Ultra-deepwater oil field floating type production oil storage and discharge platform type selection method, device and equipment

Abstract

The invention discloses a floating type production oil storage and discharge platform type selection method, device and equipment for an ultra-deepwater oil field. Comprising the following steps: determining the oil reservoir scale, reservoir, fault distribution and sedimentary facies characteristics of the ultra-deepwater oil field according to seismic data and geological data, and predicting oil reservoir geological reserves; predicting the yield characteristics of the oil reservoir and the full life cycle of each single well according to the yield characteristics of the pilot production well; determining a connection scheme of at least one floating production oil storage and discharge platform and at least one oil reservoir according to the geological reserves of the oil reservoir, the yield characteristics and the required length of the underwater pipeline; and determining a target connection scheme and the scale and model selection of the floating production oil storage and offloading platform device according to the processing, gathering and transportation data required by the full life cycle of each scheme in combination with the economic evaluation data of yield and investment sensitivity. According to the scheme, the model selection method comprehensively considers factors such as geological reserves, production characteristics, investment and economic evaluation, the oil reservoir potential can be exerted, the full-life-cycle processing and gathering and transportation requirements are met, and meanwhile considerable economical efficiency is achieved.

Description

Technical Field

[0001] The present application relates to the field of oilfield development, and in particular to a method, device and equipment for selecting a floating production, storage and offloading platform for an ultra-deepwater oilfield. Background Art

[0002] The global oceans are rich in oil and gas resources, but the exploration rate is low, making them an important oil and gas replacement area in the future. In the past decade, the newly added reserves and production in the oceans have continued to rise, making them the core area for increasing reserves and production worldwide. However, due to investment restrictions, the number of development wells is small, the well network density is low, and the well network control is low, making it impossible to tap the potential of underground oil reservoirs. Therefore, there is an urgent need for a method for selecting a floating production, storage and offloading platform suitable for ultra-deepwater oil fields. Summary of the invention

[0003] The present application provides a method, device and equipment for selecting a floating production storage and offloading platform for an ultra-deepwater oil field. By comprehensively considering factors such as geological reserves, production characteristics, investment and economic evaluation, the selection method can give full play to the potential of the oil reservoir, meet the processing and gathering and transportation needs throughout the life cycle, and at the same time have considerable economic efficiency.

[0004] According to one aspect of the present application, a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field is provided, the method comprising:

[0005] Determine the reservoir size, reservoir, fault distribution and sedimentary facies characteristics of ultra-deepwater oil fields based on seismic and geological data, and predict the reservoir geological reserves of the reservoir based on the reservoir size, reservoir, fault distribution and sedimentary facies characteristics;

[0006] Based on the production characteristics of the test wells, predict the production characteristics of the reservoir and each single well throughout its life cycle;

[0007] Determining a connection plan between at least one floating production storage and offloading platform and at least one oil reservoir based on the geological reserves and production characteristics of the oil reservoir and the length of the underwater pipeline required for connection with the floating production storage and offloading platform;

[0008] Based on the processing and gathering data required for the entire life cycle of each plan, combined with the economic evaluation data of production and investment sensitivity, the target connection plan, the scale and selection of the floating production storage and offloading platform device are determined.

[0009] According to another aspect of the present application, a device for selecting a floating production storage and offloading platform for an ultra-deepwater oil field is provided, the device comprising:

[0010] The oil reservoir geological reserve prediction module is used to determine the oil reservoir scale, reservoir, fault distribution and sedimentary phase characteristics of ultra-deepwater oil fields based on seismic data and geological data, and predict the oil reservoir geological reserves of the oil reservoir based on the oil reservoir scale, reservoir, fault distribution and sedimentary phase characteristics;

[0011] The production characteristic prediction module is used to predict the production characteristics of the reservoir and each single well throughout its life cycle based on the production characteristics of the test wells;

[0012] A connection scheme determination module, for determining a connection scheme between at least one floating production storage and offloading platform and at least one oil reservoir according to the geological reserves of the oil reservoir, the production characteristics and the length of the underwater pipeline required for connection with the floating production storage and offloading platform;

[0013] The target connection scheme determination module is used to determine the target connection scheme, the scale and selection of the floating production storage and offloading platform device based on the processing and transportation data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity.

[0014] According to another aspect of the present application, an electronic device is provided, the device comprising:

[0015] at least one processor; and

[0016] a memory communicatively connected to at least one processor; wherein,

[0017] The memory stores a computer program that can be executed by at least one processor, and the computer program is executed by at least one processor so that the at least one processor can execute the method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field of any embodiment of the present application.

