WO2015085674A1 - Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well - Google Patents
Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well Download PDFInfo
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- WO2015085674A1 WO2015085674A1 PCT/CN2014/072422 CN2014072422W WO2015085674A1 WO 2015085674 A1 WO2015085674 A1 WO 2015085674A1 CN 2014072422 W CN2014072422 W CN 2014072422W WO 2015085674 A1 WO2015085674 A1 WO 2015085674A1
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- oil
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- electric heating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Definitions
- the method is applicable to the bottom-water heavy oil reservoir and the high-condensation oil reservoir developed by the thermal mining method in the petroleum industry, and is mainly for the high viscosity or high wax content of the crude oil of the reservoir, low steam steam stimulation or steam flooding efficiency.
- the thermal recovery method proposed by the problems of short production time, high rate of decline and low degree of production.
- the current electric heating production method is limited to the sucker rod and wellbore heating method, and its purpose is to improve the oil and gas lifting capacity of the production well. , reducing the viscosity and wax formation of crude oil; 4) horizontal well hydraulic fracturing electric heating oil shale in-situ thermal recovery method, extended to heavy oil reservoir implementation is difficult, high cost, serious environmental pollution; 5) current thermal mining The method belongs to the method of local heating oil layer, the oil layer is unevenly heated, the heat holding time is short, the efficiency is low, the residual oil has high oil saturation, and the main oil is concentrated in the unheated zone and the thermal effect. Area.
- “Hot fast” is an electric heater commonly used in life. It can be used to boil water, hot milk, brew coffee, etc., changing the traditional way of heating the container from the outside of the container, using a simple to almost only
- the waterproofing resistor is inserted into the container to save time, water, electricity and labor, and at the same time, it is cheap, convenient and efficient.
- the water is natural, making it possible to electrically heat the water layer. This method is economical, environmentally friendly, simple to operate and has high thermal efficiency, and the heat energy will meet the production demand well;
- “Boiler steamed buns” is a typical example of the heat effect of heating in the bottom water in life. As long as the bottom water is continuously heated, it does not matter if a few drawers are steamed. The pressure and temperature in the steamer are released with the buns. The bottom water of the bottom water reservoir is heated, the temperature will gradually transfer upward to the entire reservoir, and the accumulated reservoir pressure (reservoir and fluid thermal expansion, dissolved gas release pressure), temperature rise, can be effectively released with crude oil production. At the same time, controlling the heating time and temperature can control the temperature of the reservoir and the degree of pressure rise, and the operation is simple and easy. When the overall temperature of the bottom water reservoir is between 80 ° C and 100 ° C, which is the flowable state of the formation crude oil, the thermal recovery of the crude oil can be realized;
- the bottom-bottom water reservoir has good reservoir connectivity, good caprock sealing conditions, high initial oil temperature of the formation, and crude oil flowability are prerequisites for hydrocarbon migration and accumulation, and the formation is within a certain temperature range.
- the phase change of crude oil is reversible.
- the oil and gas can reach the pores as effective passages.
- the heat transfer of the reservoir is faster than the surrounding mudstones. The heat can be continuously transmitted from the bottom to the top and the effective heat preservation of the surrounding mudstones can be achieved, thus achieving the “central heating” of the entire reservoir;
- the reservoir can be divided into 10 types according to the distribution characteristics of oil and gas, block bottom water reservoir, layered structure block bottom water reservoir, massive edge bottom water reservoir, layered edge water reservoir, block gas Top (bottom water) oil and gas reservoirs, massive gas-bottom water reservoirs, layered gas-top water reservoirs, layered gas cap reservoirs, pure reservoirs, pure gas reservoirs, in addition to pure reservoirs, pure gas reservoirs and Outside the layered gas cap reservoirs, most of the oil and gas reservoirs are developed at the bottom water, and there is sufficient stratigraphic water resources to provide sufficient material guarantee for the horizontal wells of the horizontal wells to heat the reservoirs;
- the ground temperature gradient is 2.5 ⁇ 4.5°C/100m, the ground temperature of the middle and deep layer and the deep deep oil layer is between 35 ⁇ 103.5°C, or even higher.
