23 results about "Reservoir engineering" patented technology

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.

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.

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.

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.

The present disclosure relates to a kind of water deep penetration guide seam fracturing reservoir engineering design methods, comprising: using water deep penetration perforation method, drill open horizontal long hole in the top of thick oil layer, the horizontal long hole is drilled in low water content direction on plane, and drainage channel is formed in the part where water drive oil capacity is weak;The penetration length of the water deep penetration perforation is determined according to the development thickness of oil layer, injection-production connection relationship, injection-production distance, the number of perforation is in the same direction on the top of each subdivision layer blocked by interlayer, and it is 0.2-0.4m away from upper barrier or interlayer;After the water deep penetration perforation, hydraulic fracturing is carried out to form artificial fracture, let the drilled horizontal long hole guide the longitudinal position and horizontal trend of artificial fracture, to improve the flow conductivity again, realize the purpose of "targeting" tapping of remaining oil enrichment site in the cubic of injection-production well positive rhythm oil layer.

The present application relates to a kind of oil reservoir FWAG injection-production parameter determination method, device and equipment, it is related to oil reservoir engineering technical field, including: the target numerical simulation model for representing the target oil reservoir FWAG injection-production process is constructed;Based on the target numerical simulation model and preset general FWAG strategy model, the basic FWAG strategy of target oil reservoir is determined;The reservoir state data of target oil reservoir is acquired;Based on the reservoir state data, using the basic FWAG strategy carries out injection-production simulation;Injection-production simulation result is input into the target numerical simulation model, and injection-production simulation feedback data is obtained;According to the injection-production simulation feedback data, with the production efficiency and stability of target oil reservoir FWAG injection-production process maximization as goal, the basic FWAG strategy is optimized;Based on the basic FWAG strategy after optimization, the FWAG injection-production parameter of target oil reservoir is determined.

The application discloses a method for identifying remaining reserves distribution of a water-bearing gas reservoir, and belongs to the technical field of oil and gas field development. S1, a water body at the edge of a gas reservoir and internal gas wells are equivalent to separate units, and initial control volumes of each unit and between the units are calculated; S2, unit pressures and water contents are calculated, and the control volumes of each unit and between the units are corrected in real time; S3, initial control reserves and corrected control reserves are calculated according to the initial control volumes and the corrected control volumes, so that the remaining reserves and the remaining reserves distribution of the gas reservoir are determined. The application corrects the control volumes of each unit and between the units on the basis of the measured water content data of the gas well and the single-well testing interpretation result data, and on the basis of the gas reservoir engineering method and the intelligent optimization algorithm, so that the remaining reserves and the remaining reserves distribution of the water-bearing gas reservoir are determined, and the technical problem that the remaining reserves recovery efficiency cannot be improved because the natural gas is sealed by the water invasion in the water-bearing gas reservoir, and the sealed natural gas cannot be accurately identified is solved.

The present application relates to the technical field of oil reservoir engineering, and is a method for calculating oil saturation of a horizontal section of a pilot hole converted into a horizontal well, which comprises: obtaining equivalent oil contents of light oil, medium oil and heavy oil in a horizontal section of a pilot hole converted into a horizontal well; determining an oiliness index of the horizontal section; and calculating the oil saturation of the horizontal section according to the equivalent oil contents of the light oil, the medium oil and the heavy oil and the oiliness index. The present application obtains the equivalent oil contents of the light oil, the medium oil and the heavy oil and the oiliness index of the horizontal section based on quantitative fluorescence logging technology, determines the oil saturation of the horizontal section, realizes fast and accurate acquisition of the oil saturation distribution of the horizontal section of the horizontal well, and provides a scientific basis for oilfield exploration and development and selection of fractured well sections.

This invention belongs to the field of oil and gas field reservoir engineering technology, specifically a method for characterizing the impact of clastic reservoir heterogeneity on reservoir efficiency. First, mineral composition, porosity and permeability, mechanical parameters, and spatial configuration of the study area are obtained. Based on the interlayer spatial configuration, flow units are divided to quantitatively evaluate the constraints of interlayers on effective reservoir space. Through creep experiments and alternating load experiments, mechanical property degradation models of different types of interlayers under long-term high pressure and injection-production cycles are established. A dynamic model of interlayer sealing capacity evolution is constructed to quantify its long-term potential to suppress vertical fluid flow. By coupling the interlayer volumetric sweep efficiency, the mechanical degradation model, and the sealing capacity evolution model, a comprehensive reservoir efficiency impact coefficient is established, enabling a quantitative evaluation of reservoir efficiency under different types of interlayer constraints. This invention elevates the impact of interlayer heterogeneity on reservoirs from a static description to a dynamic quantitative evaluation, providing a scientific basis for the site selection optimization and injection-production strategy formulation of underground reservoirs.