[0018] According to another aspect of the present application, a computer-readable storage medium is provided, which stores computer instructions, and the computer instructions are used to enable a processor to implement the method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field according to any embodiment of the present application when executed.

[0019] The technical solution of the embodiment of the present application determines the reservoir scale, reservoir, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic data and geological data, and predicts the geological reserves of the reservoir; predicts the production characteristics of the reservoir and each single well throughout the life cycle based on the production characteristics of the test well; determines the connection scheme of at least one floating production storage and offloading platform device and at least one oil reservoir based on the geological reserves of the reservoir, production characteristics and the required underwater pipeline length; determines the target connection scheme, the scale and selection of the floating production storage and offloading platform device based on the processing and gathering data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity. The above scheme can give full play to the potential of the reservoir, meet the processing and gathering needs of the entire life cycle, and have considerable economic efficiency through a selection method that comprehensively considers factors such as geological reserves, production characteristics, investment and economic evaluation.

[0020] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a flow chart of a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field according to Example 1 of the present application;

[0023] Figure 2 This is a flow chart of a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field provided in Example 2 of the present application;

[0024] Figure 3 It is an underwater pipeline diagram of a floating production storage and offloading platform provided according to Example 2 of the present application;

[0025] Figure 4 This is a specific implementation flow chart of a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field provided in Example 3 of the present application;

[0026] Figure 5 It is a structural schematic diagram of a floating production storage and offloading platform selection device for an ultra-deepwater oil field provided according to the fourth embodiment of the present application;

[0027] Figure 6 It is a structural schematic diagram of an electronic device for implementing a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field provided in Example 5 of the present application. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first", "second", "third", "fourth", "actual", "preset", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Embodiment 1

[0031] Figure 1 This is a flowchart of a method for selecting a floating production, storage and offloading platform for an ultra-deepwater oil field provided in Example 1 of the present application. The present application embodiment can be applied to the situation of selecting a floating production, storage and offloading platform suitable for an ultra-deepwater oil field. The method can be executed by a floating production, storage and offloading platform selection device for an ultra-deepwater oil field. The floating production, storage and offloading platform selection device for an ultra-deepwater oil field can be implemented in the form of hardware and / or software. The floating production, storage and offloading platform selection device for an ultra-deepwater oil field can be configured in an electronic device. Figure 1 As shown, the method includes:

[0032] S110. Determine the reservoir size, reservoir, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic and geological data, and predict the reservoir geological reserves of the reservoir based on the reservoir size, reservoir, fault distribution and sedimentary phase characteristics.

[0033] Among them, reservoir size refers to the amount of oil or natural gas that can be stored in the reservoir, which is generally evaluated and described by the enclosed area, enclosed volume, enclosed thickness, enclosed reserves, etc.

[0034] A fault is a crack or fracture surface in the earth's crust. Fault distribution refers to the location, direction and arrangement of faults within a certain geographical range.

[0035] Sedimentary facies characteristics refer to the characteristics of sediments formed under different environmental conditions during the geological history. Common sedimentary facies characteristics include sediment composition, sedimentary structure, fossil content, color and grain size, and lithofacies superposition relationship.

[0036] Specifically, when determining the reservoir size, fault distribution and sedimentary phase characteristics of ultra-deepwater oil fields based on seismic and geological data, four steps are generally followed: interpretation of seismic and geological data, determination of fault distribution through fault analysis, determination of sedimentary phase characteristics through sedimentary phase analysis, and determination of reservoir size. It should be noted that each oil field has its own unique geological characteristics, so the above are only general analysis steps, and the specific determination method will be adjusted and optimized according to actual conditions and data availability. After that, the reservoir geological reserves of the reservoir can be predicted based on the reservoir size, fault distribution and sedimentary phase characteristics.

[0037] S120. Based on the production characteristics of the test wells, predict the production characteristics of the reservoir and each single well throughout its life cycle.

[0038] Among them, production characteristics refer to a series of characteristics exhibited during the production process. Understanding and analyzing production characteristics is of great significance for evaluating the development potential of oil and gas fields, formulating production strategies, and predicting output. Test wells refer to oil wells in the production process in the reservoir.

[0039] In the embodiment of the present application, the production characteristics of the test well can be determined by analyzing and interpreting the test well data to obtain the test analysis results, and the production characteristics of the oil reservoir and each single well in the whole life cycle can be predicted based on the production characteristics of the test well. Optionally, based on similar geological conditions, by referring to the production characteristics of the test well, by establishing analogy and applying empirical rules, the production characteristics of the oil reservoir and each single well in the whole life cycle can be predicted.

