CN106869865B - A kind of plunger lift Combined Mining gas method integrated with foaming water discharge - Google Patents
A kind of plunger lift Combined Mining gas method integrated with foaming water discharge Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 10
- 238000005187 foaming Methods 0.000 title claims description 7
- 238000005065 mining Methods 0.000 title claims 5
- 238000011084 recovery Methods 0.000 claims abstract description 53
- 239000006260 foam Substances 0.000 claims abstract description 50
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 7
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 7
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 7
- -1 polyoxyethylene Polymers 0.000 claims abstract description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 4
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 103
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000008259 solid foam Substances 0.000 claims description 8
- 238000004090 dissolution Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- STNJBCKSHOAVAJ-UHFFFAOYSA-N Methacrolein Chemical compound CC(=C)C=O STNJBCKSHOAVAJ-UHFFFAOYSA-N 0.000 claims 2
- YFDKVXNMRLLVSL-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid;sodium Chemical compound [Na].CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O YFDKVXNMRLLVSL-UHFFFAOYSA-N 0.000 claims 1
- 229920000289 Polyquaternium Polymers 0.000 claims 1
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
- 230000007062 hydrolysis Effects 0.000 claims 1
- 238000006460 hydrolysis reaction Methods 0.000 claims 1
- 230000002269 spontaneous effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 150000005215 alkyl ethers Chemical class 0.000 abstract description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 abstract description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 abstract description 3
- 239000004088 foaming agent Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000007787 solid Substances 0.000 description 9
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000035508 accumulation Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 150000003863 ammonium salts Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005380 natural gas recovery Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
本发明涉及一种用于油气田采气工艺中的柱塞气举与泡沫排水的一体化复合采气方法。它解决现今排水采气技术中工艺单一,对井况变化复杂的井进行多项排水采气工艺复杂的问题。其技术方案是:先制作泡排棒,棒为圆柱状柱塞,其内部为柱塞主腔体,柱塞主体外表面等间距分布螺旋线形的梯形槽,槽间均布流体通孔,流体小通道连接柱塞主腔体与流体通孔;泡排棒的主要成分为聚乙二醇、十二烷基苯磺酸钠、咪唑啉、聚氧乙烯烷基醚、羧甲基纤维素;柱塞气举排水阶段,柱塞以段塞方式将液体举升出井口;柱塞主体逐渐溶解,该泡排棒沉于井底,溶解产生大量泡沫,进行泡沫排水采气。本采气方法自发进行两种排液采气工艺,流程简便,能达到排水采气的最佳效果。
The invention relates to an integrated composite gas recovery method of plunger gas lift and foam drainage used in the gas recovery process of oil and gas fields. It solves the problem of single process in current drainage and gas recovery technology, and multiple drainage and gas recovery processes for wells with complex well conditions. The technical plan is: firstly make a bubble row rod, the rod is a cylindrical plunger, the interior of which is the main cavity of the plunger, the outer surface of the plunger body is equidistantly distributed with helical trapezoidal grooves, and the fluid through holes are uniformly distributed between the grooves, and the fluid The small channel connects the main cavity of the plunger and the fluid through hole; the main components of the bubble discharge rod are polyethylene glycol, sodium dodecylbenzenesulfonate, imidazoline, polyoxyethylene alkyl ether, and carboxymethyl cellulose; In the stage of plunger gas lift drainage, the plunger lifts the liquid out of the wellhead in the form of a slug; the main body of the plunger gradually dissolves, and the foam discharge rod sinks to the bottom of the well, which dissolves and produces a large amount of foam for foam drainage and gas recovery. The gas recovery method spontaneously performs two liquid drainage and gas recovery processes, the process is simple, and the best effect of drainage and gas recovery can be achieved.
Description
技术领域technical field
本发明涉及一种用于油气田采气工艺中的柱塞气举与泡沫排水的一体化复合采气方法,属于气藏排水采气领域。The invention relates to an integrated composite gas recovery method of plunger gas lift and foam drainage used in the gas recovery process of oil and gas fields, and belongs to the field of gas reservoir drainage and gas recovery.
