CN114774092A - Drilling protection composition and drilling protection liquid - Google Patents
Drilling protection composition and drilling protection liquid Download PDFInfo
- Publication number
- CN114774092A CN114774092A CN202111539404.4A CN202111539404A CN114774092A CN 114774092 A CN114774092 A CN 114774092A CN 202111539404 A CN202111539404 A CN 202111539404A CN 114774092 A CN114774092 A CN 114774092A
- Authority
- CN
- China
- Prior art keywords
- parts
- drilling
- protection composition
- carboxymethyl cellulose
- solution
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/16—Clay-containing compositions characterised by the inorganic compounds other than clay
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/20—Natural organic compounds or derivatives thereof, e.g. polysaccharides or lignin derivatives
- C09K8/206—Derivatives of other natural products, e.g. cellulose, starch, sugars
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
Abstract
The invention relates to a drilling protection composition and a drilling protection liquid, and belongs to the technical field of drilling fluids. The drilling protection composition provided by the invention comprises a weighting agent and the following components in parts by weight: 1-5 parts of bentonite, 0.1-0.5 part of a zwitterionic polymer coating agent, 0.1-5 parts of a high-molecular coating inhibitor, 0.1-5 parts of acrylamide and sodium acrylate copolymer, 1-5 parts of high-viscosity sodium carboxymethyl cellulose, 5-15 parts of potassium chloride, 1-5 parts of ammonium salt, 1-5 parts of low-viscosity sodium carboxymethyl cellulose, 11-5 parts of a high-temperature-resistant salt-resistant anti-collapse filtrate loss reducer KFH-for drilling fluid, 1-5 parts of sulfonated phenolic resin, 1-5 parts of cationic asphalt powder, 1-5 parts of white asphalt, 1-5 parts of emulsified asphalt, 1-5 parts of white oil, 1-5 parts of emulsified paraffin and 1-5 parts of a solid lubricant. The drilling protection composition can be used for preparing a high-density drilling fluid protection solution with good stability.
Description
Technical Field
The invention relates to a drilling protection composition and a drilling protection liquid, and belongs to the technical field of drilling fluids.
Background
Drilling fluid is the fluid used to clean the cuttings at the bottom of the well during drilling, carry the cuttings to the surface, and maintain the drilling operation. The drilling fluid is mainly used in the following aspects: 1) and (4) removing the rock debris at the bottom of the well. Along with the continuous drilling process, the rock debris drilled at the bottom of the well is carried to the ground by the drilling fluid in time, so that the drilling speed is improved, and the drilling sticking accident is facilitated. 2) Cooling and lubricating the drill bit and drill string. During the drilling process, the drill bit is in friction with formation rock, the drill string is in friction with rock on the open hole well wall to generate heat, and the drilling fluid has lubricating property and absorbs heat. The torque is reduced, the service life of the drill bit is prolonged, the pump pressure is reduced, and the drilling speed is increased. 3) Wall building performance. Because of the pressure difference between the bottom pressure and the stratum pressure, the drilling fluid with good performance forms a filter cake with much lower permeability than the stratum on the well wall, which is beneficial to strengthening the well wall and preventing the exploration of the well wall. 4) The formation pressure is controlled. A drilling fluid of a certain density creates hydrostatic column pressure for balancing or controlling formation pressure. 5) Suspending drill cuttings and weighting material. Good drilling fluids shear after circulation has ceased and have the ability to suspend cuttings and weighting materials, otherwise these solid particles settle down at the bottom of the well, causing repeated grinding and bottom hole sand setting seizing. 6) Data is acquired of the formation being drilled. The rock debris carried by the drilling fluid and oil gas in the drilled well are analyzed, whether the drilled stratum has oil gas resources or not can be judged, and information such as stratum lithology, stratum water property and the like can be obtained. 7) Transferring the water power. Drilling fluid circulation transfers the water power of useful work from the surface to the drill bit and bottom hole assembly. As most drilling fluids belong to heterogeneous non-Newtonian fluids with multiphase dispersion, the flow behavior of the drilling fluids is complex, and the physicochemical-mechanical properties of the fluids are involved. The drilling fluid with different components and different additive proportions has different application effects on different stratums.
At present, the Wegang fault block oil reservoir in the Henan oilfield causes complex geological structure due to large geological motion change, and is longitudinally distributed with factors unfavorable for well drilling, such as high-pressure fluid, gas layers, faults, folds and the like.
Disclosure of Invention
The invention aims to provide a drilling protection composition which can be prepared into a high-density drilling protection solution with good stability.
The invention also provides a drilling protection fluid adopting the drilling protection composition.
