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132 results about "Reservoir engineering" patented technology

Reservoir engineering is a branch of petroleum engineering that applies scientific principles to the fluid flow through porous medium during the development and production of oil and gas reservoirs so as to obtain a high economic recovery. The working tools of the reservoir engineer are subsurface geology, applied mathematics, and the basic laws of physics and chemistry governing the behavior of liquid and vapor phases of crude oil, natural gas, and water in reservoir rock. Of particular interest to reservoir engineers is generating accurate reserves estimates for use in financial reporting to the SEC and other regulatory bodies. Other job responsibilities include numerical reservoir modeling, production forecasting, well testing, well drilling and workover planning, economic modeling, and PVT analysis of reservoir fluids. Reservoir engineers also play a central role in field development planning, recommending appropriate and cost effective reservoir depletion schemes such as waterflooding or gas injection to maximize hydrocarbon recovery. Due to legislative changes in many hydrocarbon producing countries, they are also involved in the design and implementation of carbon sequestration projects in order to minimise the emission of greenhouse gases.

Three-dimensional injection-production well pattern construction method based on multi-objective algorithm

The invention belongs to the technical field of oil and gas reservoir energy development, and discloses a three-dimensional injection and production well pattern construction method based on a multi-objective algorithm. The problem that the delimited potential area is difficult to effectively use due to the fact that existing potential evaluation is only based on a single index is effectively solved. Comprising the steps that a fault inner core, a fault outer core, a fracture development dense zone and a secondary fracture zone are proposed; carrying out inter-well connectivity analysis on the oil reservoir units by utilizing an oil reservoir engineering method and a numerical simulation streamline method; based on the embedded discrete fracture model, analyzing a remaining oil distribution mode under the control of the nuclear band structure; a multi-parameter comprehensive evaluation system is constructed by combining the remaining oil utilization potential, the displacement power, the flow capacity, the connectivity relation and the reserve abundance; a three-dimensional injection-production well pattern construction technology is formed for an oil reservoir with or without bottom water; based on a multi-objective optimization algorithm, three-dimensional collaborative optimization of the recovery ratio, the well control reserves and the net present value is taken as a core, and a high-efficiency well location deployment technology for different fault zones is constructed.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Self-adaptive fine tuning method and system for operating parameters of oil and gas equipment

The invention relates to the technical field of oil and gas equipment operation control, in particular to an oil and gas equipment operation parameter self-adaptive fine tuning method and system, and the method comprises the steps: constructing an operation parameter optimization library driven by reinforcement learning, defining an action space containing equipment types, working condition modes and key parameter combinations, predicting accuracy, response efficiency and safety compliance are optimized in combination with a multi-target reward function, an optimized instruction set is generated, safety perception mixing precision fine adjustment is carried out in parallel, calculation precision is configured in a layered mode, errors are monitored in real time, a high-precision mode is switched if the precision exceeds the limit, and a reservoir engineering equation mechanism constraint matrix is embedded to guide parameter updating. A generative adversarial network is utilized to synthesize fault data, a Darcy seepage causal engine is integrated to correct a loss function, the system comprises an action space construction unit, a precision dynamic scheduling unit, a mechanism constraint embedding unit and a data causal cooperation unit, and the method and the system realize data-mechanism fusion, balance precision and real-time performance, and improve equipment operation safety and adaptability.
Owner:ZHONGKE HUIZHI (BEIJING) TECH CO LTD

Shale oil three-dimensional well network well location multi-objective optimization method

The invention belongs to the technical field of shale oil horizontal well three-dimensional development, and particularly discloses a shale oil three-dimensional well network well location multi-objective optimization method which is used for solving the problem of how to achieve multi-objective collaborative optimization of the recovery ratio, the economic benefit and the inter-well interference degree. Comprising the following steps: (1) constructing a multi-field coupling dynamic oil drainage volume characterization model; (2) establishing an inter-well interference degree quantitative evaluation system based on the dynamic oil drainage volume characterization model; (3) realizing multi-source data fusion and high-precision prediction on the dynamic oil drainage volume, the recovery ratio, the net present value and the inter-well interference degree by combining a CNN-LSTM deep learning prediction model; and (4) implementing multi-objective optimization based on an NSGA-III multi-objective optimization algorithm, and comprehensively balancing the recovery ratio, the net present value and the inter-well interference degree on the premise of meeting engineering and economic constraints. Reliable technical support is provided for decision deployment of oil reservoir engineers under complex development conditions.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Injection-production well connectivity modeling and yield prediction method and device