- the temperature of the electrically heated formation water is 80 ⁇ 150°C to the crude oil movable condition, and the temperature difference is 23.5 ⁇ 47.5. °C, the deeper the formation water, the less power required, the higher the electric heater power, the faster the water temperature rises.
- multiple electric water heaters can be used for simultaneous heating, which can quickly increase the formation temperature;
- the overall heating, the internal temperature rise of the reservoir is similar to that of the pressure cooker.
- the boiling temperature of the formation water is higher than 100, and the relationship between the boiling point of water and pressure (Table 1) shows that the formation pressure is 3-20 MPa.
- the boiling point temperature of water is 132.9 ⁇ 211.4°C. The higher the pressure, the higher the boiling point, and below the boiling point temperature, it can satisfy the temperature rise of the reservoir to the crude oil flow state. Therefore, continuous heating of the formation water under high temperature and high pressure, as long as the temperature and pressure monitoring is done, combined with the pressure relief and cooling characteristics of the production well, it is feasible to control the temperature and pressure rise of the formation water;
- the electric heating technology of pipeline skin electric heating, wellbore or sucker rod is relatively mature, the temperature is controllable, the material is resistant to high temperature, and it can meet the long-distance transmission of electric energy, heating the oil well, and the heat dissipation problem of the wire can be well solved and utilized. ;
- the electric heating magnet descaling technology can effectively solve the scale phenomenon generated during the electric heating process.
- the generation of scale is due to the hard water quality, the magnet can soften the water, environmentally friendly, economical, convenient and safe.
- the iron nut body, the main raw materials include BaFe12019 and SrFe12019, which are manufactured by ceramic process, have good temperature resistance, low price and suitable performance, and are widely used permanent magnets;
- the structure of the horizontal well electric heater is shown in Figure 1.
- the horizontal well screen is divided into two parts, the upper part, and the tube is internally provided with a plurality of spring-like electric heaters connected in series.
- the horizontal diameter of the screen is placed at the horizontal and the lower part is sieved.
- the tube is hollow and sealed for thermal insulation;
- the wire part can be used as a wellbore or sucker rod electric heater to achieve the purpose of heat dissipation and heating; if the horizontal well is drilled separately, the wire needs a skin heating device, priority High temperature resistant material to prevent overheating of the wires in the wellbore.
- a plurality of horizontal wells are drilled in the upper part of the bottom water layer of the reservoir, and an electric heater is built in the horizontal well to heat the bottom water of the reservoir to improve the temperature of the entire reservoir, and the heat transfer effect and the water-dissolved gas overflow steam drive effect are utilized.
- High-efficiency oil recovery by the effect of thermal expansion pressure of formation water and oil layer and viscosity reduction/crude oil of crude oil under high temperature conditions.
Abstract
A side and bottom water layer thermal recovery method allowing electrically heating oil deposit in a horizontal well. A water layer is electrically heated by using a plurality of horizontal wells that are located at the upper part of a side and bottom water layer of oil deposit and are 20-30m away from the oil layer, so that the temperature of the whole oil deposit is uniformly increased to a state in which in-place oil can flow, so as to achieve centralized heat supply by means of thermal recovery, thereby improving the thermal recovery efficiency of a single well. Also disclosed is an electric heating structure for a horizontal well. The electric heating structure is provided with a sieve pipe. A plurality of ferromagnetic permanent magnets is deployed at the upper part of the inner side of the sieve pipe. Spring-shaped electric heating rods serially connected together are disposed in the middle. A heat separation board is disposed in the position of a horizontal diameter. A half lower sieve pipe is sealed and is hollow and jointly separate heat in combination with the heat separation board, and the down transfer of heat energy is reduced.
