WO2011069340A1 - 便于将井下过滤器管柱拔出的油气井结构及管柱拔出方法 - Google Patents

便于将井下过滤器管柱拔出的油气井结构及管柱拔出方法 Download PDF

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Publication number
WO2011069340A1
WO2011069340A1 PCT/CN2010/002015 CN2010002015W WO2011069340A1 WO 2011069340 A1 WO2011069340 A1 WO 2011069340A1 CN 2010002015 W CN2010002015 W CN 2010002015W WO 2011069340 A1 WO2011069340 A1 WO 2011069340A1
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WO
WIPO (PCT)
Prior art keywords
downhole filter
oil
particles
filter string
downhole
Prior art date
Application number
PCT/CN2010/002015
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English (en)
French (fr)
Inventor
裴柏林
房娜
Original Assignee
安东石油技术(集团)有限公司
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Filing date
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Application filed by 安东石油技术(集团)有限公司 filed Critical 安东石油技术(集团)有限公司
Priority to NO20120798A priority Critical patent/NO346845B1/no
Priority to CA2783392A priority patent/CA2783392A1/en
Priority to GB201211951A priority patent/GB2489161B/en
Priority to US13/514,505 priority patent/US20120279716A1/en
Publication of WO2011069340A1 publication Critical patent/WO2011069340A1/zh

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08Obtaining fluid samples or testing fluids, in boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/08Screens or liners
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/04Gravelling of wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/02Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
    • E21B49/04Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using explosives in boreholes; using projectiles penetrating the wall

Definitions

  • Oil and gas wells here refer to generalized production wells in oil and gas field development, including oil wells, gas wells, natural gas wells, injection wells, etc. Background technique
  • the completion structures of most mechanical sand control wells include oil and gas wells and downhole filter columns in oil and gas wells. Vertical and horizontal wells, inclined wells, high-angle wells and horizontal wells.
  • reference numeral 1 in Fig. 1 indicates a well wall
  • reference numeral 2 indicates a downhole filter string
  • reference numeral 3 indicates an annulus between the downhole filter string and the well wall
  • attached Figure 4 indicates the packer that suspends the downhole filter string.
  • the downhole filter column here is a generalized downhole filter column, which can be used in various forms, such as:
  • the first case is a non-throttle function downhole filter column, and then the throttling function downhole filter tube
  • the column is just a sand control filter, also known as a sand control tube.
  • the second type is a filter with a flow control function, that is, a flow control filter column, also called a flow control screen.
  • the flow control filter has a flow control function and has a filtering function.
  • the filtering function sometimes prevents the turbulent flow of the granulating medium outside the flow control filter from entering the wellbore, and also prevents the formation sand from entering the wellbore. .
  • the flow control function of the flow control filter also has a throttling function.
  • a downhole filter string is one that has one or more downhole filters connected in series. For example, if a sand pipe with a total length of 300 meters is placed in a horizontal well, 30 sand pipes of about 10 meters are connected in series.
  • the downhole filter column is stored outside
  • the gravel includes quartz sand or ceramsite; the other case is that there is no filler outside the downhole filter column, if the downhole filter column There is no filling outside.
  • the produced formation sand will also fill the annulus between the filter column and the wall of the well.
  • Figure 5 shows the filtration under the well. Formation sand or artificially filled gravel accumulated outside the column.
  • the extracted downhole filter string needs to be reused to save a lot of expenses
  • the technical problem to be solved by the present invention is to provide an oil and gas well structure that facilitates the extraction of the downhole filter string and a method of extracting the downhole filter string from the oil and gas well.
  • the present invention adopts the following technical solutions:
  • the present invention relates to an oil and gas well structure for facilitating the extraction of a downhole filter string, comprising a wellbore wall and a downhole filter string inserted into the oil and gas well, the downhole filter
  • the end of the pipe string near the wellhead is the upper end of the filter pipe string, the upper end of the filter pipe string is fixedly connected with the well wall, and an annular space is formed between the downhole filter pipe string and the well wall; the downhole filter pipe string and The annulus between the well walls is filled with ultra-light particles, wherein the ultra-light particles have a density close to or equal to the density of the ultra-light particle carrying liquid, and the ultra-light particle carrying liquid is used for carrying the ultra-light particles.
  • the liquid in the annulus or backflushed from the ultra-light particles carries out the liquid of the annulus.
  • the density difference between the ultralight particles and the ultralight particle carrier fluid ranges from -0.35 to +0.35, inclusive.
  • the density difference between the ultra-light particles and the ultra-light particle carrying liquid ranges from -0.3 to +0.3, inclusive.
  • the ultra-light particles are particles having an average particle diameter of 0.05 to 1.2 mm and a true density of 0.7 to 1.3 g/cm 3 .
  • the ultra-light particles are particles having an average particle diameter of 0.05 to 0.8 mm and a true density of 0.94 to 1.08 g/cm 3 .
  • the ultra-light particles are high molecular polymer particles.
  • the ultra-light particles are high-density polyethylene particles having an average particle diameter of 0.05 to 0.8 mm and a true density of 0.90 to 0.98 g/cm 3 .
  • the ultra-light particles are polypropylene and polyvinyl chloride polymer particles having an average particle diameter of 0.05 to 0.8 mm and a true density of 0.7 to 1.3 g/cm 3 .