背景技术Background technique
气井在生产过程中不同程度的产液,气井中的液体通常是以液滴的形式分布在气相中,气体是连续相而液体是非连续相流动,液体以液滴的形式由气体携带到地面。当气相不能提供足够的能力来使井筒中的液体连续流出井口时,就会在气井井底形成积液。高压井中液体以段塞流的形式存在,它会损耗更多的地层能量,限制气井的生产能力;在低压井中积液可完全压死气井,造成气井水淹关井,使气井减产。因此,及时的排出井底积液,对产水气井采取排液采气的方法,以达到维护气井正常生产的目的。Gas wells produce liquid to varying degrees during the production process. The liquid in the gas well is usually distributed in the gas phase in the form of droplets. The gas is a continuous phase while the liquid flows in a discontinuous phase. The liquid is carried by the gas to the surface in the form of droplets. Liquid accumulations form at the bottom of gas wells when the gas phase does not provide sufficient capacity to continuously flow liquids in the wellbore out of the wellhead. Liquid in high-pressure wells exists in the form of slug flow, which will consume more formation energy and limit the production capacity of gas wells; liquid accumulation in low-pressure wells can completely crush the gas well, causing water flooding and shutting down the gas well, reducing the production of the gas well. Therefore, it is necessary to discharge the bottom fluid in time, and adopt the method of liquid drainage and gas recovery for water-producing gas wells, so as to maintain the normal production of gas wells.
柱塞气举是间歇气举的一种特殊形式,柱塞作为一种固体的密封界面,将举升气体和被举升液体分开,减少气体窜流和液体回落,提高举升气体的效率。申请号为201420751686.3的专利申请《一种智能控制柱塞气举排水采气系统》、申请号为201620692793.2的专利申请《一种改进的多功能分体式柱塞气举装置》、申请号为201620678679.4的专利申请《一种速度管柱配套柱塞气举排水采气装置》,以及申请号为201620484991.X的专利申请《一种多级柱塞气举采油装置》都是在原有的柱塞气举工艺上进行改进,只进行柱塞气举工作。泡沫排水采气是将表面活性剂注入井底,借助于天然气流的搅拌,与井底积液充气接触,产生大量较稳定的低密度含水泡沫,泡沫将井底积液携带至地面,从而达到排水采气的目的。申请号为201110046730.1的专利申请《一种泡沫排水采气井集输管道用重复发泡装置》和申请号为201110046870.9的专利申请《一种适应低温环境的泡沫排水采气注入装置》使用液体泡排剂进行液体井下泵注。申请号为200910235224.X的专利申请《一种液淹气井自生气固体泡沫排液球》、申请号为201110076848.9的专利申请《一种投捞式井下发泡剂混合装置》、申请号为200620033796.1的专利申请《一种空心固体助排剂》,以及申请号为201210047727.6的专利申请《一种用于天然气水平气井泡沫排水采气的方法》使用固体泡排剂进行固体井下投掷。泡排剂相关专利申请仅对泡沫排水采气工艺进行改进,仅进行泡沫排水采气工作。Plunger gas lift is a special form of intermittent gas lift. As a solid sealing interface, the plunger separates the lifted gas from the lifted liquid, reduces gas channeling and liquid fall, and improves the efficiency of lifting gas. Patent application with application number 201420751686.3 "An intelligent control plunger gas lift drainage and gas recovery system", patent application with application number 201620692793.2 "An improved multifunctional split plunger gas lift device", application number 201620678679.4 The patent application "A Plunger Gas Lift Drainage and Gas Production Device Supported by a Velocity String" and the patent application "A Multi-stage Plunger Gas Lift Oil Production Device" with the application number 201620484991.X are based on the original plunger gas lift The process is improved, and only the plunger gas lift is performed. Foam drainage gas recovery is to inject surfactant into the bottom of the well, and with the help of the stirring of the natural gas flow, it will come into contact with the bottom well fluid and generate a large amount of relatively stable low-density water-containing foam, which will carry the bottom well fluid to the ground, thereby achieving The purpose of drainage and gas recovery. The patent application with application number 201110046730.1 "A Repeated Foaming Device for Gathering and Transportation Pipeline of Foam Drainage and Gas Production Well" and the patent application with application number 201110046870.9 "A Foam Drainage and Gas Production Injection Device Adapted to Low Temperature Environment" use liquid foaming agent Perform liquid downhole pumping. Patent application No. 200910235224.X "A self-generating solid foam drainage ball for liquid-flooded gas wells", patent application No. 201110076848.9 "A fishing-type downhole foaming agent mixing device", application No. 200620033796.1 The patent application "A Hollow Solid Drainage Aid" and the patent application No. 201210047727.6 "A Method for Foam Drainage and Gas Recovery in Natural Gas Horizontal Gas Wells" use solid foam drainage agents for solid downhole throwing. The patent application related to the foam discharge agent only improves the foam drainage gas recovery process, and only performs the foam drainage gas recovery work.