The invention discloses an injection-production well connectivity modeling and yield prediction method and device, and relates to the technical field of oil reservoir engineering. Comprising the following steps: on the basis of preprocessed time sequence injection-production data, constructing a spatial topological graph structure according to screening conditions; constructing a yield prediction model based on the LSTM-GAT network, taking the spatial topological graph structure as the input of a graph attention mechanism, extracting the time dependence characteristics of the gas injection well and the production well by using the long short-term memory network, and extracting the spatial dependence relationship of the gas injection well and the production well by using the graph attention mechanism so as to output the predicted yield of the production well at the future moment; constructing a fitness function, and introducing a whale optimization algorithm to perform global optimization on the injection-production parameters to obtain an optimal injection-production parameter combination; and outputting the optimal injection-production parameter combination. The problems that when an existing method is used for determining the inter-well communication relation, a large amount of geological data and experiment cost are needed, the analysis process is complex, consumed time is long, and accurate optimization of injection-production parameters is difficult to achieve are solved.
Owner:XI'AN PETROLEUM UNIVERSITY

Deep energy reservoir multi-scale heat-fluid-solid coupling simulation method and system

The invention provides a deep energy reservoir multi-scale heat-fluid-solid coupling simulation method and system, and belongs to the field of deep energy reservoir numerical simulation. Acquiring spatial distribution characteristics and physical property parameters of different lithologic reservoir media under a micro-scale, and constructing a digital structure model of the reservoir media; a micro-observation action mechanism and a flow mechanism are embedded in the model to obtain a micro-observation numerical model; establishing a mapping relation by solving model structure parameters and physical property parameters of the microscopic numerical model under different thermal-fluid-solid coupling conditions; and on the basis of the mapping relationship, in combination with the macrogeological and engineering data of the target reservoir, establishing a macroscale heat-fluid-solid multi-field coupling control equation and solving, and outputting the multi-physics field response of the target reservoir under the given working condition. According to the method, fine simulation of physical property parameter dynamic transmission and a multi-field coupling evolution process from a micro view to a macro view is realized, and the accuracy and reliability of deep complex reservoir engineering behavior prediction are remarkably improved.
Owner:SHANDONG UNIV

Cellular automaton-based oil-water distribution simulation method, device, equipment, medium and product in oil reservoir polymer flooding process

The invention discloses an oil reservoir polymer flooding process oil-water distribution simulation method and device based on a cellular automaton, equipment, a medium and a product, and relates to the field of oil reservoir engineering and seepage mechanics. The method comprises the steps that rectangular grid division is conducted on an oil reservoir space, three-dimensional coordinates of cellular nodes are determined, and a cellular automaton model is constructed; according to the polymer oil displacement scheme parameters, oil reservoir state parameters at the end moment of water displacement are initialized, and boundary conditions of the mole-type cellular automaton model are established; making an evolution rule for each neighborhood cellular node in the Moire cellular automaton model; according to a numerical value stability rule, adjusting parameters of each neighborhood cellular node in the Mohr-type cellular automaton model; according to the method, a relative permeability nonlinear regulation and control rule is formulated for the Mohr-type cellular automaton model to simulate oil-water distribution in the oil reservoir polymer flooding process of the Mohr-type cellular automaton model, the starting pressure gradient is accurately simulated, and the low-permeability oil reservoir evolution process is accurately described.
Owner:NORTHEAST GASOLINEEUM UNIV

Automatic tracking method for co-registration of 2d SEM images and 3D tomographic data of rock cylinders

