CN101190743A - Carbon dioxide geological storage method based on self-separation of mixed fluid - Google Patents
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- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- E21B41/0064—Carbon dioxide sequestration
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及一种二氧化碳(CO2)地质封存方法，尤其涉及一种基于混合流体自分离的CO2地质封存方法，主要针对CO2深部卤水地层(深含水层)的CO2地质封存。The present invention relates to a carbon dioxide (CO2 ) geological storage method, in particular to a CO2 geological storage method based on mixed fluid self-separation, mainly aimed atCO2 geological storage in deep brine formations (deep aquifers).
背景技术Background technique
目前CO2地质封存方法主要采用的场地地质构造类型有：石油和天然气储层、深部卤水地层(简称深含水层)、不可开采的煤层、玄武岩等地质构造。在每一种类型中，CO2的地质封存都将CO2压缩注入地下岩石构造中。目前CO2地质封存采用的方法有：CO2-EOR(CO2增强石油开采)、CO2-ECBM(CO2增强煤层气开采方法)、CO2驱替天然气并气田封存、CO2深含水层封存、CO2玄武岩封存、CO2废弃矿井封存、CO2岩盐封存等。目前，CO2的地质封存正在三个工业规模的项目中进行(100万吨CO2/年或以上的量级)：北海的斯莱普内尔(Sleipner)项目；加拿大的韦本(Weyburn)项目和阿尔及利亚的萨拉赫(Salah)项目。每年捕获约3-4兆吨CO2并封存在地质构造中，否则将会释放到大气中。表1列出了全世界其它的CO2地质封存项目。各种CO2地质封存方法在先导、示范、工业规模等阶段，且有非常好的效果。At present, the main types of site geological structures used inCO2 geological storage methods are: oil and natural gas reservoirs, deep brine formations (abbreviated as deep aquifers), unminable coal seams, basalt and other geological structures. In each type, geological storage ofCO2 compressesCO2 into subsurface rock formations. Currently, CO2 geological storage methods are: CO2 -EOR (CO2 enhanced oil recovery), CO2 -ECBM (CO2 enhanced coal bed methane recovery method), CO2 displacement of natural gas and gas field storage, CO2 deep aquifer Storage, CO2 basalt storage, CO2 abandoned mine storage, CO2 rock salt storage, etc. Geological storage ofCO2 is currently underway in three industrial-scale projects (on the order of 1 million tonsCO2 /year or more): the Sleipner project in the North Sea; the Weyburn project in Canada; project and the Salah project in Algeria. About 3-4 megatons ofCO2 are captured annually and stored in geological formations that would otherwise be released into the atmosphere. Table 1 lists other CO2 geological storage projects around the world. Various CO2 geological storage methods are in the stages of pilot, demonstration, and industrial scale, and have very good results.
以上CO2地质封存方法都需要CO2捕获、运输、注入、监测等阶段组成，其中CO2的捕获成本在整个CO2封存成本中的比重是非常大的，远超过一半。若能够降低CO2捕获和分离的成本，整个CO2地质封存的成本会降低。The above CO2 geological storage methods all require CO2 capture, transportation, injection, monitoring and other stages, and the cost of CO2 capture accounts for a very large proportion of the total cost of CO2 storage, far more than half. If the cost of CO2 capture and separation can be reduced, the overall cost of CO2 geological storage will be reduced.
以上CO2地质封存方法全采用纯度非常高的CO2气体(例如：CO2浓度＞95％以上)进行地质封存，因此对CO2气源捕获要求特别高，导致整个封存成本高，而且捕获成本很难在短期内降低，必须寻找新的方法降低地质封存的成本。The above CO2 geological storage methods all use very high-purity CO2 gas (for example: CO2 concentration > 95%) for geological storage, so the requirements for CO2 gas source capture are particularly high, resulting in high cost of the entire storage, and the capture cost It is difficult to reduce in the short term, and new methods must be found to reduce the cost of geological storage.
表1 国外进行的大型二氧化碳地质封存研发项目Table 1 Large-scale carbon dioxide geological storage research and development projects abroad
发明内容Contents of the invention
本发明为了克服现有技术存在的上述缺点和不足，降低地质封存对气源CO2浓度的高要求，从而降低封存成本，提高CO2地质封存技术的经济性，而提供一种基于混合流体自分离的CO2地质封存方法。本发明是一种简单、有效，而且能与常规CO2地质封存同时完成的方法。In order to overcome the above-mentioned shortcomings and deficiencies in the prior art, the present invention reduces the high requirements of geological sequestration on gas sourceCO2 concentration, thereby reducing the cost of sequestration and improving the economical efficiency ofCO2 geological sequestration technology, and provides a self-separation method based on mixed fluid OffshoreCO2 geological storage methods. The present invention is a simple and effective method that can be completed simultaneously with conventionalCO2 geological storage.
