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CN106707365A - Method for monitoring geothermal reservoir temperature and fracture distribution and device thereof - Google Patents

Method for monitoring geothermal reservoir temperature and fracture distribution and device thereof Download PDF

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CN106707365A
CN106707365A CN201611108483.2A CN201611108483A CN106707365A CN 106707365 A CN106707365 A CN 106707365A CN 201611108483 A CN201611108483 A CN 201611108483A CN 106707365 A CN106707365 A CN 106707365A
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tracer
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孙海
樊冬艳
姚军
张�林
张磊
孙致学
杨永飞
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China University of Petroleum East China
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Abstract

本发明公开了一种监测地热储层温度和裂缝分布的方法和装置,该方法通过纳米示踪剂进行一次测量就能够得到地热储层的温度分布,其返回曲线能够用来确定阈值纳米示踪剂发生反应的时间,然后再通过时间反过来确定地热储层的阈值温度位置,最后结合阈值纳米示踪剂和非纳米示踪剂的响应曲线,确定地热储层的温度分布,最后根据至少两个生产井中阈值纳米示踪剂的数量确定地热储层裂缝分布,实现了地热储层的温度分布和裂缝分布的真实监测,同时还可以实现地热储层温度和裂缝分布情况的反复测量。

The invention discloses a method and device for monitoring the temperature and fracture distribution of a geothermal reservoir. The method can obtain the temperature distribution of the geothermal reservoir by performing a measurement with a nano-tracer, and its return curve can be used to determine the threshold nano-tracer The time when the agent reacts, and then reverse the time to determine the threshold temperature position of the geothermal reservoir, and finally combine the response curves of the threshold nano-tracer and non-nano-tracer to determine the temperature distribution of the geothermal reservoir, and finally according to at least two The number of threshold nano-tracers in each production well determines the fracture distribution of the geothermal reservoir, which realizes the real monitoring of the temperature distribution and fracture distribution of the geothermal reservoir, and can also realize the repeated measurement of the temperature and fracture distribution of the geothermal reservoir.

Description

一种监测地热储层温度和裂缝分布的方法和装置A method and device for monitoring temperature and fracture distribution of geothermal reservoir

技术领域technical field

本发明实施例涉及地热储层开发技术领域,特别涉及一种监测地热储层温度和裂缝分布的方法和装置。The embodiments of the present invention relate to the technical field of geothermal reservoir development, in particular to a method and device for monitoring the temperature and fracture distribution of geothermal reservoirs.

背景技术Background technique

随着不可再生的石油、煤炭等传统能源日益紧缺,以风能、太阳能、地热等为代表的绿色可再生能源地位日益突出,其中,地热以其清洁、分布广泛、热储层巨大,被视为21世纪最具有潜力的能源资源。由于干热岩往往缺乏足够的渗透率/孔隙度,必须通过人工压裂建立注水井和生产井之间的连接,同时为了建立可持续的增强型地热系统,避免热突破现象,必须同时考虑注水井和生产井间的连通性和储层裂隙-基质热交换面积,故温度和裂隙分布的监测和分析技术,是评价储层改造效果,保证持续高效提取地热能的关键技术。With the increasing shortage of non-renewable traditional energy sources such as petroleum and coal, the status of green renewable energy represented by wind energy, solar energy, and geothermal energy has become increasingly prominent. The most potential energy resource in the 21st century. Since hot dry rocks often lack sufficient permeability/porosity, the connection between injection wells and production wells must be established through artificial fracturing, and in order to establish a sustainable enhanced geothermal system and avoid thermal breakthrough phenomena, injection must be considered at the same time. The connectivity between water wells and production wells and the reservoir fracture-matrix heat exchange area, so the monitoring and analysis technology of temperature and fracture distribution is the key technology to evaluate the effect of reservoir stimulation and ensure the continuous and efficient extraction of geothermal energy.

已有技术中,用于监测地热储层的温度和裂隙分布的方法主要包括采用微地震技术的远场监测方法和采用放射性示踪剂测井技术的近场监测方法。In the prior art, methods for monitoring the temperature and fracture distribution of geothermal reservoirs mainly include far-field monitoring methods using microseismic technology and near-field monitoring methods using radioactive tracer logging technology.

采用微地震技术的远场监测方法主要是通过检测裂缝延伸过程中岩石内部因剪切破坏而产生的声发射信号,以此来研究储层中裂缝延伸过程和裂缝参数。然而,记录的微地震信号与被支撑剂所支撑的裂缝是无关的(如微地震信号可能是由不含支撑剂的裂缝所引起,也可能由其它非水力连通区的岩石释放应力时所引起),并且不同点产生的地震波会相互作用并干扰接收器接收的最终信号,所以采用微地震技术的远场监测方法并不精确。采用微地震技术的远场监测方法只能在压裂过程中实施,不能进行压后重复测量,不能确定支撑剂在裂缝中的分布,也即不能确定有效裂缝参数。The far-field monitoring method using microseismic technology is mainly to study the fracture extension process and fracture parameters in the reservoir by detecting the acoustic emission signal generated by shear failure inside the rock during the fracture extension process. However, the recorded microseismic signals are independent of proppant-supported fractures (for example, microseismic signals may be caused by fractures without proppant, or by the release of stress in rocks in other non-hydraulic connected zones ), and the seismic waves generated at different points will interact and interfere with the final signal received by the receiver, so the far-field monitoring method using microseismic technology is not accurate. The far-field monitoring method using microseismic technology can only be implemented during the fracturing process, and cannot perform repeated measurements after fracturing, and cannot determine the distribution of proppant in the fracture, that is, it cannot determine the effective fracture parameters.

采用放射性示踪剂测井技术的近场监测方法是在压裂过程中将放射性示踪剂加入压裂液中,压裂后进行光谱伽玛射线测井,以此来解释裂缝参数。这种方法存在半衰期、放射性等问题,并且放射性材料随压裂液在裂缝中的行进过程可能出现分层或分离现象,最终获取的结果并不能反映实际的裂缝结构。采用放射性示踪剂测井技术的近场监测方法需要在压裂后立即进行测量,不具备实时监测的能力,并且仅能获得近井筒范围内的裂缝参数。The near-field monitoring method using radiotracer logging technology is to add radioactive tracers into the fracturing fluid during fracturing, and perform spectral gamma ray logging after fracturing to interpret fracture parameters. This method has problems such as half-life and radioactivity, and the radioactive material may appear to be stratified or separated as the fracturing fluid travels in the fracture, and the final results obtained cannot reflect the actual fracture structure. The near-field monitoring method using radiotracer logging technology needs to be measured immediately after fracturing, does not have the ability of real-time monitoring, and can only obtain fracture parameters near the wellbore.

