CN102434125A - Two-fluid-process based plugging construction method for well drilling - Google Patents
Two-fluid-process based plugging construction method for well drilling Download PDFInfo
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- CN102434125A CN102434125A CN2010105026989A CN201010502698A CN102434125A CN 102434125 A CN102434125 A CN 102434125A CN 2010105026989 A CN2010105026989 A CN 2010105026989A CN 201010502698 A CN201010502698 A CN 201010502698A CN 102434125 A CN102434125 A CN 102434125A
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Abstract
The invention discloses a two-fluid-process based plugging construction method for well drilling. The plugging construction method sequentially comprises the following steps of: (1) preparing two or more than two kinds of plugging fluids with different properties respectively in different containers; (2) injecting the two or more than two kinds of plugging fluids with different properties into a well-drilling high-pressure pipeline at the same time by a mud pump or a well-cementing cement pump so as to naturally mix the fluids in the well-drilling high-pressure pipeline; and (3) pumping the mixed plugging fluid to porous media, wherein the mixed plugging fluid is extruded and injected after well shut-in according to a loss condition, and 10-80% of the plugging fluid is ensured to be pumped into the porous media so as to achieve the purpose of plugging.
Description
The method field
The invention belongs to the oil drilling method of oil exploration and development fields, particularly relate to a kind of drilling well and use the two-fluid process leak-blocking construction method.
Background method
Leakage is generally at, the challenge that often runs in the oil-gas drilling process.Because the down-hole complex accident that leakage causes, it is very harmful that drilling well, completion are constructed, and is the outstanding difficult problem of domestic and international petroleum works circle of puzzlement always.In the drillng operation; In case miss; Not only incur loss through delay drilling time, loss drilling fluid, injury oil-gas Layer, disturb geological logging work, and can also cause borehole well instability, cause a series of down hole problems and accidents such as well slough, blowout, bit freezing; Serious leakage or when dealing with improperly even can cause well to be scrapped causes heavy economic losses.
(20m3/h＜leakage speed＜50m3/h) and severe leakage (are leaked in the blocking construction of speed＞50m3/h) in medium leakage; Should guarantee that the leakage stop cording has good retentivity to guarantee delay in leakage channel, to fill; Also require leakage-stop liquid must have consolidation strength preferably simultaneously, can play the effect of leakage channels such as filling crack, space; That is to say that spudder author expects to fill rapidly after the leak stopping system gets into leak position, plugging action.Therefore in actual field drilling leakage blockage work progress, often use the sealing agent or the leakage-stop liquid of multiple different performance, to utilize physics and the chemical action between the different loss circulation materials, delay in leakage channel, rapid accumulation, fixed, the realization shutoff of reaction.But in the actual disposition process,, therefore can not in same container, prepare because different sealing agent character exist very big difference even can directly react (like calcium chloride, silicate of soda etc.); Otherwise the flowability of leakage-stop liquid can take place rapidly to become significantly, even loses fluid ability, can cause like this and can't the leakage-stop liquid of ground configuration be sent into the down-hole leak position, has also seriously limited the simultaneously applied possibility of many heterogeneity loss circulation materials simultaneously.
Therefore if can develop the be mixed new method of the smooth entering in back drop ply of two or more totally different leakage-stop liquids of a kind of effective solution character; Not only can increase means and the measure of handling leakage more broadly; And can improve leak stopping success rate, shortening Slot Handling time significantly, this all has extremely important economic implications for raising drilling well timeliness, reduction drilling well integrated cost, quickening exploration and development speed.
