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公开(公告)号：US10344576B1
公开(公告)日：2019-07-09
申请号：US16215255
申请日：2018-12-10
发明人： Jian Hou , Yongge Liu , Kang Zhou , Qingjun Du , Yajie Bai , Yunkai Ji , Nu Lu , Wenbin Wang
摘要： The example of implementation of the invention provides a method used for exploiting a natural gas hydrate reservoir and belongs to the field of natural gas hydrate reservoir exploitation. The method mainly comprises a heat-injecting vertical well and a production horizontal well. The production horizontal well is opened in a segmental manner. In combination with natural gas hydrate heat exploitation, heat flow injected into the vertical well is enabled to heat different positions of the natural gas hydrate reservoir to increase a recovery ratio of the natural gas hydrate reservoir. The method specifically comprises the steps of injecting a heat flow into the natural gas hydrate reservoir by utilizing the vertical well to promote decomposition of the hydrate; firstly opening a horizontal branch of the horizontal well fully and keeping depressurization exploitation. When gas production amount is reduced to a certain degree, dividing a segmentation number based on permeability of the natural gas hydrate reservoir and performing segmental exploitation on the horizontal branch from a toe end to a heel end to realize heat exploitation of the heterogeneous natural gas hydrate reservoir. The method makes full use of a horizontal well structure, reduces exploitation cost and provides effective measures for efficient exploitation of the heterogeneous natural gas hydrate reservoirs.
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公开(公告)号：US20220307356A1
公开(公告)日：2022-09-29
申请号：US17219132
申请日：2021-03-31
发明人： Jian Hou , Kang Zhou , Qingjun Du , Yongge Liu , Yueliang Liu , Bei Wei , Dong Zhao , Zhibin An , Dejun Wu
摘要： A method for realizing balanced displacement of crude oil by injection and production optimization coordinated chemical flooding which comprises the following steps: determining the median size and elastic modulus of viscoelastic particles according to the average permeability of the reservoir; optimizing the concentration ratio of the total concentration of the chemical agent; the physical parameters of each layer are counted, and the hierarchical system is combined according to the entropy weight algorithm and the cluster analysis method based on the gravity center method; the optimal section slug volume ratio of the single well injected with two slugs under the heterogeneity of the permeability of the strata is calculated; and the objective function is established by combining the coefficient of variation of remaining oil saturation, the effect of chemical flooding and the cost, and the numerical simulator is used to optimize the objective function.
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公开(公告)号：US12055022B2
公开(公告)日：2024-08-06
申请号：US17219132
申请日：2021-03-31
发明人： Jian Hou , Kang Zhou , Qingjun Du , Yongge Liu , Yueliang Liu , Bei Wei , Dong Zhao , Zhibin An , Dejun Wu
摘要： A method for realizing balanced displacement of crude oil by injection and production optimization coordinated chemical flooding which comprises the following steps: determining the median size and elastic modulus of viscoelastic particles according to the average permeability of the reservoir; optimizing the concentration ratio of the total concentration of the chemical agent; the physical parameters of each layer are counted, and the hierarchical system is combined according to the entropy weight algorithm and the cluster analysis method based on the gravity center method; the optimal section slug volume ratio of the single well injected with two slugs under the heterogeneity of the permeability of the strata is calculated; and the objective function is established by combining the coefficient of variation of remaining oil saturation, the effect of chemical flooding and the cost, and the numerical simulator is used to optimize the objective function.
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4.发明授权公开(公告)号：US10371859B2
公开(公告)日：2019-08-06
申请号：US15989861
申请日：2018-05-25
发明人： Jian Hou , Kang Zhou , Yongge Liu , Qingjun Du , Bo Yu
摘要： Disclosed is a method for simulation of a microscopic flow of pre-crosslinked gel suspension liquid in a porous medium, including the steps of: establishing a simulation area of the porous medium based on a two-dimensional core CT slice image and subjecting the simulation area to numerical grid discretization; setting initial position and original shape of pre-crosslinked gel particles to generate virtual boundary mark points; marking the type of numeric grid nodes; calculating the force of the fluid on each virtual boundary mark point according to the momentum change of the numerical grid nodes on the boundary of the pre-crosslinked gel particles; calculating the contact force on each virtual boundary mark point using a particle contact action model; calculating the bending recovery force and the stretching recovery force for each virtual boundary mark point based on the current shape and original shape of the pre-crosslinked gel particles; and calculating the velocity and displacement of each virtual boundary mark point based on Newton's second law, wherein the respective virtual boundary mark points are connected to obtain the overall shape and position of the pre-crosslinked gel particles.
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5.发明公开公开(公告)号：US20240200431A1
公开(公告)日：2024-06-20
申请号：US18418301
申请日：2024-01-21
发明人： Jian Hou , Kang Zhou , Shuai Liu , Zhibin An , Qingjun Du , Bei Wei , Yongge Liu
IPC分类号： E21B43/20 , G06F30/20 , G06F111/10
CPC分类号： E21B43/20 , G06F30/20 , G06F2111/10
摘要： A method and system for predicting water flooding recovery of fault block reservoirs considering a whole process optimization includes: determining influencing factors in water flooding recovery of fault block reservoirs; screening master parameters of the water flooding recovery of the fault block reservoirs; determining a single-factor correlation between the water flooding recovery of the fault block reservoirs and the master parameters; designing multi-factor orthogonal experimental schemes; performing a whole-process water flooding optimization for each of the experimental schemes including separate-layer injection and production, well-type conversion, and injection and production adjustment, to obtain the maximum water flooding recovery; and determining a prediction model of the water flooding recovery of the fault block reservoirs using least square method based on results of the whole process optimization of orthogonal experiments, further obtaining a prediction model of the water flooding recovery of the fault block reservoirs.