发明内容Contents of the invention

为了解决现有技术的问题,本发明实施例提供了一种监测地热储层温度和裂缝分布的方法和装置,实现地热储层的温度分布和裂缝分布的真实监测,同时还可以实现地热储层温度和裂缝分布情况的反复测量。所述技术方案如下:In order to solve the problems of the prior art, the embodiment of the present invention provides a method and device for monitoring the temperature and fracture distribution of the geothermal reservoir, which can realize the real monitoring of the temperature distribution and fracture distribution of the geothermal reservoir, and can also realize the Repeated measurements of temperature and crack distribution. Described technical scheme is as follows:

第一方面,本发明实施例提供一种监测地热储层温度和裂缝分布的方法,所述方法包括:In a first aspect, an embodiment of the present invention provides a method for monitoring geothermal reservoir temperature and fracture distribution, the method comprising:

采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂;Using silica nanoparticles to react with nitrogen to generate threshold nanotracers;

获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量;Obtaining the maximum dilution volume of the geothermal reservoir, and calculating the quantity of nanotracers used for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir;

向注水井内同时注入所述阈值纳米示踪剂和非阈值纳米示踪剂,其中,所述阈值纳米示踪剂和所述非阈值纳米示踪剂具有相同的运移规律和反应过程;Simultaneously injecting the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, wherein the threshold nano-tracer and the non-threshold nano-tracer have the same migration law and reaction process;

第一预设时间阈值之后,对所述注水井进行取样检测,并根据检测结果绘制所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线;After the first preset time threshold, the water injection well is sampled and detected, and the response curves of the threshold nanotracer and the non-nanometer tracer are drawn according to the detection results;

根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布;determining the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-nano-tracer, and obtaining the temperature distribution of the geothermal reservoir;

第二预设时间阈值之后,对所述注水井周围的至少两个生产井进行取样检测,并根据检测结果确定所述至少两个生产井中所述阈值纳米示踪剂的数量;After the second preset time threshold, at least two production wells around the water injection well are sampled and detected, and the quantity of the threshold nanotracer in the at least two production wells is determined according to the detection results;

根据所述至少两个生产井中所述阈值纳米示踪剂的数量确定所述地热储层裂缝分布。The geothermal reservoir fracture distribution is determined based on the threshold nanotracer quantity in the at least two production wells.

可选的,所述采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂,包括:Optionally, the reaction of silicon dioxide nanoparticles and nitrogen gas is used to generate a threshold nanotracer, including:

二氧化硅纳米颗粒与氮气在高温下反应,生成表面附加有一个氨基的二氧化硅纳米颗粒;Silica nanoparticles react with nitrogen at high temperature to produce silica nanoparticles with an amino group attached to the surface;

将所述表面附加有一个氨基的二氧化硅纳米颗粒与所述氨基发生置换,生成阈值纳米示踪颗粒。The silicon dioxide nanoparticle with an amino group attached to the surface is replaced with the amino group to generate threshold nanometer tracer particles.

可选的,所述获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量,包括:Optionally, the acquiring the maximum dilution volume of the geothermal reservoir, and calculating the quantity of the nano-tracer for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir includes:

根据公式VP=πr2hφEr计算所述地热储层的最大稀释体积,其中,VP为所述地热储层的最大稀释体积;r为注水井与生产井间的距离;φ为注水井与生产井间的孔隙度;Er为注水井与生产井间的连通系数;Calculate the maximum dilution volume of the geothermal reservoir according to the formula V P = πr 2 hφE r , where V P is the maximum dilution volume of the geothermal reservoir; r is the distance between the water injection well and the production well; φ is the water injection well The porosity between the injection well and the production well; E r is the connectivity coefficient between the injection well and the production well;

根据公式A≥μMDLVP计算用于向所述地热储层投放的纳米示踪剂的数量,其中,A为用于向所述地热储层投放的纳米示踪剂的数量;μ为保障系数;MDL为仪器的最低检测极限。Calculate the quantity of the nano-tracer used to put into the geothermal reservoir according to the formula A≥μM LV P , wherein A is the quantity of the nano-tracer used to put into the geothermal reservoir; μ is the guarantee factor; MDL is the lowest detection limit of the instrument.

可选的,所述根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布,包括:Optionally, determining the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-nano-tracer, and obtaining the temperature distribution of the geothermal reservoir includes:

根据导热模型计算生产井的温度降低曲线,并根据所述温度降低曲线确定到达临界温度所需的时间;Calculate the temperature reduction curve of the production well according to the heat conduction model, and determine the time required to reach the critical temperature according to the temperature reduction curve;

根据到达临界温度所需的时间,确定所述地热储层的阈值温度位置;Determine the threshold temperature position of the geothermal reservoir according to the time required to reach the critical temperature;

根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,和所述地热储层的阈值温度位置,获取所述地热储层的温度分布。According to the response curves of the threshold nano-tracer and the non-nano-tracer, and the threshold temperature position of the geothermal reservoir, the temperature distribution of the geothermal reservoir is obtained.

另一方面,本发明实施例还提供一种监测地热储层温度和裂缝分布的装置,所述装置包括:On the other hand, an embodiment of the present invention also provides a device for monitoring the temperature and distribution of fractures in a geothermal reservoir, the device comprising:

第一处理模块,用于采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂;The first processing module is used to react with silicon dioxide nanoparticles and nitrogen to generate a threshold nanotracer;

第一获取模块,用于获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量;The first acquisition module is used to acquire the maximum dilution volume of the geothermal reservoir, and calculate the quantity of nanotracers used for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir;

第二处理模块,用于向注水井内同时注入所述阈值纳米示踪剂和非阈值纳米示踪剂,其中,所述阈值纳米示踪剂和所述非阈值纳米示踪剂具有相同的运移规律和反应过程;The second processing module is used to simultaneously inject the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, wherein the threshold nano-tracer and the non-threshold nano-tracer have the same migration Laws and reaction processes;

第三处理模块,用于在第一预设时间阈值之后,对所述注水井进行取样检测,并根据检测结果绘制所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线;The third processing module is used to sample and detect the water injection well after the first preset time threshold, and draw the response curve of the threshold nanotracer and the non-nanometer tracer according to the detection result;

第一确定模块,用于根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布;The first determination module is used to determine the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-nano-tracer, and obtain the temperature distribution of the geothermal reservoir;

第四处理模块,用于在第二预设时间阈值之后,对所述注水井周围的至少两个生产井进行取样检测,并根据检测结果确定所述至少两个生产井中所述阈值纳米示踪剂的数量;The fourth processing module is configured to perform sampling detection on at least two production wells around the water injection well after the second preset time threshold, and determine the threshold nano-trace in the at least two production wells according to the detection results the amount of the dose;

第二确定模块,用于根据所述至少两个生产井中所述阈值纳米示踪剂的数量确定所述地热储层裂缝分布。A second determining module, configured to determine the fracture distribution of the geothermal reservoir according to the quantity of the threshold nano-tracer in the at least two production wells.

可选的,所述第一处理模块具体用于:Optionally, the first processing module is specifically used for:

二氧化硅纳米颗粒与氮气在高温下反应,生成表面附加有一个氨基的二氧化硅纳米颗粒;Silica nanoparticles react with nitrogen at high temperature to produce silica nanoparticles with an amino group attached to the surface;

将所述表面附加有一个氨基的二氧化硅纳米颗粒与所述氨基发生置换,生成阈值纳米示踪颗粒。The silicon dioxide nanoparticle with an amino group attached to the surface is replaced with the amino group to generate threshold nanometer tracer particles.

