WO2014187023A1 - 柴油型复合热载体发生*** - Google Patents

柴油型复合热载体发生*** Download PDF

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Publication number
WO2014187023A1
WO2014187023A1 PCT/CN2013/079036 CN2013079036W WO2014187023A1 WO 2014187023 A1 WO2014187023 A1 WO 2014187023A1 CN 2013079036 W CN2013079036 W CN 2013079036W WO 2014187023 A1 WO2014187023 A1 WO 2014187023A1
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WIPO (PCT)
Prior art keywords
diesel
heat carrier
composite heat
pipeline
water
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Application number
PCT/CN2013/079036
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English (en)
French (fr)
Inventor
梅立新
梅奕中
李兴儒
张建忠
李伟成
崔国安
顾世峰
Original Assignee
江苏大江石油科技有限公司
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Application filed by 江苏大江石油科技有限公司 filed Critical 江苏大江石油科技有限公司
Publication of WO2014187023A1 publication Critical patent/WO2014187023A1/zh

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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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection

Definitions

  • the invention relates to a diesel type composite heat carrier generating system, and belongs to the technical field of oil recovery technology. Background technique
  • the composite heat carrier generated by the high temperature and high pressure composite heat carrier generator through closed combustion contains high temperature nitrogen, carbon dioxide and water vapor, and carries combustion heat.
  • the composite heat carrier is injected into the oil layer through the injection line, which can comprehensively improve oil recovery and single well productivity.
  • the composite heat carrier needs to adjust the temperature, flow rate and total amount according to the injection parameters to achieve higher recovery and single well productivity.
  • reliable control of temperature, pressure and flow of composite heat carrier has become a reliable technology for effectively supplementing formation energy in low permeability oilfields.
  • the composite heat carrier technology is not only suitable for heavy oil thermal recovery, but also suitable for re-production of uranium mines, so it is of great value. Summary of the invention
  • the object of the present invention is to overcome the above-mentioned deficiencies and provide a diesel-type composite heat carrier generating system, which utilizes diesel fuel as a fuel to effectively reduce the operation in a qualified mining area on the basis of comprehensively improving oil recovery and single well productivity. Cost, reduce carbon emissions.
  • the diesel-type composite heat carrier generating system proposed by the invention comprises a composite heat carrier generator, an air pipeline, a diesel pipeline and a softened water pipeline, and the input ends of the composite heat carrier generator are respectively connected with the air pipeline and the diesel pipeline and The softened water lines are connected.
  • the air line is provided with a first air regulating valve, a second air regulating valve, an air mass flow meter, an air pressure transmitter and an air check valve in this order.
  • the diesel pipeline is provided with a diesel regulating valve, a variable frequency high pressure oil pump, a first diesel pressure transmitter, a diesel filter, and a diesel Oil mass flow meter, second diesel pressure transmitter and diesel check valve.
  • a diesel motor is connected to the diesel variable frequency high pressure oil pump.
  • the softened water pipe is provided with a softening water regulating valve, a variable frequency high pressure water pump, a first water pressure transmitter, a water filter, a water mass flow meter, a second water pressure transmitter and a water check valve.
  • the pump motor is connected to the variable frequency high pressure water pump.
  • the output of the composite heat carrier generator is connected to the oil layer by a composite heat carrier transfer line.
  • the composite heat carrier transfer line includes a heat carrier pressure transmitter, an output temperature transmitter, an output safety valve, a second nozzle, an output check valve, and an output shutoff valve that are sequentially connected through the pipeline.
  • a composite water carrier generator is provided with a cooling water temperature transmitter.
  • the output of the composite heat carrier generator is also connected to a waste liquid recovery line.
  • the waste liquid recovery line includes an electric vent valve and a first nozzle connected to each other through a pipe, and the first nozzle connection is disposed between the output safety valve and the second nozzle.
  • the diesel-type composite heat carrier generating system of the present invention utilizes diesel as a fuel, comprehensively improves oil recovery and single well productivity through diesel-type composite heat carrier, and reduces carbon emissions.
  • FIG. 1 is a schematic view of a diesel-type composite heat carrier generating system according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the principle of a diesel flow regulating system according to an embodiment of the present invention.
  • Fig. 3 is a schematic view showing the principle of a temperature adjustment system according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the principle of a safety control system according to an embodiment of the present invention. among them:
  • a diesel-type composite heat carrier generating system includes a composite heat carrier generator 10, an air line 20, a diesel line 30, and a softened water line 40.
  • the input of the composite heat carrier generator 10 is connected to an air line 20, a diesel line 30 and a demineralized water line 40, respectively.
  • the air line 20 is provided with a first air regulating valve 21, a second air regulating valve 22, an air mass flow meter 23, an air pressure transmitter 24, and an air check valve 25 in this order.
  • the air pressure transmitter 24 has an air pressure transmitter switch 24a.
  • the diesel pipeline 30 is sequentially provided with a diesel regulating valve 31, a variable frequency high pressure oil pump 32, a first diesel pressure transmitter 33, a diesel filter 34, a diesel mass flow meter 35, a second diesel pressure transmitter 36 and a diesel check. Valve 37.
  • a diesel motor 32a is connected to the diesel variable frequency high pressure oil pump 32.
  • a first diesel pressure transmitter switch 33a is provided on the first diesel pressure transmitter 33.
  • a second diesel pressure transmitter switch 36a is provided on the second diesel pressure transmitter 36.
  • the softened water line 40 is sequentially provided with a softened water regulating valve 41, a variable frequency high pressure water pump 42, a first water pressure transmitter 43, a water filter 44, a water mass flow meter 45, a second water pressure transmitter 46, and a water stop. Return valve 47.