[0040] S130. Determine a connection scheme between at least one floating production storage and offloading platform and at least one oil reservoir according to the geological reserves and production characteristics of the oil reservoir and the length of the underwater pipeline required for connection with the floating production storage and offloading platform.

[0041] Among them, a floating production, storage and offloading platform (FPSO) is an offshore facility with oil and gas processing and storage capabilities, used for production, storage and export in offshore oil and gas fields. It combines the functions of an oil storage vessel and a production platform, is usually connected to one or more production wells, and completes the collection and storage of produced oil and gas through underwater pipelines. Floating production, storage and offloading platforms have the advantages of rapid deployment, strong adaptability and high mobility, and are widely used in offshore oil and gas development projects, especially for oil and gas fields with larger water depths.

[0042] It is understood that when determining the connection scheme between the floating production storage and offloading platform and at least one oil reservoir, in addition to the reservoir geological reserves and production characteristics of the oil reservoir, it is also necessary to consider the length of the underwater pipeline required for connecting the oil reservoir and the floating production storage and offloading platform. Generally speaking, the length of the underwater pipeline can be determined based on the distance between the oil reservoir and the floating production storage and offloading platform and the water depth. In addition, it should be noted that considering the feasibility of pipeline laying, maintenance and operation, it is also necessary to evaluate the diameter, material selection and pressure bearing capacity of the underwater pipeline.

[0043] In the embodiment of the present application, after determining the geological reserves of the oil reservoir, the production characteristics and the length of the underwater pipeline required for connection with the floating production, storage and offloading platform, the connection scheme between the floating production, storage and offloading platform and at least one oil reservoir can be determined by comprehensively considering the above three important factors.

[0044] S140. Determine the target connection scheme, the scale and type of floating production storage and offloading platform device based on the processing and transportation data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity.

[0045] Among them, the resource processing capacity data is used to evaluate the processing capacity and production capacity of the floating production, storage and offloading platform, the economic evaluation data is used to evaluate the economic feasibility of the floating production, storage and offloading platform, and the output investment sensitivity analysis data is used to evaluate the relationship between the output and investment of the floating production, storage and offloading platform, and to evaluate its sensitivity to changes in different parameters.

[0046] It is understandable that when determining the connection scheme between the floating production storage and offloading platform and at least one oil reservoir, at least one connection scheme that meets the requirements can be obtained. In the embodiment of the present application, according to the actual situation, by analyzing and evaluating the resource processing capacity data, economic evaluation data, and production investment sensitivity analysis data of the floating production storage and offloading platform of each connection scheme, the most suitable connection scheme, i.e., the target connection scheme, can be determined from at least one connection scheme.

[0047] The technical solution of the embodiment of the present application determines the reservoir scale, reservoir, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic data and geological data, and predicts the geological reserves of the reservoir; predicts the production characteristics of the reservoir and each single well throughout the life cycle based on the production characteristics of the test well; determines the connection scheme of at least one floating production storage and offloading platform device and at least one oil reservoir based on the geological reserves of the reservoir, production characteristics and the required underwater pipeline length; determines the target connection scheme, the scale and selection of the floating production storage and offloading platform device based on the processing and gathering data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity. The above scheme can give full play to the potential of the reservoir, meet the processing and gathering needs of the entire life cycle, and have considerable economic efficiency through a selection method that comprehensively considers factors such as geological reserves, production characteristics, investment and economic evaluation.

[0048] Embodiment 2

[0049] Figure 2 This is a flow chart of a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field provided in Example 2 of this application. This embodiment of this application is optimized based on the above embodiment. For solutions not fully described in the embodiment of this application, please refer to the above embodiment. Figure 2 As shown, the method of the embodiment of the present application specifically includes the following steps:

[0050] S210. Determine the reservoir size, reservoir, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic and geological data, and predict the reservoir geological reserves of the reservoir based on the reservoir size, reservoir, fault distribution and sedimentary phase characteristics.

[0051] In the embodiment of the present application, when determining the reservoir scale, reservoir, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic data and geological data, the first step is to determine the fault distribution of the ultra-deepwater oil field.

[0052] Specifically, based on seismic and geological data, the reservoir size, reservoir, fault distribution and sedimentary phase characteristics of ultra-deepwater oil fields are determined, including:

[0053] Based on the 3D seismic data of the seabed, the synthetic seismic records are calibrated to determine the seismic reflection characteristics of each target layer;

[0054] A three-dimensional structural interpretation is carried out based on the seismic reflection characteristics of each layer to determine the fault distribution of the oil reservoir.

