阅读说明：本技术 一种气田油气水混输管道清管段塞分相处理方法 (A kind of gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method ) 是由 何小明 于 2019-09-06 设计创作，主要内容包括：本发明实施例公开了一种气田油气水混输管道清管段塞分相处理方法,包括以下步骤：S1:设置油气田某区域包含5条地底管道,分别设置为A平台、B平台、C平台、D平台和E平台,以B平台至E平台油、气、水三相混输管道进行段塞控制分析；S2：采集计算数据,设置计算基础条件；S3：在E平台上设置段塞流捕集器的安装情况；S4：对清管工况模拟分析；S5：下游平台段塞流捕集器尺寸进行；S6：分析各种清管段塞控制方法的优缺点。本发明充分利用了E平台闭排罐和下游海管输送裕量,下游平台可以仅按照正常输送工况产生的水力段塞体积设置段塞流捕集器,操作灵活,节省投资。(The embodiment of the invention discloses a kind of gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing methods, the following steps are included: S1: oil gas field region comprising 5 bottom pipeline is arranged, it is respectively set to A platform, B platform, C platform, D platform and E platform, slug control analysis is carried out with B platform to E platform oil, gas and water three-phase mixed transferring pipeline；S2: acquisition calculates data, and setting calculates basic condition；S3: the installation situation of slug catcher is set on E platform；S4: to pigging operating condition sunykatuib analysis；S5: downstream platform slug catcher size carries out；S6: the advantage and disadvantage of various pigging slug control methods are analyzed.The present invention takes full advantage of E platform closed tank platoon and downstream sea pipe conveying allowance, and can slug catcher only be arranged according to the waterpower slug volume that normal conveying operating condition generates in downstream platform, and flexible operation is reduced investment outlay.)

1. a kind of gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method, which comprises the following steps:

S1: oil gas field region comprising 5 bottom pipeline is set, it is flat to be respectively set to A platform, B platform, C platform, D platform and E Platform carries out slug control analysis with B platform to E platform oil, gas and water three-phase mixed transferring pipeline；

S2: acquisition calculates data, and setting calculates basic condition；

S3: the installation situation of slug catcher is set on E platform；

S4: to pigging operating condition sunykatuib analysis；

S5: downstream platform slug catcher size is compared；

S6: the advantage and disadvantage of various pigging slug control methods are analyzed.

2. gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method according to claim 1, it is characterised in that: The according to circumstances design needs to need E platform strict control weight, and slug catcher cannot be arranged on E platform Greatly, finally determine that E platform is only capable of the slug catcher that 2 dischargeable capacitys of setting are 15m.

3. gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method described in claim 1, it is characterised in that: described Work condition analogue is divided into three kinds of operating conditions；Wherein operating condition one is normal swabber's condition, and pigging process whole production logistics pushes clear Pipe ball carries out pigging operation；Pipe outlet pressure is improved when operating condition two is pigging, to reduce pigging speed, to reach control The purpose of pigging slug；Control production logistics amount carries out pigging operation when operating condition three is pigging, and water supply well is closed before pigging can be with Dispersed phase holdup in managing is reduced, to reduce pigging slug flow；Gas well and part producing well are closed when pigging, can extend pigging section Plug is released the time.

4. gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method according to claim 1, it is characterised in that: It is described that pigging simulation model is established using OLGA dynamic simulation software.

5. gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method according to claim 1, it is characterised in that: The slug according to calculating is as a result, face can be occupied with the size of slug catcher under preresearch estimates difference operating condition and platform Product.

Technical field

The present embodiments relate to pigging slug processing technology fields, and in particular to a kind of gas field mixed transportation of oil and gas pipeline is clear Pipeline section plug split-phase processing method.

Background technique

Since gas-liquid is bigger during gas field collection is defeated, gas flow rate is higher, and fluidised form is usually with a clearance flow, laminar flow and annular flow It is main, it will appear local slug flow in low-lying location, conveying crushing is also smaller.Under normal conveying, liquid phase can be in treatment plant Entrance enters purification device after separating by gravitational separator.And in pigging operating condition, the liquid being detained in pipeline is in short-term Interior by concentration discharge line, this partially liq volume is larger, and the time of discharge is shorter, and liquid plug can be full of separator moment, makes The purifying device for natural gas cisco unity malfunction in downstream.Therefore, this liquid seperating plug how is received, guarantees the production of downstream purification device Operating condition is steady, the difficult point for using gas-liquid delivery technique to be conveyed with regard to becoming onshore.