  • a pump motor 42a is connected to the variable frequency high pressure water pump 42.
  • the first water pressure transmitter 43 is provided with a first water pressure transmitter switch 43a.
  • a second water pressure transmitter switch 46a is provided on the second water pressure transmitter 46.
  • the output of the composite heat carrier generator 10 is coupled to the oil layer by a composite heat carrier transfer line.
  • the composite heat carrier transfer line includes a heat carrier pressure transmitter 12, an output temperature transmitter 13, an output safety valve 14, a second nozzle 17, an output check valve 18, and an output shutoff valve 19 that are sequentially connected by a line.
  • the composite heat carrier generator 10 is provided with a cooling water temperature transmitter 1 1 .
  • the heat carrier pressure transmitter 12 is provided with a heat carrier pressure transmitter switch 12a.
  • the waste heat recovery line is also connected to the output of the composite heat carrier generator 10.
  • the waste liquid recovery line includes an electric vent valve 15 and a first nozzle connected to each other through a pipeline 16. The first nozzle 16 is connected between the output safety valve 14 and the second nozzle 17 .
  • the input air is controlled by the second air regulating valve 22 and the air mass flow meter 23, and the fuel quality is adjusted by the variable frequency high pressure oil pump 32 and the diesel mass flow meter 35, and the variable frequency high pressure water pump 42 is adopted.
  • the water mass flow meter 45 controls the softened water quality, monitors the measured output heat carrier temperature through the output temperature transmitter 13, realizes the high temperature and high pressure fuel composite heat carrier temperature regulation, and the high temperature and high pressure composite heat carrier flow control.
  • the high-temperature and high-pressure composite heat carrier generated by the composite heat carrier generator 10 contains carbon dioxide, nitrogen and water vapor, and controls the temperature of the output heat carrier through the miscible vaporized water, and efficiently utilizes nitrogen, carbon dioxide and combustion heat to improve oil recovery and single well. New technology for thermal recovery technology of production capacity.
  • the high-temperature and high-pressure composite heat carrier generated by the composite heat carrier generator 10 contains carbon dioxide, nitrogen and water vapor, and controls the temperature of the output heat carrier through the miscible vaporized water, so as to ensure the injection safety is strictly controlled according to a certain residual oxygen coefficient of 1.00 ⁇ 1.05.
  • the oxygen content of the output heat carrier is far below the safety requirement of 5%, and the final output heat carrier is injected into the ground pipeline through the output tree through the output shut-off valve 19 according to the geological process requirements of the injected oil layer, under a certain temperature and pressure.
  • the flow oil layer meets the requirements of oil production and oil increase process, and improves single well productivity and recovery.
  • the injection flow rate is adjusted according to the amount of air in the high temperature and high pressure composite heat carrier injection process, and the diesel fuel flow is automatically adjusted after the given amount of air to make the heat carrier high temperature and high pressure closed combustion fully and completely, and output carbon dioxide, nitrogen and water.
  • the diesel can be in accordance with a given ratio under high pressure conditions, and the corresponding amount of air is input into the diesel to ensure accurate combustion; the precise flow adjustment and system compensation cycle control of the diesel automatic flow automatic adjustment system
  • the diesel can not only smoothly ignite at low flow and high pressure, but also realize high-pressure and large-flow precise control for continuous stable and safe combustion.
  • the high-pressure softened water flow control system not only ensures the safe operation of the diesel composite heat carrier generator, but also ensures that the output heat carrier temperature can be Process requirements are controlled.
  • FIG. 2 is a schematic diagram of the principle of a diesel flow regulating system according to an embodiment of the present invention.
  • a diesel-type composite heat carrier generating system according to an embodiment of the present invention, through a diesel regulating valve 31 and a variable-frequency high-pressure oil pump 32, instantaneously cuts off diesel supply during shutdown, and adopts a frequency conversion high-pressure oil pump 32 and a PLC (programmable controller) program. Adjusting the diesel flow rate satisfies the ignition, running temperature requirements and high pressure combustion flow control stability requirements of the composite heat carrier generator.
  • the diesel check valve 37 can prevent the safety of the composite heat carrier from flowing back when the pressure in the combustion chamber is too high.
  • FIG. 3 is a schematic diagram of the principle of a temperature adjustment system according to an embodiment of the present invention.
  • the present invention The diesel-type composite heat carrier generating system of the embodiment controls the water flow by the frequency conversion high-pressure water pump 42 frequency conversion, and realizes that the output heat carrier temperature satisfies the process requirement, and at the same time, the water flow control system ensures that the cooling water temperature satisfies the safe operation of the equipment, and ensures the diesel composite heat carrier.
  • the generator core security is controlled.
  • a diesel-type composite heat carrier generating system detects air pressure by an air pressure transmitter 24, and the air check valve 25 prevents the composite heat carrier from reversing the original pipe damage, and the air mass flow meter 23 Metering the injected air flow, pressure and flow rate in real time; through the diesel mass flow meter 35 of the diesel pipeline 30, the diesel check valve 37, the diesel pressure transmitters 33 and 36 to achieve flow control and safety protection of the fuel supply system;
  • the water mass flow meter 45 of the road 40, the water check valve 47, the water filter 44, the water pressure transmitters 43 and 46 realize the water supply system guarantee and safety protection; the output temperature transmitter 13 through the output line, the output safety The valve 14, the electric venting valve 15, the output check valve 18 and the output shut-off valve 19 realize the injection process non-return, over-temperature, over-pressure alarm parking and emptying and pressure relief, forming a high-temperature

