SY/T 5587.10-1993 Specification for hydraulic sandblasting and perforating in conventional well repair work for oil and water wells
Some standard content:
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 5587.10—93
Conventional Well Repair Operations for Oil and Water Wells
Hydraulic Sandblasting and Perforating Operation Procedures
Published on September 9, 1993
China National Petroleum Corporation
Implemented on March 1, 1994
1 Subject Content and Scope of Application
Petroleum and Natural Gas Industry Standard of the People's Republic of China Conventional Well Repair Operations for Oil and Water Wells
Hydraulic Sandblasting and Perforating Operation Procedures
SY/T 5587.10—93
This standard specifies the operation preparation, operation procedures, quality and safety requirements for hydraulic sandblasting and perforating of oil and water wells. This standard applies to sandblasting and perforating in casing of oil and water wells in oil fields. 2 Reference standards
SY/T5587.16 Conventional well repairing operations for oil and water wells, well scraping and casing operation proceduresSY/T5587.7 Conventional well repairing operations for oil and water wells, well washing operation proceduresSY/T5587.6 Conventional well repairing operations for oil and water wells, oil pipe pulling and lowering operation proceduresSY5108 Evaluation method for proppant for hydraulic fracturingSY5211 High-pressure pipe joint, high-pressure active elbow3 Terms
3.1 Jet
Liquid flow that does not contact the solid wall at the periphery of the water-passing section of the liquid is called a jet. 3.2 Sandblasting perforation
Using the effect of high-speed liquid jets and adding a certain amount of quartz sand to the liquid, the process technology of continuously spraying and penetrating the pipe wall and the well wall (formation).
3.3 Nozzle
It has a certain geometric size and strength, so that the liquid flow is concentrated and not dispersed when passing through. 3.4 Jet velocity
The velocity of liquid passing through the nozzle under the action of external force. 3.5 Effective jet distance
The distance from the nozzle outlet to the object being jetted. 4 Construction design and approval
4.1 Prepare the construction design according to the requirements of hydraulic sandblasting perforation. The format of the design book is specified in Appendix A (Supplement). 4.2 The design book shall be implemented after approval by the competent department and leaders. 5 Operation preparation
5.1 Tool string preparation
5.1.1 The number of ejectors and nozzles shall be prepared according to the requirements of the designed jet layer section. 5.1.2 The size, specifications and quantity of hydraulic anchors, centralizers and single-flow valves shall be prepared according to the casing size and hydraulic sandblasting perforation design. 5.1.3 The thread quality of 62mm diameter oil pipes shall be checked. Approved by China National Petroleum Corporation on September 9, 1993 and implemented on March 1, 1994
5.2 Wellbore preparation
SY/T 5587. 10..-93
5.2.1 Well cleaning and scraping operations shall comply with the provisions of SY/T5587.16. 5.2.2 Well washing operations shall comply with the provisions of SY/T5587.7. 6 Operation procedures
6.1 Lower the sandblasting hose bar to the designed depth. The calculation of the nozzle lowering depth is as specified in B1 of Appendix B (Supplement). The pipe string structure from bottom to top:
a. For single-layer injection:
single-flow valve, injector, hydraulic anchor, stabilizer, oil pipe; b. For two-layer injection:
single-flow valve, hydraulic anchor, injector, stabilizer, injector, hydraulic anchor, stabilizer, oil pipe. 6.2 Use magnetic positioning to check the injector depth. 6.3 Connect the ground pipeline and high-pressure pipeline and the pressure test should be qualified. 6.4 Positive circulation well washing is normal by throwing the ball to test injection. After the displacement and pump pressure are stable, add sand and inject formally. The quartz sand used for sand addition should comply with the provisions of SY5108.
6.5 When the injection time is reached and the pump fat drops to 15+1MPa, stop the injection, displace the sand-containing liquid and backwash the well, then lift the inner pipe string.