Summary of the invention

For this purpose, the embodiment of the present invention provides a kind of gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method, with solution Certainly in the prior art oil-gas transportation difficult point the problem of.

To achieve the goals above, the embodiment of the present invention provides the following technical solutions: a kind of gas field mixed transportation of oil and gas pipeline Pigging slug split-phase processing method, comprising the following steps:

S1: oil gas field region comprising 5 bottom pipeline is set, it is flat to be respectively set to A platform, B platform, C platform, D platform and E Platform carries out slug control analysis with the oil of B platform to E platform, gas and water three-phase mixed transferring pipeline；

S2: acquisition calculates data, and setting calculates basic condition；

S3: the installation situation of slug catcher is set on E platform；

S4: to pigging operating condition sunykatuib analysis；

S5: downstream platform slug catcher size is compared；

S6: the advantage and disadvantage of various pigging slug control methods are analyzed.

Preferably, the according to circumstances design needs to need E platform strict control weight, and slug flow is caught on E platform Storage cannot be arranged it is excessive, it is final to determine that E platform is only capable of the slug catcher that 2 dischargeable capacitys of setting are 15m.

Preferably, the Work condition analogue is divided into three kinds of operating conditions；Wherein operating condition one is normal swabber's condition, pigging process Whole production logistics push spherical pig to carry out pigging operation；Pipe outlet pressure is improved when operating condition two is pigging, to reduce pigging Speed, to achieve the purpose that control pigging slug；Control production logistics amount carries out pigging operation, pigging when operating condition three is pigging Preceding closing water supply well can reduce dispersed phase holdup in pipe, to reduce pigging slug flow；Gas well and part producing are closed when pigging Well can extend releasing the time for pigging slug.

Preferably, described that pigging simulation model is established using OLGA dynamic simulation software.

Preferably, the slug according to calculating is as a result, can be with the ruler of slug catcher under preresearch estimates difference operating condition Very little and platform area occupied.

The embodiment of the present invention has the advantages that it is not conventional that water supply well, gas well and part producing well are closed in the present invention Way needs strict control platform area, weight due to the particularity of the project, need to be controlled using above method, existing When the operation of field, need to formulate switch well stream journey in detail, to guarantee production safety；Control for pigging slug, often root Take one or more of control methods to achieve the goal according to situation consideration, specific method need according to the different defeated conditions of pipe, The demand of operator and economy determines；Take full advantage of E platform closed tank platoon and downstream sea pipe conveying allowance, downstream platform Slug catcher only can be set according to the waterpower slug volume that normal conveying operating condition generates, flexible operation is reduced investment outlay.

Detailed description of the invention

It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis The attached drawing of offer, which is extended, obtains other implementation attached drawings.

Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents can cover.

Fig. 1 is the system flow chart of the embodiment of the present invention.

Specific embodiment

Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.

A kind of gas field mixed transportation of oil and gas pipeline cleaning slug split-phase processing method, comprising the following steps:

S1: oil gas field region comprising 5 bottom pipeline is set, it is flat to be respectively set to A platform, B platform, C platform, D platform and E Platform carries out slug control analysis with the oil of B platform to E platform, gas and water three-phase mixed transferring pipeline；

S2: acquisition calculates data, and setting calculates basic condition；

S3: the installation situation of slug catcher is set on E platform；

S4: to pigging operating condition sunykatuib analysis；

S5: downstream platform slug catcher size is compared；

S6: the advantage and disadvantage of various pigging slug control methods are analyzed.

Preferably, the according to circumstances design needs to need E platform strict control weight, and slug flow is caught on E platform Storage cannot be arranged it is excessive, it is final to determine that E platform is only capable of the slug catcher that 2 dischargeable capacitys of setting are 15m.

Preferably, the Work condition analogue is divided into three kinds of operating conditions；Wherein operating condition one is normal swabber's condition, pigging process Whole production logistics push spherical pig to carry out pigging operation；Pipe outlet pressure is improved when two pigging of operating condition, to reduce pigging speed Degree, to achieve the purpose that control pigging slug；Production logistics amount is controlled when three pigging of operating condition and carries out pigging operation, is closed before pigging Dispersed phase holdup in pipe can be reduced by closing water supply well, to reduce pigging slug flow；Gas well and part producing well are closed when pigging, it can To extend releasing the time for pigging slug.