  • the ultra-light particles are styrene and divinylbenzene crosslinked copolymer particles having an average particle diameter of 0.05 to 0.8 mm and a true density of 0.94 to 1.08 g/cm 3 .
  • the invention also discloses a method for proposing a downhole filter string from the oil and gas well structure for facilitating the extraction of a downhole filter string, the method comprising the steps of:
  • the step of emptying the ultra-light particles by the recoil carrier liquid is connected by using a liquid injection pipe and a downhole filter pipe column, directly injecting into the control flow filter column
  • Light particle carrying liquid due to the flow control function of the flow control filter column, the injection liquid is injected into the ultralight particles from the control flow pipe column, and the underground fluid is filtered through the upper filter pipe column.
  • the ultra-light particles accumulated outside the column are emptied.
  • the step of emptying the ultra-light particles by the recoil carrier liquid is to insert the liquid injection pipe into the downhole filter pipe column, and the liquid injection pipe is used for injecting the liquid;
  • the lower part of the injection pipe has an opening, and the upper part of the opening of the injection pipe is provided with a sealing ring, the outer diameter of the sealing ring is substantially the same as the inner diameter of the downhole filter column, and the liquid injection method is a segmented injection: the liquid injection pipe Stepping from the top of the downhole filter string to the bottom of the downhole filter column for segmented injection, segmenting the ultra-light particles outside the downhole filter column, outside the previous section of the downhole filter column near the wellhead After the ultra-light particles are emptied, the injection tube is further inserted into the downhole filter column for a period of time until the downhole filter tube column is completely emptied; or the injection tube can be continuously moved to inject the liquid until the well filter column is emptied outside the column.
  • the step of flushing the ultra-light particles by the recoil carrier liquid is to insert the injection pipe into the downhole filter column, and the injection pipe is used for injection.
  • the liquid injection pipe has an opening at a lower portion thereof, and a sealing ring is disposed at an upper portion of the opening of the liquid injection pipe, and an outer diameter of the sealing ring is substantially the same as an inner diameter of the downhole filter pipe string, and the liquid injection method is a segment injection:
  • the injection pipe is gradually advanced from the top of the downhole filter pipe string to the bottom of the downhole filter pipe column for segmental injection, and the ultra-light particles outside the downhole filter pipe column are segmented and emptied, and the former section of the downhole filter near the wellhead is used.
  • the injection tube is further inserted into the downhole filter column for a period of time until the downhole filter column is completely emptied.
  • the injection tube can be moved by continuously moving the injection tube until the empty filter column is emptied. Light particles.
  • the ultralight particle carrier liquid of the present invention is water or an aqueous solution.
  • the invention utilizes ultra-light particle carrying liquid with a density of about 1 g/cm 3 to select ultra-light particles with a real density and a density of the carrying liquid very close, so that the carrier liquid can easily carry ultra-light particles to the downhole filter.
  • the annulus between the string and the borehole wall fills and fills the annulus between the downhole filter string and the borehole wall, a portion of the carrier fluid enters the downhole filter string and returns to the ground, and a portion of the carrier fluid passes through the borehole wall. Infiltrating into the formation; eventually forming a completion structure filled with ultra-light particles in the annulus between the downhole filter string and the wellbore.
  • the ultra-light particles occupy the annulus between the downhole filter string and the borehole wall, and also block the accumulation of formation sand within the annulus between the downhole filter string and the borehole wall.
  • the invention selects particles with an average particle diameter of 0.05-1.2 mm and a true density of 0.7-l, 3 g/cm 3 as ultra-light particles filled in the annulus between the downhole filter column and the well wall, when it is necessary to propose a downhole
  • the ultra-light particles accumulated outside the downhole filter column can be easily emptied. Since the density of the ultra-light particles and the density of the carrier liquid are very close, the carrier liquid of the low-speed cycle can be easily ultra-light.
  • the particles are brought to the surface to empty the annulus outside the downhole filter column, so that the downhole filter column can be easily extracted from the well. Meet the requirements for proposing a downhole filter string.
  • the method of the invention is simple and feasible, overcomes the difficulty in extracting the downhole filter column in the oil well, facilitates the production, and the cleaned ultra-light particles can be reused, thereby greatly reducing the production cost.
  • Figure 1 is a schematic view of the completion structure of the background art.
  • FIG. 2 is a schematic view of a completion structure according to Embodiment 1 of the present invention.
  • FIG 3 is an ultra-light outside the column of the recoil empty filter according to Embodiment 2 of the present invention; Schematic diagram of the flow path of the particles carrying the particles.
  • Fig. 4 is a schematic view showing the flow path of the ultra-light particles carrying the ultra-light particles outside the column of the backflushing filter according to the third embodiment of the present invention.
  • Fig. 5 is a schematic view showing the flow path of the ultra-light particles carrying the ultra-light particles outside the column of the backflushing filter according to the fourth embodiment of the present invention.
  • FIG. 6 is a schematic view showing the structure of an oil and gas well after emptying ultra-light particles according to the present invention. detailed description
  • the present invention provides an oil and gas well structure for facilitating the extraction of a downhole filter string, including an oil and gas well wall 1 and a downhole filter string 2 that is lowered into the oil and gas well, the downhole filter string
  • a packer 4 for suspending the downhole filter string is disposed between one end of the wellhead and the well wall, and an annular space is formed between the downhole filter string and the well wall; between the downhole filter string and the well wall
  • the annulus is filled with ultra-light particles 6.