PendingUS20250182304A1Image enhancementImage analysisComputer graphics (images)Three dimensional tomography
The present invention comprises a computer-implemented method for automating the co-registration of SEM and 3D microtomography images in rock sample cylinders, characterized by comprising three main steps: (i) image pre-processing; (ii) internal orthogonal search; (iii) external multi-angle search. The method plays a fundamental role in the creation of image pairs. These pairs capture the same region of the rock, but with different analytical properties. Thus, the co-registration between 2D microscopy and 3D tomographic data provides a fundamental basis for the application of machine learning techniques and the expansion of the originally planar mineralogy to the entire three-dimensional volume. The three-dimensional mineralogical model generated from this co-registration has fundamental implications for the creation of digital rock models. The automation of the co-registration process between these acquisitions contributes to the advancement of petroleum engineering, since co-registration accelerates the process of generating image pairs for the use of machine learning algorithms in the generation of the three-dimensional mineralogical model. This method, in its turn, has direct application both in oil reservoir engineering and in geological interpretation.
Owner:PETROLEO BRASILEIRO SA PETROBRAS +1

Ultra-long-term prediction method and system for global fracture conductivity

The invention discloses a global fracture conductivity ultra-long-term prediction method and system, belongs to the technical field of crossing of oil and gas reservoir engineering and artificial intelligence, and is used for solving the technical problem that the calculation cost is high when an existing physical model is used for predicting fracture ultra-long-term conductivity. The method comprises the following steps: generating a global fracture conductivity evolution data set covering multiple working conditions through a numerical simulation system; constructing a multi-channel input tensor containing dynamic fracture conductivity and static proppant concentration distribution; using the data set to train a plurality of Fourier neural operator models for different prediction time scales; and based on a hierarchical time sequence aggregation strategy, iteratively calling trained models of different time scales, and realizing rapid prediction of fracture conductivity in a few years to tens of years in the future. According to the method, on the premise of ensuring the prediction precision, the calculation time consumption of ultra-long-term prediction can be remarkably reduced, and decision support is provided for crack design and production strategy optimization.
Owner:SOUTHWEST PETROLEUM UNIV

Shale solid skeleton and organic matter elastic parameter synchronous prediction method

The invention is applicable to the field of oil and gas geophysical exploration, and provides a shale solid skeleton and organic matter elastic parameter synchronous prediction method, which comprises the following steps of: constructing a rock physical model for representing a shale reservoir solid skeleton elastic modulus and an organic matter elastic modulus; developing an in-well inversion method based on the rock physical model; combining a rock physical model and a scattering function theory, and establishing a reflection coefficient formula represented by shale solid skeleton elasticity modulus, organic matter elasticity modulus and density parameter linearization; a reflection coefficient formula and a Bayesian linear inversion theory are combined to develop an earthquake rock physical inversion method; applying synthetic seismic data, and testing and verifying the effectiveness of the seismic rock physical inversion method constructed in the step E; and then the method is applied to actual seismic data to predict the elasticity modulus of a shale gas reservoir solid skeleton and organic matters in a research area, and an effective method is provided for brittleness evaluation of a shale gas reservoir engineering dessert and organic matter enrichment prediction of a geological dessert.
Owner:JILIN UNIVERSITY

Fracture parameter multi-objective optimization method for compressed air energy storage of natural fracture depleted reservoir

The invention discloses a fracture parameter multi-objective optimization method for compressed air energy storage of a natural fracture depleted oil reservoir, and belongs to the technical field of oil reservoir engineering and energy storage, and the method comprises the following steps: S1, constructing a double-pore medium numerical model for a matrix-fracture double-pore structure of a natural fracture depleted oil reservoir, analyzing a correlation mechanism of crack parameters and energy storage performance; s2, based on a result of the S1, constructing a multi-target cooperative regulation mathematical model; and S3, solving the multi-target cooperative regulation mathematical model by adopting an adaptive genetic algorithm, and constructing a staged dynamic regulation strategy penetrating through the whole energy storage period in combination with the operation characteristics of the energy storage system. By optimizing the fracture parameters of the natural fracture depleted oil reservoir, efficient and low-loss storage and recovery of air in the fracture oil reservoir are achieved, the air recovery rate and the controllability of operation of the energy storage system are improved, and the stability of the reservoir structure, the safety of the energy storage process, the long-term economy of the system and the utilization efficiency of renewable energy sources are ensured.
Owner:YANGTZE UNIVERSITY