[0055] According to the three-dimensional seismic data of the seabed, the method of calibrating synthetic seismic records can be used to determine the seismic reflection characteristics of each target layer. This process usually includes the following steps: 1. Seismic simulation, using seismic simulation software to generate synthetic seismic records based on seismic data and geological models. Seismic simulation can be performed based on the geological attributes, velocity model and wave source parameters of the target layer. 2. Inversion analysis, comparing the synthetic seismic records with the actual observed seismic data, and determining the seismic reflection characteristics of the target layer by inversion analysis. Inversion can use various seismic processing and interpretation techniques, such as reflection amplitude analysis, travel time analysis, frequency analysis, etc. 3. Calibration fitting, comparing the synthetic seismic records with the actual observed data, and adjusting parameters and calibration fitting, so that the synthetic seismic records can more accurately reflect the seismic reflection characteristics of the target layer. This step includes adjusting seismic simulation parameters, velocity model, filtering parameters, etc. 4. Interpretation analysis, based on the results after calibrating the synthetic seismic records, interpret and analyze the seismic reflection characteristics of the target layer, including determining the position of the reflection interface, changes in reflection amplitude, changes in lithology, etc. By calibrating synthetic seismic records, we can further understand the geological characteristics of the target layer and help make decisions on oil and gas exploration and development. Therefore, we can determine the seismic reflection characteristics of each target layer, and conduct three-dimensional structural interpretation based on the seismic reflection characteristics of each layer, complete layer tracking and fault combination, and determine the fault distribution of the reservoir.

[0056] After the fault distribution of the oil reservoir is determined, the reservoir size and sedimentary phase characteristics of the ultra-deepwater oil field can be determined based on seismic data and geological data, and the geological reserves of the oil reservoir can be predicted based on the reservoir size, reservoir, fault distribution and sedimentary phase characteristics.

[0057] Specifically, the oil reservoir scale, reservoir, fault distribution and sedimentary facies characteristics of ultra-deepwater oil fields are determined based on seismic data and geological data, and the oil reservoir geological reserves of the oil reservoir are predicted based on the oil reservoir scale, reservoir, fault distribution and sedimentary facies characteristics, including:

[0058] For single well phases in the reservoir, the sedimentary phase is determined based on the seismic phase;

[0059] Determining the geological reserves of the oil reservoir of the single well phase according to the well logging curve of the single well phase;

[0060] According to the continuity characteristics of the sedimentary phase in the oil reservoir, the geological reserves of the oil reservoir outside the single well phase are determined.

[0061] Among them, single well phase refers to the change in rock type or lithology observed in a single well. Single well phase analysis is to identify and interpret the properties and composition of formation rocks through information such as core samples, measurement data and seismic data obtained during the drilling process. Seismic phase refers to the seismic phase in the seismic record, which is the characteristic manifestation of different types of waveforms during the propagation of seismic waves underground.

[0062] Based on the single well phase and combined with the seismic phase characteristics, the sedimentary phases of different layers can be determined. At the same time, due to the continuity of the sedimentary phase, the geological reserves of the reservoirs in the single well phase determined by the well logging curve of the single well phase can be referred to to determine the geological reserves of the reservoirs outside the single well phase. In this way, the scale of the reservoirs in the ultra-deepwater oilfield can be determined.

[0063] S220. Determine the pore type, flow boundary and inter-well interference data of the test well based on the test well interpretation results, and determine the oil production capacity data and liquid production capacity data based on the relative permeability results.

[0064] Among them, pore type refers to the different types of pore structures existing in different rocks. Flow boundary refers to the regional boundary where fluid movement exists in geology or fluid dynamics, such as the oil-water interface. Interwell interference data refers to the measurement data generated by the interaction between wells during the development of an oil field. Oil production capacity data and liquid production capacity data are data that evaluate or describe the oil production capacity and gas production capacity of an oil well or oil field, respectively. The pore type, flow boundary, interwell interference data, oil production capacity data, and liquid production capacity data of the test well are the production characteristics of the test well.

[0065] In the embodiment of the present application, the pore type, flow boundary and inter-well interference data of the test well can be determined through the test well interpretation results, while the oil production capacity data and liquid production capacity data are determined through the relative permeability results.

[0066] S230. Predict the production characteristics of the reservoir and each single well throughout their life cycle based on production test data, pore types, flow boundaries, well interference data, oil production capacity data, and liquid production capacity data.