In sum, conventional leak-blocking construction method is that a kind of leakage-stop liquid is injected drop ply, in order to satisfy the construction of slush pump or cementing concrete pump pumping leakage-stop liquid, requires leakage-stop liquid to have good mobility, is convenient to pumping.But leakage-stop liquid viscosity is low, and flow resistance is just little, is difficult in the leakage stratum and remains in a standstill, piles up, fills, and does not have the purpose of leak stopping.Therefore in the blocking construction process, often two or more leakage-stop liquid of different nature is injected drop ply respectively, hope that above-mentioned leakage-stop liquid of different nature mixes the purpose that back viscosity increased sharply, is detained, realized the shutoff drop ply in leakage channel.But take above-mentioned technological measure heterogeneity leakage-stop liquid in pit shaft or in the drop ply space mixed effect relatively poor, be difficult to realize increasing substantially the purpose of leakage-stop liquid viscosity, cause the very poor or leak stopping failure of plugging effect.In the ground surface vessel, two or more leakage-stop liquid of different nature is mixed then, its viscosity can sharply raise, and loses flowability, can't pumping, can't satisfy the blocking construction requirement equally.
Summary of the invention
The present invention is a kind of novel drilling leakage blockage job practices; It is double pump two-fluid process blocking method; Existing mixing leakage-stop liquid viscosity is too high can't pumping to get into drop ply to its purpose in order to solve exactly, is difficult in leakage channel, remain in a standstill and cause the low problem of leak stopping success rate though perhaps single kind leakage-stop liquid has good mobility.
The biliquid blocking method that the present invention relates to is characterised in that the preparation respectively in different vessels of two or more leakage-stop liquid of different nature; And then inject the drilling well high pressure line simultaneously through slush pump (or cementing concrete pump); Its multiple leakage-stop liquid of different nature is mixed in the drilling well high pressure line naturally, be pumped to leakage channel then, according to the mixed leakage-stop liquid of leakage situation closing well squeeze note; Guarantee that 10～80% leakage-stop liquid gets into lost-circulation zone, realizes the purpose of shutoff.
The leakage-stop liquid that the present invention relates to comprises cement paste, drilling mud, bridge blinding slurry, chemical plugging liquid, diesel oil slope soil paste, inorganic gel leakage-stop liquid, organogel leakage-stop liquid etc.
The two-fluid process blocking method that the present invention relates to has not only avoided leakage-stop liquid of different nature in the ground surface vessel, to mix the back viscosity too high method difficult problem that can't pump into, and solved leakage-stop liquid of different nature can not a well-mixed method difficult problem at drop ply.This method can satisfy on-the-spot blocking construction requirement, can satisfy the high-intensity requirement of leakage-stop liquid high viscosity again.
The stifled method of the biliquid that the present invention relates to is leaked construction technology and is suitable for the pernicious leakage stratum that shutoff crack, hole, solution cavity etc. cause; And leakage or same barefoot interval that stratum crushing, weak gluing cause overlap the leakage that the drop ply coexistence causes more; This method technology can satisfy the requirement of situ of drilling well blocking construction simply, fully; Can increase substantially the leak stopping success rate, reduce the leak stopping cost, improve stratum compressive strength and bearing capacity.
Double pump two-fluid process leak-blocking construction method according to the invention, step is following:
(1) a kind of leakage-stop liquid of preparation in container is connected the water outlet of container pipeline with slush pump or cementing concrete pump;
(2) the other a kind of leakage-stop liquid of preparation in No. two containers is connected the water outlet of container pipeline with No. two slush pumps or cementing concrete pump;
(3) slush pump or cementing concrete pump, No. two slush pumps or cementing concrete pump are connected with the drilling well high pressure line respectively;
(4) start two slush pumps simultaneously, the proportion requirement by design pumps into two kinds of leakage-stop liquids simultaneously;
(5) mixed leakage-stop liquid is delivered to drop ply through the drilling tool endoporus under the driving of high pump pressure.
(6) after high viscosity is mixed leakage-stop liquid and is pumped out drilling rod, lose the promotion of external force, remain in a standstill at leakage channel rapidly, form sealing layer, prolongation in time, leakage-stop liquid generation curing reaction reaches the purpose of pressure-bearing leak stopping.