Description
本方法适用于石油行业中利用热采方法开发的边底水稠油油藏、高凝油油藏,主要针对油藏原油黏度高或含蜡量高、原油蒸汽吞吐或蒸汽驱热采效率低、稳产时间短、递减率高及采出程度低等问题而提出的热采方法。
The method is applicable to the bottom-water heavy oil reservoir and the high-condensation oil reservoir developed by the thermal mining method in the petroleum industry, and is mainly for the high viscosity or high wax content of the crude oil of the reservoir, low steam steam stimulation or steam flooding efficiency. The thermal recovery method proposed by the problems of short production time, high rate of decline and low degree of production.
蒸汽吞吐、蒸汽驱、热水驱及火烧油层等方法是热采开发油藏有效技术手段，但随着开发的不断深入，生产中暴露出越来越多的问题，特别是对中深层至特超深层油藏（深度600~2300米）来说，生产中的矛盾表现更为突出：
1)蒸汽吞吐、蒸汽驱、热水驱因长距离运输而热损失严重，热效低，生产井出水率高，产量低，递减率高，油藏最终采出程度受影响；2）火烧油层方法尽管在部分普通稠油断块试采有效，能够满足工业生产需求，但大部分特超稠油油藏并不适用，而且这种开发方式是破坏性开采，不亚于竭泽而渔、杀鸡取卵，油藏一旦破坏，未来先进的热采方法便不再有可能实施，实乃没办法的办法；3）目前电加热采油方法局限于抽油杆及井筒加热方式，其目的是提升采油井油气举升能力，降低原油黏度及结蜡现象；4）水平井水力压裂电加热油页岩原位热采方法，推广到稠油油藏实施起来难度大、成本高、环境污染严重；5)目前热采方法均属于局部加热油层方法，油层受热不均匀，热力持效时间短，效率低，剩余油含油饱和度高，主要富集在热力未波及区及热效低区域。
Steam stimulation, steam flooding, hot water flooding and fired oil layers are effective technical means for thermal recovery of oil reservoirs. However, as development progresses, more and more problems are exposed in production, especially for medium to deep layers. In ultra-deep reservoirs (depth 600~2300 meters), the contradictions in production are more prominent:
1) Steam stimulation, steam flooding, hot water flooding due to long-distance transportation, heat loss is serious, thermal efficiency is low, production well water output rate is high, yield is low, decline rate is high, and the final recovery degree of the reservoir is affected; 2) fire oil layer Although the test is effective in some common heavy oil fault blocks and can meet the industrial production demand, most of the ultra-heavy oil reservoirs are not suitable, and this development method is destructive mining, which is no less than the exhaustion of fish, killing chickens and taking eggs, and reservoirs. Once destroyed, the future advanced thermal recovery method is no longer possible, but there is no way to do it; 3) The current electric heating production method is limited to the sucker rod and wellbore heating method, and its purpose is to improve the oil and gas lifting capacity of the production well. , reducing the viscosity and wax formation of crude oil; 4) horizontal well hydraulic fracturing electric heating oil shale in-situ thermal recovery method, extended to heavy oil reservoir implementation is difficult, high cost, serious environmental pollution; 5) current thermal mining The method belongs to the method of local heating oil layer, the oil layer is unevenly heated, the heat holding time is short, the efficiency is low, the residual oil has high oil saturation, and the main oil is concentrated in the unheated zone and the thermal effect. Area.