常规排水采气工艺针对不同的井况采用不同的工艺,相对来说,柱塞气举排水采气工艺针对积液严重、自身能量较低的井,泡沫排水采气工艺针对自身能量较高的井。柱塞气举工艺和泡沫排水采气工艺能达到比较好的排水采气效果,对于井况变化复杂的井,两项工艺可结合使用,但流程繁琐,成本较高。本专利就是为了解决现今排水采气技术中工艺单一的情况下,对于井况变化复杂的井进行多项排水采气工艺繁琐的问题,可依次自发进行柱塞气举排液采气及泡沫排水采气两种工艺,流程简便,成本较低。The conventional drainage gas recovery technology adopts different processes for different well conditions. Relatively speaking, the plunger gas lift drainage gas recovery technology is aimed at wells with serious liquid accumulation and low energy, and the foam drainage gas recovery technology is aimed at wells with high energy. well. The plunger gas lift process and the foam drainage gas recovery process can achieve better drainage and gas recovery effects. For wells with complex well conditions, the two processes can be used in combination, but the process is cumbersome and the cost is high. This patent is to solve the cumbersome problem of multiple drainage and gas recovery processes for wells with complex well conditions under the single process of the current drainage gas recovery technology, and the plunger gas lift drainage gas recovery and foam drainage can be performed spontaneously in sequence There are two methods of gas extraction, the process is simple and the cost is low.
发明内容SUMMARY OF THE INVENTION
本发明目的是:为了解决现今排水采气技术中工艺单一,对于井况变化复杂的井进行多项排水采气工艺繁琐的问题,本发明依次自发进行柱塞气举排液采气及泡沫排水采气两种工艺,提出一种柱塞气举与泡沫排水的一体化复合采气方法。The purpose of the present invention is: in order to solve the problem of single process in the current drainage gas recovery technology, and the complicated problem of multiple drainage gas recovery processes for wells with complex well conditions, the present invention sequentially performs plunger gas lift liquid drainage gas recovery and foam drainage in sequence. Based on two gas recovery techniques, an integrated composite gas recovery method of plunger gas lift and foam drainage is proposed.