7 Quality control and safety requirements for hydraulic sandblasting perforation 7.1 Quality control for hydraulic sandblasting perforation
7.1.1 The nozzle inlet should be streamlined, and 2 to 4 nozzles should be evenly distributed in a spiral shape in the ejector, and the pitch should meet the perforation density requirements. For nozzle diameter selection, see formulas B3 and B4 in Appendix B (Supplement). 7.1.2 The jet velocity through the nozzle should not be less than 120m/s 7.1.3 The optimal effective jet distance is 10~25mm. 7.1.4 The jet pump pressure should not be less than 20MPac
7.1.5 The jet displacement should not be less than 6.77L/s, and the displacement calculation should be based on formulas B5 and B6 in Appendix B (Supplement). 7.1.6 The optimal jet time is 20~30min. 7.1.7 When using a sand-carrying fluid with a density of 1.0g/cm, the sand-carrying concentration is 6~9kg/m. When crude oil is used as sand-carrying fluid, the sand-carrying concentration is 15-22.5 kg/m2
7.2 Safety requirements
7.2.1 Requirements before injection
7.2.1.1 The downhole tools and pipe string must be tested and qualified after ground quality inspection. The injector must be tested on the ground. When multi-stage injection, the injector must be tested on the ground. The downhole tools should have a certificate of qualification. 7.2.1.2 The wellhead should be equipped with a backwashing vehicle and a backwashing pipeline that can be quickly replaced. It is strictly forbidden to use a hose line. 7.2.1.3 It is strictly forbidden to have any falling objects inside and outside the injection pipe string. 7.2.2 Injection construction requirements:
7.2.2.1 The test pressure of the ground pipeline should be 5MPa higher than the designed upper pressure. 7.2.2.2 The sand should be added continuously and evenly, and no dirt should be mixed in to avoid affecting the injection effect and clogging the nozzle. 7.2.2.3 If the pump pressure suddenly increases or decreases during the jetting process, the well should be backwashed in time. 7.2.2.4 After the sand is added and the sand is replaced by the nozzle, the sand in the lift tube should be backwashed immediately. 8 Hydraulic sandblasting perforation quality indicators and inspection
8.1 Hydraulic sandblasting perforation quality indicators
8.1.1 Meet the national standards of hydraulic sandblasting perforation, penetrate the oil-sensitive casing and thick cement ring: eliminate the pollution in the near-well area. 2
SY/T 5587.10-93
8.1.2 Meet the design requirements of the facility and play the role of production increase measures. 8.1.3 The casing of the well section after hydraulic jetting meets the provisions of SY/T5587.16. 8.1.4 The on-site acquisition data includes the working parameters before, after and during the jetting process, which meet the provisions of Appendix C (Supplement). B.2 Operation quality inspection method
8.2.1 The well should be qualified after jetting.
8.2.2 Before and after jetting, compare the stable absorption, working pressure and production conditions, and check the jetting effect. And make a construction summary according to the provisions of Appendix D (supplement).
Basic data
1 Main data
Well bottom, m
SY/T 5587.10—93
Appendix A
Hydraulic sandblasting and emulsion perforation operation design book format
(supplement)
Hydraulic sandblasting and perforation operation design book for well completion well depth, m
Oil compensation distance, m
Drilling fluid density of drilled oil layer, each/cm
Completion casing data
3 Oil layer properties and tests Data
Oil layer section, m
4Casing integrity and previous operations
II. Hydraulic sandblasting perforation
1Purpose of hydraulic sandblasting perforation
2Hydraulic sandblasting perforation section
Porosity, %
Entry section, m
Diagnostic penetration, μm2
Consolidation quality
Anti-internal Pressure
Oil content
Cement return height
Formation pressure, MPa
3 Equipment and material preparation
Type fracturing truck, parts
Sand filter truck, parts
Sand tank, parts
Liquid supply truck, parts
Backwash truck, parts
Nozzle diameter, cm
Number of nozzles, pieces
Hydraulic anchor model and quantity
Construction parameters
Size, mm
Number, m
Nozzle insertion depth, m
Pressure, MPa
Absorption, m2
Jet working pressure, MPa
Jet displacement, L/s
Jet velocity, m/s
SY/T 5587.10--93
Number of ejectors, pieces
Number of centralizers, pieces
Injection liquid
Surfactant
Quartz sand
Displacement fluid
Well killing fluid
Check valve
Quantity, m
Quantity, kg
Diameter, mm
Quantity, m2
Quantity·m
Density, g/cma
Quantity, m
Quantity, pieces
Diameter, mm
Quantity, pieces
Amount of injection liquid used. m
Quartz sand consumption, m
Sand carrying concentration, kg/m2
Injection time: min
Quantity, ma
Pressure, MPa
Displacement, L/s
Time, min
Time, min
Pressure, MPa
Displacement, L/s
Density g/cma
Well pressure square
Quantity, m
5 Construction steps
Well clearance.
SY/T 5567. 10---93
Insert the jet string in sequence and perform magnetic positioning, No.
Pipeline pressure test
Well washing fluid density
Check valve
Hydraulic anchor
Ejector
Center
Depth, m
MPa, no puncture and no leakage, test pump is normal.
g/cm, well washing time
5) Hydraulic sandblasting perforation construction
(1) First time put into Φ
(2) Pressure reaches
m jetting.
（3）Injection time
mm steel ball; the second injection
MPa. displacement reaches
min, and the pressure drops to
（4）Repeat T sequence (1)~(3) for more than ten sections of injection, (5) use
(6) Use
type displacement fluid
type well washing fluid to backwash the well, pressure
（7）Observe the injection effect, pressure drop, absorption base, etc. (8) Use density
MPa, displacement
（9）Pull out and inner pipe string.
III. Design and approval
g/cm, well killing fluid
L/s.
Replace to
well depth, m
Ejector
Hydraulic anchor
Center
mmSteel ball test spray
L/After, if Φ
MPa is entered, stop sand.
MPa, displacement
m, use
depth, m
mmquartz sand
L/s, well washing time
cycle,
min.
Well killing methodWell killing, pressure
Calculation of the depth of the nozzle
Where.