原理基础：Principle basis:
1.集中供暖
严寒中，一个人穿棉衣取暖，一家人用房屋围火取暖，而一栋大楼，最佳的取暖方式是集中供暖，这三者中，最经济、最有效、最方便的是集中供暖。油藏热采过程中，单井吞吐类似一个人的取暖，组合吞吐加热类似房屋取暖，如果整个油藏能作为一个单元实现集中供暖，地层温度得到整体提升，那么单井热采问题就会得到很好地解决；Central heating
In the cold, one person wears a cotton coat to warm, the family uses a house to keep warm, and the best heating method for a building is central heating. Among the three, the most economical, most effective, and most convenient is central heating. In the thermal recovery process of a reservoir, single well throughput is similar to one's heating. Combined heating and heating is similar to house heating. If the entire reservoir can be used as a unit to achieve central heating and the formation temperature is improved overall, then the single well thermal recovery problem will be obtained. Well solved;
2.“热得快”是生活中常用的一种电加热器，可以用来烧开水、热牛奶、煮咖啡等，改变传统从容器外部加热容器这一生热方式，用一只简单到差不多只需经过防水处理的电阻伸进容器中，即可做到省时、省水、省电、省力，兼顾了价廉、方便和高效。对于边底水油藏来说，水是天然的，使电加热水层成为可能，这种方法经济、环保、操作简单同时热效高，热能将很好地满足生产需求；2. "Hot fast" is an electric heater commonly used in life. It can be used to boil water, hot milk, brew coffee, etc., changing the traditional way of heating the container from the outside of the container, using a simple to almost only The waterproofing resistor is inserted into the container to save time, water, electricity and labor, and at the same time, it is cheap, convenient and efficient. For the bottom-bottom water reservoir, the water is natural, making it possible to electrically heat the water layer. This method is economical, environmentally friendly, simple to operate and has high thermal efficiency, and the heat energy will meet the production demand well;
3.“笼屉蒸包子”是生活中底水加热取得热效应的典型例子，只要底水持续加热，蒸几屉都没关系，蒸锅里的压力、温度随包子取出而得到释放。边底水油藏底水受热，温度会逐渐向上热传递到整个油藏，而逐渐积累的油藏压力(储层及流体热膨胀、溶解气释放气压)、温度上升，可随原油生产得到有效释放，同时，控制加热时间、温度即可控制油藏温度、压力上升程度，操作简便易行。当边底水油藏整体温度介于80℃~100℃，即为地层原油可流动状态，就能实现原油热采；3. "Boiler steamed buns" is a typical example of the heat effect of heating in the bottom water in life. As long as the bottom water is continuously heated, it does not matter if a few drawers are steamed. The pressure and temperature in the steamer are released with the buns. The bottom water of the bottom water reservoir is heated, the temperature will gradually transfer upward to the entire reservoir, and the accumulated reservoir pressure (reservoir and fluid thermal expansion, dissolved gas release pressure), temperature rise, can be effectively released with crude oil production. At the same time, controlling the heating time and temperature can control the temperature of the reservoir and the degree of pressure rise, and the operation is simple and easy. When the overall temperature of the bottom water reservoir is between 80 ° C and 100 ° C, which is the flowable state of the formation crude oil, the thermal recovery of the crude oil can be realized;
4.冷热水重力分异现象
海洋受阳光照射，表层温度高，而向底层水温逐渐降低，除受洋流影响，冷热水呈重力分异现象，不会出现冷热水上下滚动现象，热损失仅表现为冷热水热传递。因此，在地层水上部近油层处，持续电加热，油藏整体温度会有效提升；4. Differential gravity phenomenon of hot and cold water
The ocean is exposed to sunlight, the surface temperature is high, and the water temperature to the bottom layer is gradually reduced. In addition to being affected by ocean currents, the hot and cold water is gravity-divided, and there is no phenomenon of hot and cold water rolling up and down. The heat loss is only represented by hot and cold water heat transfer. . Therefore, in the upper part of the formation water near the oil layer, continuous electric heating, the overall temperature of the reservoir will be effectively improved;
可行性论证： Feasibility argument:
1.