In order to achieve the above purpose, the technical scheme adopted by the drilling protection composition is as follows:
the drilling protection composition consists of a weighting agent and the following components in parts by weight: 1-5 parts of bentonite, 0.1-0.5 part of a zwitterionic polymer coating agent, 0.1-0.5 part of a high-molecular coating inhibitor, 0.1-5 parts of acrylamide and sodium acrylate copolymer, 1-5 parts of high-viscosity sodium carboxymethyl cellulose, 5-15 parts of potassium chloride, 1-5 parts of ammonium salt, 1-5 parts of low-viscosity sodium carboxymethyl cellulose, 11-5 parts of a high-temperature-resistant, salt-resistant and anti-collapse filtrate loss reducer KFH-for drilling fluid, 1-5 parts of sulfonated phenolic resin, 1-5 parts of cationic asphalt powder, 1-5 parts of white asphalt, 1-5 parts of emulsified asphalt, 1-5 parts of white oil, 1-5 parts of emulsified paraffin and 1-5 parts of a solid lubricant; the viscosity of the high-viscosity sodium carboxymethyl cellulose salt is 30-36 mPa.s, and the viscosity of the low-viscosity sodium carboxymethyl cellulose salt is 9-15 mPa.s.
The drilling protection composition can be used for preparing a high-density drilling fluid protection solution with good stability. Wherein bentonite plays the effect of making thick liquid, dado at the engineering well drilling in-process, can also play balanced earth's surface pressure, stabilize the effect of the wall of a well and wash the subsidiary detritus of drilling tool, keep the clean and tidy effect of drilling tool, and the adhesion nature of bentonite plays the adhesive action in can permeating the gap of the wall of a well, and the mud liquid of bentonite can suspend the drill chip at the bottom of the hole and carry and take out the well head simultaneously, makes the wall of a well of accomplishing the construction keep clean. The anionic, cationic and nonionic groups of the amphoteric ion polymer coating agent are introduced on the same molecular chain, so that the effects of inhibiting rock debris dispersion and increasing the viscosity of drilling fluid are achieved, the capacity and carrying capacity for resisting rock powder pollution are high, the purification treatment is easy after the rock powder pollution, the content of submicron particles in a system can be reduced, the mechanical drilling speed is favorably improved, a production layer is protected, the cost of drilling mud can be greatly reduced, and the comprehensive economic benefit is improved. The acrylamide and sodium acrylate copolymer can neutralize the suspended particles with positive charges electrically, has strong adsorption and bridging effects, can promote sedimentation, and strengthens solid-liquid separation, and has very obvious flocculation effect. The sodium carboxymethylcellulose has the functions of adhesion, thickening, strengthening, emulsification, water retention, suspension and the like. Potassium chloride and ammonium salts have the effect of preventing clay swelling of the formation. The sulfonated phenolic resin is a temperature-resistant and salt-resistant fluid loss additive for the drilling fluid, is powdery, can resist high temperature and reduce water loss, has the functions of preventing collapse and controlling viscosity, and has good salt resistance. The white oil and the emulsified paraffin drilling fluid play a role in lubrication. The cationic asphalt powder has good water dispersibility, no coalescence and floating phenomena and good shale inhibition, asphalt insoluble substances dispersed in the drilling fluid can be adsorbed on the surface of shale to form a thin and tough hydrophobic oil film with small permeability, formation pores and microcracks can be plugged under the action of pressure difference, the amount of filtrate invading into a formation is reduced, and a cationic group has good inhibition effect, so that the shale is effectively inhibited from hydration and expansion, the shale is prevented from peeling and collapsing, and a well wall is stabilized; the oil-gas reservoir protecting agent has good oil-gas reservoir protecting effect; the viscosity is not increased, and the preparation method is particularly suitable for preparing high-density drilling completion fluid; good thermal stability (>220 ℃).
Preferably, the drilling protection composition consists of a weighting agent and the following components in parts by weight: 1-5 parts of bentonite, 0.1-0.5 part of a zwitterionic polymer coating agent, 0.1-0.5 part of a high-molecular coating inhibitor, 0.1-5 parts of acrylamide and sodium acrylate copolymer, 1-2 parts of high-viscosity sodium carboxymethyl cellulose, 5-15 parts of potassium chloride, 1-5 parts of ammonium salt, 1-5 parts of low-viscosity sodium carboxymethyl cellulose, 1-5 parts of a high-temperature-resistant salt-resistant anti-collapse filtrate loss reducer KFH-11, 1-5 parts of sulfonated phenolic resin, 1-3 parts of cationic asphalt powder, 3-5 parts of white asphalt, 3-5 parts of emulsified asphalt, 1-5 parts of white oil, 3-5 parts of emulsified paraffin and 3-5 parts of a solid lubricant.
Preferably, the solid lubricant is a graphite-based solid lubricant.
