CA2743637A1 - Recyclable low solid content micro-bubble drilling fluid or completion fluid - Google Patents
Recyclable low solid content micro-bubble drilling fluid or completion fluid Download PDFInfo
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
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Abstract
A recyclable low solid content micro-bubble drilling fluid or completion fluid is provided. By the parts of weight, the fluid comprises: 1 recyclable micro-bubble low solid content composite treating agent SD-LGA 3-4; 2 low-density low solid content tackifier SD-LGV 0.5-1; 3 low-density regulator SD-LFD 0.5-1;
4 low-density foam stabilizer SD-LFS 0.5-1; 5 low-density flow-type regulator SD-LFR 0.5-1; 6 clear water 100. The procedure of preparing the fluid comprises:
adding the above-mentioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing and stirring uniformly.
4 low-density foam stabilizer SD-LFS 0.5-1; 5 low-density flow-type regulator SD-LFR 0.5-1; 6 clear water 100. The procedure of preparing the fluid comprises:
adding the above-mentioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing and stirring uniformly.
Description
Recyclable Low Solid Content Micro-Bubble Drilling Fluid or Completion Fluid 1. Field of the Invention The invention relates to the drilling fluid and completion fluid, in particular to a recyclable low solid content micro-bubble drilling fluid or completion fluid.
II. Background of the Invention The recyclable micro-bubble drilling fluid is frequently used in gas-oil exploration of low pressure formation, low permeability formation and depleted formation. The patent (Chinese patent number 20041001323.7): Application of Residual Active Protein as Bubble Drilling Fluid and Preparation Method Thereof discloses a micro-bubble drilling fluid comprising following components by the parts of weight: 5 parts of bentonite, 0.1 parts of tackifier, 0.2 parts of stabilizer and 0.5 parts of foaming agent. The tackifier is hydroxymethyl cellulose and the stabilizer is polyacrylamide. Such art has following shortcomings. (1) The content of bentonite is high, bentonite slurry should be prehydrated and the complex preparation takes a long time. (2) The foam system made by adding foaming agent into the bentonite slurry is loose inside, uneven, unstable and unsatisfied in foam stability and has uncontrollable density, making the maintenance difficult.
(3) Such system will easily cause hydrous swelling in low-porosity low-permeability formations and block channels of steam and gas layers, resulting in great damage to the reservoir and lower oil production rate.
III. Summary of the Invention The invention aims at providing a recyclable low solid content micro-bubble drilling fluid or completion fluid which adopts a recyclable formula with low solid content, stable performance and simple preparation method. This invention efficiently overcomes or avoids aforementioned shortcomings of current art.
The recyclable low solid content micro-bubble drilling fluid or completion fluid comprises following components by the parts of weight:
(1) recyclable micro-bubble low solid content composite treating agent SD-LGA, 3-4 parts,
II. Background of the Invention The recyclable micro-bubble drilling fluid is frequently used in gas-oil exploration of low pressure formation, low permeability formation and depleted formation. The patent (Chinese patent number 20041001323.7): Application of Residual Active Protein as Bubble Drilling Fluid and Preparation Method Thereof discloses a micro-bubble drilling fluid comprising following components by the parts of weight: 5 parts of bentonite, 0.1 parts of tackifier, 0.2 parts of stabilizer and 0.5 parts of foaming agent. The tackifier is hydroxymethyl cellulose and the stabilizer is polyacrylamide. Such art has following shortcomings. (1) The content of bentonite is high, bentonite slurry should be prehydrated and the complex preparation takes a long time. (2) The foam system made by adding foaming agent into the bentonite slurry is loose inside, uneven, unstable and unsatisfied in foam stability and has uncontrollable density, making the maintenance difficult.
(3) Such system will easily cause hydrous swelling in low-porosity low-permeability formations and block channels of steam and gas layers, resulting in great damage to the reservoir and lower oil production rate.
III. Summary of the Invention The invention aims at providing a recyclable low solid content micro-bubble drilling fluid or completion fluid which adopts a recyclable formula with low solid content, stable performance and simple preparation method. This invention efficiently overcomes or avoids aforementioned shortcomings of current art.