边底水油藏作为一个统一的油气水系统，储层连通性好、盖层封闭条件好、地层原油初始温度高、原油可流动是油气运移成藏的前提，且在一定温度范围内地层原油物相变化是可逆的。油气所能到达孔隙均为有效通道，储层热传递较周围的泥岩快，热量可以实现由下向上不断传递且得到周围泥岩的有效保温，因而可以实现整个油藏的“集中供暖”；
1.
As a unified oil and gas water system, the bottom-bottom water reservoir has good reservoir connectivity, good caprock sealing conditions, high initial oil temperature of the formation, and crude oil flowability are prerequisites for hydrocarbon migration and accumulation, and the formation is within a certain temperature range. The phase change of crude oil is reversible. The oil and gas can reach the pores as effective passages. The heat transfer of the reservoir is faster than the surrounding mudstones. The heat can be continuously transmitted from the bottom to the top and the effective heat preservation of the surrounding mudstones can be achieved, thus achieving the “central heating” of the entire reservoir;
2.
油藏按油气水分布特征可划分为10种类型，块状底水油藏、层状结构块状底水油藏、块状边底顶水油藏、层状边水油藏、块状气顶（底水）油气藏、块状气顶底水油气藏、层状气顶边水油气藏、层状气顶油气藏、纯油藏、纯气藏，除纯油藏、纯气藏及层状气顶油气藏外，大部分油气藏边底水发育，有充分的地层水资源，为水平井电加热油藏边底水层提供充分物质保证；2.
The reservoir can be divided into 10 types according to the distribution characteristics of oil and gas, block bottom water reservoir, layered structure block bottom water reservoir, massive edge bottom water reservoir, layered edge water reservoir, block gas Top (bottom water) oil and gas reservoirs, massive gas-bottom water reservoirs, layered gas-top water reservoirs, layered gas cap reservoirs, pure reservoirs, pure gas reservoirs, in addition to pure reservoirs, pure gas reservoirs and Outside the layered gas cap reservoirs, most of the oil and gas reservoirs are developed at the bottom water, and there is sufficient stratigraphic water resources to provide sufficient material guarantee for the horizontal wells of the horizontal wells to heat the reservoirs;
3.
地温梯度在2.5~4.5℃/100m条件下，中深层、特深层油层地温介于35~103.5℃，甚至更高，电加热地层水温度至原油可动条件80~150℃，温差在23.5~47.5℃，地层水越深，所需电能越少，电加热器功率越高，水温提升越快。另一方面，可以用多个电热水器同时加热，可快速提高地层温度；3.
The ground temperature gradient is 2.5~4.5°C/100m, the ground temperature of the middle and deep layer and the deep deep oil layer is between 35~103.5°C, or even higher. The temperature of the electrically heated formation water is 80~150°C to the crude oil movable condition, and the temperature difference is 23.5~47.5. °C, the deeper the formation water, the less power required, the higher the electric heater power, the faster the water temperature rises. On the other hand, multiple electric water heaters can be used for simultaneous heating, which can quickly increase the formation temperature;
4.
对于封闭油藏来说，整体受热，油藏内部温压上升特点类似高压锅，高压状态下，地层水沸点温度高于100，水熔沸点与压力的关系（表1）显示，地层压力3～20MPa条件下，水沸点温度在132.9～211.4℃，压力越高，沸点越高，在其沸点温度之下，能满足油藏升温至原油流动状态。因此，在高温高压下持续给地层水加热，只要做好温压监测，配合生产井泄压、降温特点，控制地层水的温度和压力上升幅度是可行的；4.
For closed reservoirs, the overall heating, the internal temperature rise of the reservoir is similar to that of the pressure cooker. Under high pressure, the boiling temperature of the formation water is higher than 100, and the relationship between the boiling point of water and pressure (Table 1) shows that the formation pressure is 3-20 MPa. Under the condition, the boiling point temperature of water is 132.9～211.4°C. The higher the pressure, the higher the boiling point, and below the boiling point temperature, it can satisfy the temperature rise of the reservoir to the crude oil flow state. Therefore, continuous heating of the formation water under high temperature and high pressure, as long as the temperature and pressure monitoring is done, combined with the pressure relief and cooling characteristics of the production well, it is feasible to control the temperature and pressure rise of the formation water;
5.