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
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  • Geochemistry & Mineralogy (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

本发明涉及一种柴油型复合热载体发生***，包括复合热载体发生器、空气管路、柴油管路和软化水管路。复合热载体发生器的输入端分别与空气管路、柴油管路和软化水管路相连接，复合热载体发生器的输出端通过复合热载体输送管线与油层相连接。复合热载体输送管线包括通过管路依次连接的热载体压力变送器、输出温度变送器、输出安全阀、第二喷嘴、输出止回阀和输出截止阀。本发明的柴油型复合热载体发生***，利用柴油作为燃料，通过柴油型复合热载体综合提高原油采收率和单井产能，并降低了碳排放。

Description

柴油型复合热载体发牛*** 技术领域
本发明涉及一种柴油型复合热载体发生***， 属于采油工艺技术领域。 背景技术
向油层注入饱和水蒸汽进行稠油热采是世界各国普遍采用的方法之一。 目 前， 分别向油层注入二氧化碳、 氮气也成为世界各国开展原油增产和提高采收 率技术的新突破， 并都已取得一定的采油效果和经济效益。
高温高压复合热载体发生器通过密闭燃烧所生成的复合热载体含有高温 的氮气、 二氧化碳及水蒸气， 并携带燃烧热量。 复合热载体通过注热管线全部 注入油层， 可以综合提高原油采收率和单井产能。 在注入时， 复合热载体需要 按照注入参数的要求来调节温度、 流量及总量， 以达到较高的采收率和单井产 能。 同时复合热载体温度、 压力、 流量的可靠控制也成为低渗透油田有效补充 地层能量的可靠技术。
由于复合热载体中， 二氧化碳对原油具有溶解作用， 氮气对原油具有弹性 驱动作用，水蒸汽对原油具有热力作用，在现有基础上，可提高原油采收率 10% 以上。 复合热载体技术不仅适用于稠油热采， 同时也适用于已采铀矿的再次采 油， 因此具有十分重大的价值。 发明内容
本发明的目的在于克服上述不足， 提供一种柴油型复合热载体发生***， 它利用柴油作为燃料， 在综合提高原油采收率和单井产能的基础上， 在有条件 的矿区能够有效降低运行成本， 降低碳排放。
本发明所提出的柴油型复合热载体发生***， 包括复合热载体发生器、 空 气管路、柴油管路和软化水管路，复合热载体发生器的输入端分别与空气管路、 柴油管路和软化水管路相连接。 空气管路上依次设置有第一空气调节阀、 第二 空气调节阀、 空气质量流量计、 空气压力变送器和空气止回阀。 柴油管路上依 次设置有柴油调节阀、 变频高压油泵、 第一柴油压力变送器、 柴油过滤器、 柴 油质量流量计、 第二柴油压力变送器和柴油止回阀。 柴油变频高压油泵上连接 设置有柴油电机。 软化水管路上依次设置有软化水调节阀、 变频高压水泵、 第 一水压力变送器、 水过滤器、 水质量流量计、 第二水压力变送器和水止回阀。 变频高压水泵上连接设置有水泵电机。 复合热载体发生器的输出端通过复合热 载体输送管线与油层相连接。 复合热载体输送管线包括通过管路依次连接的热 载体压力变送器、 输出温度变送器、 输出安全阀、 第二喷嘴、 输出止回阀和输 出截止阀。
根据本发明的一个方面， 复合热载体发生器上设置有冷却水温度变送器。 根据本发明的一个方面， 复合热载体发生器的输出端还连接有废液回收管 路。 废液回收管路包括通过管路相互连接的电动排空阀和第一喷嘴， 所述第一 喷嘴连接设置于所述输出安全阀与第二喷嘴之间。