Preferably, described to establish pigging simulation model using OLGA dynamic simulation software, OLGA is generally to recognize in the world Accurately to carry out the software of technique dynamic analog to multiphase flow pipeline, its advantage is that having stronger slug flowable state Analog functuion.Its main feature is that multiple functional, accuracy in computation is higher, and the severe slug data of OLGA have obtained SINTEF experiment The verifying of room and Schmidt data, analog result is tested through circuit and Field Production Data compares, and predicted value and actual value are kissed It closes well, using the transient simulation function of OLGA software, the insurmountable dispersed phase holdup in static simulation pipe design can be solved The problems such as formation, slug tracking.

Preferably, the slug according to calculating is as a result, can be with the ruler of slug catcher under preresearch estimates difference operating condition Very little and platform area occupied, E platform are center processing platform, and being equipped with the equipment such as closed tank platoon, displacement pump can in pigging operation To consider to make full use of the closed tank platoon dischargeable capacity of E platform and the conveying allowance of downstream submarine pipeline；Concrete operations process are as follows: clear When pipe operation, opens the by-pass line of slug catcher and closed tank platoon and caught when slug flow reaches downstream platform into slug flow Enter production separator after storage, is processed into after aqueous 20% emulsion and next stage pipeline is delivered to by output pump；Exceed The slug flow of production separator processing capacity is bypassed from slug catcher to closed tank platoon, into slug flow a part of closed tank platoon Next stage pipeline is transported to by displacement pump；Another part is temporarily stored in closed tank platoon, after the completion of pigging operations, passes through life It produces outer defeated after separator is handled.

In summary:

Section control method is cleaned, slug flow is usually directed to two parameters, i.e. slug flow volume and slug flow is released the time, for The control of pigging slug should account in terms of the two.

Slug flow volume control methodology, slug flow volume is directly proportional to interior dispersed phase holdup is managed, and before pigging operation, manages interior dispersed phase holdup Bigger, the slug flow volume that pigging process generates is also bigger, and the dispersed phase holdup reduced in pipe can effectively reduce slug flow volume, i.e., By increasing gas liquid ratio, increase the fluid-carrying capability of gas phase to reduce the dispersed phase holdup in pipe, it when specific operation can be defeated by increasing Tolerance reduces amount of infusion realization；

Slug flow is released, and the time is related to spherical pig speed, and in pigging process, reduction spherical pig speed can extend slug flow and let out The time is put, to alleviate the pressure that downstream process treatment facility receives pigging slug, extends slug and releases the method packet of time It includes: in pigging operation, properly increasing pipe outlet pressure；Or the appropriate pipeline throughput rate that reduces can reduce gas phase and liquid phase stream Speed is equivalent to and extends releasing the time for pigging slug.

Slug flow is a kind of flow pattern frequently encountered in marine multiphase pipe flow, when tube fluid is in slug flow, gas phase and liquid Alternate flowing, and it is a kind of typical unstable period that pipeline pressure, outlet gas-liquid instantaneous flow, which have very great fluctuation process,.By formation Principle slug flow is divided into following three kinds: (1) hydrodynamic force slug flow, and gas-liquid specific speed is exactly in the slug of flow pattern in pipeline Range is flowed, the transient state slug flow that the gentle flow quantity variation of common stable state waterpower slug flow induces can be subdivided into；(2) hypsography lures Slug flow is sent out, liquid phase causes the slug flow of gas passage blocking and formation in the low-lying place's accumulation of pipeline, often lower in gas-liquid flow velocity Shi Fasheng；(3) serious slug flow (Severe Slugging) is defined as the slug flow that slug length is greater than pipeline riser height, Chang Low gas-liquid flow issues life；This slug flowing pressure and outlet gas-liquid instantaneous flow fluctuation are maximum, endanger also most pipe-line equipment Greatly；Severe Slugging often betides in sea risers, and forming process includes that liquid plug is formed, liquid plug increases, liquid plug flow is gentle out Four-stage is discharged in body, and liquid plug flow goes out after standpipe to enter the reception device of platform, and the gas-liquid in standpipe is constantly discharged at this time, when When gas pressure is less than the static pressure of accumulating liquid, liquid stops flowing out and flowing back into standpipe bottom under the influence of gravity restarting Accumulation gradually forms next section of liquid plug, starts new round circulation

Although above having used general explanation and specific embodiment, the present invention is described in detail, in the present invention On the basis of, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, not These modifications or improvements on the basis of deviation spirit of that invention, fall within the scope of the claimed invention.