In the formula:
Actual nozzle immersion depth, m;
-Oil pipe length, m,
SY/T 5587. 1093
Appendix B
Related calculation formulas
(supplement)
HL--AL+hh
△L---Oil pipe elongation under deadweight and pressure in the injection liquid, m-Oil compensation height, m;
-Oil pipe excess buckle length, m.
AL can be calculated using the following formula!
Elongation of the oil pipe, m;
2000EF
f—Force on the oil pipe (equal to the injection pump pressure multiplied by the water-passing section of the oil pipe m), kN; L—Length of the oil pipe, m
E——Elastic modulus of steel, E=2.0X10°MPaFCross-sectional area of the oil pipe, m\
gThe mass of the unit length of the oil pipe in the liquid, kg/mFor the convenience of construction, the self-weight elongation and pressure elongation of the oil pipe can be obtained by looking up the table. Table B1
Diameter of the oil pipe, m
-Pressure of the injection pump, MPa;
-Length of the oil pipe, m.
Selection of nozzle diameter
B2.1 For three nozzles of equal diameter
Wherein:
d-.-nozzle diameter, cm;
Q—--pump displacement, I./s+
number of nozzles, pieces:
V jet velocity. m/s.
B2. 2 For the nozzle with a large diameter,
self-weight elongation, m
density, 1.0g/cm2
172×10-\L*
171 ×10-*L2
175×10-5*
175×10 -$L8
pressure bearing length tn
1292x10-sp - f.
1140X10-FL
d——nozzle diameter, cm,
where:
Q—-pump displacement, L/s1
-number of nozzles, pieces,
V—jet velocity, m/s.
B3 Selection of pump displacement
In the formula:
Q-displacement, L/s;
In-volume coefficient, calculated as 0.8;
S-piston stroke, cm:
Z-strokes per minute
A-cylinder sleeve area, cm\;
a-cross-sectional area of tie rod, cm\;
SY /T 5587. 10-93
AS-Z (2A-a)
-calculation coefficient, double cylinder double acting m=30. Three cylinder double acting m=20. Considering the needs of hydraulic sandblasting perforating engineering, the following formula can be used for selection. Vnd?
Q--displacement, L/sr
V--jet velocity, m/si
-nozzle teaching volume, pcs;
d--nozzle diameter, cm.
Construction time
Hydraulic sandblasting perforation layer
Nozzle diameter, cm
Number of sprays, pcs
SY/T 5587.10—93
Attached beam C
Well hydraulic sandblasting perforation site record
Nozzle depth, m
Calibration depth, m
Jet working pressure, MPa
Jet displacement. L/s
Jet velocity, m/s
Effective jet distance, mm
Jet liquid
Recorder
Quantity, m
Quantity, m3
Displacement, L/s
Pressure, MPa
Backwash liquid quantity, m3
Time, min
Quantity of washed sand particles, m
Pressure, MPa
(Supplement, parts)
Construction teamwww.bzxz.net
Test situation
Pipeline pressure test, MPa
Well washing fluid type||tt ||Quantity, m
Ball test
Quartz
Pressure, MPa
Displacement, L/s
Diameter, nm
Quantity, m3
Sand carrying concentration, kg/m
Injection time, min
Pressure after stopping sand addition, MPa
Injection working condition
Density of well killing fluid, g/cm
Quantity, m
Pressure, Mra
Displacement, L/
Artificial bottom of well, m
Casing specifications
SY/T 5587.10—93
Appendix D
Summary format of hydraulic sandblasting and emulsion injection
(Supplement)
Casing integrity and previous operations
Hydraulic sandblasting and emulsion injection
Sandblasting and emulsion injection well section
Sandblasting and emulsion injection construction time
Pipeline lowering situation:
Depth calibration situation:
Test injection situation:
Injection situation
Replacement and backwashing well situation:
Nozzle size, cm
Number of nozzles, pcs
Depth of nozzle lowering, 1
Effective injection distance, mm
Test pressure, MPa
Injection force, MPa
Injection speed, L/s
Jet velocity, m,s
Jet fluid
Name English sand
Sand carrying concentration, kg/m2
Jet time, Trini
Well hydraulic sandblasting perforating operation summary
Complete drilling non-deep. m
Oil filling distance, m
Quantity, ma
Diameter, mm
Quantity,
Operation team
Injection pressure, MPa
Absorption, L/min
Production situation
Production situation before jetting
Sandblasting and perforating operation evaluation
Working parameters
Technical evaluation
Nozzle and tool wear
Casing integrity after jetting
Jet shield production situation
Comprehensive economic evaluation
Summary time
SY/T 5587. 10—93
Quantity, m
Pressure, MPa
Displacement, L./s
Backwash fluid type
Pressure, MPa
Time, min
Density, g/cm
Time, min
Before construction
Collate and bind the construction design, on-site records and other materials as appendices to the construction summary. Additional notes:
This standard is proposed and managed by the Oil and Gas Production Professional Standardization Committee. This standard was drafted by the Downhole Operations Department of the Xinjiang Petroleum Administration Bureau. The main drafters of this standard: Lu Shiqing and Wang Xinhe.
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