与现有技术相比， 本发明的柴油型复合热载体发生***， 利用柴油作为燃 料，通过柴油型复合热载体综合提高原油采收率和单井产能，并降低了碳排放。 附图概述
本发明的特征 性能由以下的实施例及其附图进一步描述。
图 1为本发明 实施例的柴油型复合热载体发生***的示意图
图 2为本发明 实施例的柴油流量调节***原理示意图。
图 3为本发明 实施例的温度调节***原理示意图。
图 4为本发明 实施例的安全控制***原理示意图。 其中:
10 复合热载体发生器
1 1 冷却水温度变送器
12 热载体压力变送器
12a 热载体压力变送器开关
13 输出温度变送器
14 输出安全阀
15 电动排空阀 16 第一喷嘴
17 第二喷嘴
18 输出止回阀
19 输出截止阀
20 空气管路
21 第一空气调节阀
22 第二空气调节阀
23 空气质量流量计
24 空气压力变送器开关
25 空气压力变送器
26 空气止回阀
30 柴油管路
31 柴油调节阀
32 变频高压油泵
32a 柴油电机
33 第一柴油压力变送器
33a 第一柴油压力变送器开关
34 柴油过滤器
35 柴油质量流量计
36 第二柴油压力变送器
36a 第二柴油压力变送器开关
37 柴油止回阀
40 软化水管路
41 软化水调节阀
42 变频高压水泵
42a 水泵电机
43 第一软化水压力变送器
43a 第一水压力变送器开关 44 水过滤器
45 水质量流量计
46 第二水压力变送器
46a 第二水压力变送器开关
47 水止回阀
具体实施方式
参见图 1， 本发明一实施例的柴油型复合热载体发生***， 包括复合热载 体发生器 10、 空气管路 20、 柴油管路 30和软化水管路 40。 复合热载体发生器 10的输入端分别与空气管路 20、 柴油管路 30和软化水管路 40相连接。
空气管路 20上依次设置有第一空气调节阀 21、 第二空气调节阀 22、 空气 质量流量计 23、 空气压力变送器 24和空气止回阀 25。 空气压力变送器 24具 有空气压力变送器开关 24a。
柴油管路 30上依次设置有柴油调节阀 31、 变频高压油泵 32、 第一柴油压 力变送器 33、 柴油过滤器 34、 柴油质量流量计 35、 第二柴油压力变送器 36和 柴油止回阀 37。柴油变频高压油泵 32上连接设置有柴油电机 32a。第一柴油压 力变送器 33上设有第一柴油压力变送器开关 33a。 第二柴油压力变送器 36上 设有第二柴油压力变送器开关 36a。
软化水管路 40上依次设置有软化水调节阀 41、 变频高压水泵 42、 第一水 压力变送器 43、 水过滤器 44、 水质量流量计 45、 第二水压力变送器 46和水止 回阀 47。 变频高压水泵 42上连接设置有水泵电机 42a。 第一水压力变送器 43 上设有第一水压力变送器开关 43a。第二水压力变送器 46上设有第二水压力变 送器开关 46a。
复合热载体发生器 10的输出端通过复合热载体输送管线与油层相连接。 复合热载体输送管线包括通过管路依次连接的热载体压力变送器 12、输出温度 变送器 13、 输出安全阀 14、 第二喷嘴 17、 输出止回阀 18和输出截止阀 19。 复合热载体发生器 10上设置有冷却水温度变送器 1 1。热载体压力变送器 12上 设有热载体压力变送器开关 12a。复合热载体发生器 10的输出端还连接有废液 回收管路。 废液回收管路包括通过管路相互连接的电动排空阀 15和第一喷嘴 16。 第一喷嘴 16连接设置于输出安全阀 14与第二喷嘴 17之间。