Shale solid skeleton and organic matter elastic parameter synchronous prediction method

The present application is suitable for oil and gas geophysical exploration field, and provides a shale solid skeleton and organic matter elastic parameter synchronous prediction method, the method comprises the following steps: constructing a petrophysical model representing the elastic modulus of shale reservoir solid skeleton and the elastic modulus of organic matter; developing an inversion method in the well based on the petrophysical model; combining the petrophysical model and the scattering function theory, establishing a reflection coefficient formula linearly characterized by the elastic modulus of shale solid skeleton, the elastic modulus of organic matter and the density parameter; combining the reflection coefficient formula and the Bayesian linear inversion theory, developing a seismic petrophysical inversion method; applying synthetic seismic data, testing and verifying the effectiveness of the seismic petrophysical inversion method constructed in step E; then applied to actual seismic data, predicting the elastic modulus of shale gas reservoir solid skeleton and organic matter in the study area, providing an effective method for the brittleness evaluation of shale gas reservoir engineering sweet spot and the organic matter enrichment prediction of geological sweet spot.
Owner:JILIN UNIVERSITY

Dynamic displacement capillary pressure-saturation curve construction method based on nuclear magnetic resonance

The invention belongs to the technical field of oil and gas reservoir engineering and multiphase seepage dynamic monitoring, relates to a characterization method of seepage behaviors of multiphase fluid in a porous medium, and particularly provides a dynamic construction method of a multiphase displacement capillary pressure-saturation relationship based on nuclear magnetic resonance. Comprising the following steps: S1, acquiring a low-field nuclear magnetic resonance relaxation spectrum of a porous medium in a gas-water two-phase displacement process; s2, determining two-phase fluid interfacial tension, a wetting contact angle and a rock surface relaxation rate; s3, determining the dynamic cut-off relaxation time of the displacement stage; s4, calculating equivalent capillary pressure; the residual water saturation is calculated, and the equivalent capillary pressure is the capillary pressure corresponding to the current displacement stage and is used for constructing a capillary pressure-saturation curve. According to the method, the capillary pressure change in the porous medium can be obtained only through spectral analysis without a centrifugal or mercury injection experiment.
Owner:ANHUI UNIV OF SCI & TECH

Flood wave classification evolution characteristic calculation method and system and medium

The invention relates to a flood wave classification evolution characteristic calculation method and system and a medium. The method comprises the following specific steps: collecting reservoir operation data and long-series hydrological data of important control stations of a river channel; according to the flood routing characteristics of the reservoir-river channel class, the similar flood process of the downstream of the reservoir is judged; judging whether the flood routing process of each control site of the river channel is influenced by the jacking of the water level of the downstream reservoir or not according to the flood routing characteristics of the river channel-reservoir class; based on the reservoir dispatching regulation and the reservoir engineering characteristics, analyzing whether the historical typical reservoir drainage mode meets the flood wave classification requirement or not; a control variable method is adopted to analyze the relationship between evolution characteristics such as flood peak evolution duration, a tanning coefficient and rising response time and elements such as initial reservoir outbound flow, maximum rise of the reservoir outbound flow, the increase rate of the reservoir outbound flow, maximum duration of the reservoir outbound flow and the water level of the reservoir, and a correlation curve is constructed. According to the invention, specific analysis of flood routing in various flood routing scenes is realized.
Owner:CHINA THREE GORGES CORPORATION +1

Flood season drought limit water level dispatching operation method responding to drought and flood prevention

The invention discloses a flood season drought limit water level scheduling operation method responding to drought and flood prevention simultaneously, which comprises the following steps of: 1, preliminarily determining a flood season drought limit water level scheme by adopting a reverse sequence recursion method according to downstream water demand; step 2, identifying key influence factors influencing the flood season drought limit water level scheduling application mode of the reservoir system in combination with the current scheduling procedure of the reservoir; 3, constructing a standard normal form of a flood season drought limit water level starting opportunity and a scheduling mode of the reservoir system; 4, establishing a reservoir system flood season scheduling simulation model considering drought limit water level application, and performing simulation calculation in combination with a typical year of a flood season extreme event to form a reservoir drought limit water level application scheme capable of coping with different flood season extreme inflow conditions; the method can scientifically and accurately judge the starting opportunity of the drought limit water level of the reservoir on the premise of guaranteeing flood control safety of a hub and a drainage basin, and is suitable for reservoir engineering which simultaneously undertakes flood control and drought control tasks.
Owner:CHINA YANGTZE POWER