本发明所采用的技术方案是:The technical scheme adopted in the present invention is:
一种柱塞气举与泡沫排水的一体化复合采气方法,先根据采气井的直径制作泡排棒,泡排棒做柱塞,柱塞主体的形状为圆柱体,其内部设置有柱塞主腔体,柱塞主体外均匀分布流体通孔,柱塞主腔体与流体通孔通过设置的流体小通道连接,柱塞主腔体与流体通孔旨在提高柱塞下行速度,柱塞主体外表面等间距分布螺旋线形的梯形槽,流体在槽内以螺旋线轨迹流动可使柱塞旋转前进,能保持柱塞主体运动稳定,槽两边的突起使柱塞在上下运动过程中防止管壁内壁结盐、蜡和垢,同时也清理管壁内侧已附着的结蜡及沉垢;柱塞主体所用的材料为固体泡排剂,固体泡排剂所用原料的组分用质量百分比表示,质量以克为单位,组成及组分为:聚乙二醇12~14%,部分水解聚丙烯5~7%,咪唑啉16~18%,聚氧乙烯烷基醚12~15%,聚季铵盐10~20%,有机磷酸酯15~20%,丙烯醛3~5%,十二烷基苯磺酸钠10~20%,羧甲基纤维素5~10%;然后将该泡排棒沉于井底,进行柱塞气举排水工作,该泡排棒在井下天然气恢复压力的作用下以段塞方式将液体举升出井口;随着柱塞主体的逐渐溶解,密封性降低后,该泡排棒沉于井底起到泡排剂的作用,溶解产生大量泡沫,进行泡沫排水采气工作;自发进行柱塞气举排液采气及泡沫排水采气两种工艺,流程简便,达到排水采气的最佳效果。An integrated composite gas recovery method of plunger gas lift and foam drainage. First, foam row rods are made according to the diameter of the gas production well, and the foam row rods are used as plungers. The main body of the plunger is in the shape of a cylinder with a plunger inside. The main cavity and the fluid through holes are evenly distributed outside the plunger body. The main cavity of the plunger is connected with the fluid through holes through the small fluid channel provided. The purpose of the main cavity of the plunger and the fluid through holes is to increase the downward speed of the plunger. Helical trapezoidal grooves are distributed at equal intervals on the outer surface of the main body. The fluid flows in the grooves in a helical trajectory to make the plunger rotate and advance, which can keep the main body of the plunger moving stably. Salt, wax and scale build up on the inner wall of the pipe, and at the same time clean the wax and scale attached to the inner side of the pipe wall; the material used for the main body of the plunger is a solid foam discharge agent, and the components of the raw materials used for the solid foam discharge agent are expressed in mass percentages. The mass is in grams, and the composition and components are: polyethylene glycol 12-14%, partially hydrolyzed polypropylene 5-7%, imidazoline 16-18%, polyoxyethylene alkyl ether 12-15%, polyquaternary Ammonium salt 10-20%, organic phosphate 15-20%, acrolein 3-5%, sodium dodecylbenzenesulfonate 10-20%, carboxymethyl cellulose 5-10%; The rod sinks to the bottom of the well to carry out the plunger gas lift drainage work. Under the action of the recovery pressure of the downhole natural gas, the bubble discharge rod lifts the liquid out of the wellhead in a slug manner; as the main body of the plunger gradually dissolves, the sealing performance decreases , the foam row rod sinks to the bottom of the well to play the role of foam row agent, dissolves and produces a large amount of foam, and performs foam drainage and gas recovery; two processes of plunger gas lift gas drainage and foam drainage gas recovery are carried out spontaneously, and the process is simple , to achieve the best effect of drainage and gas recovery.
上述一种柱塞气举与泡沫排水的一体化复合采气方法中,制作柱塞主体的固体泡排剂,其密度为1.10~1.30g/cm3,略大于地层水的密度;柱塞主体的硬度较强,为洛氏23~27HRC,柱塞本体的硬度主要由固体泡排剂的配方所决定,羧甲基纤维素作为粘合剂,其组分可决定柱塞主体硬度;柱塞本体工程结构参数为:外径变化范围为58.5~62mm,柱塞主腔体直径为10~15mm,柱塞长度为40cm。In the above-mentioned integrated composite gas recovery method of plunger gas lift and foam drainage, the solid foam discharge agent for the plunger body is made with a density of 1.10-1.30g/cm 3 , which is slightly greater than the density of formation water; the plunger body The hardness is relatively strong, which is Rockwell 23-27HRC. The hardness of the plunger body is mainly determined by the formula of the solid foaming agent. Carboxymethyl cellulose is used as a binder, and its components can determine the hardness of the plunger body; The structural parameters of the main body engineering are: the outer diameter ranges from 58.5 to 62 mm, the diameter of the main cavity of the plunger is 10 to 15 mm, and the length of the plunger is 40 cm.