本发明的目的是这样实现的。The purpose of the present invention is achieved like this.
CO2地质封存技术经过多年的发展，已经成为一种具有巨大温室气体减排潜力的技术；各种地质封存方法已经在先导、示范、工业阶段，为混合流体自分离二氧化碳地质封存方法的提出奠定了基础。After years of development, CO2 geological storage technology has become a technology with great potential for reducing greenhouse gas emissions; various geological storage methods have been in the pilot, demonstration, and industrial stages, laying the foundation for the proposal of mixed fluid self-separation carbon dioxide geological storage methods base.
本发明包括下列步骤：The present invention comprises the following steps:
①在选定的地质封存场地形成注入井(10)和排放井(20)，一直贯穿帽岩(41)进入地质封存层(43)；如图1.1所示。①Injection wells (10) and discharge wells (20) are formed at the selected geological storage site, and penetrate the cap rock (41) and enter the geological storage layer (43); as shown in Figure 1.1.
②通过高压注入设备将含有CO2的混合流体连续不断地通过注入井(10)注入地质封存层(43)；如图1.1所示。② Continuously inject the mixed fluid containing CO2 into the geological storage layer (43) through the injection well (10) through high-pressure injection equipment; as shown in Figure 1.1.
③注入井(10)注入一定时间后，通过排放井(20)释放迁移到排放井(20)的流体，同时控制排放井(20)井口的压力在一定的范围。③ After the injection well (10) is injected for a certain period of time, the fluid migrating to the discharge well (20) is released through the discharge well (20), and the pressure at the wellhead of the discharge well (20) is controlled within a certain range.
④持续进行混合流体的注入和排放井(20)的释放，直到排放井(20)排出的流体中CO2浓度大于经济浓度值为止，停止整个封存过程。④ Continuously inject the mixed fluid and release from the discharge well (20), until theCO2 concentration in the fluid discharged from the discharge well (20) is greater than the economic concentration value, and stop the entire sequestration process.
本发明的工作原理：Working principle of the present invention:
本发明主要利用CO2在水中的溶解度远远大于N2在盐水层水体中的溶解度和混合流体在迁移过程中不断溶解两个特点。将从气源中捕获的含CO2的混合流体，采用高压注入设备将混合流体在一定压力下通过注入井(10)注入深部圈闭构造地层或封存地层(43)中；混合流体注入的早期阶段，注入的混合流体主要排开含水层多孔介质中的盐水，占据地层中的部分多孔介质空间，如图1.1所示，部分混合流体被束缚在或溶解于残余多孔介质孔隙中。由于地层盐水的密度大于注入混合流体的密度，混合流体在排开和驱赶地层流体的过程中，混合流体密度小于深部盐水，混合流体受到上浮力作用向上迁移，同时由于混合流体的低粘度(混合流体的粘滞系数远低与盐水的粘滞系数)，混合流体主要沿上部圈闭层的帽岩(41)底部迁移，混合流体沿帽岩(41)底部迁移的速度大于沿底板(42)的迁移速度，形成图1中的倒三角混合流体区域。特别沿倾斜构造地层迁移的过程，混合流体沿帽岩(41)顶部迁移的速度更快，相同的时间内混合流体沿帽岩(41)迁移更长的距离，形成图1.2中的倒三角混合流体区域(31)。混合流体中的各种成分在迁移过程中不断溶解，随着时间，混合流体中小溶解度的气体成分会在帽岩(41)底部形成连通的通道，如图1.3所示。形成连通通道后，混合流体不断同下部盐水作用，其中可溶成分主要通过溶解和分子扩散、弥散、异重流、对流等形式扩散到低浓度区域，未溶解的混合流体成分将通过连通通道在圈闭构造的穹顶(44)汇集，通过排放井(20)将这部分气体排出地层，这样封存地层中将会封存绝大多数CO2气体，其它小溶解度的气体(主要为N2)会被排放井(20)排出封存地层(43)外。The present invention mainly utilizes the two characteristics that the solubility ofCO2 in water is far greater than that ofN2 in saline layer water and that the mixed fluid dissolves continuously during migration. The mixed fluid containingCO2 captured from the gas source is injected into the deep trap formation or storage formation (43) through the injection well (10) under a certain pressure by using high-pressure injection equipment; the early stage of the mixed fluid injection stage, the injected mixed fluid mainly displaces the brine in the porous medium of the aquifer and occupies part of the porous medium space in the formation, as shown in Fig. 1.1, part of the mixed fluid is bound or dissolved in the residual porous medium pores. Since the density of the formation brine is greater than that of the injected mixed fluid, the density of the mixed fluid