可选的,所述第一获取模块具体用于:Optionally, the first acquisition module is specifically used for:

根据公式VP=πr2hφEr计算所述地热储层的最大稀释体积,其中,VP为所述地热储层的最大稀释体积;r为注水井与生产井间的距离;φ为注水井与生产井间的孔隙度;Er为注水井与生产井间的连通系数;Calculate the maximum dilution volume of the geothermal reservoir according to the formula V P = πr 2 hφE r , where V P is the maximum dilution volume of the geothermal reservoir; r is the distance between the water injection well and the production well; φ is the water injection well The porosity between the injection well and the production well; E r is the connectivity coefficient between the injection well and the production well;

根据公式A≥μMDLVP计算用于向所述地热储层投放的纳米示踪剂的数量,其中,A为用于向所述地热储层投放的纳米示踪剂的数量;μ为保障系数;MDL为仪器的最低检测极限。Calculate the quantity of the nano-tracer used to put into the geothermal reservoir according to the formula A≥μM LV P , wherein A is the quantity of the nano-tracer used to put into the geothermal reservoir; μ is the guarantee factor; MDL is the lowest detection limit of the instrument.

可选的,所述第一确定模块具体用于:Optionally, the first determining module is specifically configured to:

根据导热模型计算生产井的温度降低曲线,并根据所述温度降低曲线确定到达临界温度所需的时间;Calculate the temperature reduction curve of the production well according to the heat conduction model, and determine the time required to reach the critical temperature according to the temperature reduction curve;

根据到达临界温度所需的时间,确定所述地热储层的阈值温度位置;Determine the threshold temperature position of the geothermal reservoir according to the time required to reach the critical temperature;

根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,和所述地热储层的阈值温度位置,获取所述地热储层的温度分布。According to the response curves of the threshold nano-tracer and the non-nano-tracer, and the threshold temperature position of the geothermal reservoir, the temperature distribution of the geothermal reservoir is obtained.

本发明实施例提供的技术方案带来的有益效果是:The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

本发明实施例提供的方法,首先采用二氧化硅纳米颗粒和氮气反应,制作阈值纳米示踪剂,然后根据地热储层的最大稀释体积计算用于向该地热储层投放的纳米示踪剂的数量,进而向注水井内同时注入阈值纳米示踪剂和非阈值纳米示踪剂,其中,阈值纳米示踪剂和非阈值纳米示踪剂具有相同的运移规律和反应过程;第一预设时间阈值之后,对注水井进行取样检测,并根据检测结果绘制阈值纳米示踪剂和非纳米示踪剂的响应曲线,然后根据阈值纳米示踪剂和非纳米示踪剂的响应曲线,确定地热储层的阈值温度位置,并获取地热储层的温度分布;第二预设时间阈值之后,对注水井周围的至少两个生产井进行取样检测,并根据检测结果确定至少两个生产井中阈值纳米示踪剂的数量,然后根据至少两个生产井中阈值纳米示踪剂的数量确定地热储层裂缝分布。本发明实施例提供的方法,通过纳米示踪剂进行一次测量就能够得到地热储层的温度分布,其返回曲线能够用来确定阈值纳米示踪剂发生反应的时间,然后再通过时间反过来确定地热储层的阈值温度位置,最后结合阈值纳米示踪剂和非纳米示踪剂的响应曲线,确定地热储层的温度分布,最后根据至少两个生产井中阈值纳米示踪剂的数量确定地热储层裂缝分布,实现了地热储层的温度分布和裂缝分布的真实监测,同时还可以实现地热储层温度和裂缝分布情况的反复测量。In the method provided by the embodiment of the present invention, firstly, silicon dioxide nanoparticles and nitrogen are used to react to produce a threshold nano-tracer, and then the nano-tracer used to inject the geothermal reservoir is calculated according to the maximum dilution volume of the geothermal reservoir. Quantity, and then simultaneously inject threshold nano-tracer and non-threshold nano-tracer into the water injection well, wherein, threshold nano-tracer and non-threshold nano-tracer have the same migration law and reaction process; the first preset time After the threshold, the water injection well is sampled and detected, and the response curves of the threshold nano-tracer and non-nano-tracer are drawn according to the detection results, and then the geothermal storage capacity is determined according to the response curve of the threshold nano-tracer and non-nano-tracer. The threshold temperature position of the reservoir, and obtain the temperature distribution of the geothermal reservoir; after the second preset time threshold, at least two production wells around the water injection well are sampled and detected, and the threshold nanometer display in at least two production wells is determined according to the detection results The number of tracers in the geothermal reservoir is then determined based on the number of threshold nanotracers in at least two production wells. According to the method provided by the embodiment of the present invention, the temperature distribution of the geothermal reservoir can be obtained by one measurement of the nano-tracer, and its return curve can be used to determine the time when the threshold nano-tracer reacts, and then reversely determined by time The threshold temperature location of the geothermal reservoir, and finally the temperature distribution of the geothermal reservoir is determined by combining the response curves of threshold nanotracers and non-nanotracers, and finally the geothermal reservoir is determined based on the number of threshold nanotracers in at least two production wells It realizes the real monitoring of the temperature distribution and fracture distribution of the geothermal reservoir, and can also realize the repeated measurement of the temperature and fracture distribution of the geothermal reservoir.

附图说明Description of drawings

为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

图1为本发明实施例提供的一种监测地热储层温度和裂缝分布的方法的流程示意图;Fig. 1 is a schematic flow chart of a method for monitoring geothermal reservoir temperature and fracture distribution provided by an embodiment of the present invention;

图2为本发明实施例提供的一种监测地热储层温度和裂缝分布的装置的结构示意图。Fig. 2 is a schematic structural diagram of a device for monitoring geothermal reservoir temperature and fracture distribution provided by an embodiment of the present invention.

图3为本发明实施例提供的阈值纳米示踪剂和非阈值纳米示踪剂的响应曲线示意图;Figure 3 is a schematic diagram of the response curves of threshold nanotracers and non-threshold nanotracers provided by the embodiments of the present invention;

图4为本发明实施例提供的渗透流速雷达示意图。Fig. 4 is a schematic diagram of a permeation velocity radar provided by an embodiment of the present invention.

具体实施方式detailed description

为使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明实施方式作进一步地详细描述。In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

图1是本发明实施例提供的一种监测地热储层温度和裂缝分布的方法,参见图1,该方法可以包括如下几个步骤:Fig. 1 is a kind of method for monitoring geothermal reservoir temperature and fracture distribution provided by the embodiment of the present invention, referring to Fig. 1, the method may include the following steps:

步骤101:采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂。Step 101: using silicon dioxide nanoparticles to react with nitrogen to generate a threshold nano-tracer.

具体的,首先将采用二氧化硅纳米颗粒和氮气反应,生成表面附加有一个氨基的二氧化硅纳米颗粒,即将二氧化硅颗粒与氮气在高温下发生反应,进而在二氧化硅纳米颗粒的表面附加上一个氨基;然后将表面附加有一个氨基的二氧化硅纳米颗粒与氨基发生置换,生成阈值纳米示踪颗粒。Specifically, firstly, the reaction between silicon dioxide nanoparticles and nitrogen gas will be used to generate silicon dioxide nanoparticles with an amino group attached to the surface, that is, the reaction between silicon dioxide particles and nitrogen gas at high temperature, and then on the surface of silicon dioxide nanoparticles An amino group is attached; then, the silica nanoparticle with an amino group attached to the surface is replaced with the amino group to generate threshold nanometer tracer particles.