Dynamic correction method for storage capacity of gas storage of condensate gas reservoir

The invention relates to the technical field of gas reservoir engineering and development, in particular to a dynamic correction method for the storage capacity of a gas storage of a condensate gas reservoir. Comprising the following specific steps: S1, based on a gas reservoir engineering method and geological data, calculating an original gas-bearing pore volume of a gas storage, and constructing an initial material balance model and various key parameters related to the initial material balance model; according to the method, through basic data collection and model construction, experimental determination and multi-path pore volume change calculation, and then model correction, parameter review, experimental simulation and final prediction and optimization, the storage capacity related parameters can be accurately calculated and corrected, the influence of various factors on the pore volume is effectively quantified, and the calculation efficiency is improved. Accurate prediction of the storage capacity change of the gas storage under future multi-cycle injection and production is achieved, injection and production parameters are optimized to remarkably improve the working gas amount and the storage capacity utilization rate, and good economic benefits and gas storage operation benefits are brought.
Owner:NORTHEAST GASOLINEEUM UNIV

Methods and computer equipment for determining dynamic reserves of condensate gas reservoirs

This invention provides a method and computer equipment for determining the dynamic reserves of condensate gas reservoirs, belonging to the field of oil and gas reservoir engineering. The method for determining the dynamic reserves of condensate gas reservoirs includes: acquiring a set of dynamic production data from well pressure measurement of the target condensate gas reservoir; converting the oil production data in the set of dynamic production data to obtain a total converted dynamic production data set of well pressure measurement; acquiring the pseudo-pressure of the target condensate gas reservoir under original conditions; selecting dynamic production data from well pressure measurement at multiple different pressure measurement time points that meet preset conditions to obtain a production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir based on the pseudo-pressure; adjusting the production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir to obtain an adjusted production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir based on the adjusted production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir; and calculating the dynamic reserves of the target condensate gas reservoir based on the adjusted production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Quantitative identification method for water invasion volume based on semi-ellipsoid radial seepage model

The invention relates to a water invasion volume quantitative identification method based on a semi-ellipsoid radial seepage model, and belongs to the technical field of oil reservoir engineering. The method comprises the following specific steps that dimensionless time tD and pressure increment delta pj of an oil well are calculated; calculating dynamic reserves without water invasion according to the dynamic data of the oil well and a flowing substance balance equation; calculating a water invasion coefficient; the water invasion volume is obtained. The invention relates to a novel method for calculating invasion volumes of different types of water bodies invaded into an oil reservoir by radial flow edge and bottom water by utilizing a semi-ellipsoid geometric model of a Van Everdex-Hust equation principle, which can solve the problem of quantification of the invasion volumes of the water bodies at any moment in the water invasion process of the edge and bottom water oil reservoir. The influence of unstable seepage on the water invasion process is considered, the basic law of fluid flowing in the water invasion process is met, meanwhile, the water invasion coefficient calculation method which does not need to estimate the size of an oil reservoir is provided, and the overall error is small.
Owner:PETROCHINA CO LTD

Quantitative evaluation method of sweet spot quality in conglomerate horizontal wells based on logging while drilling data

The present invention provides a method for quantitatively evaluating the sweet spot quality of conglomerate horizontal wells based on logging-while-drilling (LWD) data. Because some wells lack completion electrical logging data and dipole acoustic wave data, density, P-wave transit time, and S-wave transit time data cannot be directly obtained. LWD and gas logging data must be used to model and effectively model density, acoustic wave, and S-wave transit time. Based on the calculated density, acoustic wave, and S-wave transit time, geological parameters such as porosity, saturation, and permeability can be calculated. Based on S-wave transit time, density, and P-wave transit time, reservoir engineering parameters such as Young's modulus, Poisson's ratio, brittleness index, and maximum and minimum principal stresses can be calculated. The quality of the horizontal well sweet spot can be quantitatively evaluated by comprehensively utilizing the geological sweet spot and engineering sweet spot parameters.
Owner:PETROCHINA CO LTD