is lower than that of the deep brine during the process of displacing and driving the formation fluid, and the mixed fluid migrates upwards due to the buoyancy. The viscosity coefficient of the fluid is much lower than that of brine), the mixed fluid mainly migrates along the bottom of the cap rock (41) in the upper trap layer, and the migration speed of the mixed fluid along the bottom of the cap rock (41) is faster than that along the floor (42) The migration velocity of , forming the inverted triangle mixed fluid region in Fig. 1. Especially in the process of migrating along inclined structural strata, the mixed fluid migrates faster along the top of the cap rock (41), and the mixed fluid migrates a longer distance along the cap rock (41) in the same time period, forming the inverted triangle mixing in Fig. 1.2 Fluid area (31). Various components in the mixed fluid are continuously dissolved during the migration process. Over time, the gas components with low solubility in the mixed fluid will form connected channels at the bottom of the cap rock (41), as shown in Fig. 1.3. After the communication channel is formed, the mixed fluid continuously interacts with the lower brine, and the soluble components mainly diffuse to the low-concentration area through dissolution and molecular diffusion, dispersion, hyperpycnal flow, convection, etc. The undissolved mixed fluid components will pass through the communication channel. The dome (44) of the trap structure is collected, and this part of the gas is discharged from the formation through the discharge well (20), so that most of the CO2 gas will be stored in the storage formation, and other gases with small solubility (mainly N2 ) will be The discharge well (20) discharges out of the storage formation (43).
混合流体到达排放井(20)附近初期，混合流体中还没有束缚和溶解的成分绝大多数为N2，极少部分为CO2，排放井(20)排出的流体成分主要为N2，随着注入过程的发展，高浓度CO2会向排放井(20)方向迁移，因此排放井(20)中的CO2浓度会越来越高。当排放井(20)的CO2浓度超过经济浓度后，CO2地质封存可以停止了，如图3所示。When the mixed fluid arrives near the discharge well (20), most of the unbound and dissolved components in the mixed fluid are N2 , and a very small part is CO2 . The fluid components discharged from the discharge well (20) are mainly N2 . With the development of the injection process, high-concentration CO2 will migrate toward the discharge well (20), so the CO2 concentration in the discharge well (20) will become higher and higher. When the CO2 concentration in the discharge well (20) exceeds the economic concentration, CO2 geological storage can be stopped, as shown in FIG. 3 .
本发明具有下列优点和积极效果：The present invention has following advantage and positive effect:
大幅度降低地质封存对CO2捕获的浓度要求，大幅度降低CO2捕获的成本和整个CO2地质封存的成本，大幅度增加了CO2含水层地质封存的早期机会。Significantly reduce the concentration requirement of geological storage forCO2 capture, greatly reduce the cost ofCO2 capture and the cost of overallCO2 geological storage, and greatly increase the early opportunities for geological storage ofCO2 aquifers.
本发明适用于CO2地质封存领域，适用于将CO2封存与深部卤水层(深含水层)，特别适合倾斜地层和穹顶构造的深部卤水层的CO2地质封存；该方法是CO2地质封存的延伸和突破。The present invention is applicable to the field ofCO2 geological storage, and is suitable for storingCO2 with deep brine layers (deep aquifers), and is particularly suitable for theCO2 geological storage of deep brine layers in inclined strata and dome structures; the method is CO2 geological storage Extend and break.