The recyclable low solid content micro-bubble drilling fluid or completion fluid comprises following components by the parts of weight:
(1) recyclable micro-bubble low solid content composite treating agent SD-LGA, 3-4 parts,
(2) low-density low solid content tackifier SD-LGV, 0.5-1 parts,
(3) low-density regulator SD-LFD, 0.5-1 parts,
(4) low-density foam stabilizer SD-LFS, 0.5-1 parts,
(5) low-density flow-type regulator SD-LFR, 0.5-1 parts, and
(6) clear water, 100 parts Wherein, (1) the recyclable micro-bubble low solid content composite treating agent SD-LGA is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1-3:0.2-0.3:0.3-1, (2) the low-density low solid content tackifier SD-LGV is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC
and hydroxyethyl cellulose HEC by ratio of 0.5-2:0.1-0.3:0.5-2, (3) the low-density regulator SD-LFD
is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1-4:2-4:6-10:6-10, (4) the low-density foam stabilizer SD-LFS
is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-11V for drilling fluid by ratio of 3-8:6-10:3-8, and (5) the low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3-7:6-10:3-7.
The preparation method comprises steps as follows: adding the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing them and stirring the mixture uniformly.
Compared with current art, the invention is characterized by the following advantages.
1. The solid content is low, stability of micro-bubble is satisfying and pollution to reservoir is little.
2. The micro-bubble has good rheological behavior, cuttings carrying capacity and lubricating property.
3. Foam composite can be formed to stop the solid and liquid phases from entering the reservoir, and protect the oil-gas reservoir well.
4. The density can be regulated in a wide range according to the formation pressure coefficient and downhole safety.
5. The fluid can be prepared fast on site without prehydrated bentonite slurry or special equipment and is recyclable.
6. The multifunctional fluid is able to proof leakage and protect the reservoir. It is suitable for drilling and completing both carbonate formation and low-pressure low-permeability formations like coal seam and soft mudstone formation.
V. Description of the Preferred Embodiment A recyclable low solid content micro-bubble drilling fluid or completion fluid comprises the following components by the parts of weight:
(1) recyclable micro-bubble low solid content composite treating agent SD-LGA, 3-4 parts, (2) low-density low solid content tackifier SD-LGV, 0.5-1 parts, (3) low-density regulator SD-LFD, 0.5-1 parts, (4) low-density foam stabilizer SD-LFS, 0.5-1 parts, (5) low-density flow-type regulator SD-LFR, 0.5-1 parts, and, (6) clear water, 100 parts, Wherein, (1) the recyclable micro-bubble low solid content composite treating agent SD-LGA is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1-3:0.2-0.3:0.3-1, (2) the low-density low solid content tackifier SD-LGV is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC
and hydroxyethyl cellulose HEC by ratio of 0.5-2:0.1-0.3:0.5-2, (3) the low-density regulator SD-LFD
is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1-4:2-4:6-10:6-10, (4) the low-density foam stabilizer SD-LFS
is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3-8:6-10:3-8, and (5) the low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3-7:6-10:3-7.
The preparation method comprises steps as follows: adding the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing them and stirring the mixture uniformly. The embodiments are described below.
Embodiment 1 Take following components by the following parts: (1) 3 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1:
0.2:0.3, (2) 0.5 parts of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC
by ratio of 0.5:0.1:0.5, (3) 0.5 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1:2:6:6, (4) 0.5 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3:6:3, (5) 0.5 parts of low-density flow-type regulator SD-LFR which is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3:6:3 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Embodiment 2 Take following components by the following parts: (1) 3.3 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 2:0.22:0.5, (2) 0.7 parts of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC
by ratio of 1:0.13:1, (3) 0.7 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 2:2.5:7:7, (4) 0.7 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 5:8:5, (5) 0.7 parts of low-density flow-type regulator SD-LFR which is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 4:7:4 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Embodiment 3 Take following components by the parts of weight: (1) 3.6 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 2.5:0.25:0.7, (2) 0.9 parts of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC by ratio of 1.5:0.17:1.5, (3) 0.9 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 3:3:8:8, (4) 0.9 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 7:9:7, (5) 0.9 parts of low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 6:9:6 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Embodiment 4 Take following components by the parts of weight: (1) 4 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 3:0.3:1, (2) 1 portion of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC
by ratio of 0.5:0.1:0.5, (3) 0.5 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1:2:6:6, (4) 0.5 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3:6:3, (5) 0.5 parts of low-density flow-type regulator SD-LFR which is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3:6:3 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Test values of abovementioned performances are listed in the table below.