[0067] In the embodiment of the present application, the production characteristics of the oil reservoir and each single well throughout the life cycle are predicted based on the test production data, pore type, flow boundary, well-to-well interference data, oil production capacity data, and liquid production capacity data, that is, the production characteristics of the oil reservoir and each single well throughout the life cycle are predicted based on the test production data and the production characteristics of the test production well. Optionally, based on similar geological conditions, by referring to the production characteristics of the test production well and the test production data, by establishing an analogy relationship and applying empirical rules, the production characteristics of the oil reservoir and each single well throughout the life cycle can be predicted. Among them, the initial production capacity and long-term production influencing factors can be determined through the test production data.

[0068] S240. Determine the number and distribution of injection and production wells and the number of floating production, storage and offloading platforms based on the required reserve range of the floating production, storage and offloading platform, the geological reserves and production characteristics of the oil reservoir, the required length of the underwater pipeline and the length of the underwater pipeline required to connect the injection and production wells to the floating production, storage and offloading platform.

[0069] In the embodiments of the present application, the required reserve range of the floating production storage and offloading platform should match the geological reserves and production characteristics of the oil reservoir. By studying the geological reserves and production characteristics of the oil reservoir, the single well production capacity and oil production potential of the oil well can be determined, which will help determine the number and distribution pattern of reasonable injection and production wells. The required length of the underwater pipeline should match the length of the underwater pipeline required to connect the injection and production wells with the floating production storage and offloading platform. The length of the underwater pipeline is determined based on the distance between the injection and production wells and the floating production storage and offloading platform and the transportation capacity of the underwater pipeline, which will affect the layout and connection plan of the injection and production wells. By way of example, Figure 3 An underwater pipeline diagram of a floating production storage and offloading platform is shown. As shown in the figure, the floating production storage and offloading platform is located above water, and the injection and production wells are located underwater, and the two are connected through the underwater pipeline in the middle. Thus, the number and distribution of the injection and production wells and the number of floating production storage and offloading platforms can be determined. It can be understood that there is more than one number and distribution of the injection and production wells and the number of floating production storage and offloading platforms that meet the above premise.

[0070] S250: Determine a connection scheme between at least one floating production storage and offloading platform and at least one oil reservoir according to the number and distribution of injection and production wells and the number of floating production storage and offloading platforms.

[0071] In the embodiment of the present application, when determining the connection scheme between the floating production storage and offloading platform and at least one oil reservoir, different connection schemes can be formulated according to the number and distribution of different injection and production wells and the number of floating production storage and offloading platforms. It should be noted that when determining the connection scheme, the position of the floating production storage and offloading platform needs to be considered, that is, the relative position of the floating production storage and offloading platform and the underwater wellhead is reasonable, the total length of the underwater pipeline is the shortest, the seabed topography and engineering geological conditions, etc.

[0072] S260. Determine the target connection scheme, the scale and type of floating production storage and offloading platform device based on the processing and transportation data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity.

[0073] In the embodiment of the present application, before determining the target connection solution, it is necessary to first determine the resource processing capacity data of the floating production storage and offloading platform.

[0074] Specifically, the process of determining resource processing capacity data includes: determining the oil, gas and water processing capacity of the floating production storage and offloading platform based on the oil and gas production, production oil-gas ratio and water content change data of the injection and production wells connected to the floating production storage and offloading platform.

[0075] By connecting the oil and gas production, production oil-gas ratio and water content change data of the injection and production wells of the floating production storage and offloading platform, the oil production, gas production and water production of the injection and production wells can be calculated. The oil production, gas production and water production of the injection and production wells are also the oil processing capacity, gas processing capacity and water processing capacity of the floating production storage and offloading platform. For example, Table 1 shows the processing capacity table of the floating production storage and offloading platform, which includes the oil, gas and water processing capacity of the floating production storage and offloading platform of different production units, as well as other related contents.

[0076] Table 1 Processing capacity of floating production storage and offloading platform

[0077]

[0078] After determining the resource processing capacity data of the floating production storage and offloading platform, the target connection scheme can be determined based on the resource processing capacity data of the floating production storage and offloading platform, economic evaluation data, and production investment sensitivity analysis data of each connection scheme.

[0079] Specifically, based on the processing and gathering data required for the entire life cycle of each solution, combined with the economic evaluation data of production and investment sensitivity, the target connection solution, the scale and selection of the floating production storage and offloading platform device are determined, including:

[0080] Under the condition that the resource processing capacity data of the floating production storage and offloading platform of each connection scheme meets the resource production volume of the connected injection and production wells, economic evaluation is performed to obtain economic evaluation data, and production investment sensitivity analysis is performed to determine production investment sensitivity analysis data;

[0081] Determine the target connection plan based on economic evaluation data and output investment sensitivity analysis data.