  • Embodiment 1 Controlled flow filter column extraction method
  • the completion structure according to Embodiment 1, wherein the ultra-light particles are polypropylene and polyvinyl chloride having an average particle diameter of 0.05-0.8 mm and a true density of 0.7-1.3 g/cm 3 .
  • the downhole filter column is a flow control filter column 2, and the downhole filter column is provided with a flow control filter 2-1; the method for lifting the downhole filter column is as follows:
  • the recoil carrying liquid empties the ultra-light particles:
  • the injection pipe column is connected with the downhole filter pipe column to directly inject the carrier liquid into the control flow filter column, because the flow control filter tube
  • the flow control of the column, the carrier liquid is uniformly injected into the ultra-light particles from the various sections of the downhole filter column through the flow control filter; the direction of the arrow in Figure 3 is the method of carrying liquid flow.
  • Embodiment 3 Controlled flow filter column extraction method
  • the completion structure according to Embodiment 1, wherein the ultra-light particles are styrene and divinylbenzene having an average particle diameter of 0.05-0.8 mm and a true density of 0.94-1.08 g/cm 3 .
  • Crosslinking copolymer particles are styrene and divinylbenzene having an average particle diameter of 0.05-0.8 mm and a true density of 0.94-1.08 g/cm 3 .
  • the downhole filter column is a flow control filter column 2, and the downhole filter column is provided with a flow control filter 2-1; the downhole filter column is lifted by:
  • the recoil carrier liquid empties the ultra-light particles: the liquid injection pipe 7 is inserted into the downhole filter pipe string, and the liquid injection pipe is used for injecting liquid; the liquid injection pipe has an opening at the bottom, and a sealing seal is arranged at the upper part of the opening. 8.
  • the outer diameter of the sealing ring is substantially the same as the inner diameter of the downhole filter string.
  • the liquid injection method is a segmented injection: the injection pipe is gradually advanced from the top of the downhole filter pipe column to the bottom of the downhole filter pipe column. The segmented liquid injection and the partial emptying of the ultra-light particles outside the downhole filter column.
  • the sealing ring can inject the liquid carrying the injection pipe into the downhole filter column to block the lower side of the sealing ring.
  • the concentrated carrier liquid impacts the deposition of ultra-light particles.
  • the injection pipe is further inserted into the downhole filter column to the next section until underground.
  • the ultra-light particles outside the filter column are completely emptied; this also avoids the carrier liquid from acting on the ultra-light particles that initiate the deposition, A large amount of carrier liquid.
  • the direction of the arrow in Figure 4 is the flow direction of the carrier fluid.
  • the dashed line in Figure 4 indicates that the injection tube is progressively deep into the sub-filter column for in-situ injection.
  • the manner in which the injection pipe penetrates the downhole filter column can be a continuous hook-and-height approach.
  • the continuously injecting tube is continuously injected, and the ultra-light particles are emptied and the depth is continuously increased until the ultra-light particles outside the downhole filter column are completely emptied.
  • the direction of the arrow in Figure 4 is the method of carrying liquid flow
  • the downhole filter column is a non-throttled downhole filter column 2
  • the method for lifting the downhole filter column is as follows:
  • the recoil carrying liquid empties the ultra-light particles: the liquid injection pipe 7 is inserted into the downhole filter pipe string, and the liquid injection pipe is used for injecting liquid; the top of the liquid injection pipe is provided with a sealing ring 8, the sealing ring The outer diameter of the outer diameter of the downhole filter column is basically the same.
  • the sealing ring of the injection pipe is slightly lower at the outlet port 9 of the injection pipe.
  • the injection method is a segmented injection: the injection pipe is made of a downhole filter. The top of the pipe string is gradually drilled deep into the bottom of the downhole filter pipe column for segmented injection, and the ultra-light particles outside the downhole filter pipe column are emptied by the segment.
  • the sealing ring can inject the liquid carrying pipe into the downhole filter pipe string to block the lower side of the sealing ring in the downhole filter pipe string, and the carrier liquid is difficult to enter the upper side of the sealing ring, thus, Where the upper side is emptied, there will be no more incoming liquid from the filter string, and the concentrated carrying liquid will empty the ultra-light particles that need to be emptied. When the upper section of the downhole filter column near the wellhead is emptied, the ultra-light particles are emptied.
  • the liquid injection pipe is further inserted into the downhole filter pipe column until the underground filter pipe column is completely emptied; this also avoids the running of the liquid, saves a large amount of carrier liquid, and maintains a high flush and ultralight The flow rate of the particles.
  • the direction of the arrow in Fig. 5 is the flow direction of the carrier liquid.
  • the dashed line in the figure indicates that the injection tube is gradually infiltrated into the downhole filter column.
  • the manner in which the injection pipe penetrates the downhole filter column can be intermittently deep. The intermittently moving injection tube is continuously infused until the ultra-light particles outside the downhole filter column are completely emptied.
  • the carrier liquid described in Examples 2-4 may be water or an aqueous solution of a commonly used additive for oil fields in water.