Preferably, the ammonium salt is an organic ammonium salt. The organic ammonium salt is preferably hydrolyzed polyacrylonitrile ammonium salt. The advantage of using hydrolyzed ammonium salts of acrylonitrile as organic ammonium salts is NH4the-HPAN is prepared from acrylic fiber by hydrolyzing at high temperature and high pressure, and is light yellow powder containing-COOH, -COONH4、-CONH2CN, etc., with a certain temperature and salt resistance, and NH4+The embedding effect in the shale has certain anti-collapse effect.
Preferably, the weighting agent is barite and/or iron ore. The density of the drilling fluid can be adjusted by taking barite and/or iron ore as a weighting agent. The density of the barite is 4.2g/m3。
Preferably, the weighting agent has a particle size of 200 mesh to 325 mesh.
Preferably, the weight part of the weighting agent is 100-200 parts.
The technical scheme adopted by the drilling protection solution is as follows:
a drilling protection fluid comprising water and the drilling protection composition described above.
The well drilling protection solution can be 1.5-2.5g/cm3The high-density drilling fluid system overcomes the defects of high rheological property adjustment difficulty, high sedimentation stability requirement, high solid phase content, high filter loss of mud cake thickness, high friction coefficient of a shaft and poor capability of resisting rock debris pollution of the conventional high-density drilling fluid.
Preferably, the mass ratio of water to the well protection composition is 100: 117.3-276.5.
Preferably, the preparation method of the drilling protection fluid comprises the following steps:
1) uniformly mixing bentonite, potassium chloride, ammonium salt, a solid lubricant and water, and then preserving heat for 20-30min at 55-65 ℃ to obtain a solution A;
2) uniformly mixing the solution A with cationic asphalt powder, white asphalt, emulsified asphalt, a white oil lubricant, emulsified paraffin and a zwitterionic polymer coating agent to obtain a solution B;
3) putting the solution B into a closed container, pressurizing to 5-10MPa, keeping the temperature of the solution B at 55-65 ℃, then adding a zwitterionic polymer coating agent, a high-molecular coating inhibitor, an acrylamide and sodium acrylate copolymer, high-viscosity sodium carboxymethyl cellulose and low-viscosity sodium carboxymethyl cellulose, and uniformly mixing to obtain a solution C;
4) and adding the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer KFH-1, the sulfonated phenolic resin and the weighting agent into the solution C, and uniformly mixing to obtain the final product.
Further, in the step 1), the blending is to sequentially add bentonite, potassium chloride, ammonium salt and a solid lubricant into water under the condition of stirring the water, and continuously stir the mixture for a period of time. In the step 1), the rotating speed of the stirring is 10000 r/min. The time for continuing stirring in the step 1) is 20 min.
Further, in the step 2), the step of uniformly mixing is to sequentially add the cationic asphalt powder, the white asphalt, the emulsified asphalt, the white oil lubricant, the emulsified paraffin and the zwitterionic polymer coating agent into the solution A under the condition of stirring the solution A, and continuously stirring for a period of time. In the step 2), the rotating speed of the stirring is 10000 r/min. The time for continuing stirring in the step 2) is 20 min. In the step 2), the step of uniformly stirring is to uniformly stir the system at 55-65 ℃.
Further, in the step 3), the step of uniformly mixing is to sequentially add the zwitterionic polymer coating agent, the polymer coating inhibitor, the acrylamide and sodium acrylate copolymer, the high-viscosity sodium carboxymethyl cellulose salt and the low-viscosity sodium carboxymethyl cellulose salt into the solution B under the condition of stirring the solution B, and continuously stirring for a period of time. In the step 3), the rotating speed of stirring is 15000 r/min. The time for continuing stirring in step 3) is 20 min.
Further, in the step 4), the step of uniformly mixing is to sequentially add the high-temperature-resistant, salt-resistant and anti-collapse filtrate loss reducer KFH-1, the sulfonated phenolic resin and the weighting agent into the solution C under the condition of stirring the solution C, and continuously stirring for a period of time. In the step 4), the rotating speed of the stirring is 10000 r/min. The time for continuing stirring in the step 4) is 20 min.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
In the examples and the comparative examples, bentonite, potassium chloride, sulfonated phenolic resin, white asphalt, cationic asphalt powder, emulsified asphalt, white oil lubricant, emulsified paraffin, graphite solid lubricant, low-viscosity sodium carboxymethyl cellulose, high-temperature-resistant salt-resistant anti-collapse filtrate loss reducer KFH-1 for drilling fluid, high-viscosity sodium carboxymethyl cellulose, high-molecular coating inhibitor, acrylamide and sodium acrylate copolymer and zwitterionic polymer coating agent are all commercially available. Wherein the viscosity of the high-viscosity sodium carboxymethyl cellulose is 30-36 mPa.s, and the viscosity of the low-viscosity sodium carboxymethyl cellulose is 9-15 mPa.s.