与现有技术相比,本发明具有以下有益效果:(1)将柱塞气举排液采气和泡沫排水采气结合使用,步骤简单,效益明显,适用范围广;(2)柱塞由泡排剂组成,无需回收,节约成本;(3)将固体泡排剂注入至气井,特别是直井井筒最底端,使得整个井筒内充满泡沫流体,排水采气效果明显;(4)操作简单安全,使用方便快捷,省时省力,成本低廉,对环境友好。Compared with the prior art, the present invention has the following beneficial effects: (1) The plunger is used in combination with gas extraction by gas lift and foam drainage, with simple steps, obvious benefits, and wide application range; (2) the plunger is composed of Composition of foaming agent, no need to recycle, saving cost; (3) Inject solid foaming agent into the gas well, especially the bottom of the vertical wellbore, so that the entire wellbore is filled with foam fluid, and the effect of drainage and gas recovery is obvious; (4) Simple operation Safe, convenient and quick to use, time-saving and labor-saving, low cost, and friendly to the environment.
附图说明Description of drawings
图1是本发明所使用的做柱塞的泡排棒的结构示意图。Fig. 1 is the structure schematic diagram of the bubble discharge stick used as plunger used in the present invention.
图2是图1所示泡排棒结构的剖视图。Fig. 2 is a cross-sectional view of the bubble discharge rod structure shown in Fig. 1 .
图中:1.流体通孔,2.螺旋线形的梯形槽,3.流体小通道,4.柱塞主体,5.柱塞主腔体。In the figure: 1. Fluid through hole, 2. Helical trapezoidal groove, 3. Fluid small channel, 4. Plunger main body, 5. Plunger main cavity.
具体实施方式Detailed ways
下面结合附图对本发明做进一步说明。The present invention will be further described below in conjunction with the accompanying drawings.
如图1、图2所示,本发明一种柱塞气举与泡沫排水的一体化复合采气方法,先根据采气井的直径制作泡排棒,泡排棒做柱塞,柱塞主体4的形状为圆柱体,其内部有柱塞主腔体5,柱塞主体4外均匀分布流体通孔1,柱塞主腔体5与流体通孔1通过流体小通道3连接,柱塞主腔体5与流体通孔1旨在提高柱塞下行速度,柱塞主体4外表面等间距分布螺旋线形的梯形槽2,流体在槽内以螺旋线轨迹流动使柱塞旋转前进,能保持柱塞主体4运动稳定,槽两边的突起使柱塞在上下运动过程中防止管壁内壁结盐、蜡和垢,同时也清理管壁内侧已附着的结蜡及沉垢;柱塞主体4所用的材料为固体泡排剂,固体泡排剂所用原料的组分用质量百分比表示,质量以克为单位,组成及组分为:聚乙二醇13%,部分水解聚丙烯6%,咪唑啉18%,聚氧乙烯烷基醚13%,聚季铵盐12%,有机磷酸酯16%,丙烯醛4%,十二烷基苯磺酸钠11%,羧甲基纤维素7%;然后将该泡排棒沉于井底,进行柱塞气举排水工作,该泡排棒在井下天然气恢复压力的作用下以段塞方式将液体举升出井口;随着柱塞主体4的逐渐溶解,密封性降低后,该泡排棒沉于井底起到泡排剂的作用,溶解产生大量泡沫,进行泡沫排水采气工作;自发进行柱塞气举排液采气及泡沫排水采气两种工艺,流程简便,能够达到排水采气的最佳效果。As shown in Figure 1 and Figure 2, the present invention is an integrated composite gas recovery method of plunger gas lift and foam drainage. First, foam row rods are made according to the diameter of the gas production well, and the foam row rods are used as plungers. The main body of the plunger is 4 The shape of the cylinder is cylindrical, and there is a plunger main cavity 5 inside. The fluid through holes 1 are evenly distributed outside the plunger main body 4. The plunger main cavity 5 is connected with the fluid through hole 1 through a small fluid channel 3. The body 5 and the fluid through hole 1 are designed to increase the downward speed of the plunger. The outer surface of the plunger body 4 is equidistantly distributed with helical trapezoidal grooves 2. The fluid flows in the groove with a helical trajectory to make the plunger rotate and advance, which can keep the plunger The movement of the main body 4 is stable, and the protrusions on both sides of the groove prevent the plunger from accumulating salt, wax and scale on the inner wall of the pipe wall during the up and down movement, and at the same time clean the wax and sediment attached to the inner side of