  • the method of the invention is simple and feasible, overcomes the difficulty in extracting the downhole filter column in the oil and gas well, facilitates the production, and the cleaned ultra-light particles can be reused, thereby greatly reducing the production cost.
  • the particle density in this patent refers to the true density of the particles.
  • This patent also includes the secondary injection of a finer downhole filter string into the original downhole filter string in a well where a downhole filter string is already present.

Description

便于将井下过滤器管柱拔出的
油气井结构及管柱拔出方法 技术领域
本发明涉及石油开采领域, 具体地说, 涉及一种便于将井下 过滤器管柱拔出的油气井结构及从该油气井中拔出井下过滤器管 柱的方法。 这里的油气井是指油气田开发中广义的生产井, 包括 油井、 气井、 天然气井、 注入井等。 背景技术
大部分机械防砂的油气井的完井结构包括油气井和下入油气 井内的井下过滤器管柱, 油气井包括直井、 斜井、 大斜度井和水 平井。 如图 1所示, 图 1中附图标记 1指示油气井井壁, 附图标 记 2指示井下过滤器管柱, 附图标记 3指示井下过滤器管柱与井 壁之间的环空, 附图标记 4指示悬挂井下过滤器管柱的封隔器。 这里的井下过滤器管柱是一种广义的井下过滤器管柱, 有多种形 式, 如: 第一种情况是无节流功能井下过滤器管柱, 这时无节流 功能井下过滤器管柱仅仅是一个防砂过滤器, 也称为防砂管, 筛 管。 第二种是具有控流功能的过滤器, 即控流过滤器管柱, 也称 为控流筛管。 控流过滤器, 具有控流功能, 同时具有过滤功能, 过滤功能有时是防止控流过滤器外面的防窜流颜粒介质进入井筒 中, 对出砂的井也有防止地层砂进入井筒中的作用。 控流过滤器 的控流功能同时有节流功能。
井下过滤器管柱是指有一个或一个以上的井下过滤器串接而 成的管柱。 如在水平井放入 300米总长度的防砂管, 是有 30根 10米左右的防砂管串接而成。
在下入井下过滤器管柱的油气井中, 井下过滤器管柱外面存 在两种情况, 一种情况是井下过滤器管柱外面人为充填有砾石, 砾石包括有石英砂或陶粒; 另一种情况是井下过滤器管柱外面没 有充填物, 如果井下过滤器管柱外面没有填充物, 出砂井在生产 一段时间后, 产出的地层砂也会填充满井下过滤器管柱和井壁之 间的环空, 如图 1所示, 图 1中 5为井下过滤器管柱外堆积的地 层砂或人工充填的砾石。 不管是自然充填的地层砂还是人工充填 的砾石都会对井下过滤器管柱上提产生很大的阻力, 使得油气井 内的井下过滤器管柱很难取出, 尤其是井下过滤器管柱长的井, 如大斜度井和水平井, 拔出井下过滤器管柱几乎是不可能的。
但是很多情况下需要将井下过滤器管柱拔出, 如下面几种情 况:
1、需要修理破损的井下过滤器管柱, 或者更换井下过滤器管 柱;
2、 需要将拔出的井下过滤器管柱再利用, 以节省大量开支;
3、 使用控流过滤器管柱时, 在生产过程中, 拔出控流过滤器 管柱, 可以方便地调整控流过滤器管柱的控流参数, 以适应不同 开发阶段的流量要求, 提高油气井生产效率。
现在还没有一种便于将井下过滤器管柱拔出的油气井结构及 特别行之有效的从油气井中拔出井下过滤器管柱的方法。 发明内容
本发明需要解决的技术问题就在于提供一种便于将井下过滤 器管柱拔出的油气井结构及从该油气井中拔出井下过滤器管柱的 方法。
为解决上述问题, 本发明采用如下技术方案:
本发明一种便于将井下过滤器管柱拔出的油气井结构, 包括 油气井井壁和下入油气井内的井下过滤器管柱, 所述井下过滤器 管柱靠近井口一端为过滤器管柱上端, 所述过滤器管柱上端和井 壁之间固定连接, 井下过滤器管柱与井壁之间形成一个环空; 所 述井下过滤器管柱与井壁之间的环空内填充满超轻颗粒, 其中, 该超轻颗粒的密度接近或等于超轻颗粒携带液的密度, 所述超轻 颗粒携带液为用于将超轻颗粒携带送入所述环空内或将超轻颗粒 反冲而带出所述环空的液体。
所述超轻颗粒与所述超轻颗粒携带液的密度差在从 -0.35 至 +0.35的范围内, 包含端点。
优选地, 所述超轻颗粒与所述超轻颗粒携带液的密度差在从 -0.3至 +0.3的范围内, 包含端点。
所述超轻颗粒为平均粒径为 0.05-1.2mm、 真实密度为 0.7-1.3g/cm3的颗粒。
优选地, 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度 为 0.94-1.08g/cm3的颗粒。
优选地, 所述超轻颗粒为高分子聚合物颗粒。
优选地, 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度 为 0.90-0.98g/cm3的高密度聚乙烯颗粒。