[0082] It is understandable that when determining the connection scheme between the floating production storage and offloading platform and at least one oil reservoir, at least one connection scheme that meets the requirements can be obtained. In the embodiment of the present application, according to the actual situation, when the resource processing capacity data of the floating production storage and offloading platform of each connection scheme meets the resource production of the connected injection and production well, the most suitable connection scheme, i.e., the target connection scheme, can be determined from at least one connection scheme by analyzing and evaluating the economic evaluation data and the production investment sensitivity analysis data of the floating production storage and offloading platform of each connection scheme.

[0083] The embodiment of the present application provides a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field, which determines the reservoir scale, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic data and geological data, and predicts the reservoir geological reserves of the reservoir based on the reservoir scale, fault distribution and sedimentary phase characteristics; determines the pore type, flow boundary and well interference data of the test well based on the test well interpretation results, and determines the oil production capacity data and liquid production capacity data based on the relative permeability realization results; predicts the entire life cycle of the reservoir and each single well based on the test production data, pore type, flow boundary, well interference data, oil production capacity data and liquid production capacity data The production characteristics of the period; according to the reserve requirement range of the floating production storage and offloading platform and the geological reserves and production characteristics of the oil reservoir, the required length of the underwater pipeline and the length of the underwater pipeline required for the connection between the injection and production wells and the floating production storage and offloading platform, determine the number and distribution of the injection and production wells and the number of floating production storage and offloading platforms; according to the number and distribution of the injection and production wells and the number of floating production storage and offloading platforms, determine the connection scheme between the floating production storage and offloading platform and at least one oil reservoir; according to the resource processing capacity data, economic evaluation data and production investment sensitivity analysis data of the floating production storage and offloading platform of each connection scheme, determine the target connection scheme. The technical scheme of the embodiment of the present application can give full play to the potential of the oil reservoir, meet the processing and gathering and transportation needs of the whole life cycle, and have considerable economic efficiency through a selection method that comprehensively considers factors such as geological reserves, production characteristics, investment and economic evaluation.

[0084] Embodiment 3

[0085] Figure 4 The specific implementation flow chart of the method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field provided in the third embodiment of the present application provides a preferred embodiment based on the above embodiment, which is as follows:

[0086] S310. Based on the regional structural characteristics and according to the seismic data, the synthetic seismic records are calibrated to obtain the seismic reflection characteristics of each target layer, and three-dimensional structural interpretation is carried out to complete layer tracking and fault combination.

[0087] S320. Based on the single well phase and combined with the seismic phase characteristics, the sedimentary phase profile characteristics are studied, and the planar distribution characteristics of sedimentary phases in different layers are studied.

[0088] S330. Predict the geological reserves of an oil reservoir based on its size, reservoir, fault distribution and sedimentary phase characteristics.

[0089] S340. Determine the pore type, flow boundary and inter-well interference data based on the well test interpretation results, evaluate the oil and liquid production capabilities based on the relative permeability test results, and determine the factors affecting the initial production capacity and long-term production based on the test production data.

[0090] S350. Analyze the changing characteristics of the oil production index of the test wells, combine the production pressure difference, and guide the production allocation and long-term production change rules of single wells in different structural locations.

[0091] S360. Considering the changing characteristics of the reserve distribution of the entire oil field and the total length of the underwater pipelines, formulate plans for different numbers and distributions of injection and production wells and the number of floating production, storage and offloading platforms.

[0092] S370. Determine the oil, gas and water processing capacity range required for the floating production storage and offloading platforms based on the production well capacity, production gas-oil ratio and water content variation patterns of the platforms.

[0093] S380. For each well site deployment and production plan, estimate various investments and operating costs, conduct economic evaluation, and perform sensitivity analysis on production and investment, and accordingly optimize the scale of each floating production storage and offloading platform.

[0094] The solution of the embodiment of the present application can be applied to a large-scale integrated deep-water oil reservoir in a certain area, and the oil-bearing area of ​​the oil reservoir is 500km 2 The average oil layer thickness of a single well is 225m, the average porosity is 12.5%, the average permeability is 400mD, the interlayer is discontinuous laterally, the reservoir has a unified pressure system and oil-water interface, and is a giant blocky edge-bottom water carbonate reservoir. The crude oil has a gravity of 27°API, a viscosity of 0.7mPa.s, and an original dissolved gas-oil ratio of 270m 3 / m 3 , CO2 content 20%, water-gas alternating drive production by re-injection of produced natural gas. The average initial production of each unit well in the reservoir is 5,000 tons / day, and the rolling study of seabed node seismic data shows that the structure, reserves and production capacity distribution of the reservoir have changed. Through the above technical solution, the production well combination is readjusted, the development units are optimized and reduced, and after economic evaluation and calculation, the scale selection of 11 floating production storage and offloading platforms is optimized.