The application belongs to the technical field of reservoir engineering, and particularly relates to a contact grouting pipeline system structure and method for a concrete dam slope section. The contact grouting pipeline system structure for the concrete dam slope section comprises a grout inlet and return main pipe, a horizontal branch pipe, an exhaust branch pipe, a grout distribution pipe, a grout stop piece and a protective steel mesh. The grout inlet and return main pipe is arranged on both sides of a grouting area or a gallery section, adopts a circulating grouting mode, and grout flows in the main pipe in a circulating manner; the horizontal branch pipe connects the grout inlet and return main pipe and the grout distribution pipe, and the exhaust branch pipe is used for exhausting air accumulated on the top of the grouting area; the grout distribution pipe is embedded in a drill hole and extends to a contact surface between a bedrock and concrete; the grout stop piece is arranged on a partition pier and is used for partition isolation; and the protective steel mesh is laid above the pipeline to prevent the pipeline from being damaged in a pouring process. The application has the advantages of simplified construction procedure, high safety, small influence on the consolidation grouting quality, and suitability for contact grouting construction of a dam slope section.

This invention provides a method and system for calculating development indicators of polymer flooding reservoirs, belonging to the field of reservoir engineering. The method includes: initializing the split flow rate data of each oil layer and the split flow rate data of the flow tubes based on the seepage characteristics of the polymer flooding reservoir at different development stages, the initial flow tube distribution data corresponding to the target well network, and the initial oil layer data of the target well network, to obtain an initial state; based on the initial state, determining the split flow rate data of each oil layer and the split flow rate data of the flow tubes at each moment during the water injection process, starting from the start of water injection; updating the displacement process leading edge distance data and development indicator data for characterizing the development status of the displacement process of the target well network in real time according to the split flow rate data of each oil layer and the split flow rate data of the flow tubes at each moment during the water injection process; and stopping water injection when the water injection status data of the target well network reaches a preset stopping condition. This method reduces the computational difficulty while accurately calculating the development dynamics of the target well network.

This invention relates to a method for predicting the miscibility of carbon dioxide flooding, belonging to the field of oilfield development technology. The method of this invention, from a microscopic perspective of component changes, directly and quantitatively characterizes the reservoir miscibility after CO2 flooding. After CO2 injection into the reservoir, the miscibility coefficient is used to characterize the changes of various components in the crude oil within the affected area, thereby calculating the CO2 flooding miscibility within that area. This allows for the evaluation of the CO2 flooding effect in the target block. This method improves the prediction accuracy of carbon dioxide flooding miscibility, provides a basis and technical support for evaluating the effect of injected gas blocks, and can also guide the preparation of CO2 flooding reservoir engineering plans.

The application discloses a full-depth reservoir physical and mechanical parameter characterization method, device, equipment and medium, relates to oil and gas development, and comprises the following steps: acquiring and processing multi-source data in a wellbore range of a reservoir, and constructing and generating an artificial intelligence model; the prediction parameter results of the artificial intelligence model are constrained and corrected; the preprocessed multi-source data is jointly input into the artificial intelligence model, the constrained and corrected reservoir physical and mechanical parameter results are fused and completed, and a full-depth parameter field is formed; a numerical simulation model is constructed based on the parameter field, a reservoir mechanical response process is simulated, and simulation results are obtained; the parameter field is inverted and iteratively corrected by using the simulation results, and target full-depth reservoir physical and mechanical parameter characterization results are obtained. The application realizes multi-source data fusion, AI driving and simulation inversion closed loop, significantly improves the integrity and reliability of reservoir physical and mechanical parameter characterization, and is suitable for different types of reservoir engineering.

The application discloses a reservoir cavity repairing method based on magnetic slurry, and belongs to the technical field of reservoir engineering repairing, which takes a thermoplastic polyurethane composite double-layer air bag as a core, a magnetic unit is arranged in the inner bag and connected with an air pump, the outer bag is sealingly connected with a grouting machine provided with a precise control system through a grouting pipe, and the grouting machine contains magnetic slurry containing fibers. The construction is performed through the following steps: the air bag is extended to the far end of the cavity for air inflation and water drainage, the cavity is filled with the slurry, the air bag is recovered, the cavity is sealed with quick-setting magnetic slurry, and the grouting pipe is cut off after solidification. The application realizes the precise fitting of the slurry to the cavity profile through the cooperation of magnetism and slurry, the double-layer air bag can be reused, the compressive strength of the magnetic slurry after solidification is 32-35 MPa, the maintenance time is only 8-12 hours, the use of the reservoir does not need to be interrupted, the method is suitable for cavity repairing under various working conditions, and the filling integrity and construction efficiency are greatly improved.