The high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer KFH-1 is produced by Nippon Toxing mud materials, Inc. The polymer coating inhibitor is a natural polymer strong coating inhibitor purchased from Puyang Xin Yuan environmental protection technology limited company; the zwitterionic polymer coating agent is a strong zwitterionic polymer coating agent FA-367 for well drilling, and is purchased from Longquan chemical plants in Gouyang county.
Example 1
The drilling protection composition of the embodiment comprises the following components in parts by weight: 1 part of bentonite, 0.1 part of a zwitterionic polymer coating agent, 0.1 part of a high-molecular coating inhibitor, 0.1 part of acrylamide and sodium acrylate copolymer, 1 part of high-viscosity sodium carboxymethyl cellulose, 15 parts of potassium chloride, 1 part of ammonium salt, 1 part of low-viscosity sodium carboxymethyl cellulose, a high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer KFH-11 part, 1 part of sulfonated phenolic resin, 1 part of cationic asphalt powder, 5 parts of white asphalt, 5 parts of emulsified asphalt, 5 parts of white oil lubricant, 5 parts of emulsified paraffin, 5 parts of graphite solid lubricant and 100 parts of weighting agent; wherein the adopted weighting agent is barite with the granularity of 200 meshes-325 meshes; the ammonium salt used is hydrolyzed polyacrylonitrile ammonium salt.
Example 2
The drilling protection composition of the embodiment comprises the following components in parts by weight: 3 parts of bentonite, 0.2 part of a zwitterionic polymer coating agent, 0.3 part of a high-molecular coating inhibitor, 0.3 part of acrylamide and sodium acrylate copolymer, 2 parts of high-viscosity sodium carboxymethyl cellulose, 10 parts of potassium chloride, 3 parts of ammonium salt, 2 parts of low-viscosity sodium carboxymethyl cellulose, 3 parts of a high-temperature-resistant salt-resistant anti-collapse filtrate reducer KFH-13, 3 parts of sulfonated phenolic resin, 3 parts of cationic asphalt powder, 3 parts of white asphalt, 3 parts of emulsified asphalt, 3 parts of a white oil lubricant, 3 parts of emulsified paraffin, 3 parts of a graphite solid lubricant and 110 parts of a weighting agent; wherein the adopted weighting agent is iron ore with the granularity of 200 meshes-325 meshes; the ammonium salt used is hydrolyzed polyacrylonitrile ammonium salt.
Example 3
The drilling protection composition of the embodiment comprises the following components in parts by weight: 5 parts of bentonite, 0.5 part of a zwitterionic polymer coating agent, 0.5 part of a high-molecular coating inhibitor, 5 parts of acrylamide and sodium acrylate copolymer, 1 part of high-viscosity sodium carboxymethyl cellulose, 5 parts of potassium chloride, 5 parts of ammonium salt, 5 parts of low-viscosity sodium carboxymethyl cellulose, 5 parts of a high-temperature-resistant salt-resistant anti-collapse filtrate reducer KFH-15 parts, 5 parts of sulfonated phenolic resin, 1 part of cationic asphalt powder, 5 parts of white asphalt, 5 parts of emulsified asphalt, 5 parts of a white oil lubricant, 5 parts of emulsified paraffin, 5 parts of a graphite solid lubricant and 200 parts of a weighting agent; wherein the adopted weighting agent is a mixture of barite and iron ore, and the granularity is 200 meshes-325 meshes; the ammonium salt used is hydrolyzed polyacrylonitrile ammonium salt.
Example 4
The well protection composition of this example differs from the well protection composition of example 1 only in that: in the embodiment, the weight part of the weighting agent is 120 parts, the weighting agent consists of barite and iron ore, and the mass ratio of the barite to the iron ore is 100: 20.
Example 5
The well protection composition of this example, which differs from the well protection composition of example 1 only in that: in the embodiment, the weight portion of the weighting agent is 150 parts, the weighting agent consists of barite and iron ore, and the mass ratio of the barite to the iron ore is 120: 30.
Example 6
The well protection composition of this example, which differs from the well protection composition of example 1 only in that: in the embodiment, the weight percentage of the weighting agent is 200 parts, the weighting agent consists of barite and iron ore, and the mass ratio of the barite to the iron ore is 20: 180.
Example 7
The drilling protection fluid of the present example consists of water and the drilling protection composition of example 1; the mass ratio of water to the well protection composition was 100: 146.4.