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6.发明公开公开(公告)号：US20240141766A1
公开(公告)日：2024-05-02
申请号：US18057685
申请日：2022-11-21
发明人： Jian Hou , Kang Zhou , Zhinbin An , Qingjun Du , Yongge Liu , Bei Wei , Dejun Wu , Shuai Liu
IPC分类号： E21B43/16
CPC分类号： E21B43/16 , E21B2200/20
摘要： A bidirectional self-regulating chemical flooding method and system for enhancing oil recovery includes: determining the average particle size of dispersed phase droplets under stable seepage flow of an oil-in-water emulsion according to the average reservoir permeability; determining injection concentration of an emulsifier which matches a target reservoir according to reservoir seepage velocity; under a condition of keeping the injection concentration of the emulsifier constant, determining the optimal injection concentration of a polymer which matches the injection concentration of the emulsifier through core flooding experiments with the maximum equivalent ton oil accumulation as a target; determining total injection amount of the emulsifier and total injection amount of the polymer for implementing well group units; and optimizing injection amount of the emulsifier and the polymer in each single well by using a numerical simulator of a chemical flooding reservoir.
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公开(公告)号：US11912932B1
公开(公告)日：2024-02-27
申请号：US18338816
申请日：2023-06-21
发明人： Jian Hou , Bei Wei , Yongsheng Liu , Kang Zhou , Qingjun Du , Yongge Liu
摘要： An encapsulated polymer flooding method and system for enhancing oil recovery includes: (1) determining reservoir parameters, a well deployment, and a development dynamic state of a target oil reservoir; (2) determining a near-wellbore targeted profile control area and a far-wellbore targeted viscosification area; (3) designing and synthesizing an encapsulated polymer according to conditions of the target oil reservoir; (4) evaluating and determining whether the anti-shearing performance, the sustained release and viscosification performance, the injection performance, and the profile control performance of the encapsulated polymer meet expected performance requirements based on laboratory tests; (5) formulating an injection scheme for an encapsulated polymer flooding field; and (6) monitoring the development dynamic state of the oil reservoir; according to the present disclosure, the polymer is wrapped with a shell layer, which greatly reduces the shear degradation during injection of the polymer and effectively reduces the cost.
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8.发明公开公开(公告)号：US20240183270A1
公开(公告)日：2024-06-06
申请号：US18338767
申请日：2023-07-28
发明人： Jian Hou , Bei Wei , Yongsheng Liu , Kang Zhou , Qingjun Du , Yongge Liu , Ermeng Zhao , Dejun Wu
CPC分类号： E21B49/008 , B01L3/502715 , B01L3/502746 , B01L2200/143
摘要： A gel particle-containing discontinuous phase seepage experimental apparatus includes a micro-liquid volume injection system, a pressure acquisition and transmission system, a microscopic observation system, and an in-microchannel particle screening and transfer system. According to the established discontinuous phase seepage experimental apparatus, particle sizes of gel particles are accurately screened by using a customized microfluidic chip, and transfer forms, existing states, pressure fluctuations, and the like of gel particles in a single-channel microfluidic chip under the conditions of different sizes, different elastic modulus, and different quantities are monitored in real-time by using a high-precision pressure sensing system and a microscopic observation system.
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9.发明公开公开(公告)号：US20240152672A1
公开(公告)日：2024-05-09
申请号：US18067793
申请日：2022-12-19
发明人： Jian Hou , Kang Zhou , Shuai Liu , Zhibin An , Qingjun Du , Bei Wei , Yongge Liu
IPC分类号： G06F30/28
CPC分类号： G06F30/28
摘要： A method and system for predicting water flooding recovery of fault block reservoirs considering a whole process optimization includes: determining influencing factors in water flooding recovery of fault block reservoirs; screening master parameters of the water flooding recovery of the fault block reservoirs; determining a single-factor correlation between the water flooding recovery of the fault block reservoirs and the master parameters; designing multi-factor orthogonal experimental schemes; performing a whole-process water flooding optimization for each of the experimental schemes including separate-layer injection and production, well-type conversion, and injection and production adjustment, to obtain the maximum water flooding recovery; and determining a prediction model of the water flooding recovery of the fault block reservoirs using least square method based on results of the whole process optimization of orthogonal experiments, further obtaining a prediction model of the water flooding recovery of the fault block reservoirs.
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公开(公告)号：US10969514B1
公开(公告)日：2021-04-06
申请号：US17015896
申请日：2020-09-09
发明人： Jian Hou , Yunkai Ji , Qingjun Du , Yongge Liu , Kang Zhou , Yueliang Liu , Bei Wei , Ermeng Zhao , Nu Lu , Yajie Bai
IPC分类号： G01V3/38 , G01V3/32 , G06F30/28 , G01V99/00 , G06F113/08
摘要： The application relates to the technical field of oil and gas field development, and discloses a correction method and system for a permeability model considering gas hydrate distribution, and a method and system for determining the permeability of the hydrate-bearing porous medium. The correction method includes: calculating a water mass and a hydrate saturation of each subregion of a porous medium in a dissociation process of a gas hydrate; calculating an average permeability of the porous medium in the dissociation process of the gas hydrate according to the hydrate saturation and a permeability model, wherein a value of a permeability characteristic parameter in the permeability model is an initial value of the permeability characteristic parameter; and determining the initial value of the permeability characteristic parameter as an optimal value of the permeability characteristic parameter under a condition that an difference between the average permeability of the porous medium and an actually measured permeability in the dissociation process of the gas hydrate is less than or equal to a preset value. In the application, through the corrected permeability model, the permeability characteristics of the porous medium considering the heterogeneous distribution of the hydrate can be accurately measured.
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