步骤102:获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量。Step 102: Obtain the maximum dilution volume of the geothermal reservoir, and calculate the quantity of nano-tracers used for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir.

具体的,可以根据公式VP=πr2hφEr计算地热储层的最大稀释体积,其中,VP为该地热储层的最大稀释体积;r为注水井与生产井间的距离;φ为注水井与生产井间的孔隙度;Er为注水井与生产井间的连通系数;获得了地热储层的最大稀释体积之后,根据公式A≥μMDLVP计算用于向该地热储层投放的纳米示踪剂的数量,其中,A为用于向该地热储层投放的纳米示踪剂的数量;μ为保障系数;MDL为仪器的最低检测极限。Specifically, the maximum dilution volume of the geothermal reservoir can be calculated according to the formula VP = πr 2 hφE r , where VP is the maximum dilution volume of the geothermal reservoir; r is the distance between the injection well and the production well; φ is the injection well. The porosity between the water well and the production well; Er is the connectivity coefficient between the water injection well and the production well; after obtaining the maximum dilution volume of the geothermal reservoir , calculate the nano The number of tracers, where A is the number of nano-tracers used to put into the geothermal reservoir; μ is the guarantee coefficient; MDL is the lowest detection limit of the instrument.

步骤103:向注水井内同时注入所述阈值纳米示踪剂和非阈值纳米示踪剂,其中,所述阈值纳米示踪剂和所述非阈值纳米示踪剂具有相同的运移规律和反应过程。Step 103: Simultaneously inject the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, wherein the threshold nano-tracer and the non-threshold nano-tracer have the same migration law and reaction process .

具体的,通过高压泵组将阈值纳米示踪剂和非阈值纳米示踪剂混入注入水中,然后将加入阈值纳米示踪剂和非阈值纳米示踪剂的注入水通过高压泵组注入该注水井内,即向该注水井内同时注入阈值纳米示踪剂和非阈值纳米示踪剂,且阈值纳米示踪剂和非阈值纳米示踪剂具有相同的运移规律和反应过程。Specifically, the threshold nano-tracer and the non-threshold nano-tracer are mixed into the injection water through the high-pressure pump group, and then the injection water added with the threshold nano-tracer and the non-threshold nano-tracer is injected into the water injection well through the high-pressure pump group , that is, the threshold nano-tracer and the non-threshold nano-tracer are simultaneously injected into the water injection well, and the threshold nano-tracer and the non-threshold nano-tracer have the same migration law and reaction process.

需要说明的是,本发明实施例对于向注水井中加入阈值纳米示踪剂和非阈值纳米示踪剂具体方法和过程,本发明实施例不做具体限定,示例的,本发明实施例的可以通过高压泵组和注水管线向注水井中同时加入阈值纳米示踪剂和非阈值纳米示踪剂。It should be noted that the embodiment of the present invention does not specifically limit the specific method and process of adding threshold nano-tracers and non-threshold nano-tracers to water injection wells. For example, the embodiments of the present invention can be The threshold nano-tracer and the non-threshold nano-tracer are simultaneously added to the water injection well through a high-pressure pump group and a water injection pipeline.

步骤104:第一预设时间阈值之后,对所述注水井进行取样检测,并根据检测结果绘制所述阈值纳米示踪剂和所述非阈值纳米示踪剂的响应曲线。Step 104: After the first preset time threshold, the water injection well is sampled and detected, and the response curves of the threshold nano-tracer and the non-threshold nano-tracer are drawn according to the detection results.

当向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂,经过第一预设时间阈值的反应之后,对注水井和生产井进行采样检测,并根据检测结果绘制阈值纳米示踪剂和非阈值纳米示踪剂的响应曲线。When the threshold nano-tracer and non-threshold nano-tracer are added to the water injection well, after the reaction of the first preset time threshold, the water injection well and the production well are sampled and detected, and the threshold nano-tracer and the threshold nano-tracer are drawn according to the detection results. Response curves for non-threshold nanotracers.

需要说明的是,第一预设时间阈值的大小可以有用户自行设置,也可以由终端默认设置,本发明实施例对此不做具体限定,示例的,本领域技术人员可以根据实际需要选择第一预设时间阈值的大小。It should be noted that the size of the first preset time threshold can be set by the user, or can be set by default by the terminal, which is not specifically limited in this embodiment of the present invention. As an example, those skilled in the art can select the first preset time threshold according to actual needs. A size of a preset time threshold.

示例的,当向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂之后,自向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂当日计算,一周之后,分别在每天的早上9:00和下午9:00对注水井和生产井进行采样,即向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂一周之后,在每天的早上9:00对注水井和生产井采样一次,然后再在每天的下午9:00对注水井和生产井采样一次。然后,当向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂两周之后,分别在每天的早上9:00对生产井和注水井采样一次。当向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂两周到测试结束之前,每天都对生产井和注水井在早上9:00采样一次。For example, after adding the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, it is calculated from the day when the threshold nano-tracer and the non-threshold nano-tracer are added to the water injection well, one week later, respectively in the morning of each day Injection wells and production wells were sampled at 9:00 and 9:00 pm, that is, injection wells and production wells were sampled at 9:00 am every day after adding threshold nanotracers and non-threshold nanotracers to injection wells for one week Samples were taken once, and then again at 9:00 pm each day for the injection and production wells. Then, two weeks after the threshold nanotracer and non-threshold nanotracer were added to the water injection well, the production well and the water injection well were sampled once every morning at 9:00, respectively. Production and injection wells were sampled once a day at 9:00 am when injection wells were dosed with threshold nanotracers and non-threshold nanotracers for two weeks until the end of the test.

需要说明的是,在向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂之前,需要先对注水井和生产井分别进行采样检测,获取注水井和生产井的原始背景样。It should be noted that before adding threshold nano-tracers and non-threshold nano-tracers to water injection wells, it is necessary to sample and detect water injection wells and production wells to obtain the original background samples of water injection wells and production wells.

在获得了注水井和生产井加入阈值纳米示踪剂和非阈值纳米示踪剂的采样数据之后,根据所获得的采样数据分别绘制阈值纳米示踪剂和非阈值纳米示踪剂的响应曲线。After obtaining the sampling data of injection wells and production wells adding threshold nano-tracers and non-threshold nano-tracers, the response curves of threshold nano-tracers and non-threshold nano-tracers were plotted according to the obtained sampling data.

示例的,根据所获得的采样数据分别绘制阈值纳米示踪剂和非阈值纳米示踪剂的响应曲线如图3所示,当然,此处仅是举例说明,并不代表本发明实施例的响应曲线局限于此。As an example, the response curves of threshold nanotracers and non-threshold nanotracers are drawn respectively according to the obtained sampling data, as shown in FIG. Curves are limited to this.

步骤105:根据所述阈值纳米示踪剂和所述非阈值纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布。Step 105: Determine the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-threshold nano-tracer, and obtain the temperature distribution of the geothermal reservoir.