the pipe wall; the material used for the plunger main body 4 It is a solid foaming agent, and the components of the raw materials used in the solid foaming agent are expressed in mass percentages, and the mass is in grams. The composition and components are: polyethylene glycol 13%, partially hydrolyzed polypropylene 6%, imidazoline 18% , polyoxyethylene alkyl ether 13%, polyquaternary ammonium salt 12%, organic phosphate 16%, acrolein 4%, sodium dodecylbenzene sulfonate 11%, carboxymethyl cellulose 7%; then the The foam row rod sinks to the bottom of the well to perform the plunger gas lift drainage work. The foam row rod lifts the liquid out of the wellhead in a slug manner under the action of the downhole natural gas recovery pressure; with the gradual dissolution of the plunger main body 4, the sealing After the performance is reduced, the foam row rod sinks to the bottom of the well to play the role of foam discharge agent, dissolves and produces a large amount of foam, and performs foam drainage and gas recovery work; spontaneously carry out two processes of plunger gas lift drainage gas recovery and foam drainage gas recovery , the process is simple, and can achieve the best effect of drainage and gas recovery.
制作柱塞主体4的固体泡排剂,其密度为1.20g/cm3,略大于地层水的密度。柱塞本体4的硬度较强,为洛氏26HRC,柱塞本体的硬度主要由固体泡排剂的配方所决定,羧甲基纤维素作为粘合剂,其组分可决定柱塞主体硬度。柱塞主体4工程结构参数为:外径为60mm,柱塞主腔体直径为12mm,柱塞长度为40cm。The solid foaming agent used to make the plunger body 4 has a density of 1.20 g/cm 3 , which is slightly greater than the density of formation water. The hardness of the plunger body 4 is relatively strong, which is Rockwell 26HRC. The hardness of the plunger body is mainly determined by the formula of the solid foaming agent. Carboxymethyl cellulose is used as a binder, and its components can determine the hardness of the plunger body. The engineering structural parameters of the plunger main body 4 are: the outer diameter is 60mm, the diameter of the plunger main cavity is 12mm, and the plunger length is 40cm.
根据实际的生产情况、地层特征以及井深结构可以设计泡排剂及粘合剂的用量,从而达到排水采气的最佳效果。本发明提供的这种柱塞气举与泡沫排水一体化复合采气方法,综合柱塞气举排水工艺及泡沫排水采气工艺。在柱塞气举排水阶段,该柱塞在井下天然气恢复压力的作用下以段塞方式将液体举升出井口,滑脱损失小。柱塞主腔体5及流体通孔1旨在提高柱塞的下行速度,柱塞主体4外表面等间距分布螺旋线形的梯形槽2,流体在槽内以螺旋线轨迹流动可使柱塞旋转前进,能保持柱塞主体4运动稳定,槽两边的突起使柱塞在上下运动过程中防止管壁内壁结盐、蜡和垢,同时也清理管壁内侧已附着的结蜡及沉垢。一段时间后随着柱塞主体4的逐渐溶解,密封性降低,该泡排棒沉于井底又起到泡排剂的作用,溶解产生大量泡沫,进入泡沫排水采气阶段,柱塞气举和泡沫排水采气综合使用,流程简便,可达到排水采气的最佳效果。本发明提供的这种作柱塞的泡排棒的密度为1.20g/cm3,略大于地层水的密度,目的在于柱塞在井筒中能沉没在液面之下,起到柱塞作用,同时作为泡排剂使用时泡排棒在井筒中低于液面的位置运动,且保持较低的运动阻力。柱塞本体4的硬度主要由作为粘合剂的羧甲基纤维素的组分所决定,柱塞主体4硬度要求较高,为洛氏26HRC,避免强度过低引起过早溶解、提前失效。本发明流程简便,效益明显,可达到排水采气的最佳效果。According to the actual production situation, formation characteristics and well depth structure, the amount of foaming agent and adhesive can be designed, so as to achieve the best effect of drainage and gas recovery. The plunger gas lift and foam drainage integrated composite gas recovery method provided by the present invention is a comprehensive plunger gas lift drainage process and foam drainage gas recovery process. In the stage of plunger gas lift drainage, the plunger lifts the liquid out of the wellhead in a slug manner under the action of downhole natural gas recovery pressure, and