本实施例的柴油型复合热载体发生***， 通过第二空气调节阀 22和空气 质量流量计 23控制输入空气， 通过变频高压油泵 32、 柴油质量流量计 35调节 燃油质量， 通过变频高压水泵 42、 水质量流量计 45控制软化水质量， 通过输 出温度变送器 13监控实测输出热载体温度、 实现高温高压燃油复合热载体温 度调节、 高温高压复合热载体流量控制。 复合热载体发生器 10生成的高温高 压复合热载体含二氧化碳、 氮气及水蒸气， 并通过惨混汽化水控制输出热载体 温度， 高效综合利用氮气、 二氧化碳及燃烧热量提高原油采收率和单井产能的 热采技术新工艺。 复合热载体发生器 10生成的高温高压复合热载体含二氧化 碳、 氮气及水蒸气， 并通过惨混汽化水控制输出热载体温度， 为确保注入安全 严格按照一定的余氧系数 1.00〜1.05范围内控制燃烧， 使输出热载体的氧含量 远低于 5%的安全要求， 最终输出热载体按照注入油层的地质工艺要求， 在一 定的温度和压力下， 通过输出截止阀 19连接地面管线经采油树注入流量油层 以满足油藏增产增油工艺要求， 提高单井产能和采收率。 同时为适用不同的油 藏条件， 在高温高压复合热载体注入过程对注入流量按照空气量进行调节， 给 定量空气后自动调节柴油流量使热载体高温高压密闭燃烧充分彻底， 输出二氧 化碳、 氮气、 水及水蒸气； 通过柴油流量精确自动调节***实现柴油在高压条 件下可以按照给定的配比， 对应空气量输入柴油保证燃烧精确； 通过柴油流量 精确自动调节***的流量精确调整和***补偿循环控制实现柴油既能在小流 量高压顺利点火， 又能实现高压大流量精确控制连续稳定安全燃烧； 高压软化 水流量调节控制***既保证柴油复合热载体发生器安全运行， 也保证输出热载 体温度可以按照工艺要求进行控制。
图 2为本发明一实施例的柴油流量调节***原理示意图。 参见图 2， 本发 明一实施例的柴油型复合热载体发生***， 通过柴油调节阀 31、 变频高压油泵 32实现停机时即时截断柴油供应， 通过变频高压油泵 32和 PLC (可编程控制 器） 程序调节柴油流量满足复合热载体发生器点火、 运行时温度要求和高压燃 烧流量控制稳定要求， 通过柴油止回阀 37可以防止当燃烧室内压力过高致使 复合热载体倒流的安全保证。
图 3为本发明一实施例的温度调节***原理示意图。 参见图 3， 本发明一 实施例的柴油型复合热载体发生***， 通过变频高压水泵 42变频控制水流量， 实现输出热载体温度满足工艺要求， 同时通过水流量控制***确保冷却水温度 满足设备安全运行， 确保柴油复合热载体发生器核心安全得以控制。
图 4为本发明一实施例的安全控制***原理示意图。 参见图 4， 本发明一 实施例的柴油型复合热载体发生***， 通过空气压力变送器 24检测空气压力， 空气止回阀 25防止复合热载体回流形损坏管路原件， 空气质量流量计 23计量 注入的空气流量， 压力、 流量实时监控； 通过柴油管路 30的柴油质量流量计 35、 柴油止回阀 37、 柴油压力变送器 33和 36实现供油***流量控制和安全保 护； 通过水管路 40的水质量流量计 45、 水止回阀 47、 水过滤器 44、 水压力变 送器 43和 46实现供水***水量保证和安全保护； 通过输出管线的输出温度变 送器 13、 输出安全阀 14、 电动排空阀 15、 输出止回阀 18和输出截止阀 19， 实现注入工艺过程止回、 超温、 超压报警停车及排空泄压， 形成高温高压安全 高效注入技术。