Embodiment Density Plastic viscosity Yield value Pa API filtration ml Index of stability g/cm3 mPa.s of foam Embodiment 1 0.85 10 6.5 9 93 Embodiment 2 0.83 16 9 8 94 Embodiment 3 0.74 23 13 5 95 Embodiment 4 0.81 27 11 5 96 These data have proven that this invention performs well as a drilling fluid or completion fluid.
and hydroxyethyl cellulose HEC by ratio of 0.5-2:0.1-0.3:0.5-2, (3) the low-density regulator SD-LFD
is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1-4:2-4:6-10:6-10, (4) the low-density foam stabilizer SD-LFS
is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-11V for drilling fluid by ratio of 3-8:6-10:3-8, and (5) the low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3-7:6-10:3-7.
The preparation method comprises steps as follows: adding the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing them and stirring the mixture uniformly.
Compared with current art, the invention is characterized by the following advantages.
1. The solid content is low, stability of micro-bubble is satisfying and pollution to reservoir is little.
2. The micro-bubble has good rheological behavior, cuttings carrying capacity and lubricating property.
3. Foam composite can be formed to stop the solid and liquid phases from entering the reservoir, and protect the oil-gas reservoir well.
4. The density can be regulated in a wide range according to the formation pressure coefficient and downhole safety.
5. The fluid can be prepared fast on site without prehydrated bentonite slurry or special equipment and is recyclable.
6. The multifunctional fluid is able to proof leakage and protect the reservoir. It is suitable for drilling and completing both carbonate formation and low-pressure low-permeability formations like coal seam and soft mudstone formation.
V. Description of the Preferred Embodiment A recyclable low solid content micro-bubble drilling fluid or completion fluid comprises the following components by the parts of weight:
(1) recyclable micro-bubble low solid content composite treating agent SD-LGA, 3-4 parts, (2) low-density low solid content tackifier SD-LGV, 0.5-1 parts, (3) low-density regulator SD-LFD, 0.5-1 parts, (4) low-density foam stabilizer SD-LFS, 0.5-1 parts, (5) low-density flow-type regulator SD-LFR, 0.5-1 parts, and, (6) clear water, 100 parts, Wherein, (1) the recyclable micro-bubble low solid content composite treating agent SD-LGA is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1-3:0.2-0.3:0.3-1, (2) the low-density low solid content tackifier SD-LGV is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC
and hydroxyethyl cellulose HEC by ratio of 0.5-2:0.1-0.3:0.5-2, (3) the low-density regulator SD-LFD
is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1-4:2-4:6-10:6-10, (4) the low-density foam stabilizer SD-LFS
is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3-8:6-10:3-8, and (5) the low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3-7:6-10:3-7.
The preparation method comprises steps as follows: adding the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing them and stirring the mixture uniformly. The embodiments are described below.
Embodiment 1 Take following components by the following parts: (1) 3 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1:
0.2:0.3, (2) 0.5 parts of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC
by ratio of 0.5:0.1:0.5, (3) 0.5 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1:2:6:6, (4) 0.5 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3:6:3, (5) 0.5 parts of low-density flow-type regulator SD-LFR which is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3:6:3 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Embodiment 2 Take following components by the following parts: (1) 3.3 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 2:0.22:0.5, (2) 0.7 parts of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC
by ratio of 1:0.13:1, (3) 0.7 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 2:2.5:7:7, (4) 0.7 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 5:8:5, (5) 0.7 parts of low-density flow-type regulator SD-LFR which is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 4:7:4 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Embodiment 3 Take following components by the parts of weight: (1) 3.6 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 2.5:0.25:0.7, (2) 0.9 parts of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC by ratio of 1.5:0.17:1.5, (3) 0.9 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 3:3:8:8, (4) 0.9 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 7:9:7, (5) 0.9 parts of low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 6:9:6 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Embodiment 4 Take following components by the parts of weight: (1) 4 parts of recyclable micro-bubble low solid content composite treating agent SD-LGA which is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 3:0.3:1, (2) 1 portion of low-density low solid content tackifier SD-LGV which is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC and hydroxyethyl cellulose HEC
by ratio of 0.5:0.1:0.5, (3) 0.5 parts of low-density regulator SD-LFD which is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1:2:6:6, (4) 0.5 parts of low-density foam stabilizer SD-LFS which is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3:6:3, (5) 0.5 parts of low-density flow-type regulator SD-LFR which is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3:6:3 and 100 parts of clear water, add the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mix them and stir the mixture uniformly.