The drilling protection fluid of the embodiment is prepared by adopting a method comprising the following steps:
1) taking the components of the well protection composition in a formula amount;
putting clear water into a stirrer, controlling the rotating speed of the stirrer to 10000r/min, sequentially adding bentonite, potassium chloride, ammonium salt and graphite solid lubricant, and continuously stirring for 20min after adding to obtain a solution A;
2) heating the solution A to 60 ℃, keeping the temperature at constant temperature for 25min, then controlling the rotating speed of a stirrer to 10000r/min, sequentially adding cationic asphalt powder, white asphalt, emulsified asphalt, a white oil lubricant, emulsified paraffin and a zwitterionic polymer coating agent into the solution A, and stirring for 20min continuously until the solution is sticky to obtain a solution B;
3) placing the prepared solution B in a closed container, pressurizing to 7.5MPa, controlling the temperature of the solution B to be kept at 60 ℃, sequentially adding a zwitterionic polymer coating agent, a high-molecular coating inhibitor, an acrylamide and sodium acrylate copolymer, high-viscosity sodium carboxymethyl cellulose and low-viscosity sodium carboxymethyl cellulose into the solution B under the condition of stirring the solution B at the rotating speed of 15000r/min, and continuously stirring for 20min after the addition is finished to obtain a solution C;
4) and sequentially adding the high-temperature-resistant, salt-resistant and anti-collapse filtrate reducer KFH-1, the sulfonated phenolic resin and the weighting agent into the solution C under the condition of stirring the solution C at the rotating speed of 10000r/min, and continuously stirring for 20min after finishing adding the weighting agent to obtain the finished product.
The density of the drilling protection fluid of the embodiment is 1.5g/cm3。
Example 8
The drilling protection fluid of the present example consists of water and the drilling protection composition of example 2; the mass ratio of water to the well protection composition was 100: 146.5.
The method for preparing the drilling protection fluid of the embodiment is different from the method for preparing the drilling protection fluid of the embodiment 7 only in that, except that the drilling protection composition adopted is the drilling protection composition of the embodiment 2, the mass ratio of water to the drilling protection composition is 100: 146.5: in the step 2), keeping the temperature for 20min at constant temperature; in step 3), the pressure is increased to 5MPa during pressurization.
The density of the drilling protection fluid of the present example was 1.6g/cm3。
Example 9
The drilling protection fluid of this example consists of water and the drilling protection composition of example 3; the mass ratio of water to well protection composition was 100: 237.3.
The method for preparing the drilling protection fluid of the embodiment is different from the method for preparing the drilling protection fluid of the embodiment 7 only in that, except that the drilling protection composition adopted is the drilling protection composition of the embodiment 3, the mass ratio of water to the drilling protection composition is 100: 237.3: in the step 2), keeping the temperature for 30 min; in step 3), the pressure is increased to 10MPa during pressurization.
The density of the drilling protection fluid of the embodiment is 1.7g/cm3。
Example 10
The drilling protection fluid of this example consists of water and the drilling protection composition of example 4; the mass ratio of water to the well protection composition was 100: 166.4. The preparation method of the drilling protection fluid of the embodiment is different from the preparation method of the drilling protection fluid of the embodiment 7 only in that: adding 100 parts by weight of the components added in the step 4)The heavy agent was replaced with 120 parts by weight of a heavy agent composed of barite and iron ore (the mass ratio of barite to iron ore was 100: 20). The density of the drilling protection fluid of the embodiment is 2.05g/cm3。
Example 11
The drilling protection fluid of this example consists of water and the drilling protection composition of example 5; the mass ratio of water to well protection composition was 100: 196.4. The method for preparing the drilling protection fluid of the embodiment is different from the method for preparing the drilling protection fluid of the embodiment 7 only in that: replacing 100 parts by weight of the weighting agent added in the step 4) with 150 parts by weight of the weighting agent consisting of barite and iron ore (the mass ratio of the barite to the iron ore is 120: 30). The density of the drilling protection fluid of the embodiment is 2.30g/cm3。
Example 12
The drilling protection fluid of this example consists of water and the drilling protection composition of example 6; the mass ratio of water to the well protection composition was 100: 246.4. The preparation method of the drilling protection fluid of the embodiment is different from the preparation method of the drilling protection fluid of the embodiment 7 only in that: replacing 100 parts by weight of the weighting agent added in the step 4) with 120 parts by weight of the weighting agent consisting of barite and iron ore (the mass ratio of the barite to the iron ore is 20: 180). The density of the drilling protection fluid of the embodiment is 2.50g/cm3。
Comparative example 1