[0095] The solution of the embodiment of the present application can also be applied to a deep-water massive edge-bottom water carbonate reservoir in a certain area, where the oil-bearing area of ​​the reservoir is 300km 2 The average oil layer thickness of a single well is 230m, the average porosity is 12%, the average permeability is 180mD, the interlayer development is unstable, and the reservoir has a unified pressure system and oil-water interface. The crude oil has a gravity of 27°API, a viscosity of 0.4mPa.s, and an original dissolved gas-oil ratio of 600m 3 / m 3, CO2 content 40%, water-gas alternating drive production by re-injection of produced natural gas. The oilfield adopts four production unit scale selection, and through the above technical scheme, the oil, gas and water processing capacity of a single floating production storage and offloading platform is determined. The IRR of the economic evaluation of each floating production storage and offloading platform exceeds 20%.

[0096] The embodiments of the present application have the same beneficial effects as the above embodiments.

[0097] Embodiment 4

[0098] Figure 5 This is a schematic diagram of the structure of a floating production storage and offloading platform selection device for ultra-deepwater oil fields provided in Example 4 of the present application. The device can execute the floating production storage and offloading platform selection method for ultra-deepwater oil fields provided in any embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method. Figure 5 As shown, the device comprises:

[0099] The oil reservoir geological reserve prediction module 410 is used to determine the oil reservoir scale, reservoir, fault distribution and sedimentary phase characteristics of the ultra-deepwater oil field based on seismic data and geological data, and predict the oil reservoir geological reserve of the oil reservoir based on the oil reservoir scale, reservoir, fault distribution and sedimentary phase characteristics;

[0100] The production characteristic prediction module 420 is used to predict the production characteristics of the reservoir and each single well throughout the life cycle according to the production characteristics of the test well;

[0101] A connection scheme determination module 430 is used to determine a connection scheme between at least one floating production storage and offloading platform and at least one oil reservoir according to the geological reserves and production characteristics of the oil reservoir and the length of the underwater pipeline required for connection with the floating production storage and offloading platform;

[0102] The target connection scheme determination module 440 is used to determine the target connection scheme, the scale and selection of the floating production storage and offloading platform device based on the processing and transportation data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity.

[0103] Optionally, the oil reservoir geological reserve prediction module 410 includes:

[0104] A seismic reflection characteristic determination unit is used to calibrate synthetic seismic records and determine seismic reflection characteristics of each target layer based on three-dimensional seismic data of the seabed;

[0105] The fault distribution determination unit is used to carry out three-dimensional structural interpretation according to the seismic reflection characteristics of each layer and determine the fault distribution of the oil reservoir.

[0106] Optionally, the oil reservoir geological reserve prediction module 410 includes:

[0107] A sedimentary facies determination unit is used to determine the sedimentary facies according to the seismic facies for a single well in the reservoir;

[0108] A first oil reservoir geological reserve determination unit, used to determine the oil reservoir geological reserve of the single well phase according to the well logging curve of the single well phase;

[0109] The second reservoir geological reserve determination unit is used to determine the reservoir geological reserves within the range outside the single well phase according to the continuity characteristics of the sedimentary phase in the reservoir.

[0110] Optionally, the yield characteristic prediction module 420 includes:

[0111] The production characteristic determination unit is used to determine the pore type, flow boundary and well interference data of the test well according to the test well interpretation results, and determine the oil production capacity data and liquid production capacity data according to the relative permeability realization results;

[0112] The production characteristic prediction unit is used to predict the production characteristics of the reservoir and each single well throughout the life cycle based on the test production data, pore type, flow boundary, well interference data, oil production capacity data and liquid production capacity data.

[0113] Optionally, the connection scheme determination module 430 includes:

[0114] The first data determination unit is used to determine the number and distribution of injection and production wells and the number of floating production storage and offloading platforms according to the reserve requirement range of the floating production storage and offloading platform, the geological reserves and production characteristics of the oil reservoir, the required length of the underwater pipeline and the length of the underwater pipeline required for connecting the injection and production wells with the floating production storage and offloading platform;

[0115] The connection scheme determining unit is used to determine the connection scheme between the floating production storage and offloading platform and at least one oil reservoir according to the number and distribution of the injection and production wells and the number of the floating production storage and offloading platforms.

[0116] Optionally, the target connection scheme determination module 440 includes:

[0117] The resource processing capability data determination unit is used to:

[0118] The processing capacity of oil, gas and water of the floating production storage and offloading platform is determined according to the oil and gas production, production oil-gas ratio and water content change data of the injection and production wells connected to the floating production storage and offloading platform.