具体的,首先根据导热模型计算生产井的温度降低曲线,并根据温度降低曲线确定到达临界温度所需的时间,然后根据到达临界温度所需的时间,确定地热储层的阈值温度位置,最后根据阈值纳米示踪剂和非纳米示踪剂的响应曲线,以及地热储层的阈值温度位置,获取该地热储层的温度分布。Specifically, first calculate the temperature reduction curve of the production well according to the heat conduction model, and determine the time required to reach the critical temperature according to the temperature reduction curve, and then determine the threshold temperature position of the geothermal reservoir according to the time required to reach the critical temperature, and finally according to Response curves for threshold nanotracers and non-nanotracers, as well as the threshold temperature location of the geothermal reservoir, to obtain the temperature distribution of the geothermal reservoir.

需要说明的是,示踪剂是一种测量地热储层温度数据、预测热突破的有效方法,可以用于确定有效油藏温度即平均温度值,以及油藏的整体温度分布。而纳米材料由于其对温度的高度敏感性,能够比常规反应溶质示踪剂携带更多的信息,能够使密封反应物质直到到达阈值温度时才发生反应的纳米示踪剂是进行地热储藏的温度分布监测的优选材料。阈值纳米示踪剂能实现更为精细的地热储层温度分布。It should be noted that tracers are an effective method for measuring geothermal reservoir temperature data and predicting thermal breakthrough, and can be used to determine the effective reservoir temperature, that is, the average temperature value, and the overall temperature distribution of the reservoir. Due to its high sensitivity to temperature, nanomaterials can carry more information than conventional reactive solute tracers, and nanotracers that can seal reactive substances until they reach a threshold temperature are the temperature for geothermal storage. Preferred material for distribution monitoring. Threshold nanotracers enable more refined temperature distribution of geothermal reservoirs.

阈值纳米反应示踪剂通过一次测试就能够得到油藏温度分布,其返回曲线能够用来确定反应物发生反应的时间,再通过时间反过来确定达到阈值温度的油藏位置。阈值反应示踪剂与非阈值反应示踪剂同时进行测试,所得两条返回曲线的差别就能用来确定热前缘(热锋面),进而结合这两组信息就能够揭示地热储层的温度分布。The threshold nano-reaction tracer can obtain the temperature distribution of the reservoir through one test, and its return curve can be used to determine the time when the reactant reacts, and then use the time to inversely determine the position of the reservoir that reaches the threshold temperature. Threshold-response tracers are tested simultaneously with non-threshold-response tracers, and the difference between the two return curves can be used to identify thermal fronts (thermal fronts), and combining these two sets of information can reveal the temperature of the geothermal reservoir distributed.

为了实现对地热储层温度的检测,本发明利用纳米材料对温度的高度敏感性,将阈值纳米示踪剂测试与非阈值纳米示踪剂测试的响应曲线相结合,数值反演得到最终结果。利用阈值纳米示踪剂对增强型地热储层开采过程中温度分布的实时监测,能够确定储层的水力特征、优化注采井布置、预测生产井热突破,从而保持持续有效的提取地热能。In order to realize the detection of geothermal reservoir temperature, the invention utilizes the high sensitivity of nanomaterials to temperature, combines the response curves of threshold nano-tracer test and non-threshold nano-tracer test, and numerically inverts to obtain the final result. The real-time monitoring of the temperature distribution during the extraction of enhanced geothermal reservoirs using threshold nanotracers can determine the hydraulic characteristics of the reservoir, optimize the layout of injection and production wells, and predict the thermal breakthrough of production wells, so as to maintain continuous and effective extraction of geothermal energy.

步骤106:第二预设时间阈值之后,对所述注水井周围的至少两个生产井进行取样检测,并根据检测结果确定所述至少两个生产井中所述阈值纳米示踪剂的数量。Step 106: after the second preset time threshold, perform sampling detection on at least two production wells around the water injection well, and determine the quantity of the threshold nanotracer in the at least two production wells according to the detection results.

当向注水井内加入阈值纳米示踪剂和非阈值纳米示踪剂,经过第二预设时间阈值的反应之后,对注水井和生产井进行采样检测,并根据检测结果确定至少两个生产井中阈值纳米示踪剂的数量。When a threshold nanotracer and a non-threshold nanotracer are added to the water injection well, after the reaction of the second preset time threshold, the water injection well and the production well are sampled and detected, and the thresholds in at least two production wells are determined according to the detection results Number of nanotracers.

需要说明的是,第二预设时间阈值的大小可以有用户自行设置,也可以由终端默认设置,本发明实施例对此不做具体限定,示例的,本领域技术人员可以根据实际需要选择第二预设时间阈值的大小。It should be noted that the size of the second preset time threshold can be set by the user, or can be set by default by the terminal, which is not specifically limited in this embodiment of the present invention. For example, those skilled in the art can select the second preset time threshold according to actual needs. 2. The size of the preset time threshold.

其次需要说明的是,基于裂隙介质溶质运移模型,假设在一眼注水井中以稳定流量注入阈值纳米示踪剂和非阈值纳米示踪剂,在附近的一眼生产井以稳定的流量开采,并假设注入水沿着一条通道(如裂隙带)从注入井向生产井流动,且在通道中的流动是一维的。忽略分子扩散的作用,假设一定量的阈值纳米示踪剂和非阈值纳米示踪剂被一次性投人注入井中,其中一部分沿着通道向生产井运移,考虑示踪剂的质量守恒,可以得出裂隙出口示踪剂浓度的表达式为其中,C为裂隙出口示踪剂浓度,A为裂隙通道的截面积,为裂隙通道的孔隙度,Mr为流人裂隙通道的示踪剂量,L为注入井和生产井之间裂隙通道的长度,D为弥散系数,u为注入水在裂隙中的运动速度,t为时间,ρ为回灌水的密度。Secondly, it should be explained that, based on the solute transport model in fractured media, it is assumed that threshold nanotracers and non-threshold nanotracers are injected at a steady flow rate in one injection well, and that a nearby production well is produced at a stable flow rate, and It is assumed that the injected water flows from the injection well to the production well along a channel (such as a fractured zone), and the flow in the channel is one-dimensional. Neglecting the effect of molecular diffusion, assuming that a certain amount of threshold nano-tracer and non-threshold nano-tracer is injected into the injection well at one time, a part of which migrates along the channel to the production well, considering the mass conservation of the tracer, it can be The expression of the tracer concentration at the fracture exit is obtained as Among them, C is the tracer concentration at the fracture outlet, A is the cross-sectional area of the fracture channel, is the porosity of the fracture channel, Mr is the tracer dose flowing into the fracture channel, L is the length of the fracture channel between the injection well and the production well, D is the diffusion coefficient, u is the movement speed of the injected water in the fracture, t is the time, and ρ is the density of the recharge water.

如果有n条连接注水井和生产井的裂缝通道,则生产井的示踪剂浓度为:其中,Di=αiui式中:q是单位时间流向裂隙通道的注水量,Q是生产井在示踪试验期间的流量,αL是裂隙的纵向弥散度,qin是注入井在示踪剂试验期间的注入量;M是示踪剂投放总量;Mi是流经通道i的示踪剂量。If there are n fracture channels connecting the injection well and the production well, the tracer concentration of the production well is: in, D ii u i , In the formula: q is the amount of water injected into the fracture channel per unit time, Q is the flow rate of the production well during the tracer test, α L is the longitudinal dispersion of the fracture, and q in is the injection rate of the injection well during the tracer test; M is the total amount of tracer administered; M i is the tracer dose flowing through channel i.