Well group control reserve chemical flooding sweep efficiency calculation method

The application discloses a kind of well group control reserves chemical flooding sweep efficiency calculation method, comprising the following steps: (1), three-dimensional fine porosity and permeability model is established;(2), well group control reserves chemical flooding sweep efficiency calculation.This method can improve the accuracy of well group control reserves chemical flooding sweep efficiency calculation, so as to provide accurate basis for chemical flooding reservoir engineering design, numerical simulation accuracy, tracking adjustment and post-evaluation of implementation effect of scheme.Compared with the traditional chemical flooding sweep efficiency calculation, the method is more scientific, the concept is clearer, the index is more quantitative, and the chemical flooding sweep efficiency calculation result is more accurate and reliable, which has important significance for guiding oilfield production and development.
Owner:NORTHEAST GASOLINEEUM UNIV

Gas-water seepage field simulation method based on multi-scale analysis

The invention discloses a multi-scale analysis-based gas-water seepage field simulation method, which specifically comprises the following steps of: based on a digital rock core reconstructed by a CT (Computed Tomography) scanning image of a typical rock sample of a target reservoir, adopting a microcosmic pore network flow simulation technology; the change rule of the stratum seepage capacity in different stratum pressure gradients and water drive processes, the use degree of a pore network and the water drive process in a pore are calculated, and then a correlation chart with the rock permeability and the pressure gradients is established and used for rapid measurement and calculation of the actual reserve use degree and the recovery degree of the water-invaded sandstone gas reservoir. The method starts from a rock microcosmic pore channel, the scale is amplified to a macroscopic oil reservoir during application, the method has the cross-scale characteristic, and the method is used for rapidly measuring, calculating and evaluating the reserve utilization degree and the recovery degree of the actual water-invaded sandstone gas reservoir and is beneficial to rapid development of the gas reservoir engineering scheme design in a mine field.
Owner:PETROCHINA CO LTD

Closed coring well saturation correction method based on numerical simulation

The invention provides a numerical simulation-based closed cored well saturation correction method. The correction method comprises the following steps of: S1, establishing a typical rock core numerical simulation model with various physical properties; s2, respectively calculating attribute parameters of the plurality of core models; s3, converting state parameters of the rock core model in an original stratum state into a ground state; s4, calculating the residual oil saturation after the core model simulates the coring loss in a ground state; and S5, establishing a function relationship between the oil saturation of the original stratum state of the core model and the residual oil saturation of the ground state after coring loss under various reservoir physical property conditions. Closed coring well saturation correction is achieved, a foundation is laid for reservoir engineering analysis, a water-oil displacement theory, reservoir development scheme compilation and reservoir dynamic analysis and development adjustment, and the method has important basic significance for oilfield development practice.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Anti-seepage method in karst depression catchment reservoir-forming project

The invention discloses an anti-seepage method in a karst depression catchment reservoir-forming project, which adopts a grouting curtain combined underground river plugging measure, and comprises the following steps: 1) collecting hydraulic parameters; 2) underground river slope calculation: based on the hydraulic parameters and the difference between the underground river outlet flow velocity and the underground river inlet flow velocity, adopting different methods to calculate the underground river overall slope; (3) determining the position of an upper layer grouting tunnel; 4) determining an underground river plugging position based on the slope; 5) calculating the height of the grouting curtain based on the slope; according to the anti-seepage method in the karst depression catchment reservoir forming project, determination of key parameters in construction is improved, the anti-seepage construction precision and the construction efficiency can be improved, and the construction cost is saved.
Owner:GUIYANG WATER RESOURCES & HYDROPOWER SURVEY DESIGN & RES INST CO LTD +2

Coprocessing method of reservoir project operation management task and model manager thereof