The drilling protection fluid of the comparative example consists of the following components in parts by weight: 100 parts of water, 2 parts of bentonite, 0.2 part of soda ash, 0.8 part of a high polymer coating inhibitor, 1 part of RT-1, 2 parts of HFT, 1 part of ammonium salt, 3 parts of white oil, 2 parts of emulsified paraffin, 0.5-0.8 part of DSP, 1 part of GF-2 and 120 parts of weighting agent; wherein the weighting agent is iron ore, and the ammonium salt is hydrolyzed polyacrylonitrile ammonium salt. When the drilling protection solution of the comparative example is prepared, the components in the formula amount are uniformly mixed to obtain the drilling protection solution. The drilling protection fluid of this comparative example had a density of 2.05g/cm3。
Comparative example 2
The drilling protection fluid of the comparative example consists of the following components in parts by weight: 100Water, 2 parts of bentonite, 0.2 part of soda ash, 0.8 part of a polymer coating inhibitor, 1 part of RT-1, 2 parts of HFT, 1 part of ammonium salt, 3 parts of white oil, 2 parts of emulsified paraffin, 0.5-0.8 part of DSP, 1 part of GF-2 and 150 parts of weighting agent; wherein the weighting agent is iron ore, and the ammonium salt is hydrolyzed polyacrylonitrile ammonium salt. When the drilling protection fluid of the comparative example is prepared, the components in the formula are uniformly mixed to obtain the drilling protection fluid. The drilling protection fluid of this comparative example had a density of 2.50g/cm3。
The RT-1, HFT, DSP and GF-2 used in the above comparative examples 1-2 were all commercially available products, wherein RT-1 was graphite RT-1, a solid lubricant for drilling fluid, purchased from Toxing mud materials Co., Ltd, HFT was cationic emulsified asphalt HFT, purchased from Hao oil science and technology Co., Ltd, in Henan, DSP was a high temperature high salt filtrate reducer, purchased from continental shelf oil engineering technology Co., Ltd, and GF-2 was a multifunctional shielding temporary plugging agent, purchased from continental shelf oil engineering technology Co., Ltd, in Tex.
Experimental example 1
The drilling protection fluids of examples 10-12 and comparative examples 1-2 were subjected to rheological property tests according to GB/T29170-2012 laboratory test for drilling fluids in the petroleum and gas industry.
The test results are shown in Table 1.
TABLE 1 rheology evaluation
As can be seen from the data in Table 1, the drilling fluid prepared from the drilling protective composition of example 1 has better rheological property and fluid loss wall-building property after being hot rolled for 16 hours at a high temperature of 120 ℃, the rheological property is in a reasonable range, and the rock carrying capacity is better.
Experimental example 2
The drilling protection liquid and the clean water in the embodiments 10-12 are respectively taken to perform a rock debris rolling recovery rate test and an expansion test by referring to GB/T29170 and 2012 'Petroleum and Natural gas industry drilling liquid laboratory test'.
Rock debris rolling recovery rate experiment: aging conditions are as follows: 16 h.times.120 ℃, measurement temperature: and (4) room temperature.
Dilatability test: 10g of field rock debris sieved by a 100-mesh sieve is taken, dried at 105 ℃, pressed for 5min under 12MPa, and measured for the expansion rate of the rock debris in the filtrate at 120 ℃ and 3.5MPa in different times by using a CLPZ-2 high-temperature high-pressure intelligent expansion instrument.
The test results are shown in Table 2.
TABLE 2 evaluation of inhibitory Properties
As can be seen from the data in table 2: the recovery rate of rock debris is only 6.2 percent, which shows that the rock sample has stronger hydration capability, and the high-density drilling fluid system reaches 86.98-87.3 percent; the linear expansion rate of the high-density drilling fluid system is only about 8.2 percent; the drilling protection fluid system of the embodiment has strong inhibition, effectively inhibits the hydration dispersion and expansion of clay minerals, and maintains the stability of the well wall.
Experimental example 3
The mud cake viscosity coefficients and the E-P lubrication coefficients of the drilling protection composite fluids of examples 10-12 and comparative examples 1-2 were determined according to GB/T29170-2012 laboratory test for oil and gas industry drilling fluids, respectively, and the results are shown in Table 3.
TABLE 3 evaluation of lubricity
As can be seen from the data in Table 3, the drilling protection fluid using the drilling protection composition of example 1 has a mudcake coefficient of friction and an E-P coefficient of lubricity of less than 0.1, which indicates better lubricity.
Experimental example 4
The drilling protection fluids of example 9 and comparative example 2 were subjected to anti-debris contamination experiments according to GB/T29170-. In the anti-rock debris pollution experiment, on-site rock debris is taken as a sample, and the aging condition is 16h multiplied by 120 ℃; the measurement temperature was room temperature, and the test results are shown in Table 4.
TABLE 4 evaluation of anti-contamination ability
As can be seen from the data in Table 4, the viscous shear of the system gradually increases with the increase of the drill cuttings, but the rising amplitude is smaller, and the rheological property is more stable. When the addition amount of the drill cuttings is 5%, the rising rate of the dynamic shear force YP is 14.3%; therefore, the system has stronger bad solid phase pollution resistance.
Experimental example 5
The experimental example evaluates the sedimentation stability of the drilling protection liquid of examples 10-12 and comparative examples 1-2 according to GB/T29170 and 2012 laboratory test for drilling liquid in petroleum and gas industry.