附图说明Description of drawings
图1.1是混合流体注入初期的示意图；Figure 1.1 is a schematic diagram of the initial stage of mixed fluid injection;
图1.2是混合流体在封存地层中形成连通通道示意图；Figure 1.2 is a schematic diagram of the mixed fluid forming a communication channel in the storage formation;
图1.3是混合流体到达排放井示意图；Figure 1.3 is a schematic diagram of the mixed fluid reaching the discharge well;
图2是本发明的水平面示意图；Fig. 2 is a horizontal plane schematic diagram of the present invention;
图3是排放井中CO2和N2浓度随时间变化关系图；Fig. 3 is the relationship diagram ofCO2 andN2 concentration with time in the discharge well;
图4是多封存地层情况下的封存剖面示意图(多层水平井)；Fig. 4 is a schematic diagram of the storage section under the condition of multiple storage formations (multi-layer horizontal well);
图5是水平地层情况下的封存剖面示意图。Fig. 5 is a schematic diagram of a storage section in a horizontal formation.
其中：in:
10-注入井；10 - injection well;
11-注入井水平部分；11-horizontal part of the injection well;
12-注入井垂直部分。12 - Injection well vertical section.
20-排放井；20 - discharge well;
21-排放井水平部分；21 - the horizontal part of the discharge well;
22-排放井垂直部分。22 - Drain well vertical section.
(地层流体区域划分情况)(Regional division of formation fluid)
31-混合流体区域；31 - mixed fluid area;
32-盐水区域；32 - salt water area;
33-混合流体与盐水分界带(混合带)。33 - Mixed fluid and brine boundary zone (mixed zone).
(地层岩性划分情况)(Division of strata and lithology)
41-帽岩；41 - cap rock;
42-底板(或中间夹层)；42-bottom plate (or middle interlayer);
43-封存地层；43 - storage formation;
44-穹顶。44 - Dome.
具体实施方式Detailed ways
下面结合附图和实施例对本发明进一步说明：Below in conjunction with accompanying drawing and embodiment the present invention is further described:
本方法是对CO2地质封存方法的创新，传统方法中的部分技术仍然适用于本发明。This method is an innovation to theCO2 geological storage method, and some techniques in the traditional method are still applicable to the present invention.
1、关于场地选择和预备工作1. Regarding site selection and preparation
本发明适用于一般深部盐水地层的CO2地质封存，特别适用于有较好的圈闭地质构造、褶皱构造或者倾斜地层条件的地质封存，封存的深部盐水地层具有良好的帽岩(41)或顶板，一般为页岩、泥岩、板岩等致密、完整连续、低渗透的岩层，要求帽岩(41)渗透性远远低于盐水含水层的渗透系数，帽岩(41)具有较高的进气值[进气值大于通过注入井(10)注入的混合流体压力，至少10MPa以上]，帽岩(41)必须连续，在封存工程范围内不允许出现强渗透性的断层或破碎带。对于多层含水层的地质情况，严格要求最上层帽岩(41)具有同上的性质，但对中间夹层[图4中为底板(42)]不需要如此严格的标准，中间夹层泄漏气体，会在上一层夹层或帽岩(41)底部汇集，对整个自分离CO2封存影响不大，如图4所示。The present invention is suitable for the geological storage ofCO2 in general deep saline formations, and is particularly suitable for geological storage with good trap geological structures, fold structures or inclined strata conditions. The deep saline formations to be stored have good cap rocks (41) or The roof is generally dense, complete, continuous, and low-permeable rock formations such as shale, mudstone, and slate. It is required that the permeability of the cap rock (41) is far lower than that of the saline aquifer, and the cap rock (41) has a higher Intake value [the intake value is greater than the pressure of the mixed fluid injected through the injection well (10), at least 10MPa], the cap rock (41) must be continuous, and no strong permeability faults or broken zones are allowed within the scope of the storage project. For the geological conditions of multi-layer aquifers, it is strictly required that the uppermost cap rock (41) has the same properties as above, but such strict standards are not required for the interlayer [it is the bottom plate (42) in Fig. 4], and the interlayer leaks gas, which will Collection at the bottom of the upper interlayer or cap rock (41) has little effect on the overall self-separatedCO2 sequestration, as shown in Figure 4.
深部含水层中帽岩(41)最好有穹顶(44)(背斜构造或其他穹顶形状构造)，在穹顶内形成汇集区域，便于汇集的流体通过排放井(20)集中排出，如图1.3所示，对于多层含水层，有同样的要求。若无穹顶构造，排放井(20)位置可以采用图5中的形式，不过排放操作难度相对穹顶构造的排放井(20)要大一些。The cap rock (41) in the deep aquifer preferably has a dome (44) (anticline structure or other dome-shaped structure), forming a collection area in the dome, so that the collected fluid can be discharged through the discharge well (20), as shown in Figure 1.3 As shown, the same requirement holds for multilayered aquifers. If there is no dome structure, the discharge well (20) position can adopt the form among Fig. 5, but the discharge operation difficulty relative dome structure discharge well (20) will be larger.
