CN103450929B - The method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery - Google Patents
The method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery Download PDFInfo
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Abstract
The invention discloses a kind of method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery, A, build SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, this system its be in upstream its oil outlet of single water-and-oil separator by connection line be communicated be in the single oily-water seperating equipment fluid inlet in downstream, oil-water separation system least significant end oil outlet is communicated with cleaned crude oil temporary storage tank fluid inlet by lead line, connection line and/or lead line are provided with in-line viscometer, lighter hydrocarbons export pipeline is communicated with super-viscous oil Produced Liquid export pipeline or is communicated with connection line or is communicated with the pipeline section of lead line between oil-water separation system least significant end oil outlet and the in-line viscometer being arranged on lead line, B, store enough lighter hydrocarbons at the total storage tank of lighter hydrocarbons, C, pass into super-viscous oil Produced Liquid to super-viscous oil Produced Liquid export pipeline, open frequency conversion fluid filling pump and also start in-line viscometer, D, when after the lighter hydrocarbons discharge capacity that frequency conversion fluid filling pump pumps into pipeline is adjusted to Qo to such an extent as to the viscosity number of in-line viscometer collection reaches reasonable viscosity value Vo time, then the lighter hydrocarbons discharge capacity Qo keeping frequency conversion fluid filling pump to pump into is constant.The present invention extends super heavy oil transportation distance further, reduces costs.
Description
Technical field
The present invention relates to oil recovery technical field, belong to the oil Combined Mining receiving method, the particularly method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery that high viscous crude floor treatment technique and gathering and transportation technology are carried out global optimization.
Background technology
At present, most of China onshore oil field thin oil block mining operations enters mid-later development phase, special thick oil, super-viscous oil block exploitation cause is imperative, because density 50 DEG C time of this kind of special thick oil, super-viscous oil is close to 1g/cm3, viscosity is greater than 1 × 106mpa.s, mobility is very poor, and oil recovery in the past, floor treatment technique by high viscous crude from extraction in pit shaft, cannot purify super thick (former) oily water ratio and be difficult to lower than 5%.Although existing SAGD (lift gravity assists the displacement of reservoir oil) technology solves the technical barrier of oil recovery aspect, but the easy emulsification of moisture SAGD super-viscous oil Produced Liquid and oily water separation is difficult, for guaranteeing to purify the standard that rear super thick (former) oily water ratio is less than 1.5%, volume gain several times of oily water separating equipment and system temperature need maintain more than 140 DEG C, cause that the processing efficiency of dehydration equipment is low, energy consumption is high, simultaneously in the defeated process of high viscous crude collection, also need to consume a large amount of heat energy power consumptions, economy is poor.At present, existing high viscous crude collection transmission scheme in high viscous crude, mixes thin oil or by high viscous crude cracking on the spot, reduce high viscous crude viscosity, be convenient to collect defeated high viscous crude, this directly causes downstream refined oil product such as pitch, lubricating oil quality significantly to decline, benefit is deteriorated, and required a large amount of thin oil resources cannot obtain sufficient guarantee.
Summary of the invention
The object of the present invention is to provide a kind of method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery, shorten super thick (former) oily Produced Liquid oily water separation time, significantly reduce emulsion splitter consumption and collection defeated temperature, pressure, further prolongation super heavy oil transportation distance, reduce production cost, reduce intermediate heating station quantity or without the need to intermediate heating station, also do not affect downstream petroleum products quality.
