based on the complete well of the preset tubing string of naked eye |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9394779B2 (en) * | 2014-07-03 | 2016-07-19 | Baker Hughes Incorporated | Hydraulic fracturing isolation methods and well casing plugs for re-fracturing horizontal multizone wellbores |
-
2019
- 2019-04-16 CN CN201910304847.1A patent/CN110130867B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014031406A1 (en) * | 2012-08-24 | 2014-02-27 | Halliburton Energy Services, Inc. | Gas fracture injection to overcome retrograde condensation in gas wells |
| CN102877824A (en) * | 2012-09-29 | 2013-01-16 | 中国石油天然气股份有限公司 | Horizontal well hydraulic jet staged multi-cluster fracturing method |
| CN202900060U (en) * | 2012-11-12 | 2013-04-24 | 中国石油天然气股份有限公司 | Coiled tubing perforation, casing fracturing and bridge plug packing process pipe string |
| CN103867177A (en) * | 2012-12-14 | 2014-06-18 | 中国石油天然气股份有限公司 | Horizontal well fracturing method |
| CN104564001A (en) * | 2014-12-03 | 2015-04-29 | 中国石油化工股份有限公司 | Horizontal well multi-cluster fracturing method and multi-cluster perforating and fracturing pipe column for implementing method |
| CN104989358A (en) * | 2015-06-18 | 2015-10-21 | 中国石油化工股份有限公司华东分公司采油厂 | Shale gas horizontal well bridge plug separation and ball throwing segmented fracturing process |
| CN105484719A (en) * | 2015-12-29 | 2016-04-13 | 中国石油天然气股份有限公司 | Method for improving multi-cluster cracking effectiveness by adopting multi-scale soluble ball to seal seam |
| CN106593387A (en) * | 2016-12-21 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for realizing staged multi-cluster fracturing of horizontal well |
| CN109267983A (en) * | 2017-07-17 | 2019-01-25 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well refracturing device and method based on the complete well of the preset tubing string of naked eye |
| CN107939376A (en) * | 2017-11-27 | 2018-04-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of gas well gas testing operation integrated synthesis completion method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110130867A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110130867B (en) | Staged multi-cluster fracturing method for slim-hole sidetracking horizontal well | |
| CN106223922B (en) | Shale gas horizontal well proppant intra-seam shielding temporary plugging staged fracturing process | |
| CN110397428B (en) | Displacement coalbed methane yield increasing method for coalbed methane jointly mined by vertical well and U-shaped butt well | |
| CN107313762B (en) | Shale hydraulic fracturing method | |
| CN101539007B (en) | Abrasive jetting device and method for abrasive jetting flow and jetting perforation and multiple fracturing | |
| CN107806337B (en) | Selective cluster-by-cluster fracturing process for horizontal well of shale gas reservoir | |
| CN110005388B (en) | Fracturing and yield increasing method for 3-inch semi-slim well side drilling of ultra-low permeability oil reservoir | |
| CN111472739A (en) | Staged fracturing production-increasing transformation method for 3-inch semi-solid well completion shaft of sidetracking horizontal well | |
| CN111219177B (en) | 3-inch and half-small-borehole fracturing method for sidetracking horizontal well of ultra-low permeability sandstone reservoir | |
| CN104879110B (en) | Cluster perforation and staged fracturing combined process | |
| CN111594130B (en) | Method for integrated periodical production of encryption adjustment of pressure, injection and extraction | |
| CN112593910A (en) | Efficient mining method for broken low-permeability coal bed gas short horizontal well group | |
| CN111058817B (en) | Multi-section perforation fracturing horizontal well shaft integrity recovery method | |
| CN110608027B (en) | Large-scale hydraulic fracturing permeability-increasing pre-gas-pumping treatment process for directional ultra-long drilling of roadway | |
| CN112431579B (en) | Preset small-diameter pipe internal fracturing device and method for side drilling well and small-hole well | |
| CN105041274A (en) | Short-range two-layer oil-gas reservoir commingled production technique | |
| CN111734359A (en) | Natural gas hydrate horizontal branch well exploitation method based on deepwater suction anchor | |
| CN110805409A (en) | Expansion pipe plugging method based on repeated fracturing cased well | |
| CN112443305A (en) | Horizontal well fracturing method for promoting high fracture extension through twice acid injection and temporary plugging among clusters | |
| RU2533470C2 (en) | Procedure for recovery of tightness in flow strings | |
| CN112709561A (en) | Low-pressure compact marlite reservoir transformation method | |
| CN218953291U (en) | Solid-liquid composite hydraulic fracturing permeability-increasing pipe structure installed along coal seam drilling | |
| CN113445944B (en) | Pollution-free sand prevention and yield increase method for oil well | |
| CN114439450B (en) | Acid fracturing yield increasing technology for carbonate deep geothermal water reservoir | |
| CN112878996B (en) | Method for judging crack channeling of fractured horizontal well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |