CN105969327B - A kind of plugging material and leak stopping slurry for protecting low pressure fracture-type reservoir - Google Patents
A kind of plugging material and leak stopping slurry for protecting low pressure fracture-type reservoir Download PDFInfo
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- CN105969327B CN105969327B CN201610383770.8A CN201610383770A CN105969327B CN 105969327 B CN105969327 B CN 105969327B CN 201610383770 A CN201610383770 A CN 201610383770A CN 105969327 B CN105969327 B CN 105969327B
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
-
- 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
- C09K2208/04—Hulls, shells or bark containing well drilling or treatment fluids
-
- 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
- C09K2208/08—Fiber-containing well treatment fluids
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- 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
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
Abstract
The invention discloses a kind of plugging materials and leak stopping slurry for protecting low pressure fracture-type reservoir, which includes the component of following parts by weight: 5~6 parts of walnut shell, 2~3 parts of compound leakage stop agent, 1.5~2 parts of drill-feeding plugging agent, molten 4~5 parts of the sealing agent of acid, 4~5 parts of high dehydration sealing agent, 0.2~0.3 part of calcium oxide.The present invention is matched according to a certain percentage by natural plants inert material, fiber sealing agent and the molten sealing agent of acid, it is mixed to form the molten plugging material of acid with particle and threadiness, both had the characteristics that the bridging action of bridge material was good, leak stopping success rate is high, active balance strata pressure low but also with density, the feature that reservoir damage is small, seal-off effect is strong, theobromine is molten；Have many advantages, such as that density is low, bearing capacity is high, severe mud losses plugging effect is good, acid-soluble ratio is high using the leak stopping slurry that the plugging material adds water to prepare, extemporaneous preparation simple process, construction safety are reliable；It can reach and reduce leakage loss, protect reservoir purpose.
Description
Technical field
The invention belongs to oil drilling leakage stopping technology fields, and in particular to a kind of leak stopping for protecting low pressure fracture-type reservoir
Material also relates to a kind of leak stopping slurry for protecting low pressure fracture-type reservoir.
Background technique
Leakage is to cause to flow in well when head of liquid is greater than formation fracture pressure or drilling strata hole, crack in pit shaft
Body enters stratum on a large scale, be in drilling engineering it is most commonly seen be also be most difficult to thoroughly solve the problems, such as, once pit shaft in split
The leakage of seam property, is not only delayed the drillng operation time, extends drilling period, causes huge economic loss, and consolidating in mud
Phase particle (considering to be worth doing including clay, heavy weight additive, inorganic agent and jig drill) can heap at the narrower venturi of the gas channel of reservoir, and
Part flow passage, which is blocked or is deposited on above cell walls, makes channel become smaller, and pollutes reservoir, reduces oil gas flow.
Domestic and international currently used Fractured plugging material is mainly three categories, i.e., granular material, fibrous material and
Flaky material, mainly by building bridge in leakage points or directly the principle filled achievees the purpose that leak stopping.Partial size is broadly divided into
It is carse, medium and small, if Reservoir Section is missed, using the molten plugging material of theobromine, reduce the pollution to reservoir.Such as the prior art
In, CN103160262B discloses a kind of oil reservoir fracture plugging agent, and main component includes the ingredient of following weight percent:
Theobromine soluble fiber material 10-20%, degradable macromolecule compound 5-15%, can the molten inert particle material 25-35% of oil, can
Delayed expansion agent 4-5%, the molten inorganic salts 28-35% of theobromine, the surplus of degrading are water；It is described can the molten inert particle material of oil be
The oil dispersible asphalt that downhole temperature can soften；The fibre length is 5-25mm, diameter 0.5-1.5mm；The inert particle material
Material diameter is 1-6mm；The inorganic salt particle diameter is 200 mesh and 3-4mm；The composition of the fibrous material are as follows: length 15-
25mm theobromine soluble fiber 60-75%, length are more than or equal to 5mm to less than 15mm theobromine soluble fiber 25-40%；The inertia
The composition of material are as follows: particle diameter 1-1.5mm oil dispersible asphalt 45-55%, particle diameter 2-3mm oil dispersible asphalt 25-30%
With particle diameter 5-6mm oil dispersible asphalt 20-25%；The composition of the inorganic salts are as follows: 200 mesh ultrafine calcium particle 65-85%, 3-
4mm calcium carbonate granule 15-35%.The permanent plugging that above-mentioned sealing agent can prevent oil-gas Layer from may occur is particularly suitable for diving
Mountain fracture-type reservoir.
But for low pressure fracture-type reservoir, existing plugging material is faced with following problem: on the one hand by
Big in wastage, plugging material particle size range is big, and there is certain blindness for plugging material compounding, leads to leak stopping success rate
It is low；On the other hand, since reservoir pressure gradient is low, plugging material easily aggravates the destruction of stratum balance pressure, increases fluid column static pressure
Power increases intrinsic fracture width, aggravates leakage degree；The third aspect, it is difficult in the de-plugging operation of reservoir reconstruction stage, reservoir is made
At pollution.
Summary of the invention
The object of the present invention is to provide a kind of plugging materials for protecting low pressure fracture-type reservoir, in low pressure low porosity and low permeability oil gas
Reservoir has the performance of good seal-off effect, acid-soluble ratio and equilibrium strata pressure.
A second object of the present invention is to provide a kind of leak stopping slurries for protecting low pressure fracture-type reservoir.
In order to achieve the goal above, the technical scheme adopted by the invention is that:
A kind of plugging material for protecting low pressure fracture-type reservoir, the component including following parts by weight: 5~6 parts of walnut shell,
2~3 parts of compound leakage stop agent, 1.5~2 parts of drill-feeding plugging agent, molten 4~5 parts of the sealing agent of acid, 4~5 parts of high dehydration sealing agent, oxidation
0.2~0.3 part of calcium.
The granularity of the walnut shell is 5~20 mesh.
It is the walnut shell of 7~20 mesh that the walnut shell, which is by granularity, and walnut shell that granularity is 5~7 mesh is according to mass ratio
What the ratio of 1:1 was mixed.Walnut shell is a kind of natural plants inert material, is graininess.Walnut shell belongs to a kind of bridge blinding
Material has the advantages that economic, easy to use, construction safety, can solve the partial loss as caused by hole and crack
Leakage is returned with mistake.
The compound leakage stop agent is the drilling fluid of Lingshou County Heng Xin, Hebei Shijiazhuang petroleum assistant Co., Ltd production with again
Close sealing agent, model are as follows: FD-2.
The drill-feeding plugging agent is rigid drill-feeding plugging agent.The rigidity drill-feeding plugging agent is that study industry limited for Jingzhou City
The drilling well of company's production rigid drill-feeding plugging agent, model are as follows: GXD (the rigid sealing agent of drilling fluid).
It according to mass ratio is 1:1 that the molten sealing agent of acid, which is the fine grained molten shielding diverting agent of acid and the molten sealing agent of middle partic acid,
Ratio be mixed.The sour molten shielding diverting agent of the fine grained and the molten sealing agent of middle partic acid are the prosperous mine of Hebei Lingshou County China
The molten sealing agent of acid of product process plants, the wherein molten shielding diverting agent model of fine grained acid are as follows: (multi-functional shielding is temporary by RFD-1
Blocking agent), the middle molten sealing agent model of partic acid are as follows: RFD-2 (acid-soluble high efficient plugging agent).
The high dehydration sealing agent is the high dehydration sealing agent of Chengdu auspicious the lucky star chemical industry Co., Ltd production, model
Are as follows: R-19 (the high molten sealing agent of dehydration peracid).
The plugging material of above-mentioned protection low pressure fracture-type reservoir the preparation method comprises the following steps: by each component raw material be uniformly mixed i.e.
?.
A kind of leak stopping slurry of the plugging material using above-mentioned protection low pressure fracture-type reservoir, by the group of following parts by weight
It is grouped as: 5~6 parts of walnut shell, 2~3 parts of compound leakage stop agent, 1.5~2 parts of drill-feeding plugging agent, molten 4~5 parts of the sealing agent of acid, high mistake
4~5 parts of water sealing agent, 0.2~0.3 part of calcium oxide, 100 parts of water.
The leak stopping slurry of above-mentioned protection low pressure fracture-type reservoir the preparation method comprises the following steps: by each component raw material than water
Be added to the water, be uniformly mixed to obtain the final product.
The plugging material of protection low pressure fracture-type reservoir of the invention, mainly by walnut shell, compound leakage stop agent, plugging while drilling
Agent, the molten sealing agent of acid, high dehydration sealing agent are compounded with calcium oxide, pass through natural plants inert material (walnut shell), fiber leak stopping
Agent and the molten sealing agent of acid match according to a certain percentage, are mixed to form the molten plugging material of acid with particle and threadiness, are bridging
The sealing agent of protection low pressure fracture-type reservoir is formed on the basis of plugging material, both the bridging action with bridge material was good, stifled
Leak the features such as success rate is high, active balance strata pressure low but also with density, the spy that reservoir damage is small, seal-off effect is strong, theobromine is molten
Point.
The plugging material of protection low pressure fracture-type reservoir of the invention, density itself is low, makes it in low pressure low porosity and low permeability oil
Gas reservoir has the ability of good seal-off effect, acid-soluble ratio and equilibrium strata pressure, can preferably solve the leakage of fracture-type reservoir
Problem and reservoir pollution is reduced to greatest extent；Mainly for the severe mud losses of low pressure fractured reservoir, can equilibrium strata pressure,
Leak stopping success rate is improved, reservoir is effectively protected, is better than other class sealing agents.
The leak stopping slurry for adding water to prepare using above-mentioned plugging material, with density is low, bearing capacity is high, severe mud losses block
The advantages that effect is good, acid-soluble ratio is high, and extemporaneous preparation simple process, construction safety are reliable；It can reach and reduce leakage loss, protection
Reservoir purpose；Formula is simple, strong applicability, is suitble to promote and apply.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
In specific embodiment, compound leakage stop agent used is Lingshou County Heng Xin, Hebei Shijiazhuang petroleum assistant Co., Ltd
The drilling fluid compound leakage stop agent of production, model are as follows: FD-2.
The rigidity drill-feeding plugging agent is the rigid drill-feeding plugging agent of drilling well that Jingzhou City studies Industrial Co., Ltd.'s production,
Model are as follows: GXD (the rigid sealing agent of drilling fluid).
The sour molten shielding diverting agent of the fine grained and the molten sealing agent of middle partic acid are the prosperous mineral products processing of Hebei Lingshou County China
The molten sealing agent of acid of factory's production, the wherein molten shielding diverting agent model of fine grained acid are as follows: RFD-1 (multi-functional shielding diverting agent), in
The molten sealing agent model of partic acid are as follows: RFD-2 (acid-soluble high efficient plugging agent).
The high dehydration sealing agent is the high dehydration sealing agent of Chengdu auspicious the lucky star chemical industry Co., Ltd production, model
Are as follows: R-19 (the high molten sealing agent of dehydration peracid).
Embodiment 1
The leak stopping slurry of the protection low pressure fracture-type reservoir of the present embodiment, is composed of the following parts by weight: 2 parts
Granularity is the walnut shell of 7-20 mesh, 3 parts of granularity is the walnut shell of 5-7 mesh, 2 parts of compound leakage stop agent FD-2,1.5 parts of drilling well
With rigid drill-feeding plugging agent GXD, the molten shielding diverting agent RFD-1 of 3 parts of fine grained acid, the molten sealing agent RFD- of 2 parts of middle partic acid
2,4 parts of high dehydration sealing agent R-19,0.3 part of calcium oxide, 100 parts of water.
The leak stopping slurry the preparation method comprises the following steps: each component raw material than water is added to the water, be uniformly mixed to obtain the final product.
Embodiment 2
The leak stopping slurry of the protection low pressure fracture-type reservoir of the present embodiment, is composed of the following parts by weight: 3 parts
Granularity is the walnut shell of 7-20 mesh, 3 parts of granularity is the walnut shell of 5-7 mesh, 3 parts of compound leakage stop agent FD-2,2 parts of drilling well use
Rigid drill-feeding plugging agent GXD, the molten shielding diverting agent RFD-1 of 2 parts of fine grained acid, the molten sealing agent RFD-2 of 2 parts of middle partic acid, 5
The high dehydration sealing agent R-19 of part, 0.2 part of calcium oxide, 100 parts of water.
The leak stopping slurry the preparation method comprises the following steps: each component raw material than water is added to the water, be uniformly mixed to obtain the final product.
Experimental example 1 (laboratory experiment)
This experimental example detects the leak stopping performance of the leak stopping slurry of embodiment 2.
Experimental method is as follows:
1) water for taking formula ratio sequentially adds soda ash, sodium slope soil, high-viscosity sodium carboxymethyl cellulose (HV-CMC), poly- third
Olefin(e) acid potassium (K-PAM), high-speed stirred 10h stand to sealing after mixing and obtain base slurry for 24 hours；
In base slurry, relative to the water of 100 parts by weight, the dosage of soda ash is 0.3 parts by weight, and the dosage of sodium slope soil is 5 weight
Part, the dosage of HV-CMC is 0.3 parts by weight, and the dosage of K-PAM is 0.3 parts by weight；
2) walnut shell, compound leakage stop agent, drill-feeding plugging agent, the molten leak stopping of acid of formula ratio are added in the slurry of the base obtained by step 1)
Agent, high dehydration sealing agent, calcium oxide, mix to obtain experimental slurries.
Testing result is as shown in table 1.
The leak stopping performance test results of the leak stopping slurry of 1 embodiment 2 of table
Experimental example 2
This experimental example is to 2 gained leak stopping slurry of components (single-item handling agent) various in plugging material of the invention and embodiment
Acid-soluble ratio experiment is carried out, the design parameter of every inorganic agent and leak stopping slurry acid-soluble ratio is obtained, as shown in the following table 2, table 3.