目前管线集肤电伴热、井筒或抽油杆等电加热技术相对成熟，温度可控、材料耐高温，能够满足长距离输送电能，给油井加热，导线散热问题能得到很好的解决和利用；5.
At present, the electric heating technology of pipeline skin electric heating, wellbore or sucker rod is relatively mature, the temperature is controllable, the material is resistant to high temperature, and it can meet the long-distance transmission of electric energy, heating the oil well, and the heat dissipation problem of the wire can be well solved and utilized. ;
6.
“热得快”浸没在液体中，热量通过液体很快散发出来，这样使液体很快被加热，而且也不会烧坏电热丝，安全、环保、经济、有效。6.
"Hot fast" is immersed in the liquid, and the heat is quickly dissipated through the liquid, so that the liquid is quickly heated and the electric heating wire is not burned, which is safe, environmentally friendly, economical and effective.
7.
电加热磁铁除垢技术能有效解决电加热过程中产生的水垢现象。水垢的产生，源于水质较硬，磁铁能够将水软化，环保、经济、方便而又安全。铁养体磁体，主要原料包括BaFe12019和SrFe12019，通过陶瓷工艺法制造而成，具有较好的耐温性、价格低廉、性能适用，为广泛的永久磁体；7.
The electric heating magnet descaling technology can effectively solve the scale phenomenon generated during the electric heating process. The generation of scale is due to the hard water quality, the magnet can soften the water, environmentally friendly, economical, convenient and safe. The iron nut body, the main raw materials include BaFe12019 and SrFe12019, which are manufactured by ceramic process, have good temperature resistance, low price and suitable performance, and are widely used permanent magnets;
1）在边底水油藏水层上部距油层20~30m处钻水平井，放置水平井电加热器，对水层进行电加热；1) Drill a horizontal well at a distance of 20~30m from the oil layer in the upper part of the water layer of the bottom-bottom water reservoir, and place a horizontal well electric heater to electrically heat the water layer;
2)
水平井电加热器结构如图1，水平井筛管分上下两部分，上半部分，管内置多个串联在一起弹簧状电加热器，筛管水平直径处放置隔热板，下半部分筛管中空密封，起隔热作用；2)
The structure of the horizontal well electric heater is shown in Figure 1. The horizontal well screen is divided into two parts, the upper part, and the tube is internally provided with a plurality of spring-like electric heaters connected in series. The horizontal diameter of the screen is placed at the horizontal and the lower part is sieved. The tube is hollow and sealed for thermal insulation;
3）筛管上部内侧悬挂固定数条铁养体磁体棒，防水垢生成；3) A plurality of iron-supported magnet rods are suspended and fixed on the inner side of the upper part of the screen tube to generate scale.
可安全、环保、经济、高效开发中深层——超深层稠油油藏及高凝油油藏，提高该类油藏开发效果，提高油藏最终采收率。 It can safely, environmentally, economically and efficiently develop medium and deep layers – ultra-deep heavy oil reservoirs and high-condensation oil reservoirs to improve the development of such reservoirs and improve the ultimate recovery of reservoirs.
①割缝筛管；1 slitted screen;
②铁养体永久磁铁棒；2 iron body permanent magnet rod;
③弹簧状螺旋式电加热器；3 spring-shaped spiral electric heater;
④隔热板；4 insulation board;
⑤筛管密封板，内中空，与隔热板一起防止电热能向下方传递。5 screen sealing plate, hollow inside, together with the heat insulation board to prevent the electric heat from being transmitted downward.