步骤107:根据所述至少两个生产井中所述阈值纳米示踪剂的数量确定所述地热储层裂缝分布。Step 107: Determine the fracture distribution of the geothermal reservoir according to the quantity of the threshold nanotracer in the at least two production wells.

具体的,可以通过计算机程序TRINV来对检测到的生产井中的阈值纳米示踪剂的数量进行拟合分析,然后得到纳米示踪剂注入注水井之后的示踪剂的渗透流速雷达图,其中,纳米示踪剂在注水井和生产井之间的渗透流速与裂缝的大小和分布情况成正比。Specifically, the computer program TRINV can be used to perform fitting analysis on the detected threshold nano-tracer quantity in the production well, and then obtain the permeation velocity radar map of the tracer after the nano-tracer is injected into the water injection well, wherein, The permeation flow rate of nanotracers between injection wells and production wells is proportional to the size and distribution of fractures.

需要说明的是,本发明实施例对于选取的注入井附近的生产井的数量不做具体限定,优选的,选取的注入井附近的生产井的数量越多分析到的地热储层的裂缝分布情况更加真实。It should be noted that the embodiment of the present invention does not specifically limit the number of production wells near the selected injection wells. Preferably, the more the number of production wells near the selected injection wells, the more the fracture distribution of the geothermal reservoir analyzed. more realistic.

示例的,本发明实施例的渗透流速雷达图如图4所示,参考图4所示,图中阴影部分的大小代表纳米示踪剂在注水井和生产井之间的渗透流速的大小,其中,参考图4可以看出,靠近注水井的地方纳米示踪剂的渗透流速越大,并且可以看出注水井和生产井之间的裂缝的越大,纳米示踪剂在注水井和生产井之间的渗透流速越大。Illustratively, the permeation flow rate radar map of the embodiment of the present invention is shown in Figure 4, with reference to Figure 4, the size of the shaded part in the figure represents the size of the permeation flow rate of the nano-tracer between the water injection well and the production well, where , referring to Figure 4, it can be seen that the permeation flow rate of the nano-tracer near the water injection well is greater, and it can be seen that the fracture between the water injection well and the production well is larger, and the nano-tracer in the water injection well and the production well The greater the permeation flow rate between.

本发明实施例提供的方法,首先采用二氧化硅纳米颗粒和氮气反应,制作阈值纳米示踪剂,然后根据地热储层的最大稀释体积计算用于向该地热储层投放的纳米示踪剂的数量,进而向注水井内同时注入阈值纳米示踪剂和非阈值纳米示踪剂,其中,阈值纳米示踪剂和非阈值纳米示踪剂具有相同的运移规律和反应过程;第一预设时间阈值之后,对注水井进行取样检测,并根据检测结果绘制阈值纳米示踪剂和非纳米示踪剂的响应曲线,然后根据阈值纳米示踪剂和非纳米示踪剂的响应曲线,确定地热储层的阈值温度位置,并获取地热储层的温度分布;第二预设时间阈值之后,对注水井周围的至少两个生产井进行取样检测,并根据检测结果确定至少两个生产井中阈值纳米示踪剂的数量,然后根据至少两个生产井中阈值纳米示踪剂的数量确定地热储层裂缝分布。本发明实施例提供的方法,通过纳米示踪剂进行一次测量就能够得到地热储层的温度分布,其返回曲线能够用来确定阈值纳米示踪剂发生反应的时间,然后再通过时间反过来确定地热储层的阈值温度位置,最后结合阈值纳米示踪剂和非纳米示踪剂的响应曲线,确定地热储层的温度分布,最后根据至少两个生产井中阈值纳米示踪剂的数量确定地热储层裂缝分布,实现了地热储层的温度分布和裂缝分布的真实监测,同时还可以实现地热储层温度和裂缝分布情况的反复测量。In the method provided by the embodiment of the present invention, firstly, silicon dioxide nanoparticles and nitrogen are used to react to produce a threshold nano-tracer, and then the nano-tracer used to inject the geothermal reservoir is calculated according to the maximum dilution volume of the geothermal reservoir. Quantity, and then simultaneously inject threshold nano-tracer and non-threshold nano-tracer into the water injection well, wherein, threshold nano-tracer and non-threshold nano-tracer have the same migration law and reaction process; the first preset time After the threshold, the water injection well is sampled and detected, and the response curves of the threshold nano-tracer and non-nano-tracer are drawn according to the detection results, and then the geothermal storage capacity is determined according to the response curve of the threshold nano-tracer and non-nano-tracer. The threshold temperature position of the reservoir, and obtain the temperature distribution of the geothermal reservoir; after the second preset time threshold, at least two production wells around the water injection well are sampled and detected, and the threshold nanometer display in at least two production wells is determined according to the detection results The number of tracers in the geothermal reservoir is then determined based on the number of threshold nanotracers in at least two production wells. According to the method provided by the embodiment of the present invention, the temperature distribution of the geothermal reservoir can be obtained by one measurement of the nano-tracer, and its return curve can be used to determine the time when the threshold nano-tracer reacts, and then reversely determined by time The threshold temperature location of the geothermal reservoir, and finally the temperature distribution of the geothermal reservoir is determined by combining the response curves of threshold nanotracers and non-nanotracers, and finally the geothermal reservoir is determined based on the number of threshold nanotracers in at least two production wells It realizes the real monitoring of the temperature distribution and fracture distribution of the geothermal reservoir, and can also realize the repeated measurement of the temperature and fracture distribution of the geothermal reservoir.

图2是本发明实施例提供的监测地热储层温度和裂缝分布的装置的结构示意图,参见图2,该装置可以包括:Fig. 2 is a structural schematic diagram of a device for monitoring geothermal reservoir temperature and fracture distribution provided by an embodiment of the present invention. Referring to Fig. 2, the device may include:

第一处理模块210,用于采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂;The first processing module 210 is used to react with silicon dioxide nanoparticles and nitrogen to generate a threshold nano-tracer;

第一获取模块220,用于获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量;The first acquisition module 220 is configured to acquire the maximum dilution volume of the geothermal reservoir, and calculate the quantity of nanotracers used for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir;

第二处理模块230,用于向注水井内同时注入所述阈值纳米示踪剂和非阈值纳米示踪剂,其中,所述阈值纳米示踪剂和所述非阈值纳米示踪剂具有相同的运移规律和反应过程;The second processing module 230 is configured to simultaneously inject the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, wherein the threshold nano-tracer and the non-threshold nano-tracer have the same motion Shift rules and reaction processes;

第三处理模块240,用于在第一预设时间阈值之后,对所述注水井进行取样检测,并根据检测结果绘制所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线;The third processing module 240 is configured to perform sampling detection on the water injection well after the first preset time threshold, and draw response curves of the threshold nano-tracer and the non-nano-tracer according to the detection result;

第一确定模块250,用于根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布;The first determination module 250 is configured to determine the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-nano-tracer, and obtain the temperature distribution of the geothermal reservoir;

第四处理模块260,用于在第二预设时间阈值之后,对所述注水井周围的至少两个生产井进行取样检测,并根据检测结果确定所述至少两个生产井中所述阈值纳米示踪剂的数量;The fourth processing module 260 is configured to perform sampling detection on at least two production wells around the water injection well after the second preset time threshold, and determine the threshold in nanometers in the at least two production wells according to the detection results. amount of tracer;

第二确定模块270,用于根据所述至少两个生产井中所述阈值纳米示踪剂的数量确定所述地热储层裂缝分布。The second determination module 270 is configured to determine the distribution of fractures in the geothermal reservoir according to the quantity of the threshold nano-tracer in the at least two production wells.