Test values of abovementioned performances are listed in the table below.
Embodiment Density Plastic viscosity Yield value Pa API filtration ml Index of stability g/cm3 mPa.s of foam Embodiment 1 0.85 10 6.5 9 93 Embodiment 2 0.83 16 9 8 94 Embodiment 3 0.74 23 13 5 95 Embodiment 4 0.81 27 11 5 96 These data have proven that this invention performs well as a drilling fluid or completion fluid.
Claims
1. A recyclable low solid content micro-bubble drilling fluid or completion fluid comprising following components by the parts of weight:
(1) recyclable micro-bubble low solid content composite treating agent SD-LGA, 3-4 parts, (2) low-density low solid content tackifier SD-LGV, 0.5-1 parts, (3) low-density regulator SD-LFD, 0.5-1 parts, (4) low-density foam stabilizer SD-LFS, 0.5-1 parts, (5) low-density flow-type regulator SD-LFR, 0.5-1 protions, and (6) clear water, 100 parts, wherein, (1) the recyclable micro-bubble low solid content composite treating agent SD-LGA is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1-3:0.2-0.3:0.3-1; (2) the low-density low solid content tackifier SD-LGV is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC
and hydroxyethyl cellulose HEC by ratio of 0.5-2:0.1-0.3:0.5-2; (3) the low-density regulator SD-LFD
is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1-4:2-4:6-10:6-10; (4) the low-density foam stabilizer SD-LFS
is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3-8:6-10:3-8, and (5) the low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3-7:6-10:3-7, and the preparation method comprises steps as follows: adding the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing them and stirring the mixture uniformly.
(1) recyclable micro-bubble low solid content composite treating agent SD-LGA, 3-4 parts, (2) low-density low solid content tackifier SD-LGV, 0.5-1 parts, (3) low-density regulator SD-LFD, 0.5-1 parts, (4) low-density foam stabilizer SD-LFS, 0.5-1 parts, (5) low-density flow-type regulator SD-LFR, 0.5-1 protions, and (6) clear water, 100 parts, wherein, (1) the recyclable micro-bubble low solid content composite treating agent SD-LGA is a composite of bentonite, sodium carbonate and medium viscosity hydroxymethyl cellulose CMC-MV by ratio of 1-3:0.2-0.3:0.3-1; (2) the low-density low solid content tackifier SD-LGV is a composite of high viscosity hydroxymethyl cellulose CMC-HV, biopolymer XC
and hydroxyethyl cellulose HEC by ratio of 0.5-2:0.1-0.3:0.5-2; (3) the low-density regulator SD-LFD
is a composite of sodium dodecyl sulfate AS, sodium dodecyl benzene sulfonate ABS, polyol and mixture F873 of coconut monoethanolamide disodium sulfosuccinate and fatty alcohol ether disodium sulfosuccinate by ratio of 1-4:2-4:6-10:6-10; (4) the low-density foam stabilizer SD-LFS
is a composite of modified starch DFD-140, low viscosity hydroxymethyl cellulose CMC-LV and polyanion cellulose PAC-HV for drilling fluid by ratio of 3-8:6-10:3-8, and (5) the low-density flow-type regulator SD-LFR is a composite of hydrolyzed polyacrylonitrile ammonium salt, zwitterionic polymer viscosity reducer and copolymer of acrylamid and sodium acrylate by ratio of 3-7:6-10:3-7, and the preparation method comprises steps as follows: adding the abovementioned materials in accordance with composition and content in clear water successively at normal temperature and normal pressure by conventional preparation method, mixing them and stirring the mixture uniformly.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910016376.0 | 2009-06-18 | ||
| CN2009100163760A CN101643641B (en) | 2009-06-18 | 2009-06-18 | Low solid phase and micro-foam drilling fluid or completion fluid capable of being used circularly |
| PCT/CN2010/000572 WO2010145188A1 (en) | 2009-06-18 | 2010-04-26 | Recyclable low solid content micro-bubble drilling fluid or completion fluid |