2、关于步骤①2. About step ①
如图1.1～1.3所示，本发明所述的地质封存场地为深部卤水层，至少包含一个注入井(10)和一个排放井(20)。注入井(10)和排放井(20)的形式各种各样，可采用水平井、垂直井等各种形式的钻井。As shown in Figures 1.1 to 1.3, the geological storage site described in the present invention is a deep brine layer, including at least one injection well (10) and one discharge well (20). Injection wells (10) and discharge wells (20) have various forms, and various forms of drilling such as horizontal wells and vertical wells can be used.
在选定的封地质存构造场地形成注入井(10)和排放井(20)，一直贯穿帽岩(41)进入地质封存层(43)；Injection wells (10) and discharge wells (20) are formed at the selected sealing geological storage structure site, and penetrate the cap rock (41) and enter the geological storage layer (43);
注入井(10)和排放井(20)一般采用水平井技术成井，水平井包含：超长水平井、小曲率水平井、垂直水平井、多分支水平井、羽状水平井等水平井技术。水平井的技术已经非常成熟了，可以直接采用。注入井(10)和排放井(20)的垂直部分穿过帽岩(41)进入圈闭构造内部。钻井的垂直穿过帽岩的钻井套管和帽岩(41)之间需要充分密封，防止混合流体通过密封薄弱环节逃逸出封存地层(43)。钻井的水平部分尽量平行于地层走向，实现更大面积上封存二氧化碳。Injection wells (10) and discharge wells (20) generally adopt horizontal well technology to form wells, and horizontal wells include: ultra-long horizontal wells, small curvature horizontal wells, vertical horizontal wells, multi-branch horizontal wells, pinnate horizontal wells and other horizontal well technologies. Horizontal well technology is very mature and can be directly adopted. The vertical sections of the injection well (10) and the discharge well (20) pass through the cap rock (41) into the interior of the trap structure. The drilling casing vertically passing through the cap rock and the cap rock (41) need to be fully sealed to prevent the mixed fluid from escaping from the storage formation (43) through the weak link of the seal. The horizontal part of the well should be as parallel as possible to the strike of the formation to achieve carbon dioxide sequestration in a larger area.
施工过程中，注入井的水平部分(11)尽量位于封存地层(43)底部；而排放井的水平部分(21)尽量位于封存地层(43)的上部，便于排出汇集在穹顶的流体。During construction, the horizontal part (11) of the injection well is located at the bottom of the storage formation (43) as far as possible; and the horizontal part (21) of the discharge well is located at the upper part of the storage formation (43) as much as possible, so as to facilitate the discharge of the fluid collected in the dome.
注入井(10)和排放井(20)的位置主要取决于地层构造，排放井(20)一般位于穹顶(44)位置，主要便于流体的迁移和汇集，注入井(10)和排放井(20)的(水平井为水平段的间距)间距一般为50～100km，最佳间距为1km～10km范围。The positions of the injection well (10) and the discharge well (20) mainly depend on the formation structure, and the discharge well (20) is generally located at the dome (44) position, which is mainly convenient for the migration and collection of the fluid. The injection well (10) and the discharge well (20 ) (horizontal well is the spacing of the horizontal section) is generally 50-100km, and the optimal spacing is in the range of 1km-10km.
在注入混合流体前期和初期，可以通过注入井(10)和排放井(20)抽排或释放压力等方式适当降低整个封存地层的流体压力，然后可以降低混合流体的注入难度，提高注入性。成井过程中需要特别注意套管耐压和钻井与岩层之间密封问题。In the early stage and initial stage of injecting the mixed fluid, the fluid pressure of the entire storage formation can be appropriately reduced by pumping or releasing the pressure of the injection well (10) and the discharge well (20), and then the difficulty of injecting the mixed fluid can be reduced and the injectability can be improved. Special attention should be paid to casing pressure resistance and sealing between drilling and rock formation during well formation.