The application provides a kind of offshore high water cut oilfield injection-production structure adjustment method based on flow field characterization, belongs to the technical field of reservoir engineering, including the following steps: S1: fine history matching of reservoir numerical model and calculation of flow field basic attribute parameters;S2: taking the grid in the numerical model as a unit, calculate the dynamic efficiency coefficient in each grid and carry out normalization processing;S3: dynamic efficiency coefficient field grading evaluation, divide injection-production structure adjustment potential unit;S4: calculate the reserve abundance coefficient of each grid unit and carry out normalization processing;S5: combine the normalized dynamic efficiency coefficient and reserve abundance coefficient of grid unit, calculate and output dynamic splitting coefficient;S6: based on dynamic splitting coefficient, carry out flow field grading evaluation, and then guide injection-production structure adjustment.The application realizes real-time quantitative description of reservoir oil-water seepage law and remaining oil enrichment law, improves the accuracy and reliability of injection-production structure adjustment of offshore high water cut oilfield.

The present application belongs to the technical field of oil and gas reservoir energy development, and discloses a kind of stereoscopic injection-production well pattern construction method based on multi-objective algorithm.Effectively solve the problem that the existing potential evaluation is only based on single index, which makes it difficult to effectively use the potential area divided.The method includes: proposing fault inner core, fault outer core, fracture development dense belt and secondary fracture belt;using reservoir engineering method and numerical simulation streamline method, analyzing interwell connectivity of reservoir unit;based on embedded discrete fracture model, analyzing remaining oil distribution pattern under the control of core belt structure;combining remaining oil producing potential, displacement power, flow capacity, connectivity and reserve abundance, constructing multi-parameter comprehensive evaluation system;for oil reservoirs with or without bottom water, forming stereoscopic injection-production well pattern construction technology;based on multi-objective optimization algorithm, taking three-dimensional collaborative optimization of recovery efficiency, well-controlled reserves and net present value as the core, constructing efficient well location deployment technology in different fracture zones.

The utility model discloses a flood discharge and sand discharge hole arrangement structure of pumped storage reservoir engineering and construction diversion method in the technical field of water conservancy and hydropower engineering. The flood discharge and sand discharge hole arrangement structure of pumped storage reservoir engineering of sand not entering the reservoir, containing the reservoir main dam, still contains the sand retaining dam and the flood discharge and sand discharge hole, the sand retaining dam is located the upstream of reservoir main dam, the flood discharge and sand discharge hole import section is located the upstream of sand retaining dam, the flood discharge and sand discharge hole body section is through the mountain, and the flood discharge and sand discharge hole export section is located the downstream of reservoir main dam, the sand retaining dam still is provided with sand retaining dam water delivery hole, is used for the water delivery to sand retaining dam and reservoir main dam interval reservoir area. Through setting up sand retaining dam and retaining water in the upstream, and utilize flood discharge and sand discharge hole to arrange flood and sand to the downstream of reservoir main dam, utilize sand retaining dam water delivery hole to carry out initial water storage and operation period water supplement to the lower reservoir, make the lower reservoir become the special use reservoir, thereby avoid the influence of sand, form the new type pivot arrangement mode of sand not entering the reservoir pumped storage power station reservoir.

This invention discloses a method for optimizing the well-fracture network in tight oil reservoirs. The optimization method includes: Step S1: Modeling based on the detailed geology of the reservoir; Step S2: Modeling based on the detailed geostress parameters of the reservoir; Step S3: Determining the fracture network parameters based on the initial fracturing process scheme; Step S4: Determining the initial well spacing using reservoir engineering methods based on the fracture network parameters; Step S5: Determining the well-fracture network adaptability using reservoir engineering methods based on the initial well spacing; Step S6: Determining the well-fracture network adaptability and development effect using numerical simulation. This method improves the effective control of geological reserves in tight oil reservoirs and maximizes the possibility of balanced displacement, effectively realizing reservoir potential and significantly increasing production capacity and ultimate recovery rate.

The application discloses a kind of development adjusted reservoir engineering research whole-process informatization method, comprising: collecting reservoir static, production, test, monitoring, test data;Divide research and analysis object, carry out data splitting and classification;Automatic process visualization index;Man-machine interactive data iteration verification, and improve data and analysis index;Data export is converted and format conversion;Man-machine interactive scheme deployment optimization.The application can optimize the interactive relationship between reservoir engineering comprehensive researchers and programmatic platform software, form the optimization method of reservoir engineering comprehensive research quality and efficiency, and greatly improve the whole-process work efficiency of development adjusted reservoir engineering research.

This invention discloses an end-to-end reservoir parameter inversion method based on a consistency model and facies constraints, relating to the field of reservoir engineering technology. The invention first acquires geological parameters and production dynamic data of the target area, constructs a sample database and performs data preprocessing, then constructs a consistency model and an improved U-shaped network, integrating the two to build an end-to-end reservoir parameter inversion model considering facies constraints. The end-to-end reservoir parameter inversion model is trained and validated using the database. After optimizing the end-to-end reservoir parameter inversion model, it is used to perform end-to-end history fitting on a specified reservoir to invert the reservoir geological parameter field. This method combines physical mechanism constraints with efficient model generation methods. By introducing the consistency model and sedimentary facies distribution constraints into the end-to-end reservoir parameter inversion model, it improves the robustness of the inversion and provides technical support for the accurate inversion of the reservoir geological parameter field.