可选的,第一处理模块210具体用于:Optionally, the first processing module 210 is specifically configured to:

二氧化硅纳米颗粒与氮气在高温下反应,生成表面附加有一个氨基的二氧化硅纳米颗粒;Silica nanoparticles react with nitrogen at high temperature to produce silica nanoparticles with an amino group attached to the surface;

将所述表面附加有一个氨基的二氧化硅纳米颗粒与所述氨基发生置换,生成阈值纳米示踪颗粒。The silicon dioxide nanoparticle with an amino group attached to the surface is replaced with the amino group to generate threshold nanometer tracer particles.

可选的,第一获取模块220具体用于:Optionally, the first acquiring module 220 is specifically used for:

根据公式VP=πr2hφEr计算所述地热储层的最大稀释体积,其中,VP为所述地热储层的最大稀释体积;r为注水井与生产井间的距离;φ为注水井与生产井间的孔隙度;Er为注水井与生产井间的连通系数;Calculate the maximum dilution volume of the geothermal reservoir according to the formula V P = πr 2 hφE r , where V P is the maximum dilution volume of the geothermal reservoir; r is the distance between the water injection well and the production well; φ is the water injection well The porosity between the injection well and the production well; E r is the connectivity coefficient between the injection well and the production well;

根据公式A≥μMDLVP计算用于向所述地热储层投放的纳米示踪剂的数量,其中,A为用于向所述地热储层投放的纳米示踪剂的数量;μ为保障系数;MDL为仪器的最低检测极限。Calculate the quantity of the nano-tracer used to put into the geothermal reservoir according to the formula A≥μM LV P , wherein A is the quantity of the nano-tracer used to put into the geothermal reservoir; μ is the guarantee factor; MDL is the lowest detection limit of the instrument.

可选的,第一确定模块250具体用于:Optionally, the first determination module 250 is specifically configured to:

根据导热模型计算生产井的温度降低曲线,并根据所述温度降低曲线确定到达临界温度所需的时间;Calculate the temperature reduction curve of the production well according to the heat conduction model, and determine the time required to reach the critical temperature according to the temperature reduction curve;

根据到达临界温度所需的时间,确定所述地热储层的阈值温度位置;Determine the threshold temperature position of the geothermal reservoir according to the time required to reach the critical temperature;

根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,和所述地热储层的阈值温度位置,获取所述地热储层的温度分布。According to the response curves of the threshold nano-tracer and the non-nano-tracer, and the threshold temperature position of the geothermal reservoir, the temperature distribution of the geothermal reservoir is obtained.

需要说明的是:上述实施例提供的一种监测地热储层温度和裂缝分布的装置在进行监测地热储层温度和裂缝分布的检测时,仅以上述各功能模块的划分进行举例说明,实际应用中,可以根据需要而将上述功能分配由不同的功能模块完成,即将设备的内部结构划分成不同的功能模块,以完成以上描述的全部或者部分功能。另外,上述实施例提供的监测地热储层温度和裂缝分布的装置与监测地热储层温度和裂缝分布的方法实施例属于同一构思,其具体实现过程详见方法实施例,这里不再赘述。It should be noted that when the device for monitoring the temperature of the geothermal reservoir and the distribution of fractures provided by the above-mentioned embodiment is used for the detection of the temperature of the geothermal reservoir and the distribution of fractures, the division of the above-mentioned functional modules is used as an example for illustration. In , the above function allocation can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the device for monitoring geothermal reservoir temperature and fracture distribution provided by the above embodiment and the method embodiment for monitoring geothermal reservoir temperature and fracture distribution belong to the same concept, and its specific implementation process is detailed in the method embodiment, and will not be repeated here.

上述本发明实施例序号仅仅为了描述,不代表实施例的优劣。The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成,也可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,上述提到的存储介质可以是只读存储器,磁盘或光盘等。Those of ordinary skill in the art can understand that all or part of the steps for implementing the above embodiments can be completed by hardware, and can also be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium. The above-mentioned The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, and the like.

以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (8)