1）在边底水油藏水层上部距油层20~30m处钻水平井，这样可存蓄足够热能使油层温度整体上升，延缓地层水过早沸腾，压力过大致地层破裂；
1) Drill horizontal wells 20~30m from the oil layer in the upper part of the water layer of the bottom-bottom water reservoir, so that sufficient heat can be stored to increase the temperature of the oil layer as a whole, delay the boiling of the formation water too early, and the pressure is excessively fractured;
2）水平井数量、长度及走向根据水体及油藏体积大小决定，砾石填充裸眼完井； 2) The number, length and direction of the horizontal wells are determined according to the size of the water body and the reservoir, and the gravel is filled with the open hole completion;
3）水平井如果利用油井进行侧钻，导线部分即可用做井筒或抽油杆电加热器，以此达到散热和加热的目的；如果单独钻水平井，导线需用集肤伴热装置，优先耐高温材料以防止井筒内导线过热。
3) Horizontal wells If the oil well is used for side drilling, the wire part can be used as a wellbore or sucker rod electric heater to achieve the purpose of heat dissipation and heating; if the horizontal well is drilled separately, the wire needs a skin heating device, priority High temperature resistant material to prevent overheating of the wires in the wellbore.
在油藏边底水层上部靠油层处钻多口水平井，在水平井内置电加热器，对油藏边底水加热使整个油藏温度得到提升，利用热传递效果、水溶解气溢出汽驱效果、地层水及油层热膨胀压力及高温条件下原油降粘/原油析蜡效果进行高效采油。
A plurality of horizontal wells are drilled in the upper part of the bottom water layer of the reservoir, and an electric heater is built in the horizontal well to heat the bottom water of the reservoir to improve the temperature of the entire reservoir, and the heat transfer effect and the water-dissolved gas overflow steam drive effect are utilized. High-efficiency oil recovery by the effect of thermal expansion pressure of formation water and oil layer and viscosity reduction/crude oil of crude oil under high temperature conditions.
适用热采开发稠油及高凝油边底水油藏，特别是中深层——超深层边底水难采稠油油藏、高凝油油藏 It is suitable for the development of heavy oil and high-condensation oil bottom-water reservoirs, especially in the middle and deep layers - ultra-deep bottom-bottom water-difficult heavy oil reservoirs, high-condensation oil reservoirs
Claims (2)
- [根据细则26改正14.03.2014]
水平井电加热油藏边底水层热采方法的特点是在油藏边底水层上部靠近油层 20~30m处钻数口水平井对水层进行电加热，以此达到整个油藏温度均衡上升至地层原油可流动状态，实现热采集中供暖、提高单井热采效率的目的，不同于目前采油井筒及油杆电加热方法，后者的目的仅仅是降低井筒内稠油粘度或高凝油结蜡程度，提升抽油井举升能力；[Correction according to Rule 26 14.03.2014]
The hot mining method of the horizontal well electric heating reservoir bottom layer is characterized by drilling several horizontal wells near the oil layer 20~30m in the upper part of the reservoir bottom layer to electrically heat the water layer, thereby achieving a balanced rise of the entire reservoir temperature. The flowable state of the crude oil to the formation, the purpose of achieving heat recovery in heat collection and improving the efficiency of single well thermal recovery is different from the current oil wellbore and oil rod electric heating method. The purpose of the latter is only to reduce the viscosity of the heavy oil or high condensate in the wellbore. Increase the degree of waxing and enhance the lifting capacity of the pumping well; - [根据细则26改正14.03.2014]
水平井电加热结构设计的特点是筛管内侧上部置数根铁养体永久磁体，中间放置串联在一起的弹簧状电加热棒，水平直径位置放置隔热板，下半筛管密封中空，与隔热板共同起隔热作用，减少热能向下传递。 [Correction according to Rule 26 14.03.2014]
The design of the horizontal well electric heating structure is characterized in that a plurality of permanent magnets are placed on the inner side of the screen tube, and a spring-shaped electric heating rod connected in series is placed in the middle, and a heat insulating plate is placed at a horizontal diameter position, and the lower half screen is sealed and hollow, and The heat shields together act as a thermal barrier to reduce heat transfer down.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2016122953A RU2653203C2 (en) | 2013-12-12 | 2014-02-22 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