The effect of invention
Compare with traditional blocking method; Biliquid leak stopping method is because two kinds of heterogeneity leakage-stop liquids mixing ratio in the simulation drilling tool is more even; Therefore the viscosity of leakage-stop liquid can increase considerably; Can know that by table 1 plastic viscosity of biliquid leakage-stop liquid is more than 7 times of single liquid leakage-stop liquid, and the intensity of its fixed thing increases substantially, help the thorough shutoff of drop ply; Two outer biliquid leakage-stop liquids are shorter than the hardening time of single liquid leakage-stop liquid, therefore can shorten the Slot Handling time.In a word, the present invention has successfully solved leakage-stop liquid of different nature and in the ground surface vessel, has mixed the too high method difficult problem that can't pump into of back viscosity, and this method can satisfy on-the-spot blocking construction requirement, can satisfy the high-intensity requirement of leakage-stop liquid high viscosity again.
The specific embodiment
Below in conjunction with specific embodiment the present invention is further specified.
Embodiment 1: (leakage-stop liquid that cement paste and drilling mud are formed)
(1) in a container, prepares the cement paste leakage-stop liquid, in 1m3 water, add 2500kg cement, performance parameter: density: 1.90g/cm3; Viscosity 120mpa.s;
(2) in No. two containers, prepare drilling leakage blockage liquid, in 1m3 water, add 50kg sodium soil.Performance parameter: density: 1.05g/cm3; Viscosity 20mpa.s;
(3) with cement paste leakage-stop liquid and the drilling leakage blockage liquid ratio in 1: 1, pump into the drilling well high pressure line simultaneously through two slush pumps respectively, after cement paste and the drilling fluid mixed, form the semi-solid states of matter rapidly, viscosity can't be measured;
(4) mixed leakage-stop liquid is delivered to drop ply through the drilling tool endoporus under the driving of high pump pressure, after the semi-solid states of matter goes out drill pipe bore, loses motive force, rapidly in the fluid stopping of drop ply place, thereby reaches the purpose of leak stopping.
Embodiment 2: (the gel leakage-stop liquid that different inorganic salts are formed)
Method such as embodiment 1 are said, and different is:
(1) in a container, prepares the calcium chloride leakage-stop liquid, in 1m3 water, add 200kg calcium chloride, performance parameter: density: 1.15g/cm3; Viscosity 1mpa.s;
(2) in No. two containers, prepare the silicate of soda leakage-stop liquid, in 1m3 water, add the 200kg silicate of soda.Performance parameter: density: 1.13g/cm3; Viscosity 1mpa.s;
(3) with calcium chloride leakage-stop liquid and the silicate of soda leakage-stop liquid ratio in 1: 1, pump into the drilling well high pressure line simultaneously through two slush pumps respectively, the calcium chloride leakage-stop liquid forms frozen glue rapidly with after the silicate of soda leakage-stop liquid mixes, and viscosity can't be measured.
Embodiment 3: (leakage-stop liquid that chemical leak-stopping agent and cement paste are formed)
Method such as embodiment 1 or 2 are said, and different is:
(1) in a container, prepares the cement paste leakage-stop liquid, in 1m3 water, add 2500kg cement, performance parameter: density: 1.90g/cm3; Viscosity 120mpa.s;
(2) in No. two containers, prepare chemical plugging liquid, in 1m3 water, add the 1000kg chemical leak-stopping agent.Performance parameter: density: 1.25g/cm3; Viscosity 40mpa.s;
(3) with cement paste leakage-stop liquid and chemical plugging liquid ratio in 1: 1; Pump into the drilling well high pressure line simultaneously through two slush pumps respectively; The cement paste leakage-stop liquid is with after chemical plugging liquid mixes; Form flowable plastic fluid, curing reaction took place later in this fluid at two hours, and solidfied material compressive strength reaches more than the 15Mpa.