Claims

权 利 要 求
1、 一种柴油型复合热载体发生***， 包括复合热载体发生器、 空气管路、 柴油管路和软化水管路， 所述复合热载体发生器的输入端分别与空气管路、 柴 油管路和软化水管路相连接，
所述空气管路上依次设置有第一空气调节阀、 第二空气调节阀、 空气质量 流量计、 空气压力变送器和空气止回阀；
所述柴油管路上依次设置有柴油调节阀、 变频高压油泵、 第一柴油压力变 送器、 柴油过滤器、 柴油质量流量计、 第二柴油压力变送器和柴油止回阀， 所 述柴油变频高压油泵上连接设置有柴油电机；
所述软化水管路上依次设置有软化水调节阀、 变频高压水泵、 第一水压力 变送器、 水过滤器、 水质量流量计、 第二水压力变送器和水止回阀， 所述变频 高压水泵上连接设置有水泵电机；
所述复合热载体发生器的输出端通过复合热载体输送管线与油层相连接， 所述复合热载体输送管线包括通过管路依次连接的热载体压力变送器、 输出温 度变送器、 输出安全阀、 第二喷嘴、 输出止回阀和输出截止阀。
2、 根据权利要求 1所述的柴油型复合热载体发生***， 其中所述复合热 载体发生器上设置有冷却水温度变送器。
3、 根据权利要求 1或 2所述的柴油型复合热载体发生***， 其中所述复 合热载体发生器的输出端还连接有废液回收管路， 所述废液回收管路包括通过 管路相互连接的电动排空阀和第一喷嘴， 所述第一喷嘴连接设置于所述输出安 全阀与第二喷嘴之间。
PCT/CN2013/079036 2013-05-20 2013-07-09 柴油型复合热载体发生*** WO2014187023A1 (zh)

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