| CA2933277A CA2933277C (en) | 2013-12-12 | 2014-02-22 | A centrally thermal recovery method for excavating oil from an oil reservoir by electrically heating edge-bottom water layer with horizontal wells |
| US15/039,454 US20170002637A1 (en) | 2013-12-12 | 2014-02-22 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
| CN201480001286.3A CN106062304A (en) | 2013-12-12 | 2014-02-22 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689685.0A CN103615215A (en) | 2013-12-12 | 2013-12-12 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
| CN201310689685.0 | 2013-12-12 |
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| WO2015085674A1 true WO2015085674A1 (en) | 2015-06-18 |
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| PCT/CN2014/072422 WO2015085674A1 (en) | 2013-12-12 | 2014-02-22 | Side and bottom water layer thermal recovery method allowing electrically heating oil deposit in horizontal well |
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| Country | Link |
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| US (1) | US20170002637A1 (en) |
| CN (2) | CN103615215A (en) |
| CA (1) | CA2933277C (en) |
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| CN106593379B (en) * | 2016-12-21 | 2019-06-11 | 中国石油天然气股份有限公司 | A kind of horizontal well steam assisted gravity drainage starting method and device |
| CN108505977B (en) * | 2018-04-18 | 2020-04-21 | 吉林大学 | Method for exploiting natural gas hydrate by using sleeve type heater |
| CN108487888B (en) * | 2018-05-24 | 2023-04-07 | 吉林大学 | Auxiliary heating device and method for improving oil gas recovery ratio of oil shale in-situ exploitation |
| CN108924974B (en) * | 2018-09-17 | 2020-10-13 | 中国石油大学(华东) | Electric heating material for thickened oil recovery and preparation method thereof |
| CN110080734A (en) * | 2019-04-17 | 2019-08-02 | 中国石油化工股份有限公司 | Method of Compound Development is let out in the drive of shallow-thin layer bottom water viscous crude |
| CN110905470B (en) * | 2019-12-17 | 2021-11-02 | 于文英 | Method for exploiting oil and gas by utilizing bottom water resources of oil and gas reservoir |
| CN112131704A (en) * | 2020-08-17 | 2020-12-25 | 长江大学 | Method for estimating reservoir of oil layer and predicting saturation of residual oil |
| CN112855079B (en) * | 2021-03-29 | 2023-01-17 | 北京红蓝黑能源科技有限公司 | Immersed horizontal well electric heater for heating formation water |
| CN113719261A (en) * | 2021-09-27 | 2021-11-30 | 北京红蓝黑能源科技有限公司 | Method for improving economic benefit of single well by exploiting oil gas through bottom water steam flooding |
| CN114016979A (en) * | 2021-11-05 | 2022-02-08 | 北京红蓝黑能源科技有限公司 | Oil and gas exploitation method for injecting water into water layer of oil and gas reservoir |
| CN114183108B (en) * | 2021-12-21 | 2023-02-21 | 北京红蓝黑能源科技有限公司 | Method for improving transverse driving force in bottom steam flooding oil gas production process |
| CN114183109B (en) * | 2021-12-23 | 2023-02-28 | 北京红蓝黑能源科技有限公司 | Method for exploiting oil gas by continuously heating formation water at temperature lower than boiling point of water |
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| Publication number | Publication date |
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| CA2933277A1 (en) | 2015-06-18 |
| RU2653203C2 (en) | 2018-05-07 |
| RU2016122953A (en) | 2017-12-12 |
| CA2933277C (en) | 2021-01-19 |
| CN106062304A (en) | 2016-10-26 |
| US20170002637A1 (en) | 2017-01-05 |
| CN103615215A (en) | 2014-03-05 |
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