The invention relates to a cooperative processing method for a reservoir project operation management task and a model manager thereof, and aims to realize optimization of a task allocation strategy by dynamically adjusting performance requirements and task excitation of asynchronous subtasks in combination with computing power of nodes and real-time asynchronous subtask progress so as to improve the task allocation efficiency. Therefore, the problems of large response delay and low resource utilization rate in a traditional centralized management mode are solved, and the method has the advantages of dynamically adjusting the task allocation strategy, optimizing the resource utilization rate, improving the task cooperation efficiency and shortening the overall task completion time.
Owner:HUNAN WATER CONSERVANCY DEV INVESTMENT CO LTD +2

Tight gas well unstable open-flow capacity evaluation method based on production dynamic data

PendingCN121705563AComplex mathematical operationsStream flowDuhamel's principle
The invention discloses a tight gas well unstable open-flow capacity evaluation method based on production dynamic data, and belongs to the technical field of gas reservoir engineering. The method comprises the following steps: firstly, collecting tight gas well production dynamic data and basic parameters and preprocessing; then, a deconvolution algorithm and a Duhamel principle are introduced, and variable-yield variable-pressure data are standardized into constant-pressure variable-yield data; then, in combination with a gas reservoir seepage differential equation considering natural gas compressibility, a'bottom hole flowing pressure-yield-time 'relation model is established; a yield-time function is reversely deduced, the bottom hole flowing pressure is made to be 0, and the unstable open-flow capacity is calculated; and finally, drawing a change curve, analyzing a dynamic rule and a decline mechanism, and providing reference for development countermeasures. The method realizes efficient utilization of production dynamic data, accurately captures an open-flow capacity decline rule, improves evaluation precision and timeliness, reduces cost, is suitable for unconventional gas reservoirs such as tight gas reservoirs, and provides support for efficient development of the gas reservoirs.
Owner:SINOFTS PETROLEUM SERVICES CO LTD

System and method for training reservoir engineers based on digital twin technology

Disclosed are a system and a method for training reservoir engineers based on digital twin technology. The training system includes a data operation workstation, a data distribution server and an intelligent terminal; trainees view initial data of reservoir geology by the intelligent terminal to form a preliminary understanding of the reservoir, and then issue reservoir development instructions; according to the development instructions, the reservoir numerical simulation operation module sends feedback data to the intelligent terminal after simulation calculation for the trainees to view, and the trainees analyze and determine reservoir feedback information, thereby forming a new understanding of the reservoir. After having updated understanding of the reservoir, the trainees issue a reservoir development instruction again by the intelligent terminal until the oil and gas field development is completed. After completion, the data operation workstation outputs recovery factor and profit amount of this development simulated by the trainees as simulation results.
Owner:SOUTHWEST PETROLEUM UNIV

Stratum collapse pressure measuring method combining seismic wave velocity and fault effect

The application relates to the technical field of oil reservoir engineering, and is a stratum collapse pressure measuring and calculating method and device combining seismic wave velocity and fault effect, the method comprising the following steps: obtaining the depth pressure and the ratio of transverse wave velocity to longitudinal wave velocity of a target drilling well; establishing a collapse pressure calculation formula according to the relationship among the collapse pressure, the depth pressure and the structural influence; and measuring and calculating the stratum collapse pressure according to the depth pressure, the ratio of transverse wave velocity to longitudinal wave velocity and the collapse pressure calculation formula. The application deeply excavates the petrophysical characteristics of seismic wave velocity reaction, expresses the stratum stress balance state by using the fault activity effect, replaces the complex and difficult-to-measure rock elastic parameters in the traditional Mohr-Coulomb criterion by the ratio of transverse wave velocity to longitudinal wave velocity and the fault effect parameter, greatly simplifies the calculation process, significantly reduces the parameter acquisition difficulty, and has multiple advantages of simple operation, strong timeliness, high calculation efficiency and high accuracy, thereby providing an innovative solution for the rapid and accurate measurement of the stratum collapse pressure in the drilling engineering.
Owner:CNPC XIBU DRILLING ENG +1

Gas well productivity and EUR optimization method in middle and later periods of dense low-permeability gas reservoir development