1.一种监测地热储层温度和裂缝分布的方法,其特征在于,所述方法包括:1. A method for monitoring geothermal reservoir temperature and fracture distribution, characterized in that the method comprises: 采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂;Using silica nanoparticles to react with nitrogen to generate threshold nanotracers; 获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量;Obtaining the maximum dilution volume of the geothermal reservoir, and calculating the quantity of nanotracers used for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir; 向注水井内同时注入所述阈值纳米示踪剂和非阈值纳米示踪剂,其中,所述阈值纳米示踪剂和所述非阈值纳米示踪剂具有相同的运移规律和反应过程;Simultaneously injecting the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, wherein the threshold nano-tracer and the non-threshold nano-tracer have the same migration law and reaction process; 第一预设时间阈值之后,对所述注水井进行取样检测,并根据检测结果绘制所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线;After the first preset time threshold, the water injection well is sampled and detected, and the response curves of the threshold nanotracer and the non-nanometer tracer are drawn according to the detection results; 根据所述阈值纳米示踪剂和所述非阈值纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布;determining the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-threshold nano-tracer, and obtaining the temperature distribution of the geothermal reservoir; 第二预设时间阈值之后,对所述注水井周围的至少两个生产井进行取样检测,并根据检测结果确定所述至少两个生产井中所述阈值纳米示踪剂的数量;After the second preset time threshold, at least two production wells around the water injection well are sampled and detected, and the quantity of the threshold nanotracer in the at least two production wells is determined according to the detection results; 根据所述至少两个生产井中所述阈值纳米示踪剂的数量确定所述地热储层裂缝分布。The geothermal reservoir fracture distribution is determined based on the threshold nanotracer quantity in the at least two production wells. 2.根据权利要求1所述的方法,其特征在于,所述采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂,包括:2. method according to claim 1, is characterized in that, described employing silicon dioxide nanoparticle and nitrogen reaction, generates threshold value nano-tracer, comprising: 二氧化硅纳米颗粒与氮气在高温下反应,生成表面附加有一个氨基的二氧化硅纳米颗粒;Silica nanoparticles react with nitrogen at high temperature to produce silica nanoparticles with an amino group attached to the surface; 将所述表面附加有一个氨基的二氧化硅纳米颗粒与所述氨基发生置换,生成阈值纳米示踪颗粒。The silicon dioxide nanoparticle with an amino group attached to the surface is replaced with the amino group to generate threshold nanometer tracer particles. 3.根据权利要求1所述的方法,其特征在于,所述获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量,包括:3. The method according to claim 1, characterized in that, the acquisition of the maximum dilution volume of the geothermal reservoir, and calculation of the maximum dilution volume used to inject the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir Quantity of nanotracers, including: 根据公式VP=πr2hφEr计算所述地热储层的最大稀释体积,其中,VP为所述地热储层的最大稀释体积;r为注水井与生产井间的距离;φ为注水井与生产井间的孔隙度;Er为注水井与生产井间的连通系数;Calculate the maximum dilution volume of the geothermal reservoir according to the formula V P = πr 2 hφE r , where V P is the maximum dilution volume of the geothermal reservoir; r is the distance between the water injection well and the production well; φ is the water injection well The porosity between the injection well and the production well; E r is the connectivity coefficient between the injection well and the production well; 根据公式A≥μMDLVP计算用于向所述地热储层投放的纳米示踪剂的数量,其中,A为用于向所述地热储层投放的纳米示踪剂的数量;μ为保障系数;MDL为仪器的最低检测极限。Calculate the quantity of the nano-tracer used to put into the geothermal reservoir according to the formula A≥μM LV P , wherein A is the quantity of the nano-tracer used to put into the geothermal reservoir; μ is the guarantee factor; MDL is the lowest detection limit of the instrument. 4.根据权利要求1所述的方法,其特征在于,所述根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布,包括:4. method according to claim 1, is characterized in that, described according to the response curve of described threshold nano tracer and described non-nano tracer, determine the threshold temperature position of described geothermal reservoir, and obtain The temperature distribution of the geothermal reservoir comprises: 根据导热模型计算生产井的温度降低曲线,并根据所述温度降低曲线确定到达临界温度所需的时间;Calculate the temperature reduction curve of the production well according to the heat conduction model, and determine the time required to reach the critical temperature according to the temperature reduction curve; 根据到达临界温度所需的时间,确定所述地热储层的阈值温度位置;Determine the threshold temperature position of the geothermal reservoir according to the time required to reach the critical temperature; 根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,和所述地热储层的阈值温度位置,获取所述地热储层的温度分布。According to the response curves of the threshold nano-tracer and the non-nano-tracer, and the threshold temperature position of the geothermal reservoir, the temperature distribution of the geothermal reservoir is obtained. 5.一种监测地热储层温度和裂缝分布的装置,其特征在于,所述装置包括:5. A device for monitoring geothermal reservoir temperature and fracture distribution, characterized in that the device comprises: 第一处理模块,用于采用二氧化硅纳米颗粒和氮气反应,生成阈值纳米示踪剂;The first processing module is used to react with silicon dioxide nanoparticles and nitrogen to generate a threshold nanotracer; 第一获取模块,用于获取所述地热储层的最大稀释体积,并根据所述地热储层的最大稀释体积计算用于向所述地热储层投放的纳米示踪剂的数量;The first acquisition module is used to acquire the maximum dilution volume of the geothermal reservoir, and calculate the quantity of nano-tracers used for injecting into the geothermal reservoir according to the maximum dilution volume of the geothermal reservoir; 第二处理模块,用于向注水井内同时注入所述阈值纳米示踪剂和非阈值纳米示踪剂,其中,所述阈值纳米示踪剂和所述非阈值纳米示踪剂具有相同的运移规律和反应过程;The second processing module is used to simultaneously inject the threshold nano-tracer and the non-threshold nano-tracer into the water injection well, wherein the threshold nano-tracer and the non-threshold nano-tracer have the same migration Laws and reaction processes; 第三处理模块,用于在第一预设时间阈值之后,对所述注水井进行取样检测,并根据检测结果绘制所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线;The third processing module is used to sample and detect the water injection well after the first preset time threshold, and draw the response curve of the threshold nanotracer and the non-nanometer tracer according to the detection result; 第一确定模块,用于根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,确定所述地热储层的阈值温度位置,并获取所述地热储层的温度分布;The first determination module is used to determine the threshold temperature position of the geothermal reservoir according to the response curves of the threshold nano-tracer and the non-nano-tracer, and obtain the temperature distribution of the geothermal reservoir; 第四处理模块,用于在第二预设时间阈值之后,对所述注水井周围的至少两个生产井进行取样检测,并根据检测结果确定所述至少两个生产井中所述阈值纳米示踪剂的数量;The fourth processing module is configured to perform sampling detection on at least two production wells around the water injection well after the second preset time threshold, and determine the threshold nano-trace in the at least two production wells according to the detection results the amount of the dose; 第二确定模块,用于根据所述至少两个生产井中所述阈值纳米示踪剂的数量确定所述地热储层裂缝分布。A second determining module, configured to determine the fracture distribution of the geothermal reservoir according to the quantity of the threshold nano-tracer in the at least two production wells. 6.根据权利要求5所述的装置,其特征在于,所述第一处理模块具体用于:6. The device according to claim 5, wherein the first processing module is specifically used for: 二氧化硅纳米颗粒与氮气在高温下反应,生成表面附加有一个氨基的二氧化硅纳米颗粒;Silica nanoparticles react with nitrogen at high temperature to produce silica nanoparticles with an amino group attached to the surface; 将所述表面附加有一个氨基的二氧化硅纳米颗粒与所述氨基发生置换,生成阈值纳米示踪颗粒。The silicon dioxide nanoparticle with an amino group attached to the surface is replaced with the amino group to generate threshold nanometer tracer particles. 7.根据权利要求5所述的装置,其特征在于,所述第一获取模块具体用于:7. The device according to claim 5, wherein the first acquiring module is specifically used for: 根据公式VP=πr2hφEr计算所述地热储层的最大稀释体积,其中,VP为所述地热储层的最大稀释体积;r为注水井与生产井间的距离;φ为注水井与生产井间的孔隙度;Er为注水井与生产井间的连通系数;Calculate the maximum dilution volume of the geothermal reservoir according to the formula V P = πr 2 hφE r , where V P is the maximum dilution volume of the geothermal reservoir; r is the distance between the water injection well and the production well; φ is the water injection well The porosity between the injection well and the production well; E r is the connectivity coefficient between the injection well and the production well; 根据公式A≥μMDLVP计算用于向所述地热储层投放的纳米示踪剂的数量,其中,A为用于向所述地热储层投放的纳米示踪剂的数量;μ为保障系数;MDL为仪器的最低检测极限。Calculate the quantity of the nano-tracer used to put into the geothermal reservoir according to the formula A≥μM LV P , wherein A is the quantity of the nano-tracer used to put into the geothermal reservoir; μ is the guarantee factor; MDL is the lowest detection limit of the instrument. 8.根据权利要求1所述的方法,其特征在于,所述第一确定模块具体用于:8. The method according to claim 1, wherein the first determination module is specifically used for: 根据导热模型计算生产井的温度降低曲线,并根据所述温度降低曲线确定到达临界温度所需的时间;Calculate the temperature reduction curve of the production well according to the heat conduction model, and determine the time required to reach the critical temperature according to the temperature reduction curve; 根据到达临界温度所需的时间,确定所述地热储层的阈值温度位置;Determine the threshold temperature position of the geothermal reservoir according to the time required to reach the critical temperature; 根据所述阈值纳米示踪剂和所述非纳米示踪剂的响应曲线,和所述地热储层的阈值温度位置,获取所述地热储层的温度分布。According to the response curves of the threshold nano-tracer and the non-nano-tracer, and the threshold temperature position of the geothermal reservoir, the temperature distribution of the geothermal reservoir is obtained.
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