The test results are shown in Table 5.
TABLE 5 sedimentation stability evaluation
As can be seen from the data in Table 5, after the drilling protection fluid of the experimental sample is static for 24 hours, the density change of the drilling fluid of the experimental sample is smaller than that of the drilling fluid of the control sample, which indicates that the system has good sedimentation stability and stronger suspension capacity of the drilling fluid.
Claims (10)
1. A well protection composition characterized by: the weight-increasing agent consists of the following components in parts by weight: 1-5 parts of bentonite, 0.1-0.5 part of a zwitterionic polymer coating agent, 0.1-0.5 part of a high-molecular coating inhibitor, 0.1-5 parts of acrylamide and sodium acrylate copolymer, 1-5 parts of high-viscosity sodium carboxymethyl cellulose, 5-15 parts of potassium chloride, 1-5 parts of ammonium salt, 1-5 parts of low-viscosity sodium carboxymethyl cellulose, 11-5 parts of a high-temperature-resistant, salt-resistant and anti-collapse filtrate loss reducer KFH-for drilling fluid, 1-5 parts of sulfonated phenolic resin, 1-5 parts of cationic asphalt powder, 1-5 parts of white asphalt, 1-5 parts of emulsified asphalt, 1-5 parts of white oil, 1-5 parts of emulsified paraffin and 1-5 parts of a solid lubricant; the viscosity of the high-viscosity sodium carboxymethyl cellulose is 30-36 mPa.s, and the viscosity of the low-viscosity sodium carboxymethyl cellulose is 9-15 mPa.s.
2. The well protection composition of claim 1, wherein: the solid lubricant is a graphite solid lubricant.
3. The wellbore protection composition of claim 1, wherein: the ammonium salt is an organic ammonium salt.
4. The wellbore protection composition of claim 3, wherein: the organic ammonium salt is hydrolyzed polyacrylonitrile ammonium salt.
5. The well protection composition of claim 1, wherein: the weighting agent is barite and/or iron ore.
6. The wellbore protection composition of claim 5, wherein: the particle size of the weighting agent is 200 meshes-325 meshes.
7. The well protection composition of claim 1, wherein: the weight part of the weighting agent is 100-200 parts.
8. A drilling protection fluid, comprising: comprising water and a well protection composition as claimed in any one of claims 1 to 7.
9. The wellbore protection fluid of claim 8, wherein: the mass ratio of water to the well protection composition is 100: 117.3-276.5.
10. Drilling protection fluid according to claim 8 or 9, characterized in that: the preparation method comprises the following steps:
1) uniformly mixing bentonite, potassium chloride, ammonium salt, a solid lubricant and water, and then preserving heat at 55-65 ℃ for 20-30min to obtain a solution A;
2) uniformly mixing the solution A with cationic asphalt powder, white asphalt, emulsified asphalt, a white oil lubricant, emulsified paraffin and a zwitterionic polymer coating agent to obtain a solution B;
3) putting the solution B into a closed container, pressurizing to 5-10MPa, keeping the temperature of the solution B at 55-65 ℃, then adding a zwitterionic polymer coating agent, a high-molecular coating inhibitor, an acrylamide and sodium acrylate copolymer, high-viscosity sodium carboxymethyl cellulose and low-viscosity sodium carboxymethyl cellulose, and uniformly mixing to obtain a solution C;
4) and adding the high-temperature-resistant salt-resistant anti-collapse filtrate reducer KFH-1, the sulfonated phenolic resin and the weighting agent into the solution C, and uniformly mixing to obtain the composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111539404.4A CN114774092B (en) | 2021-12-15 | 2021-12-15 | Drilling protection composition and drilling protection liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111539404.4A CN114774092B (en) | 2021-12-15 | 2021-12-15 | Drilling protection composition and drilling protection liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114774092A true CN114774092A (en) | 2022-07-22 |
| CN114774092B CN114774092B (en) | 2023-09-22 |
Family
ID=82424154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111539404.4A Active CN114774092B (en) | 2021-12-15 | 2021-12-15 | Drilling protection composition and drilling protection liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114774092B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148579A (en) * | 2007-10-27 | 2008-03-26 | 东营泰尔石油技术有限公司 | High temperature resistant circulating micro-foam drilling fluid or completion fluid |
| CN101851492A (en) * | 2009-08-14 | 2010-10-06 | 新疆德蓝股份有限公司 | High-temperature high-pressure salt-resistant high-density drilling fluid |
| CN103642473A (en) * | 2013-12-19 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Polymer saturated salt water drilling solution suitable for drilling gas storage warehouse |
