CN1656301A - Method of producing hydrocarbon gas - Google Patents
Method of producing hydrocarbon gas Download PDFInfo
- Publication number
- CN1656301A CN1656301A CNA038125501A CN03812550A CN1656301A CN 1656301 A CN1656301 A CN 1656301A CN A038125501 A CNA038125501 A CN A038125501A CN 03812550 A CN03812550 A CN 03812550A CN 1656301 A CN1656301 A CN 1656301A
- Authority
- CN
- China
- Prior art keywords
- liquid
- gas
- fluid
- producing well
- interval
- 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
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000004215 Carbon black (E152) Substances 0.000 title claims description 6
- 229930195733 hydrocarbon Natural products 0.000 title claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 title claims description 6
- 239000012530 fluid Substances 0.000 claims abstract description 99
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims description 54
- 238000007599 discharging Methods 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000000926 separation method Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000013543 active substance Substances 0.000 claims 2
- 238000005336 cracking Methods 0.000 claims 1
- 230000002706 hydrostatic effect Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 244000287680 Garcinia dulcis Species 0.000 description 1
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
- E21B43/385—Arrangements for separating materials produced by the well in the well by reinjecting the separated materials into an earth formation in the same well
Abstract
A method of producing gas from an underground formation, which is penetrated by a production well to surface, the method comprising allowing formation fluid comprising gas and liquid to flow into the production well at a production interval; allowing the formation fluid to separate into a gaseous component and a liquid component; producing the gaseous component through the production well to the surface; accumulating the liquid component in the production well so as to form a liquid column having, at a drainage interval of the production well, a pressure exceeding the pressure in the surrounding formation; and allowing liquid from the liquid column at the drainage interval to drain away into the surrounding formation, comprising treating the wall of the production well at the drainage interval and/or treating the formation surrounding the drainage interval so as to increase the flow rate of liquid into the surrounding formation.
Description
Technical field
The present invention relates to a kind of from subterranean strata the method and system of gas extraction, the especially hydrocarbon gas.
Background technology
In the system that the hydrocarbon gas is exploited in known being used for, a producing well is used for the injection gas zone.Reservoir fluid can for example be contained in the producing zone section by the perforation in certain depth place oil well casing.Reservoir fluid also comprises liquid, especially water usually except gas.
For example when a so-called high osmosis vein enters producing well, liquid is present in the formation fluid usually.When the reservoir conditions (pressure, temperature) of the pay interval degree of depth is so so that formation fluid when including the steam that is dissolved in the gas or liquid, liquid also can form by solidifying in leading to the process on the face of land.
When leading to aboveground flow velocity when enough low, the shaft bottom will be separated, sink down into to liquid from formation fluid under the effect of gravity, thereby form a fluid column in this place liquid gathering, be generally a water column.
In general do not wish to form water column, because when water column covers pay interval wholly or in part, the inflow of reservoir fluid can be hindered or even can be stopped.Used the method for a lot of routines to solve the formation of water column in the gas well in the prior art.
A kind of method is to install to produce pipeline in well, so-called speed sleeve pipe (velocitystring), and it is used to limit the effective cross section area of exploitation to the fluid on the face of land, thereby sufficiently improves flow velocity to prevent gas/liquid separation.Another kind method is to use the foaming chemicals, thereby its surface tension that reduces the water that separates makes water more easily to be delivered to the face of land by gas.Another known method is that water is pumped to the face of land from water column, and this is also referred to as plunger and promotes.In another method, used a compressor to reduce well head pressure.
US Patent specification No.5 913 363 discloses a kind of method that is used for carrying out at the gas that gas well is held a producing zone section down-hole separation water outlet, it has used a mine gas/separator that is arranged on the pay interval, and wherein isolated water is directed to one by embolism and a pressure sensitive valve and disposes the rock stratum.
US Patent specification No.5 443 120 discloses a kind of gravity that utilizes and carry out the method that water outlet is separated in the down-hole in the part of an inclination well bore of being isolated by packer from the hydrocarbon gas, and wherein isolated water injection is gone in the lower disposal rock stratum, a pressure ratio production rock stratum.
US Patent specification No.5 366 011 discloses a kind of gas well that special sleeve pipe/conduit is arranged that has.This layout has formed an annular space that communicates with the production rock stratum and has had a slide cartridge that liquid communicates between annular space and the conduit to allow selectively.Water can be separated from gas in annular space and can inflow catheter and flow into a unproductive interval therefrom.
US Patent specification No.6 336 504 discloses the method that a kind of down-hole that is used for water is separated and injected, wherein reservoir fluid comprises some oil, water and optional gas at least, and wherein dispose in the rock stratum to be injected into one to exploit water outlet at enough pressure places a separator arrangement variable position in well.
Known method can only be applied under the special situation and shortcoming is all arranged, especially since with the relation of the influencing each other of gas-field exploitation, complexity and cost.
Summary of the invention
An object of the present invention is to provide a kind of new method from the subterranean strata gas extraction, wherein liquid is separated from the formation fluid that is contained in payzone section in all one's life, and forms a fluid column in producing well.
Another purpose provides a producing well that is used to implement the inventive method.
For this reason, according to the present invention, provide a kind of method from the subterranean strata gas extraction, this subterranean strata is by a producing well institute injection that extends to the face of land, and the method comprising the steps of:
-make the formation fluid that includes gas and liquid flow into producing well from subterranean strata at a producing zone section place;
-make formation fluid be separated into a gas component and a liquid component;
-by producing well gas component is exploited to the face of land;
-thereby the collected liquid component forms a fluid column in producing well, the pressure of this fluid column rock stratum around the pressure at a discharging interval place of producing well surpasses; And
-make liquid drain into rock stratum on every side from fluid column at discharging interval place,
The step that liquid is emitted from fluid column is included in the discharging interval, and the processing of rock stratum on every side enters the flow velocity of rock stratum on every side to improve liquid to the processing of the wall of producing well and/or to the discharging interval.
The present invention also provides a producing well from the subterranean strata gas extraction, and this well extends downwards from the face of land and arranges to be used for the injection subterranean strata, and this producing well comprises:
-make the formation fluid that includes gas and liquid flow into a producing zone section of producing well from subterranean strata; With
-one discharging interval,
Wherein thereby producing well is so to arrange to make the liquid that separates from formation fluid at normal operation period gather together to form one to cover the fluid column of discharging interval at least in part, and wherein discharge interval and be arranged as and make liquid drain into rock stratum on every side, handle and/or the rock stratum around the discharging interval is handled by wall to the producing well of discharging interval from fluid column.
The present invention is based on the understanding that the applicant obtains, can utilize the deadweight of liquid to be discharged in the rock stratum, promptly owing to the hydrostatic pressure that is formed in the fluid column, if discharging interval and existing enough fluids to be communicated with on every side between the rock stratum.Because this is very favourable for an a lot of reasons.First advantage is by using this method, can the height that fluid column reaches to be limited at normal operation period.Therefore, also just limited by the formed obstruction of fluid column the fluid that flows into the rock stratum.Another advantage is that the water that is included in the reservoir fluid need not exploitation to the face of land, and can emit simply underground in various actual conditions, and need not to use special injection device, for example a separation injector well and a pump.
Should be noted that the discharging interval can be arranged under the pay interval dividually.When well comprises a long section and the interval of the direct fluid communication of gas zone on every side, and when in normal operation period is being overlapped the well of this interval, being formed with a fluid column, a producing zone section is represented on the top of this interval and the bottom is a discharging interval, and its boundary line is determined by lap.
The step that allows liquid emit from fluid column suitably comprise to the processing of the borehole wall and/or to the processing of rock stratum around the discharging rock stratum so that liquid be easier to flow into around the rock stratum.When well bore does not add when cover, be particularly advantageous to the processing of wellbore wall.
Suitably, on the wall of discharging interval place producing well, be furnished with perforation, especially when well has cover.
Description of drawings
Pass through embodiment now, and with reference to the accompanying drawings, the present invention will be described in more detail.In the accompanying drawings:
Fig. 1 schematically shows the pressure distribution in the oil well, and it has the gas column on a fluid column and the top;
Fig. 2 shows as permeability-thickness product (kh)
InjThe fluid discharge speed Q of function
L, dCalculating embodiment curve map for three liquid-column heights;
Fig. 3 shows as permeability-thickness product (kh)
InjThe calculating embodiment curve map of fluid discharge timeconstant of function;
Fig. 4 shows as permeability-thickness product (kh)
InjThe height H of function for the calculating embodiment curve map of three liquid-column heights;
Fig. 5 schematically shows first specific embodiment of the present invention;
Fig. 6 schematically shows second specific embodiment of the present invention.
The specific embodiment
With reference to figure 1.Schematically show among the figure that (unit: (unit: Pa) distribute, this peupendicular hole has a fluid column in its bottom to pressure p m), at its top one gas column is arranged along a depth d that is in the peupendicular hole of resting position (for example in the gas well down periods).The pressure representative that the face of land (d=0) is located is P
0Well is at the face of land and fluid column top depth d
lBetween gassy.Gas is full of pressure p among the part l along with depth d increases linearly, p (d)=p
0+ ρ
gGd, wherein ρ
gBe the density (kg/m of gas
3), g is the earth's core gravity of standard.
In fluid column (being Reference numeral 3 among the figure), hydrostatic pressure p is along with density of liquid ρ
lIncrease p (d)=p pro rata
0+ ρ
gGd
t+ ρ
lG (d-d
l).When communicating with formation fluid on every side at certain depth place well, and pressure that should the rock stratum, place is when very low, and liquid will drain into the rock stratum.
Be used for the naive model that gas well cuts out at one, when well identical with pressure distribution in the well that is full of gas fully in the gas zone during at top seal as the pressure distribution of the function of the degree of depth, promptly corresponding to 1 section and the 5 sections pressure distribution that constituted of pressure curve among Fig. 1.In this case, when well at dp＞d
lDegree of depth place be provided with discharging perforation, the driving force that fluid column emits is pressure differential Δ p=(ρ
l-ρ
g) g (dp-d
l).
In this case, the rate of discharge Q of fluid column discharge
L, d(m
3/ s) can be estimated as
Wherein
(kh)
InjBe illustrated in the permeability-thickness product (m of discharging rock stratum, interval place
3);
μ
lViscosity (PaS) for liquid;
r
eDrainage radius (m) for well;
r
wBe well bore radius (m);
S is wall drag coefficient (numeral);
And Δ p defines in front.
The expression formula of the characteristic time of fluid column discharging can obtain on the following hypothesis: the liquid volume dV that supposition emitted in the unit dt a derivative time is proportional with the height H of discharging fluid column on the interval, H=(d
p-d
l).Proportionality constant can obtain from formula (1).The integration of a differential equation that obtains has like this obtained the decay of exponential form simply in time of a liquid-column height, and wherein timeconstant (s) is provided by following formula:
Δ ρ=(ρ wherein
l-ρ
g), and wherein all other symbols and front are defined has an identical meaning.
With reference now to Fig. 2,, wherein shows as permeability-thickness product (kh)
InjThe fluid discharge speed Q of the function of (cubic meter)
L, d(m
3/ day).Curve when also showing three kinds of differing heights H at fluid column top on discharging perforation top, a) H=5m; B) H=25m; C) H=100m.Curve utilizes in the table 1 and calculates based on formula (1) for the selected following parameter of a common gas well.
Table 1
| Amount | Numerical value |
| ????r e | ????850m |
| ????r w | ????0.1m |
| (machinery) wall drag S | ????+5 |
| Liquid (water) viscosity, mu l | ????0.4mPa·S |
| Liquid (water) density p l | ????1000kg/m 3 |
| Gas density ρ g | ????75kg/m 3 |
During gas-field exploitation, liquid (water) enters the speed Q of well
L, dBe generally 1...4m
3The order of magnitude in/sky, and in Fig. 2, represent.Expressed among the figure when well shutting in, the speed that water emits is identical or bigger on the order of magnitude with the speed that water enters.
Fig. 3 show utilize that parameter value calculation goes out in the table 1 as permeability-thickness product (kh)
InjTimeconstant in the formula (2) of (millidarcy rice) function (my god).
And when well was not closed, when being contained in the well in the pay interval of reservoir fluid on the discharging interval, water can emit.When a plateau, the speed Q that liquid enters
L, eEqual the speed Q of fluid discharge
L, dThe estimated value of liquid-column height H (m) can be by rewriting formula (1) and using Q during plateau
L, eReplace Q
L, dAnd obtain, as follows
Wherein all symbols have and former defined same meaning.
Fig. 4 shows the height H for three kinds of liquid ingress rates that the parameter utilized in the table 1 calculates by formula (3), a) Q
L, e=1m
3/ day; B) Q
L, e=2m
3/ day; C) Q
L, e=4m
3/ day.
Obviously, if liquid ingress rate Q
L, eGreater than critical Q
L, e; Crit, the height that well can bear when the height of fluid column will be greater than normal operation.Under such situation, can interrupt the exploitation of gas component on the face of land every now and then, its time interval long enough (for example 5 times timeconstant) is to allow enough fluid discharge go into the rock stratum.In these down periods, liquid-column height is reduced to and is lower than a predetermined altitude, can continue afterwards to produce.
When liquid ingress rate during less than the intermediary liquid ingress rate, gas component can be exploited to the face of land constantly, emits when can allow liquid exploit along with gas component simultaneously.
Intermediary liquid ingress rate Q
L, e; CritNumerical value depend on several factors, for example flow into the liquid/gas ratio of the fluid of reservoir, the shape of gas well, the distribution of perforation, emission performance and reservoir pressure and temperature.In fact it can utilize simulation tool to determine.
According to actual conditions, there is several different methods can allow liquid emit at the discharging interval.
When well bore becomes during interval when not being with sleeve pipe in discharging, in case form the fluid column of enough height, discharging will take place naturally.
Another kind of suitable mode is that the perforation of producing on the borehole wall is arranged, especially when well has sleeve pipe.
If the liquid ingress rate is greater than the intermediary liquid ingress rate under a kind of given situation, liquid enter the rock stratum rate of discharge can by the discharging interval to produce the borehole wall and handle and/or to the discharging interval around the rock stratum handle and increase.This processing makes liquid be easier to flow into rock stratum on every side.Is particularly advantageous to the processing of wellbore wall when not having quilt cover to get up when well bore.Such processing generally can only reach limited distance in the rock stratum.
A kind of suitable processing method of well bore is to utilize the processing method of chemicals.For example, for example can use acid such as hydrochloric acid to remove mud and the fines that is deposited on the wellbore wall, thereby reduce the barrier layer (" top layer stops ") that liquid flows into the rock stratum.Acid pumping downwards also mixes mutually with water column.Acid can't be permanent and keeps active, generally is less than 24 hours.
In suitable processing, fluid column is exerted pressure pulse so that the rock stratum around the discharging rock stratum more produces micro-crack in the depths to the rock stratum around the discharging rock stratum.Can utilize known systems to provide pressure pulse, be also referred to as sound wave pulse by hydraulic impulse.
Also can mix applied chemistry and pressure treatment, thereby quicken chemical reaction, and also be in order to make the micro-crack that is formed in the rock stratum more sharp-pointed.
The flow velocity Q of gas on producing well
g(m
3Therefore/s) enough low, and when the flow velocity in the well is also enough low, will sinks to the shaft bottom, assemble formation one fluid column at this place thereby liquid will separate liquid.
Fluid separation applications can not take place naturally when higher gas flow rate.Divide the abiogenous critical gas flow velocity of defection Qg under action of gravity, the estimated value of crit can be obtained by following formula
This formula is called Tener (Turner) criterion in the prior art.Used symbol has following meaning in this formula:
The diameter of D=well (m);
C=one numeric constant, its value suitably are 2;
ρ
l=fluid density (kg/m
3);
ρ
g=gas density (kg/m
3);
σ=surface tension (kg/s
2);
C
D=resistance coefficient (numerical value).
A typical critical gas flow velocity equals the air velocity of about 5-6m/s.
When gas flow rate during greater than the critical gas flow velocity, the gas flow energy is very high, is enough to liquid to be transported to the face of land, and this is also referred to as the mist of oil flow regime.In this case, method of the present invention can be advantageously by arranging that in the down-hole or on the well face gas/liquid separation device uses.This separator arrangement is for to accept formation fluid by an import, and has the outlet of at least one air-flow and liquid stream.Liquid stream is used to form the fluid column of down-hole then.The eliminator that is applicable to this purpose is known in the prior art, for example a cyclone separator, a plate compression eliminator, a curved guide blade type eliminator or a moisture pad.
When formation fluid comprised the steam that is dissolved in the gas and just just can condenses or fluid when fluid is increased to certain depth in the well, eliminator preferably was arranged as and is higher than this degree of depth.
With reference now to Fig. 5,, it schematically shows first specific embodiment of the present invention.15 verticallydownwardlies extend and injection one gas zone 20 one producing well 11 from the face of land.This well has the sleeve pipe (not shown), and is furnished with a plurality of perforation in the discharging interval 28 under a producing zone section 24 and this pay interval.On the discharging interval eliminator 30 is arranged in well, this eliminator has a reservoir fluid import 32, a gas vent 34 and fluid outlet 36.Be furnished with a conduit 40 from exporting 36 positions to the pay interval, in this zone or should be formed with fluid column 44 at normal operation period on the zone.Conduit 40 is used to prevent that the liquid that separates from being entered by gas winding again.Production tube 48 provide export 34 and well head 50 between the fluid of gas be communicated with.
At normal operation period, the reservoir fluid that contains gas and water flows into well 1 at pay interval 24.Reservoir fluid raises in well and enters eliminator 30 by import 32.Eliminator is separated into a component that mainly is made of gas with reservoir fluid, and a liquid component.Gas component guides to the surface by production tube 48.Liquid is directed to a position under the pay interval, forms a fluid column 44 at this place.
The height of fluid column has applied a hydrostatic pressure that is higher than pressure in the discharging rock stratum 20, interval place on discharging interval perforation 28.Therefore the liquid of water column 44 can drain in the rock stratum by the perforation of discharging interval.When liquid enters flow velocity Q
L, eEnter flow velocity Q than intermediary liquid
L, e; CritHour, gas component can be exploited to the face of land constantly, and can allow liquid emit simultaneously.If desired, can handle the rock stratum around discharging interval or the discharging interval with one of preceding method, so that can move continuously, the speed that especially makes pay interval 24 place's water flow into is substantially equal to discharge the flow velocity that interval 28 place's water drain into the rock stratum.Alternatively, too big if liquid enters flow velocity, can be by closing the exploitation that production tube 50 stops gas at well head 50, thus can there be more time to allow fluid discharge go out.
When water drained into rock stratum 20, preferably water can sink down into the water level of aqueous vapor contact surface 55 in the rock stratum, so that the water of discharging can not exploited again.The time scale of this process is determined by the vertical permeability of rock stratum.
The flow velocity subcritical gas flow rate of inflow gas should be noted that if can need not eliminator 30 so.
With reference to figure 6, it schematically shows another specific embodiment of the present invention.Be used to indicate identical object with label similar among Fig. 5.Well 60 just is added with sleeve pipe at the top, at regional 62 places and the following sleeve pipe that all do not add.
At the normal operation period of this well, the formation fluid that contains gas and water enters 60 li in well and raises not adding sleeve portion.To such an extent as to the enough low separation that can allow water droplet 63 of total gas flow rate, it sinks down into the shaft bottom, gathering together forms a fluid column 44.At normal operation period, fluid column extends to the water level of 62 lower ends, localized area.
In zone 62, reservoir fluid can have no to enter in the well with hindering.
In zone 64, because the pressure that the hydrostatic pressure of water column produces is still little than the pressure in the rock stratum, therefore formation fluid liquid can enter in the well as shown by arrows like that in zone 64 in the well, but compares some obstruction with regional 62.Zone 62 and 64 constitutes pay interval.
In zone 66, the hydrostatic pressure in the fluid column is so and makes well press to approximate greatly pressure in the rock stratum on every side therefore in fact do not have fluid communication between this place's well and rock stratum.
In zone 68, the enough big consequently water of hydrostatic pressure can drain into the rock stratum.Zone 68 constitutes the discharging interval.
In addition, can to wellbore wall and/or on every side the rock stratum handle so that can allow enough fluids emit to realize continuous operation.
Should be noted that and in method and system of the present invention, can distinguish four fundamental regions (using the defined symbol in front) that are used to move:
1.Q
g＜Q
G, critAnd Q
L, e＜Q
L, e; Crit, need not the gas/liquid separation device so, and can realize continuous operation;
2.Q
g＜Q
G, critAnd Q
L, e＞Q
L, e; Crit, need not the gas/liquid separation device so, but require operation discontinuously;
3.Q
g＞Q
G, critAnd Q
L, e＜Q
L, e; Crit, need a gas/liquid separation device so, and can realize continuous operation;
4.Q
g＞Q
G, critAnd Q
L, e＞Q
L, e; Crit, need a gas/liquid separation device and needs to move discontinuously so.
Replace operation discontinuously, can further handle so that liquid is easier to drain into the rock stratum, thereby improve Q well bore and/or rock stratum
L, e; Crit
Claims (17)
1. method from the subterranean strata gas extraction, this subterranean strata is by a producing well institute injection that extends to the face of land, and the method comprising the steps of:
-make the formation fluid that contains gas and liquid flow into producing well from subterranean strata at a producing zone section place;
-make formation fluid be separated into a gas component and a liquid component;
-by producing well gas component is exploited to the face of land;
-in producing well the collected liquid component forming a fluid column, this fluid column a discharging interval of producing well have surpass around the pressure of pressure in the rock stratum; And
-make liquid drain into rock stratum on every side from fluid column at discharging interval place,
The step that wherein allows liquid emit from fluid column is included in the discharging interval, and the processing of rock stratum on every side enters the flow velocity of rock stratum on every side so that improve liquid to the processing of the production borehole wall and/or to the discharging interval.
2. the method for claim 1 is characterized in that the step that fluid discharge is gone out also is included in layout perforation on the production borehole wall that discharges interval.
3. method as claimed in claim 1 or 2, thus it is characterized in that the wall of producing well being handled by adding chemical active agent to liquid.
4. method as claimed in claim 3 is characterized in that this chemical active agent is a kind of acid.
5. as arbitrary described method among the claim 1-4, it is characterized in that by cracking in the rock stratum around and it is handled.
6. as arbitrary described method among the claim 1-5, it is characterized in that the fluid column pulse of exerting pressure.
7. the described method of arbitrary as described above claim, it is characterized in that the flow velocity that makes the formation fluid separation steps comprise the gas component of will exploit out in the producing well is controlled to be still is lower than a critical gas flow velocity, thereby rock stratum liquid also can separate in producing well under the situation that does not have a special separator.
8. as arbitrary described method among the claim 1-6, the import that it is characterized in that the formation fluid separation steps is comprised and allow formation fluid enter the gas/liquid separation device, this eliminator has the outlet of gas component and liquid component.
9. method as claimed in claim 8 is characterized in that the liquid that receives at the liquid outlet of eliminator is directed to a position under the pay interval by a conduit.
10. method as claimed in claim 8 or 9 is characterized in that the gas/liquid separation device is arranged in the producing well.
11. method as claimed in claim 10, it is characterized in that formation fluid comprises liquid vapour or is dissolved in liquid in the gas, and wherein the gas/liquid separation device in the producing well is arranged on the degree of depth that normal operation period liquid solidifies out from formation fluid.
12. method is characterized in that separator arrangement is on the face of land as claimed in claim 8 or 9.
13. the described method of arbitrary as described above claim is characterized in that at normal operation period, gas component is exploited continuously to the face of land; And wherein the liquid of fluid column can emit in the gas extraction component.
14. as arbitrary described method among the claim 1-12, it is characterized in that at normal operation period, the exploitation of gas component is just interrupted at set intervals, be enough to its blanking time allow enough liquid drain into the rock stratum, so that liquid-column height is reduced to below the predetermined altitude from fluid column.
15. the described method of arbitrary as described above claim it is characterized in that gas component mainly is made of the hydrocarbon gas, and wherein liquid is made of water mainly.
16. the producing well from a subterranean strata gas extraction, this well extend downwards from the face of land and be arranged as the injection subterranean strata, this producing well comprises:
One makes the formation fluid that contains gas and liquid flow into the pay interval of producing well from subterranean strata; With
One discharging interval,
Wherein producing well is so to arrange to make and gather together to form a fluid column that covers the discharging interval at least in part from the isolated liquid of formation fluid at normal operation period, and wherein discharge interval and be arranged as and make liquid, by the production borehole wall of discharging interval being handled and/or the rock stratum around the discharging interval being handled from the rock stratum of fluid column around draining into.
17. producing well as claimed in claim 16 is characterized in that also comprising a gas/liquid separation device, this eliminator has the import of a formation fluid, the outlet of a gas separated component and the outlet of a liquid component that separates.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02252878.0 | 2002-04-24 | ||
| EP02252878 | 2002-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1656301A true CN1656301A (en) | 2005-08-17 |
| CN1332121C CN1332121C (en) | 2007-08-15 |
Family
ID=29266003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038125501A Expired - Fee Related CN1332121C (en) | 2002-04-24 | 2003-04-24 | Method of producing hydrocarbon gas |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20030213592A1 (en) |
| EP (1) | EP1497531A1 (en) |
| CN (1) | CN1332121C (en) |
| AU (1) | AU2003224131A1 (en) |
| CA (1) | CA2483202A1 (en) |
| NO (1) | NO20045092L (en) |
| RU (1) | RU2311527C2 (en) |
| WO (1) | WO2003091538A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847862A (en) * | 2018-08-21 | 2020-02-28 | 中国石油天然气股份有限公司 | Drainage gas production device and drainage gas production method |
Family Cites Families (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2964109A (en) * | 1958-05-01 | 1960-12-13 | Oil Recovery Corp | Method of eliminating water resistant coating from bore of injection wells |
| US3363692A (en) * | 1964-10-14 | 1968-01-16 | Phillips Petroleum Co | Method for production of fluids from a well |
| US3718187A (en) * | 1971-02-08 | 1973-02-27 | Marathon Oil Co | Method of injection well stimulation |
| US3990512A (en) * | 1975-07-10 | 1976-11-09 | Ultrasonic Energy Corporation | Method and system for ultrasonic oil recovery |
| US4131161A (en) * | 1977-08-25 | 1978-12-26 | Phillips Petroleum Company | Recovery of dry steam from geothermal brine |
| US4649994A (en) * | 1983-05-31 | 1987-03-17 | Gerard Chaudot | Installation for bringing hydrocarbon deposits into production with reinjection of effluents into the deposit or into the well or wells |
| US5251697A (en) * | 1992-03-25 | 1993-10-12 | Chevron Research And Technology Company | Method of preventing in-depth formation damage during injection of water into a formation |
| US5296153A (en) * | 1993-02-03 | 1994-03-22 | Peachey Bruce R | Method and apparatus for reducing the amount of formation water in oil recovered from an oil well |
| US5695643A (en) * | 1993-04-30 | 1997-12-09 | Aquatech Services, Inc. | Process for brine disposal |
| US5346015A (en) * | 1993-05-24 | 1994-09-13 | Halliburton Company | Method of stimulation of a subterranean formation |
| US5366011A (en) * | 1993-12-09 | 1994-11-22 | Mobil Oil Corporation | Method for producing high water-cut gas with in situ water-disposal |
| US5443120A (en) * | 1994-08-25 | 1995-08-22 | Mobil Oil Corporation | Method for improving productivity of a well |
| US6089322A (en) * | 1996-12-02 | 2000-07-18 | Kelley & Sons Group International, Inc. | Method and apparatus for increasing fluid recovery from a subterranean formation |
| CA2196959A1 (en) * | 1997-02-06 | 1998-08-06 | Walter Paplinski | Method of downhole separation of natural gas from brine with injection of spent brine into a disposal formation |
| CA2197377C (en) * | 1997-02-12 | 2006-01-31 | Horst Simons | Method and apparatus for hydrocarbon production and water disposal |
| US5836393A (en) * | 1997-03-19 | 1998-11-17 | Johnson; Howard E. | Pulse generator for oil well and method of stimulating the flow of liquid |
| GB2326895B (en) * | 1997-07-03 | 1999-08-18 | Schlumberger Ltd | Seperation of oil-well fluid mixtures |
| US6131660A (en) * | 1997-09-23 | 2000-10-17 | Texaco Inc. | Dual injection and lifting system using rod pump and an electric submersible pump (ESP) |
| US6116341A (en) * | 1998-05-29 | 2000-09-12 | Texaco Inc. | Water injection pressurizer |
| US5988275A (en) * | 1998-09-22 | 1999-11-23 | Atlantic Richfield Company | Method and system for separating and injecting gas and water in a wellbore |
| US6367547B1 (en) * | 1999-04-16 | 2002-04-09 | Halliburton Energy Services, Inc. | Downhole separator for use in a subterranean well and method |
| US6336505B1 (en) * | 1999-07-15 | 2002-01-08 | Halliburton Energy Services, Inc. | Cementing casing strings in deep water offshore wells |