3、关于步骤②：3. Regarding step ②:
通过高压注入设备将混合流体(主要成分为CO2、N2，其余成分不限，其余成分含量为少量和微量)通过注入井(10)连续注入封存地层(43)；注入井中的压力需要大于地层流体的压力。The mixed fluid (the main components are CO2 and N2 , the remaining components are not limited, and the content of the remaining components is small and trace) is continuously injected into the storage formation (43) through the injection well (10) through the high-pressure injection equipment; the pressure in the injection well needs to be greater than Formation fluid pressure.
注入混合流体中CO2浓度越高越好，浓度越高，场地封存的CO2也越多，排气量也越少，注入量相应减少；但CO2捕获成本会越高，因此在两者之间必须平衡和妥协，CO2浓度最好能够大于60％～90％之间(现有的低成本气体分离技术很容易达到或者一些气体排放源中本身满足这些要求)，从而实现整个封存过程中捕获与注入的总成本最低。The higher the concentration of CO2 in the injected mixed fluid, the better. The higher the concentration, the more CO2 will be sequestered in the site, the less the exhaust volume will be, and the injection volume will be reduced accordingly; however, the cost of CO2 capture will be higher, so in both There must be a balance and compromise between them, and the CO2 concentration should preferably be greater than 60% to 90% (existing low-cost gas separation technology is easy to achieve or some gas emission sources themselves meet these requirements), so as to realize the entire storage process The total cost of capture and injection is the lowest.
4、关于步骤③4. About the steps ③
注入一定时间后，在排放井(20)释放迁移到排放井(20)附近的流体，排放过程中需要控制排放井(20)井口的压力在一定的范围，实时监测排出气体中的CO2浓度，并控制排放井(20)井口压力，不允许(即控制排放井井口压力)，CO2的分压过低，导致排放井周围溶解于盐水中CO2气体析出进入排放井(20)。After injecting for a certain period of time, the fluid migrating to the vicinity of the discharge well (20) is released in the discharge well (20). During the discharge process, it is necessary to control the pressure of the well head of the discharge well (20) within a certain range, and monitor theCO concentration in the discharge gas in real time. , and control the discharge well (20) wellhead pressure, do not allow (i.e. control the discharge well wellhead pressure),CO The partial pressure is too low, causing theCO gas to be dissolved in the brine around the discharge well to separate out and enter the discharge well (20).
上述所述的一定时间没有明确界定，主要取决于混合流体迁移到排放井(20)并在穹顶(44)或者帽岩(41)底部汇集的时间。一般根据监测信息确定。The above-mentioned certain time is not clearly defined, and mainly depends on the time when the mixed fluid migrates to the discharge well (20) and collects at the bottom of the dome (44) or cap rock (41). It is generally determined based on monitoring information.
5、关于步骤④5. About step ④
持续进行步骤②③，实现以下目的。Continue to carry out steps ②③ to achieve the following goals.
随着注入过程和排气过程的进行，排放井(20)排出混合流体中的成分变化如图2所示；关于经济浓度的确定值，本发明不包括该值，由具体操作过程确定，一般CO2浓度的范围为30％～60％，最优化的CO2经济浓度由具体工程确定。二氧化碳浓度超过该值，马上停止混合流体注入，整个封存工作完成。Along with the carrying out of injection process and exhaust process, discharge well (20) discharges the component change in the mixed fluid as shown in Figure 2; About the definite value of economic concentration, the present invention does not include this value, is determined by specific operation process, generally The CO2 concentration ranges from 30% to 60%, and the optimal CO2 economic concentration is determined by specific projects. When the concentration of carbon dioxide exceeds this value, the injection of the mixed fluid is immediately stopped, and the entire storage work is completed.
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| CN116658137B (en)* | 2023-07-21 | 2023-10-31 | 中国石油大学(华东) | Method and system for sealing and self-flowing water injection of aquifer CO ₂ to increase yield of crude oil |
| CN116658137A (en)* | 2023-07-21 | 2023-08-29 | 中国石油大学(华东) | Method and system for carbon dioxide sequestration in aquifer and self-flowing water injection to increase crude oil production |
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| CN117819119B (en)* | 2024-03-06 | 2024-05-10 | 太原理工大学 | Continuous integrated device and method for trapping, sealing and separating underground rock stratum of flue gas |
| CN119494145A (en)* | 2024-11-14 | 2025-02-21 | 中国科学院武汉岩土力学研究所 | Methods and evaluation methods for rapid mineralization of carbon dioxide in basalt to build reservoirs |
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| CN101190743B (en) | 2013-11-06 |
| WO2009071001A1 (en) | 2009-06-11 |
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