Embodiment 4: (leakage-stop liquid that chemical leak-stopping agent and drilling mud are formed)
Method such as embodiment 1 or 3 are said, and different is:
(1) in a container, prepares the drilling mud leakage-stop liquid
In 1m3 water, add 200kg calcium slope soil, add 5kg thinner (xy-1 series products), increase the weight of to 1.20g/cm3 with Paris white (or ketone product);
(2) in No. two containers, prepare chemical plugging liquid
In 1m3 water, add 1000kg chemical leak-stopping agent (HDL-3 or like product).Performance parameter: density: 1.25g/cm3; Viscosity 40mpa.s;
(3) with drilling mud and chemical plugging liquid ratio in 1: 1; Pump into the drilling well high pressure line simultaneously through two slush pumps respectively; Drilling mud is with after chemical plugging liquid mixes; Formation can not free-pouring plastic body, and curing reaction took place later at 8 hours this plastic body, and solidfied material compressive strength reaches more than the 5Mpa.
Embodiment 5: (leakage-stop liquid that diesel oil slope soil paste and drilling mud are formed)
Method such as embodiment 1 or 4 are said, and different is:
(1) in a container, prepares the drilling mud leakage-stop liquid
In 1m3 water, add 200kg slope soil, add 5kg thinner (xy-1 series products), increase the weight of to 1.20g/cm3 with Paris white (or ketone product);
(2) in No. two containers, prepare diesel oil slope soil leakage-stop liquid
In 1m3 diesel oil, add 500kg slope soil (or like product) and 1000kg cement;
(3) with diesel oil slope soil paste and drilling well mud leakage-stop liquid ratio in 1: 1; Pump into the drilling well high pressure line simultaneously through two slush pumps respectively, diesel oil slope soil paste is with after drilling well mud leakage-stop liquid mixes, and formation can not free-pouring multiviscosisty thing; This multiviscosisty thing generation curing reaction, compressive strength is higher.
Claims (8)
1. the two-fluid process leak-blocking construction method is used in a drilling well, it is characterized in that described method in turn includes the following steps:
(1) with the preparation respectively in different vessels of two or more leakage-stop liquid of different nature;
(2) through slush pump or cementing concrete pump two or more leakage-stop liquid of different nature is injected the drilling well high pressure line simultaneously, it is mixed in the drilling well high pressure line naturally;
(3) then mixed leakage-stop liquid is pumped to leakage channel,, makes 10～80% leakage-stop liquid entering lost-circulation zone, realize the purpose of shutoff according to the mixed leakage-stop liquid of leakage situation closing well squeeze note.
2. the two-fluid process leak-blocking construction method is used in drilling well as claimed in claim 1, it is characterized in that
Described leakage-stop liquid comprises cement paste, drilling mud, bridge blinding slurry, chemical plugging liquid, diesel oil slope soil paste, inorganic gel leakage-stop liquid, organogel leakage-stop liquid.
3. the two-fluid process leak-blocking construction method is used in drilling well as claimed in claim 1, it is characterized in that
In the described step (1)
A kind of leakage-stop liquid of preparation in container is connected the water outlet of container pipeline with slush pump or cementing concrete pump; The other a kind of leakage-stop liquid of preparation in No. two containers is connected the water outlet of container pipeline with No. two slush pumps or cementing concrete pump;
In the described step (2)
Slush pump or cementing concrete pump, No. two slush pumps or cementing concrete pump are connected with the drilling well high pressure line respectively; Start two slush pumps simultaneously, the proportion requirement by design pumps into two kinds of leakage-stop liquids simultaneously;
In the described step (3)
Mixed leakage-stop liquid under the driving of high pump pressure, is delivered to drop ply through the drilling tool endoporus; After high viscosity mixing leakage-stop liquid is pumped out drilling rod, lose the promotion of external force, remain in a standstill at leakage channel rapidly, form sealing layer, prolongation in time, leakage-stop liquid generation curing reaction is accomplished the pressure-bearing leak stopping.