| NO311814B1 (en) * | 2000-02-23 | 2002-01-28 | Abb Research Ltd | Device and method for oil recovery |
| US6336504B1 (en) * | 2000-03-03 | 2002-01-08 | Pancanadian Petroleum Limited | Downhole separation and injection of produced water in naturally flowing or gas-lifted hydrocarbon wells |
| US6382316B1 (en) * | 2000-05-03 | 2002-05-07 | Marathon Oil Company | Method and system for producing fluids in wells using simultaneous downhole separation and chemical injection |
| US6547003B1 (en) * | 2000-06-14 | 2003-04-15 | Wood Group Esp, Inc. | Downhole rotary water separation system |
| US6755251B2 (en) * | 2001-09-07 | 2004-06-29 | Exxonmobil Upstream Research Company | Downhole gas separation method and system |
| MY129091A (en) * | 2001-09-07 | 2007-03-30 | Exxonmobil Upstream Res Co | Acid gas disposal method |
| US6755250B2 (en) * | 2002-08-16 | 2004-06-29 | Marathon Oil Company | Gas-liquid separator positionable down hole in a well bore |
-
2003
- 2003-04-24 CN CNB038125501A patent/CN1332121C/en not_active Expired - Fee Related
- 2003-04-24 WO PCT/EP2003/004360 patent/WO2003091538A1/en not_active Application Discontinuation
- 2003-04-24 RU RU2004134212/03A patent/RU2311527C2/en active
- 2003-04-24 CA CA002483202A patent/CA2483202A1/en not_active Abandoned
- 2003-04-24 AU AU2003224131A patent/AU2003224131A1/en not_active Abandoned
- 2003-04-24 EP EP03720532A patent/EP1497531A1/en not_active Withdrawn
- 2003-04-24 US US10/422,293 patent/US20030213592A1/en not_active Abandoned
-
2004
- 2004-11-23 NO NO20045092A patent/NO20045092L/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847862A (en) * | 2018-08-21 | 2020-02-28 | 中国石油天然气股份有限公司 | Drainage gas production device and drainage gas production method |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2483202A1 (en) | 2003-11-06 |
| US20030213592A1 (en) | 2003-11-20 |
| CN1332121C (en) | 2007-08-15 |
| RU2311527C2 (en) | 2007-11-27 |
| RU2004134212A (en) | 2005-06-10 |
| NO20045092L (en) | 2004-11-23 |
| AU2003224131A1 (en) | 2003-11-10 |
| EP1497531A1 (en) | 2005-01-19 |
| WO2003091538A1 (en) | 2003-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103189596B (en) | Upgoing drainholes for reducing liquid-loading in gas wells | |
| RU2387812C1 (en) | Method to develop oil poll with oil-in-water systems | |
| US6708764B2 (en) | Undulating well bore | |
| CN1014337B (en) | Method of assisted production of effluent to be produced contained in geological formation | |
| US6725922B2 (en) | Ramping well bores | |
| RU2483209C1 (en) | Method of hydraulic fracturing of well formation | |
| RU2600249C1 (en) | Method and device of impact on oil-saturated formations and bottomhole zone of horizontal well | |
| RU2433250C1 (en) | Method of oil development by using periodic operation of producer wells with operation portions varying with oil well fluid density variation | |
| MX2012005941A (en) | Method of hydraulically fracturing a formation. | |
| RU2506417C1 (en) | Development method of high-viscosity oil deposit | |
| RU2627338C1 (en) | Solid carbonate oil deposits development method | |
| RU2571964C1 (en) | Hydrofracturing method for formation in well | |
| CN1656301A (en) | Method of producing hydrocarbon gas | |
| CN103912247B (en) | A kind of multistage slug Technology of gas well horizontal well | |
| RU2620099C1 (en) | Method of increasing productivity of development wells and injection capacity of injection wells | |
| RU2618544C1 (en) | Method for hydraulic fracturing of productive formation with clay layer and gas-bearing horizon | |
| CN113605874B (en) | Method for extracting coal bed gas of broken soft coal bed top and bottom double-layer horizontal well | |
| RU2269643C2 (en) | Method and system for crude oil production from well | |
| RU2225938C1 (en) | Methods for exploiting oil extracting wells | |
| RU2525563C1 (en) | Processing of wellbore zone of formation | |
| RU2055172C1 (en) | Method for hydraulic fracturing of formation | |
| RU1331U1 (en) | A device for oil production from a waterlogged well | |
| CN114109327B (en) | Oil-water well linkage profile control method | |
| RU2781721C1 (en) | Method for treatment of the bottomhole formation zone (options) | |
| RU2090742C1 (en) | Method for development of oil formation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 Termination date: 20100424 |