| US9399692B1 (en) * | 2015-02-06 | 2016-07-26 | China University Of Petroleum (Beijing) | Amphiphilic reservoir protecting agent and preparation method thereof and drilling fluid |
| CN107652952A (en) * | 2017-09-27 | 2018-02-02 | 中石化石油工程技术服务有限公司 | A kind of high performance water-based drilling fluid of suitable shale gas long horizontal sections and preparation method thereof |
| CN109321217A (en) * | 2017-08-01 | 2019-02-12 | 克拉玛依友联实业有限责任公司 | A kind of environment-friendly type high performance water-base drilling fluid and preparation method thereof |
| CN113583638A (en) * | 2021-09-13 | 2021-11-02 | 洲际海峡能源科技有限公司 | Calcium-based saline water polymer strong-inhibition environment-friendly drilling fluid base fluid, drilling fluid and preparation and application thereof |
-
2021
- 2021-12-15 CN CN202111539404.4A patent/CN114774092B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148579A (en) * | 2007-10-27 | 2008-03-26 | 东营泰尔石油技术有限公司 | High temperature resistant circulating micro-foam drilling fluid or completion fluid |
| CN101851492A (en) * | 2009-08-14 | 2010-10-06 | 新疆德蓝股份有限公司 | High-temperature high-pressure salt-resistant high-density drilling fluid |
| CN103642473A (en) * | 2013-12-19 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Polymer saturated salt water drilling solution suitable for drilling gas storage warehouse |
| US9399692B1 (en) * | 2015-02-06 | 2016-07-26 | China University Of Petroleum (Beijing) | Amphiphilic reservoir protecting agent and preparation method thereof and drilling fluid |
| CN109321217A (en) * | 2017-08-01 | 2019-02-12 | 克拉玛依友联实业有限责任公司 | A kind of environment-friendly type high performance water-base drilling fluid and preparation method thereof |
| CN107652952A (en) * | 2017-09-27 | 2018-02-02 | 中石化石油工程技术服务有限公司 | A kind of high performance water-based drilling fluid of suitable shale gas long horizontal sections and preparation method thereof |
| CN113583638A (en) * | 2021-09-13 | 2021-11-02 | 洲际海峡能源科技有限公司 | Calcium-based saline water polymer strong-inhibition environment-friendly drilling fluid base fluid, drilling fluid and preparation and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张毅;李竞;熊雄;杜亚龙;张顶有;陶东梅;: "莫深1井抗高温高密度KDF水基钻井液室内研究", 钻井液与完井液, no. 02 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114774092B (en) | 2023-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2125274C (en) | Drilling mud additive | |
| US4579668A (en) | Well servicing agents and processes | |
| CA2689630C (en) | The use of sized barite as a weighting agent for drilling fluids | |
| US11168240B2 (en) | Hydrobically treated particulates for improved return permeability | |
| CN101765696B (en) | Method of completing a well with sand screens | |
| CN110628398B (en) | Water-based drilling fluid for shale gas well and production method thereof | |
| CA2924404A1 (en) | Additives for controlling lost circulation and methods of making and using same | |
| EP0616660A1 (en) | Method of propagating a hydraulic fracture using fluid loss control particulates | |
| CA2599085A1 (en) | Lubricating agent and method for improving lubricity in a drilling system | |
| AU2009275203A1 (en) | Method of gravel packing a well containing synthetic or oil-based drilling fluids | |
| CN111793483B (en) | Environment-friendly anti-collapse plugging drilling fluid and preparation method and application thereof | |
| CA2017834A1 (en) | Method for controlling lost circulation in well drilling | |
| CN106010484A (en) | Strong-inhibition polyether polyol drilling fluid | |
| CN108949127B (en) | Low solid phase superhigh temperature water-base drilling fluid and its prepn | |
| CA2684264C (en) | Reduced abrasion drilling fluid | |
| EP1853685A1 (en) | Additive for reducing torque on a drill string | |
| Özkan et al. | Investigation of fly ash effect on rheological and filtration properties of drilling muds | |
| CN108504339A (en) | A kind of water-base drilling fluid and its preparation method and application suitable for compact oil reservoir | |
| CN115595127B (en) | Deep water shallow gas hydrate multi-layer joint production drilling fluid system and hydrate inhibition performance regulation and control method | |
| CN114774092A (en) | Drilling protection composition and drilling protection liquid | |
| CA2999198A1 (en) | Hydrophobically-treated particulates for improved fluid rheology | |
| Binqiang et al. | A Novel Strong Inhibition Water-Based Drilling Fluid Technology | |
| Jie | Performance evaluation and field application of new water-based drilling fluid system in protecting shale gas reservoir | |
| CA3139114A1 (en) | Cationic and anionic shale inhibitors and clay stabilizers | |
| CN114456779A (en) | High-temperature-resistant desulfonation low-friction drilling fluid and preparation method thereof |
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 |