4. the two-fluid process leak-blocking construction method is used in drilling well as claimed in claim 3, it is characterized in that described method in turn includes the following steps:
(1) in a container, prepares the cement paste leakage-stop liquid, in 1m3 water, add 2500kg cement, performance parameter: density: 1.90g/cm3; Viscosity 120mpa.s;
(2) in No. two containers, prepare drilling leakage blockage liquid, in 1m3 water, add 50kg sodium soil, performance parameter: density: 1.05g/cm3; Viscosity 20mpa.s;
(3) with cement paste leakage-stop liquid and drilling leakage blockage liquid ratio, pump into the drilling well high pressure line simultaneously through two slush pumps respectively, after cement paste and the drilling fluid mixed, form the semi-solid states of matter rapidly in 1: 1;
(4) mixed leakage-stop liquid is delivered to drop ply through the drilling tool endoporus under the driving of high pump pressure, after the semi-solid states of matter goes out drill pipe bore, loses motive force, rapidly in the fluid stopping of drop ply place, thereby reaches the purpose of leak stopping.
5. the two-fluid process leak-blocking construction method is used in drilling well as claimed in claim 3, it is characterized in that described method in turn includes the following steps:
(1) in a container, prepares the calcium chloride leakage-stop liquid, in 1m3 water, add 200kg calcium chloride, performance parameter: density: 1.15g/cm3; Viscosity 1mpa.s;
(2) in No. two containers, prepare the silicate of soda leakage-stop liquid, in 1m3 water, add 200kg silicate of soda, performance parameter: density: 1.13g/cm3; Viscosity 1mpa.s;
(3) with calcium chloride leakage-stop liquid and the silicate of soda leakage-stop liquid ratio in 1: 1, pump into the drilling well high pressure line simultaneously through two slush pumps respectively, the calcium chloride leakage-stop liquid forms frozen glue rapidly with after the silicate of soda leakage-stop liquid mixes;
(4) mixed leakage-stop liquid is delivered to drop ply through the drilling tool endoporus under the driving of high pump pressure, after the semi-solid states of matter goes out drill pipe bore, loses motive force, rapidly in the fluid stopping of drop ply place, thereby reaches the purpose of leak stopping.
6. use the two-fluid process leak-blocking construction method like the drilling well of claim 1～3, it is characterized in that described method in turn includes the following steps:
(1) in a container, prepares the cement paste leakage-stop liquid, in 1m3 water, add 2500kg cement, performance parameter: density: 1.90g/cm3; Viscosity 120mpa.s;
(2) in No. two containers, prepare chemical plugging liquid, in 1m3 water, add the chemical leak-stopping agent of 1000kg density 1.25g/cm3, viscosity 40mpa.s;
(3) with cement paste leakage-stop liquid and chemical plugging liquid ratio in 1: 1; Pump into the drilling well high pressure line simultaneously through two slush pumps respectively; The cement paste leakage-stop liquid forms flowable plastic fluid with after chemical plugging liquid mixes, and curing reaction took place later at two hours this fluid.
7. use the two-fluid process leak-blocking construction method like the drilling well of claim 1～3, it is characterized in that described method in turn includes the following steps:
(1) in a container, prepares the drilling mud leakage-stop liquid
In 1m3 water, add 200kg calcium slope soil, add 5kg thinner xy-1 class, increase the weight of to 1.20g/cm3 with Paris white;
(2) in No. two containers, prepare chemical plugging liquid
The chemical leak-stopping agent HDL-3 that in 1m3 water, adds 1000kg density 1.25g/cm3, viscosity 40mpa.s;
(3) with drilling mud and chemical plugging liquid ratio in 1: 1; Pump into the drilling well high pressure line simultaneously through two slush pumps respectively; Drilling mud is with after chemical plugging liquid mixes, and formation can not free-pouring plastic body, and curing reaction took place later at 8 hours this plastic body.