the slippage loss is small. The plunger main cavity 5 and the fluid through hole 1 are designed to increase the downward speed of the plunger. The outer surface of the plunger body 4 is equidistantly distributed with helical trapezoidal grooves 2, and the fluid flows in the groove in a helical trajectory to make the plunger rotate. Advance, can keep plunger main body 4 to move stably, the protrusion on both sides of groove makes plunger prevent the inner wall of pipe wall from forming salt, wax and dirt in the process of moving up and down, and also clean up the attached wax and sediment on the inner side of pipe wall simultaneously. After a period of time, with the gradual dissolution of the plunger main body 4, the sealing performance is reduced, and the foam discharge rod sinks to the bottom of the well and acts as a foam discharge agent. It dissolves and produces a large amount of foam, and enters the stage of foam drainage and gas recovery, and the plunger is gas-lifted Combined with foam drainage and gas recovery, the process is simple and can achieve the best effect of drainage and gas recovery. The density of the bubble discharge rod used as a plunger provided by the present invention is 1.20g/cm 3 , which is slightly greater than the density of the formation water. At the same time, when used as a foaming agent, the foaming rod moves below the liquid level in the wellbore and maintains low movement resistance. The hardness of the plunger body 4 is mainly determined by the component of carboxymethyl cellulose as the binder. The hardness of the plunger body 4 is required to be higher, which is Rockwell 26HRC, so as to avoid premature dissolution and premature failure caused by too low strength. The process of the invention is simple, the benefit is obvious, and the best effect of water drainage and gas recovery can be achieved.
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CN107975355B (en) * | 2017-10-30 | 2020-11-06 | 中国石油天然气股份有限公司 | Foam and plunger gas lift combined drainage gas recovery method and device |
CN108102635B (en) * | 2017-12-21 | 2020-06-16 | 大庆金军石油科技开发有限公司 | Gas well drainage-assisting complexing agent |
CN109736757B (en) * | 2019-01-03 | 2021-06-22 | 中国石油天然气集团有限公司 | Production increasing method for reducing pressure loss in gas well by using compressor |
CN111764878A (en) * | 2020-07-07 | 2020-10-13 | 成都立联科能源科技有限公司 | Nano-foam lifting liquid drainage gas production rod and preparation method and application thereof |
CN113046049B (en) * | 2021-03-29 | 2022-05-06 | 西南石油大学 | Multi-water-layer four-dispersion foam scrubbing agent for natural gas horizontal well |
CN113292983A (en) * | 2021-06-15 | 2021-08-24 | 中石化重庆页岩气有限公司 | Floating foam discharging rod for gas production of oil and gas field and preparation method thereof |
CN113982536B (en) * | 2021-10-28 | 2024-08-13 | 中海石油(中国)有限公司海南分公司 | Drainage gas production plug and composite drainage gas production process |
CN116104452B (en) * | 2021-11-09 | 2025-03-25 | 中国石油天然气集团有限公司 | Two-stage relay plunger lifting device and method for horizontal wells and movable ball core plunger |
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