Each single-item handling agent acid-soluble ratio of table 2 shows data
3 embodiment of table, 2 gained leak stopping slurry acid-soluble ratio shows data
From table 2,3 as can be seen that in leak stopping slurry most of component acid-soluble ratio all 90% or more, walnut shell acid-soluble ratio compared with
It is low；And the acid-soluble ratio of 2 gained leak stopping slurry of embodiment can effectively reduce reservoir pollution degree up to 81.76%, and for low
Stratum is pressed, the density only 1.0g/cm of leak stopping slurry is prepared3, density is low, can active balance strata pressure.
Experimental example 3 (field test)
The oil field Jing He extends group leader 8 and belongs to low pressure fracture-type reservoir, due to being influenced by tectonic movement, strata pressure
Coefficient 0.88, formation pore, crack, tomography are generally developed, and are lost the property returned leakage in drilling process frequent occurrence, are not only influenced drilling well
Operation is normally carried out, and often derives other kinds of down hole problem, may cause well slough, bit freezing when serious
Even wellbore such as scraps at the serious accidents, seriously restricts the exploration and development progress in the oil field Jing He.Reality is tested in 2 mouthfuls of wells of the block
The leak stopping slurry for protecting low pressure fracture-type reservoir obtained by example 2 is applied, achieves significant effect, leak stopping success rate 100%, and effectively
Protect oil-gas Layer.
JH2-1 well loses the property returned leakage in 1590 meters of generations of Reservoir Section, using protection low pressure fracture-type reservoir obtained by embodiment 2
Leak stopping slurry leak stopping, ground prepare leak stopping slurry 38m3, leak stopping slurry is replaced to drop ply position.During note replaces, adhere to living
Dynamic drilling tool, prevents bit freezing；After having infused plugging drilling fluid, then drilling tool mentioned at the top of drop ply, rises and be drilled into tri- valves circulations of 1000m
Return within 5 minutes slurry (leakage 10m3), under be drilled into 1300m and recycle and return within 2 minutes slurry and (miss 6m3), static 1 hour, circulation returned slurry in 2 minutes
(leakage 2m3Slurry), lower brill 1590m, which is recycled, returns slurry for 2 minutes, leakage prompt drop to 0.Drilling fluid leakage phenomenon does not occur afterwards, and effectively protects
Oil-gas Layer is protected.Test well JH2-1 well recovers the oil 3.4 tons of initial stage daily average oil production, and reservoir protection effect is obvious.
Claims (2)
1. a kind of plugging material for protecting low pressure fracture-type reservoir, it is characterised in that: the component including following parts by weight: walnut
5~6 parts of shell, 2~3 parts of compound leakage stop agent, 1.5~2 parts of drill-feeding plugging agent, molten 4~5 parts of the sealing agent of acid, high dehydration sealing agent 4~
5 parts, 0.2~0.3 part of calcium oxide, the walnut shell are that weight ratio is 1:1 or the core of the walnut shell of the 5-7 mesh of 3:2 and 7-20 mesh
The mixture of peach shell, the compound leakage stop agent are FD-2 type drilling fluid compound leakage stop agent, and the drill-feeding plugging agent is that GXD type is rigid
Property drill-feeding plugging agent, the molten sealing agent of acid is that weight ratio is 1:1 or the molten sealing agent of the RFD-1 type fine grained of 3:2 acid and RFD-2
The mixture of the molten sealing agent of partic acid in type, the high dehydration sealing agent are the high dehydration sealing agent of R-19 type.
2. a kind of leak stopping slurry of protection low pressure fracture-type reservoir as described in claim 1, it is characterised in that: by following weight
The group of number is grouped as: 5~6 parts of walnut shell, 2~3 parts of compound leakage stop agent, 1.5~2 parts of drill-feeding plugging agent, the molten sealing agent of acid 4~
5 parts, 4~5 parts of high dehydration sealing agent, 0.2~0.3 part of calcium oxide, 100 parts of water.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011875A (en) * | 2017-04-12 | 2017-08-04 | 中国石油化工股份有限公司 | A kind of drilling fluid crack sealing agent and preparation method thereof |
| CN108865088B (en) * | 2018-07-04 | 2020-08-21 | 西南石油大学 | Temporary plugging agent, preparation method thereof, drilling fluid and application of drilling fluid in plugging of fractured reservoir while drilling |
| CN111073616B (en) * | 2019-12-18 | 2022-10-14 | 中国海洋石油集团有限公司 | Temporary plugging agent and application thereof |
| CN111827926B (en) * | 2020-06-29 | 2022-12-23 | 中石化石油工程技术服务有限公司 | Plugging process for micro-fractured and induced fracture stratum |
| CN113956857B (en) * | 2020-07-21 | 2023-07-25 | 中国石油天然气股份有限公司 | Plugging agent, plugging material and method for plugging lost circulation of well drilling and completion |
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