8. the two-fluid process leak-blocking construction method is used in drilling well as claimed in claim 3, it is characterized in that described method in turn includes the following steps:
(1) in a container, prepares the drilling mud leakage-stop liquid
In 1m3 water, add 200kg calcium slope soil, add 5kg thinner xy-1, increase the weight of to 1.20g/cm3 with Paris white;
(2) in No. two containers, prepare diesel oil slope soil leakage-stop liquid
Calcium is native in the adding 500kg sodium local, colloquial expression in 1m3 diesel oil, slope is native and 1000kg cement;
(3) with diesel oil slope soil paste and the drilling well mud leakage-stop liquid ratio in 1: 1, pump into the drilling well high pressure line simultaneously through two slush pumps respectively, diesel oil slope soil paste is with after drilling well mud leakage-stop liquid mixes, and formation can not free-pouring multiviscosisty thing, this multiviscosisty thing generation curing reaction.
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Cited By (7)
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| CN103773335A (en) * | 2013-12-31 | 2014-05-07 | 东营泰尔石油技术有限公司 | Plugging agent capable of being solidified through acidification |
| CN105507848A (en) * | 2015-12-17 | 2016-04-20 | 成都得道实业有限公司 | Fast-dehydrating curable and organic synthetic plugging agent compound plugging construction method |
| CN106677739A (en) * | 2016-12-06 | 2017-05-17 | 长江大学 | Perforation blasthole blocking method |
| CN106703744A (en) * | 2016-12-06 | 2017-05-24 | 长江大学 | High-pressure-bearing plugging method for fracturing wellhole |
| CN110671073A (en) * | 2019-10-23 | 2020-01-10 | 南智（重庆）能源技术有限公司 | Three-dimensional leakage stoppage method for natural gas well shaft leakage and test device thereof |
| CN110819320A (en) * | 2018-08-08 | 2020-02-21 | 中国石油化工股份有限公司 | Oil well casing leakage plugging agent and plugging method |
| CN116291307A (en) * | 2023-05-12 | 2023-06-23 | 中国石油大学(华东) | Oil-gas well double-liquid method plugging method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103773335A (en) * | 2013-12-31 | 2014-05-07 | 东营泰尔石油技术有限公司 | Plugging agent capable of being solidified through acidification |
| CN103773335B (en) * | 2013-12-31 | 2016-02-24 | 东营泰尔石油技术有限公司 | Acidificable consolidation type plugging agent |
| CN105507848A (en) * | 2015-12-17 | 2016-04-20 | 成都得道实业有限公司 | Fast-dehydrating curable and organic synthetic plugging agent compound plugging construction method |
| CN105507848B (en) * | 2015-12-17 | 2018-02-06 | 成都得道实业有限公司 | The fast curable class of dehydration and organic synthesis class sealing agent compounding leak-blocking construction method |
| CN106677739A (en) * | 2016-12-06 | 2017-05-17 | 长江大学 | Perforation blasthole blocking method |
| CN106703744A (en) * | 2016-12-06 | 2017-05-24 | 长江大学 | High-pressure-bearing plugging method for fracturing wellhole |
| CN110819320A (en) * | 2018-08-08 | 2020-02-21 | 中国石油化工股份有限公司 | Oil well casing leakage plugging agent and plugging method |
| CN110671073A (en) * | 2019-10-23 | 2020-01-10 | 南智（重庆）能源技术有限公司 | Three-dimensional leakage stoppage method for natural gas well shaft leakage and test device thereof |
| CN116291307A (en) * | 2023-05-12 | 2023-06-23 | 中国石油大学(华东) | Oil-gas well double-liquid method plugging method |
| CN116291307B (en) * | 2023-05-12 | 2023-08-04 | 中国石油大学(华东) | Oil-gas well double-liquid method plugging method |
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Application publication date: 20120502 |