或者, 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度为 0.7-1.3g/cm3的聚丙烯和聚氯乙烯高分子聚合物颗粒。
或者, 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度为 0.94-1.08g/cm3的苯乙烯和二乙烯苯交联共聚物颗粒。
本发明同时公开了一种从所述的便于将井下过滤器管柱拔出 的油气井结构中提出井下过滤器管柱的方法, 所述方法包括下列 步骤:
1 )、建立通道: 打开井下过滤器管柱上端和井壁之间的环空;
2 )、 反沖携带液清空超轻颗粒: 向井下过滤器管柱内注入超 轻颗粒携带液, 用于从所述环空中将超轻颗粒反冲携带离开; 3 )、 拔出井下过滤器管柱。
当井下过滤器管柱为控流过滤器管柱时, 所述反冲携带液清 空超轻颗粒步驟为用注液管和井下过滤器管柱连接, 直接向控流 过滤器管柱内注入超轻颗粒携带液, 由于控流过滤器管柱的控流 作用, 注入液从控流过滤器管柱各段均勾地注入超轻颗粒中, 通 过井下过滤器管柱上部流体流通通道将井下过滤器管柱外堆积的 超轻颗粒清空。
当井下过滤器管柱为控流过滤器管柱时, 所述反冲携带液清 空超轻颗粒步驟为在井下过滤器管柱内下入注液管, 由注液管进 行注液; 所述注液管下部有一开口, 注液管开口的上部设置有一 个密封环,所述密封环的外径和井下过滤器管柱的内径基本相同, 注液方式为分段注液: 将注液管由井下过滤器管柱的顶部逐步深 入到井下过滤器管柱底部进行分段注液、 分段清空井下过滤器管 柱外的超轻颗粒, 当靠近井口的前一段井下过滤器管柱外的超轻 颗粒被清空后, 再将注液管深入井下过滤器管柱一段, 直至井下 过滤器管柱外被完全清空; 或者可以连续移动注液管进行注液直 至清空井下过滤器管柱外的超轻颗粒。
当井下过滤器管柱为无节流功能的井下过滤器管柱时, 所述 反沖携带液清空超轻颗粒步骤为在井下过滤器管柱内下入注液 管, 由注液管进行注液; 所述注液管下部有一开口, 注液管开口 的上部设置有一个密封环, 所述密封环的外径和井下过滤器管柱 的内径基本相同, 注液方式为分段注液: 将注液管由井下过滤器 管柱的顶部逐步深入到井下过滤器管柱底部进行分段注液、 分段 清空井下过滤器管柱外的超轻颗粒, 当靠近井口的前一段井下过 滤器管柱外的超轻颗粒被清空后, 再将注液管深入井下过滤器管 柱一段, 直至井下过滤器管柱外被完全清空。 注液管的移动方式 可以为连续移动注液管进行注液直至清空井下过滤器管柱外的超 轻颗粒。
优选的, 本发明所述超轻颗粒携带液为水或水溶液。
本发明利用密度为 1 g/cm3左右的超轻颗粒携带液,选择真实 密度和携带液的密度非常接近的超轻颗粒, 这样携带液就可以很 容易地携带超轻颗粒填充到井下过滤器管柱和井壁之间的环空 内, 填充并充满井下过滤器管柱和井壁之间的环空, 一部分携带 液进入井下过滤器管柱并返回地面, 还有一部分携带液通过井壁 渗入地层; 最终形成在井下过滤器管柱和井壁之间的环空内填充 满超轻颗粒的完井结构。
同时, 超轻颗粒占据了井下过滤器管柱和井壁之间的环空的 空间, 也阻挡了地层砂在井下过滤器管柱和井壁之间的环空的空 间内的堆积。
本发明选择平均粒径为 0.05-1.2mm、真实密度为 0.7-l,3g/cm3 的颗粒作为超轻颗粒填充于井下过滤器管柱和井壁之间的环空 内, 当需要提出井下过滤器管柱时, 可以容易地清空井下过滤器 管柱外堆积的超轻颗粒, 由于超轻颗粒的密度和携带液的密度非 常接近, 因而低速循环的携带液就可以很方便地将超轻颗粒带到 地面, 清空井下过滤器管柱外的环空, 使井下过滤器管柱可以方 便地从油井中提取出来。 满足提出井下过滤器管柱的要求。
本发明所述方法简便可行, 克服了油井中的井下过滤器管柱 难以提取出来的困难, 方便了生产, 而且清理出来的超轻颗粒还 可以再次利用, 大大降低了生产成本。 附图说明
图 1为背景技术所述完井结构示意图。
图 2为本发明实施例 1所述完井结构示意图。
图 3为本发明实施例 2所述的反冲清空过滤器管柱外的超轻 颗粒的携粒液流动路径示意图。
图 4为本发明实施例 3所述的反沖清空过滤器管柱外的超轻 颗粒的携粒液流动路径示意图。
图 5为本发明实施例 4所述的反冲清空过滤器管柱外的超轻 颗粒的携粒液流动路径示意图。
图 6为本发明所述清空超轻颗粒后的油气井结构示意图。 具体实施方式
实施例 1
如图 2所示, 本发明一种便于将井下过滤器管柱拔出的油气 井结构, 包括油气井井壁 1和下入油气井内的井下过滤器管柱 2, 所述井下过滤器管柱靠近井口一端和井壁之间设置有悬挂井下过 滤器管柱的封隔器 4, 井下过滤器管柱与井壁之间形成一个环空; 所述井下过滤器管柱与井壁之间的环空内填充有超轻颗粒 6。
实施例 1 控流过滤器管柱提取方法
如图 2所示、 如实施例 1所述的完井结构, 其中所述超轻颗 粒为平均粒径为 0.05-0.8mm、 真实密度为 0.7-1.3g/cm3的聚丙烯 和聚氯乙烯高分子聚合物颗粒。
如图 3所示, 所述井下过滤器管柱为控流过滤器管柱 2, 井 下过滤器管柱上设置有控流过滤器 2-1; 井下过滤器管柱的提起 方法为:
1 )、 打开悬挂井下过滤器管柱的封隔器。 对于可上提解封的 封隔器, 打开方法是上提封隔器, 封隔器自动解封。 对于可转动 解封的封隔器, 转动封隔器, 封隔器自动解封。 解封后封隔器和 井壁之间存在间隙, 间隙成为流体流通通道。