The object of the present invention is achieved like this: a kind of method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery, implementation step is followed successively by: A, build SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, this system comprises the long-range line of pipes of cleaned crude oil and oil-water separation system, by the total storage tank of lighter hydrocarbons, lighter hydrocarbons temporary storage tank, by the frequency conversion fluid filling pump of Frequency Converter Control rotating speed, in-line viscometer, oil-water separation system, cleaned crude oil temporary storage tank, refinery atmospheric distillation plant, vacuum breaker and pipeline are formed, pipeline comprises super-viscous oil Produced Liquid export pipeline and lead line, the total storage tank of lighter hydrocarbons goes out head piece and is communicated with lighter hydrocarbons temporary storage tank inflow port by lighter hydrocarbons intake pipeline, lighter hydrocarbons temporary storage tank goes out head piece and is communicated with lighter hydrocarbons export pipeline by frequency conversion fluid filling pump, lighter hydrocarbons export pipeline is installed with the vacuum breaker that the lighter hydrocarbons in its pipe can be prevented to be back to lighter hydrocarbons temporary storage tank, oil-water separation system is made up of N level oily-water seperating equipment and has initial end fluid inlet and least significant end oil outlet, every grade of oily-water seperating equipment is made up of M water-and-oil separator, its oil outlet of single water-and-oil separator being in upstream is communicated with the single oily-water seperating equipment fluid inlet being in downstream by connection line, super-viscous oil Produced Liquid export pipeline one brings out the liquid mouth of pipe and is communicated with oil-water separation system initial end fluid inlet, oil-water separation system least significant end oil outlet is communicated with cleaned crude oil temporary storage tank fluid inlet by lead line, connection line and/or lead line are provided with the in-line viscometer of the super-viscous oil viscosity that energy real-time detection is flowed in its body, lighter hydrocarbons export pipeline is communicated with super-viscous oil Produced Liquid export pipeline or is communicated with connection line or is communicated with the pipeline section of lead line between oil-water separation system least significant end oil outlet and the in-line viscometer being arranged on lead line, cleaned crude oil temporary storage tank liquid outlet is communicated with refinery atmospheric distillation plant initial end fluid inlet by the long-range line of pipes of cleaned crude oil, refinery atmospheric distillation plant least significant end lighter hydrocarbons go out head piece and feed back the total storage tank inflow port of pipeline connection lighter hydrocarbons by lighter hydrocarbons, B, store enough lighter hydrocarbons at the total storage tank of lighter hydrocarbons, C, pass into super-viscous oil Produced Liquid to its other end feed liquor mouth of pipe of super-viscous oil Produced Liquid export pipeline, start frequency conversion fluid filling pump and also open in-line viscometer, D, according to in-line viscometer corresponding the gathered viscosity number being mixed with the flowing super-viscous oil of lighter hydrocarbons in connection line and/or lead line periodically in real time, corresponding adjustment frequency conversion fluid filling pump injects the lighter hydrocarbons discharge capacity of super-viscous oil Produced Liquid export pipeline, after the lighter hydrocarbons discharge capacity injecting super-viscous oil Produced Liquid export pipeline when frequency conversion fluid filling pump is adjusted to Qo to such an extent as to when the viscosity number being mixed with the super-viscous oil of lighter hydrocarbons being positioned at connection line and/or lead line of in-line viscometer Real-time Collection reaches reasonable viscosity value Vo, adjustment frequency conversion fluid filling pump is then stopped to inject the lighter hydrocarbons discharge capacity of super-viscous oil Produced Liquid export pipeline immediately and the lighter hydrocarbons discharge capacity Qo keeping frequency conversion fluid filling pump to annotate in super-viscous oil Produced Liquid export pipeline is constant, described reasonable viscosity value Vo be when the super-viscous oil being mixed with lighter hydrocarbons in the long-range line of pipes of cleaned crude oil, be only subject to power that SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery internal system produce and by force feed to refinery atmospheric distillation plant time, the viscosity number being mixed with the super-viscous oil of lighter hydrocarbons in connection line and/or lead line measured by in-line viscometer.
The present invention can need be implemented by SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, with water-and-oil separator (thermochemistry, electrothermal chemical sedimentation device) fluid inlet, the pipeline (super-viscous oil Produced Liquid export pipeline or oily water separation pipeline) that oil outlet is communicated with is provided with lighter hydrocarbons filler, lighter hydrocarbons export pipeline one end mouth of pipe passes into lighter hydrocarbons filler, water-and-oil separator is then positioned at super thick (former) oily well head, metering plant, petroleum transferring station or joint station, when super-viscous oil Produced Liquid is injected in super-viscous oil Produced Liquid export pipeline, the lighter hydrocarbons (solute or solvent) of institute of the present invention recycle are pumped into super-viscous oil Produced Liquid export pipeline or oily water separation pipeline in through lighter hydrocarbons export pipeline and lighter hydrocarbons filler by frequency conversion fluid filling pump from lighter hydrocarbons temporary storage tank, (lighter hydrocarbons (Sweet natural gas of super-viscous oil Produced Liquid export pipeline or oily water separation pipeline is pumped into through lighter hydrocarbons filler with the SAGD super-viscous oil extraction liquid-phase mixing being positioned at super-viscous oil Produced Liquid export pipeline or oily water separation pipeline, liquefied gas, condensate oil, straight-run spirit, straight-run diesel oil, coker gasoline, coker gas oil one of them or its both or both above combined composite components arbitrarily) determine super-viscous oil Produced Liquid with the blending ratio of super-viscous oil Produced Liquid or purify by it super thick (former) oil viscosity got), after being mixed by hydraulic mixing (or static mixer) again, super-viscous oil Produced Liquid oil phase can be made to reach more than 99% the viscosity degradation rate of 50 DEG C, oily water separation time shorten 30%, purify its mileage through Cemented filling of super thick (former) oil not only significantly to be extended, and collection delivery of energy consumption obviously declines.The oil refining link of lighter hydrocarbons (solute or solvent) in downstream refinery that the present invention mixes SAGD super-viscous oil distills again be recycled to the total storage tank of lighter hydrocarbons by atmospheric distillation plant, the lighter hydrocarbons that the total storage tank of lighter hydrocarbons stores are more successively through lighter hydrocarbons intake pipeline, lighter hydrocarbons temporary storage tank return be passed to (field joint stations) mix mouth (lighter hydrocarbons filler), again enter SAGD super-viscous oil Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, mix the SAGD super-viscous oil Produced Liquid just going out well, and be distilled out through atmospheric distillation plant together with SAGD super-viscous oil, finally returned and transported to the total storage tank of lighter hydrocarbons, the rest may be inferred, so that by SAGD super-viscous oil Produced Liquid profit sharp separation and super-viscous oil long distance delivery system constantly recirculation utilize, therefore, the total amount of the present invention's lighter hydrocarbons used at least substantially remains unchanged within a very long time.
Can draw from specific embodiment of the invention operating mode, the present invention can carry out quick oily water separation to SAGD (lift gravity assists the displacement of reservoir oil: SteamAssistedGravityDrainage) super thick (former) oily Produced Liquid, without the need to the long-range line of pipes zone heating to purification super thick (former) oil, purify the temperature of super thick (former) oil in the process that (in the long-range line of pipes of cleaned crude oil) collects defeated lower than 100 DEG C, its chemical demulsifier consumption is less than 200mg/L, significantly extend the long-range fed distance of its purification through processed super thick (former) oil, and the present invention is by oil field high viscous crude dewatering unit, downstream refinery refining unit is integrated into an Iarge-scale system, achieve the exploitation of collection super thick (former) oil, integrate super-viscous oil complex bacteria tearen technology that is defeated and refining, rational in infrastructure compact, oily water separation efficiency can be increased substantially, reduce the production of energy consumption and super thick (former) oil and the defeated cost of collection, in addition, lighter hydrocarbons (solute or solvent) can be recycled completely by existing technical process, circulation, save valuable limited fossil resources.Visible, the invention has the beneficial effects as follows: shorten super thick (former) oily Produced Liquid oily water separation time, significantly reduce emulsion splitter consumption and collection defeated temperature, pressure, further prolongation super heavy oil transportation distance, reduce production cost (materials cost and energy consumption cost), reduce intermediate heating station quantity or without the need to intermediate heating station, also do not affect downstream petroleum products quality.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the syndeton schematic diagram of SAGD Produced Liquid profit sharp separation of the present invention and super-viscous oil long distance delivery system;
Fig. 2 is the anatomical connectivity schematic diagram of frequency conversion fluid filling pump Controlling System embodiment 1 of the present invention;
Fig. 3 is the anatomical connectivity schematic diagram of frequency conversion fluid filling pump Controlling System embodiment 2 of the present invention;
Fig. 4 is the anatomical connectivity schematic diagram of frequency conversion fluid filling pump Controlling System embodiment 3 of the present invention;
Fig. 5 is the anatomical connectivity schematic diagram of frequency conversion fluid filling pump Controlling System embodiment 4 of the present invention.
Embodiment
Technical pattern of the present invention by the restriction of following limited quantity embodiment, can not determine concrete embodiment according to technical scheme of the present invention and practical condition.
A kind of method of SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery, implementation step is followed successively by: A, build SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, as shown in Figure 1, this system (its part existing system itself possesses gather and delivery pump) comprises the long-range line of pipes 16 of cleaned crude oil and oil-water separation system, by the total storage tank 1 of lighter hydrocarbons, lighter hydrocarbons temporary storage tank 3, the frequency conversion fluid filling pump 5 of rotating speed is controlled by frequency transformer 19, in-line viscometer 21, oil-water separation system, cleaned crude oil temporary storage tank 14, refinery atmospheric distillation plant 17, vacuum breaker 7 and pipeline are formed, pipeline comprises super-viscous oil Produced Liquid export pipeline 8 and lead line, the total storage tank 1 of lighter hydrocarbons goes out head piece and is communicated with lighter hydrocarbons temporary storage tank 3 inflow port by lighter hydrocarbons intake pipeline 2, lighter hydrocarbons temporary storage tank 3 goes out head piece and is communicated with lighter hydrocarbons export pipeline 6 by frequency conversion fluid filling pump 5, lighter hydrocarbons export pipeline 6 is installed with the vacuum breaker 7 that the lighter hydrocarbons in its pipe can be prevented to be back to lighter hydrocarbons temporary storage tank 3, oil-water separation system is made up of N level oily-water seperating equipment and has initial end fluid inlet and least significant end oil outlet, every grade of oily-water seperating equipment is made up of M water-and-oil separator, its oil outlet of single water-and-oil separator being in upstream is communicated with the single oily-water seperating equipment fluid inlet being in downstream by connection line, super-viscous oil Produced Liquid export pipeline 8 one brings out the liquid mouth of pipe and is communicated with oil-water separation system initial end fluid inlet, oil-water separation system least significant end oil outlet is communicated with cleaned crude oil temporary storage tank 14 fluid inlet by lead line, connection line and/or lead line are provided with the in-line viscometer 21 of the super-viscous oil viscosity that energy real-time detection is flowed in its body, lighter hydrocarbons export pipeline 6 is communicated with super-viscous oil Produced Liquid export pipeline 8 or is communicated with connection line or is communicated with the pipeline section of lead line between oil-water separation system least significant end oil outlet and the in-line viscometer 21 being arranged on lead line, cleaned crude oil temporary storage tank 14 liquid outlet is communicated with refinery atmospheric distillation plant 17 initial end fluid inlet by the long-range line of pipes 16 of cleaned crude oil, refinery atmospheric distillation plant 17 least significant end lighter hydrocarbons go out head piece and are communicated with lighter hydrocarbons total storage tank 1 inflow port by lighter hydrocarbons feedback pipeline 18, B, store enough lighter hydrocarbons at the total storage tank of lighter hydrocarbons 1, C, pass into super-viscous oil Produced Liquid to its other end feed liquor mouth of pipe of super-viscous oil Produced Liquid export pipeline 8, start frequency conversion fluid filling pump 5 and also open in-line viscometer 21, D, according to in-line viscometer 21 corresponding the gathered viscosity number being mixed with the flowing super-viscous oil of lighter hydrocarbons in connection line and/or lead line periodically in real time, corresponding adjustment frequency conversion fluid filling pump 5 injects the lighter hydrocarbons discharge capacity of super-viscous oil Produced Liquid export pipeline 8, after the lighter hydrocarbons discharge capacity injecting super-viscous oil Produced Liquid export pipeline 8 when frequency conversion fluid filling pump 5 is adjusted to Qo to such an extent as to when the viscosity number being mixed with the super-viscous oil of lighter hydrocarbons being positioned at connection line and/or lead line of in-line viscometer 21 Real-time Collection reaches reasonable viscosity value Vo, adjustment frequency conversion fluid filling pump 5 is then stopped to inject the lighter hydrocarbons discharge capacity of super-viscous oil Produced Liquid export pipeline 8 immediately and the lighter hydrocarbons discharge capacity Qo keeping frequency conversion fluid filling pump 5 to annotate in super-viscous oil Produced Liquid export pipeline 8 is constant, described reasonable viscosity value Vo be when the super-viscous oil being mixed with lighter hydrocarbons in the long-range line of pipes 16 of cleaned crude oil, be only subject to power (pressure) that SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery internal system produce and by force feed to refinery atmospheric distillation plant 17 time, the viscosity number being mixed with the super-viscous oil of lighter hydrocarbons in connection line and/or lead line measured by in-line viscometer 21.
Lighter hydrocarbons are Sweet natural gases, in liquefied gas, condensate oil, straight-run spirit, straight-run diesel oil, coker gasoline, coker gas oil and kerosene any one or for by wherein arbitrarily two or more combination form.
As shown in Figure 1, N=2, M=1, namely oil-water separation system is made up of two-stage oily-water seperating equipment, and every grade of oily-water seperating equipment is made up of a water-and-oil separator, and in-line viscometer 21 is divided into the first in-line viscometer 11 and the second in-line viscometer 15, super-viscous oil Produced Liquid export pipeline 8 one brings out the fluid inlet that the liquid mouth of pipe connects the first water-and-oil separator 9, the corresponding fluid inlet as the first water-and-oil separator 9 of oil-water separation system initial end fluid inlet, described connection line is the first single connection line 10, described lead line is the first single lead line 13, the oil outlet of the first water-and-oil separator 9 is communicated with the oil-in of the second water-and-oil separator 12 by the first connection line 10, first connection line 10 is provided with first in-line viscometer 11 of energy real-time detection at its Bottomhole pressure liquid viscosity, the oil outlet of the second water-and-oil separator 12 is communicated with cleaned crude oil temporary storage tank 14 fluid inlet by the first lead line 13, the corresponding oil outlet as the second water-and-oil separator 12 of oil-water separation system least significant end oil outlet, first lead line 13 is provided with second in-line viscometer 15 of energy real-time detection at its Bottomhole pressure liquid viscosity, lighter hydrocarbons export pipeline 6 is communicated with super-viscous oil Produced Liquid export pipeline 8.
As mark in Fig. 1 A point to dotted line circle shown in part, lighter hydrocarbons export pipeline 6 (being represented by dotted lines) is communicated with the first connection line 10, or part shown in the dotted line circle that B points to as marked in Fig. 1, lighter hydrocarbons export pipeline 6 (being represented by dotted lines) is communicated with the pipeline section of the first lead line 13 between oil-water separation system least significant end oil outlet and the in-line viscometer 21 being arranged on the first lead line 13.
Reasonable viscosity value Vo is [300mpa.s-500mpa.s], and the length L span of the long-range line of pipes 16 of cleaned crude oil is L >=20km, and the caliber of the long-range line of pipes of cleaned crude oil 16 is conventional caliber 273mm.
Cleaned crude oil long-range line of pipes 16 outer tube perisporium is enclosed with thermal insulation layer, and the span of L is 100km≤L≤130km.
As shown in Figure 1, lighter hydrocarbons export pipeline 6 is installed with the tensimeter 4 that can detect lighter hydrocarbons pressure in its pipe.
As shown in Figure 2, Figure 4 shows, in-line viscometer 21 signal output part is by the first signal transfer limes 200 connection control device 20 signal input part, or as shown in Fig. 3, Fig. 5, in-line viscometer 21 signal output part connects the first radio transmitters 22 signal input part by the first signal conductor 220, and the first wireless receiver 23 signal output part is by second signal wire 230 connection control device 20 signal input part; As shown in Figure 2 and Figure 3, controller 20 signal output part connects frequency transformer 19 signal input part by second signal transfer limes 190, or as shown in Figure 4, Figure 5, controller 20 signal output part connects the second radio transmitters 24 signal input part by the 3rd signal conductor 240, and the second wireless receiver 25 signal output part connects frequency transformer 19 signal input part by the 4th signal conductor 250; As shown in Figures 2 to 5, frequency transformer 19 signal output part connects the signal input part of frequency conversion fluid filling pump 5 by the 5th signal conductor 50.
The viscosity data that SAGD Produced Liquid profit sharp separation of the present invention and super-viscous oil long distance delivery system can make controller 20 provide according to in-line viscometer 21 controls the rotating speed of frequency conversion fluid filling pump 5 by frequency transformer 19 intelligent independent, to adjust frequency conversion fluid filling pump 5 lighter hydrocarbons discharge capacity in real time, by the defeated efficiency of collection of controller 20 Automated condtrol SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, therefore, need to work out the erasable of the viscosity data passed back according to in-line viscometer and corresponding control frequency conversion fluid filling pump 5 lighter hydrocarbons discharge capacity or only reader (controlling for industrial automation process) by computer to controller 20, controller 20 is made to run this erasable or only reader, the function of intelligent independent adjustment frequency conversion fluid filling pump 5 lighter hydrocarbons discharge capacity can be possessed, in addition, the viscosity data that in-line viscometer 21 is gathered by a pair wireless signal transceiver sends to (be arranged on downstream refinery or recover the oil on-the-spot) controller 20, controller 20 also sends control signal to frequency transformer by a pair wireless signal transceiver, the change of convenient (in downstream refinery or recover the oil on-the-spot) viscosity that watchstander's real-time remote monitoring in-line viscometer 21 gathers and frequency conversion fluid filling pump 5 lighter hydrocarbons discharge capacity.
A certain Application Example of the present invention is: in the total storage tank of lighter hydrocarbons 1, inject the lighter hydrocarbons of (single or mixing) (as viscosity-depression agent, it is Sweet natural gas, liquefied gas, condensate oil, straight-run spirit, straight-run diesel oil, coker gasoline, in coker gas oil and kerosene any one or for by wherein arbitrarily two or more combination form), open frequency conversion fluid filling pump 5, by lighter hydrocarbons empirically indoor predetermined mixed ratio (namely the lighter hydrocarbons quality of the discharge capacity Qo of frequency conversion fluid filling pump 5 corresponding to it relative to SAGD super-viscous oil Produced Liquid flow corresponding to the ratio of quality) pump in super-viscous oil Produced Liquid export pipeline 8 and/or connection line and/or lead line, after going out well SAGD super-viscous oil Produced Liquid (by hydraulic mixing and/or static mixer) Homogeneous phase mixing with oil field, after the first water-and-oil separator 9 dewaters, become the high viscous crude that water ratio is low, the second water-and-oil separator 12 is entered again through the first connection line 10, first online viscometer 11 is arranged on the first lead line 13, according to the lighter hydrocarbons discharge capacity (quality namely corresponding to frequency conversion fluid filling pump lighter hydrocarbons discharge capacity) to the analysis and Control frequency conversion fluid filling pump 5 at the first lead line 13 gained viscosity data, ensure rational viscosity break ratio, improve SAGD (lift gravity assists the displacement of reservoir oil: SteamAssistedGravityDrainage) super-viscous oil (Produced Liquid) velocity of separation in the second follow-up equipment such as water-and-oil separator 12 grade, reduce purification super-viscous oil viscosity further simultaneously, to reach the object reducing the defeated temperature of purification SAGD super-viscous oil collection, the purification SAGD super-viscous oil being mixed with lighter hydrocarbons is delivered to (downstream) refinery through the long-range line of pipes 16 of cleaned crude oil, and be fractionated in (downstream) refinery atmospheric water distilling apparatus (unit), the lighter hydrocarbons purifying SAGD super thick (former) oil are distilled, are recycled in the total storage tank 1 of lighter hydrocarbons, the lighter hydrocarbons reclaimed are returned by lighter hydrocarbons export pipeline 2 and are passed to (field joint stations) lighter hydrocarbons temporary storage tank 3, so far, the lighter hydrocarbons of recovery complete one action circulation.
Scientific experiment proves, (liquid or gaseous state) lighter hydrocarbons have good viscosity reduction effect to super-viscous oil, lighter hydrocarbons serve as viscosity reduction solute or solvent by the present invention, utilize similar dissolve mutually theory to reduce the viscosity of SAGD super-viscous oil in the long-range line of pipes 16 of cleaned crude oil.
Such as: with Feng Cheng oil field SAGD super-viscous oil Produced Liquid for experimental subjects, the lighter hydrocarbons of institute of the present invention recycle are coker gas oil, if coker gas oil mixed ratio (%) is defined as: the coker gas oil quality of the discharge capacity Qo of frequency conversion fluid filling pump 5 corresponding to it relative to SAGD super-viscous oil Produced Liquid flow corresponding to the ratio of quality, coker gas oil mixed ratio is by following (specification sheets most end) coker gas oil viscosity reduction experimental data table (i.e. coker gas oil mixed ratio, the data sheet that temperature is corresponding with SAGD super thick (former) oil viscosity), if select the coker gas oil mixed ratio of 10%, then can guarantee that temperature is that (mixing) SAGD super thick (former) oil viscosity of 90 DEG C can be less than 500mpa.s, as other coker gas oil mixed ratio selected by needs, can refer to following (specification sheets most end) coker gas oil viscosity reduction experimental data table to carry out correspondence according to different temperature and draw different SAGD super thick (former) oil viscosity (differing temps and corresponding different SAGD super thick (former) oil viscosity of different coker gas oil mixed ratios).Although coker gas oil is the type in all lighter hydrocarbons, but scientific fact proves, the lighter hydrocarbons of recycle of the present invention are as Sweet natural gas, liquefied gas, condensate oil, straight-run spirit, straight-run diesel oil, coker gasoline, the mixture of any one or wherein any two kinds or any two or more combinations in coker gas oil and kerosene, according to the rule of organism (solute and solvent) similar compatibility, they all can be used as viscosity-depression agent, can dissolve each other with (as solvent or solute) SAGD super thick (former) oil or be dissolved among SAGD super thick (former) oil, in like manner, repeatedly verified by practice, when SAGD super thick (former) oil (Produced Liquid) temperature-resistant time, SAGD super thick (former) oil viscosity (can be contrasted in the definition of coker gas oil mixed ratio along with the lighter hydrocarbons mixed ratio comprising coker gas oil, namely the lighter hydrocarbons quality of the lighter hydrocarbons discharge capacity of frequency conversion fluid filling pump 5 corresponding to it relative to SAGD super-viscous oil Produced Liquid flow corresponding to the ratio of quality) progressively raising correspondingly to reduce gradually, even if in the process that SAGD super thick (former) oil (Produced Liquid) is transferred to downstream refinery (atmospheric distillation plant) in the long-range line of pipes 16 of cleaned crude oil, the impact that its temperature can be subject to atmospheric temperature progressively reduces and is cooled to normal temperature, if but ensure enough lighter hydrocarbons mixed ratios, just the negative impact causing viscosity to rise because of temperature drop can be offset, or even when lighter hydrocarbons mixed ratio is enough high, the viscosity of SAGD super thick (former) oil when normal temperature being mixed with lighter hydrocarbons is starkly lower than the SAGD not being mixed with lighter hydrocarbons super thick (former) innage in the viscosity of normal temperature.
Claims (7)
1. the method for a SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery, its steps characteristic is followed successively by: A, build SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery system, this system comprises the long-range line of pipes of cleaned crude oil (16) and oil-water separation system, it is characterized in that: by the total storage tank of lighter hydrocarbons (1), lighter hydrocarbons temporary storage tank (3), the frequency conversion fluid filling pump (5) of rotating speed is controlled by frequency transformer (19), in-line viscometer (21), oil-water separation system, cleaned crude oil temporary storage tank (14), refinery atmospheric distillation plant (17), vacuum breaker (7) and pipeline are formed, pipeline comprises super-viscous oil Produced Liquid export pipeline (8) and lead line, the total storage tank of lighter hydrocarbons (1) goes out head piece and is communicated with lighter hydrocarbons temporary storage tank (3) inflow port by lighter hydrocarbons intake pipeline (2), lighter hydrocarbons temporary storage tank (3) goes out head piece and is communicated with lighter hydrocarbons export pipeline (6) by frequency conversion fluid filling pump (5), lighter hydrocarbons export pipeline (6) is installed with the vacuum breaker (7) that the lighter hydrocarbons in its pipe can be prevented to be back to lighter hydrocarbons temporary storage tank (3), oil-water separation system is made up of N level oily-water seperating equipment and has initial end fluid inlet and least significant end oil outlet, every grade of oily-water seperating equipment is made up of M water-and-oil separator, its oil outlet of single water-and-oil separator being in upstream is communicated with the single oily-water seperating equipment fluid inlet being in downstream by connection line, super-viscous oil Produced Liquid export pipeline (8) one brings out the liquid mouth of pipe and is communicated with oil-water separation system initial end fluid inlet, oil-water separation system least significant end oil outlet is communicated with cleaned crude oil temporary storage tank (14) fluid inlet by lead line, connection line and/or lead line are provided with the in-line viscometer (21) of the super-viscous oil viscosity that energy real-time detection is flowed in its body, lighter hydrocarbons export pipeline (6) is communicated with super-viscous oil Produced Liquid export pipeline (8) or connection connection line or connection lead line and is positioned at oil-water separation system least significant end oil outlet and is arranged on the pipeline section between the in-line viscometer (21) on lead line, cleaned crude oil temporary storage tank (14) liquid outlet is communicated with refinery atmospheric distillation plant (17) initial end fluid inlet by the long-range line of pipes of cleaned crude oil (16), refinery atmospheric distillation plant (17) least significant end lighter hydrocarbons go out head piece and feed back pipeline (18) connection lighter hydrocarbons total storage tank (1) inflow port by lighter hydrocarbons, B, store enough lighter hydrocarbons at the total storage tank of lighter hydrocarbons (1), C, pass into super-viscous oil Produced Liquid to its other end feed liquor mouth of pipe of super-viscous oil Produced Liquid export pipeline (8), start frequency conversion fluid filling pump (5) and also open in-line viscometer (21), D, according to in-line viscometer (21) corresponding the gathered viscosity number being mixed with the flowing super-viscous oil of lighter hydrocarbons in connection line and/or lead line periodically in real time, corresponding adjustment frequency conversion fluid filling pump (5) injects the lighter hydrocarbons discharge capacity of super-viscous oil Produced Liquid export pipeline (8), after the lighter hydrocarbons discharge capacity injecting super-viscous oil Produced Liquid export pipeline (8) when frequency conversion fluid filling pump (5) is adjusted to Qo to such an extent as to when the viscosity number being mixed with the super-viscous oil of lighter hydrocarbons being positioned at connection line and/or lead line of in-line viscometer (21) Real-time Collection reaches reasonable viscosity value Vo, adjustment frequency conversion fluid filling pump (5) is then stopped to inject the lighter hydrocarbons discharge capacity of super-viscous oil Produced Liquid export pipeline (8) and keep the lighter hydrocarbons discharge capacity Qo of frequency conversion fluid filling pump (5) filling in super-viscous oil Produced Liquid export pipeline (8) constant immediately, described reasonable viscosity value Vo be when the super-viscous oil being mixed with lighter hydrocarbons in the long-range line of pipes of cleaned crude oil (16), be only subject to power that SAGD Produced Liquid profit sharp separation and super-viscous oil long distance delivery internal system produce and by force feed to refinery atmospheric distillation plant (17) time, the viscosity number being mixed with the super-viscous oil of lighter hydrocarbons in connection line and/or lead line measured by in-line viscometer (21).
2. the method for SAGD Produced Liquid profit sharp separation according to claim 1 and super-viscous oil long distance delivery, is characterized in that: lighter hydrocarbons are Sweet natural gases, in liquefied gas, condensate oil, straight-run spirit, straight-run diesel oil, coker gasoline, coker gas oil and kerosene any one or for by wherein arbitrarily two or more combination form.
3. the method for SAGD Produced Liquid profit sharp separation according to claim 1 and super-viscous oil long distance delivery, it is characterized in that: N=2, M=1, in-line viscometer (21) is divided into the first in-line viscometer (11) and the second in-line viscometer (15); super-viscous oil Produced Liquid export pipeline (8) one brings out the fluid inlet that the liquid mouth of pipe connects the first water-and-oil separator (9), the corresponding fluid inlet as the first water-and-oil separator (9) of oil-water separation system initial end fluid inlet, described connection line is single the first connection line (10), described lead line is single the first lead line (13), the oil outlet of the first water-and-oil separator (9) is communicated with the oil-in of the second water-and-oil separator (12) by the first connection line (10), first connection line (10) is provided with first in-line viscometer (11) of energy real-time detection at its Bottomhole pressure liquid viscosity, the oil outlet of the second water-and-oil separator (12) is communicated with cleaned crude oil temporary storage tank (14) fluid inlet by the first lead line (13), the corresponding oil outlet as the second water-and-oil separator (12) of oil-water separation system least significant end oil outlet, first lead line (13) is provided with second in-line viscometer (15) of energy real-time detection at its Bottomhole pressure liquid viscosity, lighter hydrocarbons export pipeline (6) is communicated with super-viscous oil Produced Liquid export pipeline (8).
4. the method for SAGD Produced Liquid profit sharp separation according to claim 1 and super-viscous oil long distance delivery, it is characterized in that: reasonable viscosity value Vo is [300mpa.s-500mpa.s], and the length L span of the long-range line of pipes of cleaned crude oil (16) is L >=20km.
5. the method for SAGD Produced Liquid profit sharp separation according to claim 4 and super-viscous oil long distance delivery, it is characterized in that: on the long-range line of pipes of cleaned crude oil (16) outer tube perisporium, be enclosed with thermal insulation layer, the span of L is 100km≤L≤130km.
6. the method for SAGD Produced Liquid profit sharp separation according to claim 1 and super-viscous oil long distance delivery, is characterized in that: on lighter hydrocarbons export pipeline (6), be installed with the tensimeter (4) that can detect lighter hydrocarbons pressure in its pipe.
7. the method for SAGD Produced Liquid profit sharp separation according to claim 1 and super-viscous oil long distance delivery, it is characterized in that: in-line viscometer (21) signal output part is by the first signal transfer limes (200) connection control device (20) signal input part, or in-line viscometer (21) signal output part connects the first radio transmitters (22) signal input part by the first signal conductor (220), the first wireless receiver (23) signal output part is by second signal wire (230) connection control device (20) signal input part; Controller (20) signal output part connects frequency transformer (19) signal input part by second signal transfer limes (190), or controller (20) signal output part connects the second radio transmitters (24) signal input part by the 3rd signal conductor (240), the second wireless receiver (25) signal output part connects frequency transformer (19) signal input part by the 4th signal conductor (250); Frequency transformer (19) signal output part connects frequency conversion fluid filling pump (5) signal input part by the 5th signal conductor (50).
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| CN102102024A (en) * | 2009-12-16 | 2011-06-22 | 中国石油天然气集团公司 | High temperature thermochemical settling dehydration method for SAGD super thick oil produced liquid |
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| CN102102024A (en) * | 2009-12-16 | 2011-06-22 | 中国石油天然气集团公司 | High temperature thermochemical settling dehydration method for SAGD super thick oil produced liquid |
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