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| Publication Number | Publication Date |
|---|---|
| CA2743637A1 true CA2743637A1 (en) | 2010-12-23 |
| CA2743637C CA2743637C (en) | 2016-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA2743637A Active CA2743637C (en) | 2009-06-18 | 2010-04-26 | Recyclable low solid content micro-bubble drilling fluid or completion fluid |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101643641B (en) |
| CA (1) | CA2743637C (en) |
| WO (1) | WO2010145188A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820085A (en) * | 2012-11-19 | 2014-05-28 | 北京宝沃石油技术有限责任公司 | Oil layer protective agent for drilling fluid and production method thereof |
| CN106047318A (en) * | 2016-06-23 | 2016-10-26 | 中石化石油工程技术服务有限公司 | Water swelling and plugging material and preparation method thereof |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643641B (en) * | 2009-06-18 | 2012-05-30 | 东营泰尔石油技术有限公司 | Low solid phase and micro-foam drilling fluid or completion fluid capable of being used circularly |
| CN101798499B (en) * | 2010-03-30 | 2012-09-05 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Strong inhibition type anti-collapse foam liquid for drilling |
| CN101955757B (en) * | 2010-08-25 | 2012-07-18 | 石家庄华莱鼎盛科技有限公司 | Hydrolyzed polyacrylonitrile-compound ammonium salt for drilling fluid |
| CN102604604B (en) * | 2012-02-06 | 2014-01-29 | 北京探矿工程研究所 | Drilling fluid material and preparation and application thereof |
| CN103937469B (en) * | 2013-08-14 | 2016-08-24 | 北京百利时能源技术有限责任公司 | A kind of Solid Free micro-foam drilling fluid capable of circulation and preparation method thereof |
| CN104830293A (en) * | 2015-04-24 | 2015-08-12 | 西南石油大学 | Clay containing microfoam workover fluid, preparation method and application thereof |
| CN109294535B (en) * | 2018-11-16 | 2021-02-23 | 中联煤层气有限责任公司 | Preparation method and preparation equipment of foam drilling fluid for three-gas open-hole exploitation |
| CN109294536B (en) * | 2018-11-16 | 2021-02-23 | 中联煤层气有限责任公司 | Foam drilling fluid for three-gas open hole exploitation |
| CN112552883B (en) * | 2020-12-16 | 2022-02-01 | 成都西油华巍科技有限公司 | Lifting and cutting agent for solid-free completion fluid workover fluid for oil and gas well and preparation method thereof |
| CN116589988A (en) * | 2023-03-30 | 2023-08-15 | 成都西油华巍科技有限公司 | Weak gel tackifier for drilling fluid and preparation method and use method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088583A (en) * | 1976-12-02 | 1978-05-09 | Union Oil Company Of California | Composition and method for drilling high temperature reservoirs |
| CN101182409B (en) * | 2007-10-27 | 2010-06-02 | 东营泰尔石油技术有限公司 | Anti-collapse circulative micro-foam drilling fluid or well completion fluid |
| CN101643641B (en) * | 2009-06-18 | 2012-05-30 | 东营泰尔石油技术有限公司 | Low solid phase and micro-foam drilling fluid or completion fluid capable of being used circularly |
| CN101649192B (en) * | 2009-06-18 | 2012-05-30 | 东营泰尔石油技术有限公司 | Recycled solidfree micro-foam drilling fluid or completion fluid |
-
2009
- 2009-06-18 CN CN2009100163760A patent/CN101643641B/en active Active
-
2010
- 2010-04-26 CA CA2743637A patent/CA2743637C/en active Active
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820085A (en) * | 2012-11-19 | 2014-05-28 | 北京宝沃石油技术有限责任公司 | Oil layer protective agent for drilling fluid and production method thereof |
| CN103820085B (en) * | 2012-11-19 | 2016-07-06 | 北京宝沃石油技术有限责任公司 | A kind of drilling fluid oil layer protective agent and production method thereof |
| CN106047318A (en) * | 2016-06-23 | 2016-10-26 | 中石化石油工程技术服务有限公司 | Water swelling and plugging material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101643641A (en) | 2010-02-10 |
| CA2743637C (en) | 2016-10-11 |
| CN101643641B (en) | 2012-05-30 |
| WO2010145188A1 (en) | 2010-12-23 |
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