2 )、 反沖携带液清空超轻颗粒: 用注入管柱与井下过滤器管 柱连接直接向控流过滤器管柱内注入携带液, 由于控流过滤器管 柱的控流作用, 携带液从井下过滤器管柱各段通过控流过滤器均 匀地注入超轻颗粒中; 图 3中箭头方向为携带液流动方法。
3 )、 清空: 由携带液将超轻颗粒带出井外, 直至清空井下过 滤器管柱外堆积的超轻颗粒; 清空后油气井的结构如图 6所示。
4 )、 拔出井下过滤器管柱。
实施例 3 控流过滤器管柱提取方法
如图 2所示、 如实施例 1所述的完井结构, 其中所述超轻颗 粒为平均粒径为 0.05-0.8mm、 真实密度为 0.94-1.08g/cm3的苯乙 烯和二乙烯苯交联共聚物颗粒。
如图 4所示, 所述井下过滤器管柱为控流过滤器管柱 2, 井 下过滤器管柱上设置有控流过滤器 2-1; 井下过滤器管柱的提起 方法为:
1 )、 打开悬挂井下过滤器管柱的封隔器。 对于可上提解封的 封隔器, 打开方法是上提封隔器, 封隔器自动解封。 对于可转动 解封的封隔器, 转动封隔器, 封隔器自动解封。 解封后封隔器和 井壁之间存在间隙, 间隙成为流体流通通道
2 )、 反冲携带液清空超轻颗粒: 在井下过滤器管柱内下入注 液管 7, 由注液管进行注液; 所述注液管底部有一开口, 开口上 部设置有一个密封坏 8, 所述密封环的外径和井下过滤器管柱的 内径基本相同, 注液方式为分段注液: 将注液管由井下过滤器管 柱的顶部逐步深入到井下过滤器管柱底部进行分段注液、 分段清 空井下过滤器管柱外的超轻颗粒, 由于密封环的作用, 密封环可 以将注液管注入井下过滤器管柱内的携带液挡在密封环的下侧, 集中携带液冲击沉积有超轻颗粒的部位, 当靠近井口的上一段井 下过滤器管柱外的超轻颗粒被清空后, 再将注液管深入井下过滤 器管柱往下一段,直至井下过滤器管柱外的超轻颗粒被完全清空; 这样也避免了携带液的对启动沉积的超轻颗粒没有发挥作用, 节 约了大量的携带液。 图 4中箭头方向为携带液流动方向。 图 4中 虚线表示注液管逐步深入井下过滤器管柱内分段注液。 注液管深 入井下过滤器管柱的方式可以为连续勾速深入方式。 连续匀速移 动的注液管不断注液, 超轻颗粒被清空后深度不断增加, 直至井 下过滤器管柱外的超轻颗粒被完全清空。 图 4中箭头方向为携带 液流动方法
3 )、 清空: 由携带液将超轻颗粒带出井外, 直至清空井下过 滤器管柱外堆积的超轻颗粒; 清空后油气井的结构如图 6所示。
4 )、 拔出井下过滤器管柱。
实施例 4 无节流功能的井下过滤器管柱提取方法
如图 2所示、 如实施例 1所述的完井结构, 其中所述超轻颗 粒为平均粒径为 0.1-0.5mm、真实密度为 0.94g/cm3高密度聚乙烯 颗粒。
如图 5所示, 所述井下过滤器管柱为无节流功能的井下过滤 器管柱 2 , 井下过滤器管柱的提起方法为:
1 )、 打开井下过滤器管柱靠近井口一端和井壁之间的环空、 在井下过滤器管柱靠近井口一端和井壁之间的环空的上部建立一 个流体流通通道; 对于可上提解封的封隔器, 打开方法是上提封 隔器, 封隔器自动解封。 对于可转动解封的封隔器, 转动封隔器, 封隔器自动解封。 解封后封隔器和井壁之间存在间隙, 间隙成为 流体流通通道。
2 )、 反冲携带液清空超轻颗粒: 在井下过滤器管柱内下入注 液管 7, 由注液管进行注液; 所述注液管顶端设置有密封环 8, 所 述密封环的外径和井下过滤器管柱的内径基本相同, 注液管的密 封环稍微低一点处为注入管的出液口 9, 注液方式为分段注液: 将注液管由井下过滤器管柱的顶部逐步深入到井下过滤器管柱底 部进行分段注液、 分段清空井下过滤器管柱外的超轻颗粒, 由于 密封环的作用, 密封环可以将注液管注入井下过滤器管柱内的携 带液挡在井下过滤器管柱内的密封环的下侧, 携带液再难以进入 密封环的上侧, 这样, 上侧方清空的地方, 就不会再有携带液从 过滤器管柱进入, 集中携带液清空需要清空的超轻颗粒, 当靠近 井口的上一段井下过滤器管柱外的超轻颗粒被清空后, 再将注液 管深入井下过滤器管柱一段,直至井下过滤器管柱外被完全清空; 这样也避免了携带液的跑空, 节约了大量的携带液, 保持较高的 冲超轻颗粒的流速。 图 5中箭头方向为携带液流动方向。 图中虚 线表示注液管逐步深入井下过滤器管柱内注液。 注液管深入井下 过滤器管柱的方式可以为间歇深入方式。 间歇移动的注液管不断 注液, 直至井下过滤器管柱外的超轻颗粒被完全清空。
3 )、 清空: 由携带液将超轻颗粒带出井外, 直至清空井下过 滤器管柱外堆积的超轻颗粒; 清空后油气井的结构如图 6所示。
4 )、 拔出井下过滤器管柱。
实施例 2-4所述的携带液可以为水或在水中添加油田常用添 加剂的水溶液。
本发明所述方法简便可行, 克服了油气井中的井下过滤器管 柱难以提取出来的困难, 方便了生产, 而且清理出来的超轻颗粒 还可以再次利用, 大大降低了生产成本。
本专利中颗粒密度指的是颗粒真实密度。
本专利也包括在已存在井下过滤器管柱的井中二次下入更细 井下过滤器管柱于原井下过滤器管柱之中的情况。 包括在套管射 孔井中、 下多孔管的井中, 棵眼井中下过滤器管柱的情况。
最后应说明的是: 显然, 上述实施例仅仅是为清楚地说明本 发明所作的举例, 而并非对实施方式的限定。 对于所属领域的普 通技术人员来说, 在上述说明的基础上还可以做出其它不同形式 的变化或变动。 这里无需也无法对所有的实施方式予以穷举。 而 由此所引伸出的显而易见的变化或变动仍处于本发明的保护范围 之中。

Claims