The invention provides a gas well productivity and EUR optimization method in the middle and later periods of dense low-permeability gas reservoir development, and relates to the technical field of gas reservoir engineering, and the method comprises the steps: collecting historical dynamic and static data of a dense low-permeability gas reservoir, and constructing index system data; based on the index system data, static and dynamic main control factor analysis influencing open flow capacity and recoverable reserves is carried out, and a main control factor set is obtained; according to the main control factor set, using a machine learning algorithm to construct a prediction model used for predicting open flow capacity and recoverable reserves; taking open flow capacity or recoverable reserve maximization as a target, and constructing a control optimization model for optimizing production control variables; and for the target well, using the prediction model to predict open flow capacity and recoverable reserves, and using the control optimization model to optimize production control variables. Compared with a traditional productivity analysis method, the method has the advantages that subjective factor interference is effectively reduced, the analysis process is more objective and efficient, and productivity and EUR evaluation under the interaction of different factors is achieved at the same time.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

A reservoir lifecycle management system based on spatiotemporal matrix and digital twin.

This invention relates to the field of reservoir engineering management technology, specifically a reservoir lifecycle management system based on spatiotemporal matrix and digital twin. The system includes a digital twin model construction module, a spatiotemporal matrix module, a data fusion module, a lifecycle simulation module, a real-time data acquisition and update module, a model dynamic adjustment module, and a management decision support module. The system uses a spatiotemporal matrix to uniformly organize and manage multi-source data throughout the reservoir's lifecycle, utilizes a digital twin model to construct a virtual representation of the reservoir, achieves bidirectional synchronization through data fusion, and dynamically adjusts model parameters based on real-time data, ultimately generating lifecycle management decision outputs. This invention solves the problems of scattered data and static models in existing technologies, improving the accuracy and reliability of reservoir management.
Owner:YUNNAN AGRICULTURAL UNIVERSITY +1

A method for building a reservoir in a loess hilly region

PendingCN122446660AWater storageWater resources
The application relates to the technical field of hydraulic engineering, and discloses a loess hilly area reservoir building method, which aims at the problems of dam site scarcity, low efficiency of water and soil resource development, dispersion of existing water storage projects, prominent contradiction between ecology and culture protection and the like in loess hilly areas, takes global planning and systematic management as cores, realizes organic unification of intensive water resource utilization, comprehensive benefit expansion and ecological protection through a five-step method of scheme optimization comparison, building of large reservoirs and merging of small reservoirs, function zoning, series connection of new and old projects and overall planning of ecology and culture. The method solves the pain points of high building cost, many immigrants and low benefit of reservoirs in loess hilly areas through innovative means such as multi-scheme optimization comparison, function zoning of one reservoir with two systems, reservoir excavation and reconstruction technology, land lifting and regulation and historical culture protection, and can be widely applied to reservoir engineering construction in loess hilly areas.
Owner:ZHEJIANG DESIGN INST OF WATER CONSERVANCY & HYDROELECTRIC POWER

A method for deploying a well network to increase the storage capacity of a water-flooded high-permeability gas storage facility.

PendingCN122082717ASolve common problems of uneven injection-production displacementIncrease storage capacity in water intrusion areasSurveyClimate change adaptationNetwork deploymentThermodynamics
A well network deployment method for increasing the storage capacity of water-flooded high-permeability gas storage facilities, belonging to the field of oil reservoir gas storage construction technology, includes the following steps: S1, employing oil and gas reservoir fine description technology; S2, employing oil and gas reservoir engineering technology; S3, employing gas storage dynamic analysis technology; S4, establishing a comprehensive geological model, and combining steps S2 and S3 to clarify the direction of seepage dominance and delineate seepage zones in oil and gas areas. This invention, under conditions of high well network control and severe water intrusion and gas channeling, can significantly increase the storage capacity of water-flooded areas, solve the common problem of uneven injection-production displacement in sandstone gas storage facilities, and alleviate the contradiction of large differences in displacement effects between favorable and unfavorable areas during cyclic injection-production. This invention can be applied to the expansion of gas storage facilities that have been renovated due to significant seepage dominance or strong planar heterogeneity.
Owner:LIAOHE GASOLINEEUM EXPLORATION BUREAU CO LTD +2