1. 一种便于将井下过滤器管柱拔出的油气井结构, 包括油 气井井壁和下入油气井内的井下过滤器管柱, 所述井下过滤器管 柱靠近井口一端为过滤器管柱上端, 所述过滤器管柱上端和井壁 之间固定连接, 井下过滤器管柱与井壁之间形成一个环空; 其特 征在于: 所述井下过滤器管柱与井壁之间的环空内填充满超轻颗 粒, 所述超轻颗粒的密度接近或等于超轻颗粒携带液的密度, 所 述超轻颗粒携带液为用于将超轻颗粒携带送入所述环空内或将超 轻颗粒反沖而带出所述环空的液体。
2. 如权利要求 1 所述的便于将井下过滤器管柱拔出的油气 井结构, 所述超轻颗粒为平均粒径为 0.05-1.2mm、 真实密度为 0.7-1.3 g/cm3的颗粒。
3. 如权利要求 2 所述的便于将井下过滤器管柱拔出的油气 井结构, 其特征在于: 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度为 0.94-1.08g/cm3的颗粒。
4. 如权利要求 2或 3所述的便于将井下过滤器管柱拔出的 油气井结构, 其特征在于: 所述超轻颗粒为高分子聚合物颗粒。
5. 如权利要求 2 所述的便于将井下过滤器管柱拔出的油气 井结构, 其特征在于: 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度为 0.90-0.98g/cm3的高密度聚乙烯颗粒。
6. 如权利要求 2 所述的便于将井下过滤器管柱拔出的油气 井结构, 其特征在于: 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度为 0.7-1.3g/cm3的聚丙烯和聚氯乙烯高分子聚合物颗粒。
7. 如权利要求 4 所述的便于将井下过滤器管柱拔出的油气 井结构, 其特征在于: 所述超轻颗粒为平均粒径为 0.05-0.8mm、 真实密度为 0.94-1.08g/cm3的苯乙烯和二乙浠苯交联共聚物颗粒。
8. 如权利要求 1 所述的便于将井下过滤器管柱拔出的油气 井结构, 其特征在于: 所述超轻颗粒与所述超轻颗粒携带液的密 度差在从 -0.35至 +0.35的范围内, 包含端点。
9. 如权利要求 8 所述的便于将井下过滤器管柱拔出的油气 井结构, 其特征在于: 所述超轻颗粒与所述超轻颗粒携带液的密 度差在从 -0.3至 +0.3的范围内, 包含端点。
10. 一种从权利要求 1-9之任一所述的便于将井下过滤器管 柱拔出的油气井结构中提出井下过滤器管柱的方法,其特征在于: 所述方法包括下列步骤:
1 )、建立通道: 打开井下过滤器管柱上端和井壁之间的环空;
2 )、 反冲携带液清空超轻颗粒: 向井下过滤器管柱内注入超 轻颗粒携带液, 用于从所述环空中将超轻颗粒反沖携带离开;
3 )、 拔出井下过滤器管柱。
11. 如权利要求 10所述的从便于将井下过滤器管柱拔出的油 气井结构中提出井下过滤器管柱的方法, 其特征在于: 所述井下 过滤器管柱为控流过滤器管柱, 所述反冲携带液清空超轻颗粒步 骤为用注液管和井下过滤器管柱连接, 直接向控流过滤器管柱内 注入超轻颗粒携带液。
12. 如权利要求 10 所述的从便于将井下过滤器管柱拔出的 油气井结构中提出井下过滤器管柱的方法, 其特征在于: 所述反 冲携带液清空超轻颗粒步骤为在井下过滤器管柱内下入注液管, 由注液管进行注液; 所述注液管下部有一开口, 注液管开口的上 部设置有一个密封环, 所述密封环的外径和井下过滤器管柱的内 径基本相同, 注液方式为分段注液。
13. 如权利要求 10-12之任一所述的从便于将井下过滤器管 柱拔出的油气井结构中提出井下过滤器管柱的方法,其特征在于: 所述超轻颗粒携带液为水或水溶液。
PCT/CN2010/002015 2009-12-11 2010-12-10 便于将井下过滤器管柱拔出的油气井结构及管柱拔出方法 WO2011069340A1 (zh)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101705808B (zh) * 2009-12-11 2012-05-30 安东石油技术(集团)有限公司 套管外存在窜槽的油气井的控流过滤器管柱分段控流方法
CN101705802B (zh) 2009-12-11 2013-05-15 安东石油技术(集团)有限公司 一种油气井生产段防窜流封隔颗粒
CN101701517B (zh) * 2009-12-11 2012-09-05 安东石油技术(集团)有限公司 一种从便于将井下过滤器管柱拔出的油气井中提出井下过滤器管柱的方法
US9482070B2 (en) * 2012-05-08 2016-11-01 Shell Oil Company Method and system for sealing an annulus enclosing a tubular element
CN108798548B (zh) * 2017-05-01 2024-01-23 刘向京 一种油气井环空控流短节及其应用方法
CN112267855B (zh) * 2020-09-22 2023-02-07 中国石油天然气股份有限公司 调流控水防砂完井管柱和充砂方法
CN113266304B (zh) * 2021-07-01 2022-06-07 中国石油大学(华东) 一种提升油气井长效生产寿命的穿越型水合物层固井方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269840A (en) * 1992-08-19 1994-02-23 Solinst Canada Ltd Injecting particulate material into boreholes
US5623993A (en) * 1992-08-07 1997-04-29 Baker Hughes Incorporated Method and apparatus for sealing and transfering force in a wellbore
CN1906376A (zh) * 2003-12-11 2007-01-31 国际壳牌研究有限公司 在地下井筒中产生区域隔离的方法
CN1918361A (zh) * 2004-02-12 2007-02-21 国际壳牌研究有限公司 抑制到或从井筒的流体连通
CN101701517A (zh) * 2009-12-11 2010-05-05 安东石油技术(集团)有限公司 便于将井下过滤器管柱拔出的油气井结构及管柱拔出方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1379815A (en) * 1920-07-30 1921-05-31 Hall James Robert Oil-well screen and liner cleaner
US2018283A (en) * 1933-12-09 1935-10-22 Schweitzer Method and means for well development
US3460616A (en) * 1967-07-26 1969-08-12 Dresser Ind Retrievable packer
US4733729A (en) * 1986-09-08 1988-03-29 Dowell Schlumberger Incorporated Matched particle/liquid density well packing technique
US4793411A (en) * 1988-06-29 1988-12-27 Halliburton Company Retrievable gravel packer and retrieving tool
US5404951A (en) * 1993-07-07 1995-04-11 Atlantic Richfield Company Well treatment with artificial matrix and gel composition
US5913365A (en) * 1997-04-08 1999-06-22 Mobil Oil Corporation Method for removing a gravel pack screen
EP0909875A3 (en) * 1997-10-16 1999-10-27 Halliburton Energy Services, Inc. Method of completing well in unconsolidated subterranean zone
US7845409B2 (en) * 2005-12-28 2010-12-07 3M Innovative Properties Company Low density proppant particles and use thereof
US7624802B2 (en) * 2007-03-22 2009-12-01 Hexion Specialty Chemicals, Inc. Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5623993A (en) * 1992-08-07 1997-04-29 Baker Hughes Incorporated Method and apparatus for sealing and transfering force in a wellbore
GB2269840A (en) * 1992-08-19 1994-02-23 Solinst Canada Ltd Injecting particulate material into boreholes
CN1906376A (zh) * 2003-12-11 2007-01-31 国际壳牌研究有限公司 在地下井筒中产生区域隔离的方法
CN1918361A (zh) * 2004-02-12 2007-02-21 国际壳牌研究有限公司 抑制到或从井筒的流体连通
CN101701517A (zh) * 2009-12-11 2010-05-05 安东石油技术(集团)有限公司 便于将井下过滤器管柱拔出的油气井结构及管柱拔出方法

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CN101701517B (zh) 2012-09-05
NO20120798A1 (no) 2012-09-10
CN101701517A (zh) 2010-05-05
US20120279716A1 (en) 2012-11-08
GB2489161A (en) 2012-09-19
CA2783392A1 (en) 2011-06-16
GB2489161B (en) 2015-05-13
NO346845B1 (no) 2023-01-30

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