[0119] Optionally, the target connection scheme determination module 440 includes:

[0120] The second data determination unit is used to perform economic evaluation to obtain economic evaluation data when the resource processing capacity data of the floating production storage and offloading platform of each connection scheme meets the resource production volume of the connected injection and production wells, and to perform production investment sensitivity analysis to determine production investment sensitivity analysis data;

[0121] The target connection scheme determination unit is used to determine the target connection scheme based on the economic evaluation data and the output investment sensitivity analysis data.

[0122] A floating production, storage and offloading platform selection device for an ultra-deepwater oilfield provided in an embodiment of the present application can execute a floating production, storage and offloading platform selection method for an ultra-deepwater oilfield provided in any embodiment of the present application, and has functional modules and beneficial effects corresponding to the execution method.

[0123] Embodiment 5

[0124] Figure 6 A schematic diagram of an electronic device 10 that can be used to implement an embodiment of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0125] like Figure 6 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0126] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0127] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field.

[0128] In some embodiments, the method for selecting a floating production, storage and offloading platform for an ultra-deepwater oil field may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for selecting a floating production, storage and offloading platform for an ultra-deepwater oil field described above may be executed. Alternatively, in other embodiments, the processor 11 may be configured to execute the method for selecting a floating production, storage and offloading platform for an ultra-deepwater oil field in any other appropriate manner (e.g., by means of firmware).

[0129] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0130] The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable ultra-deepwater oilfield floating production storage and offloading platform selection device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0131] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device or equipment. A computer readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. A more specific example of a machine readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0132] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0133] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0134] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0135] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the information expected by the technical solution of this application can be achieved, and this document is not limited here.

[0136] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A method for selecting a floating production storage and offloading platform for an ultra-deepwater oil field, characterized in that: The method comprises: Determine the reservoir size, reservoir, fault distribution and sedimentary facies characteristics of ultra-deepwater oil fields based on seismic and geological data, and predict the reservoir geological reserves of the reservoir based on the reservoir size, reservoir, fault distribution and sedimentary facies characteristics; Based on the production characteristics of the test wells, predict the production characteristics of the reservoir and each single well throughout its life cycle; Determining a connection plan between at least one floating production storage and offloading platform and at least one oil reservoir based on the geological reserves and production characteristics of the oil reservoir and the length of the underwater pipeline required for connection with the floating production storage and offloading platform; Based on the processing and gathering data required for the entire life cycle of each plan, combined with the economic evaluation data of production and investment sensitivity, the target connection plan, the scale and selection of the floating production storage and offloading platform device are determined.

2. The method according to claim 1, characterized in that Based on seismic and geological data, the reservoir size, reservoir, fault distribution and sedimentary phase characteristics of ultra-deepwater oil fields are determined, including: Based on the 3D seismic data of the seabed, the synthetic seismic records are calibrated to determine the seismic reflection characteristics of each target layer; A three-dimensional structural interpretation is carried out based on the seismic reflection characteristics of each layer to determine the fault distribution of the oil reservoir.

3. The method according to claim 1, characterized in that Based on seismic and geological data, the reservoir size, reservoir, fault distribution and sedimentary facies characteristics of ultra-deepwater oil fields are determined, and the geological reserves of the reservoirs are predicted based on the reservoir size, reservoir, fault distribution and sedimentary facies characteristics, including: For single well phases in the reservoir, the sedimentary phase is determined based on the seismic phase; Determining the geological reserves of the oil reservoir of the single well phase according to the well logging curve of the single well phase; According to the continuity characteristics of the sedimentary phase in the oil reservoir, the geological reserves of the oil reservoir outside the single well phase are determined.

4. The method according to claim 1, characterized in that: Based on the production characteristics of the test wells, the production characteristics of the reservoir and each single well throughout their life cycle are predicted, including: According to the well test interpretation results, determine the pore type, flow boundary and well interference data of the test well, and determine the oil production capacity data and liquid production capacity data according to the relative permeability results; Based on the test production data, pore type, flow boundary, well interference data, oil production capacity data and liquid production capacity data, the production characteristics of the reservoir and each single well throughout their life cycle are predicted.

5. The method according to claim 1, characterized in that Determine a connection plan between at least one floating production storage and offloading platform and at least one oil reservoir based on the geological reserves and production characteristics of the oil reservoir and the length of the underwater pipeline required for connection with the floating production storage and offloading platform, including: Determine the number and distribution of injection and production wells and the number of floating production, storage and offloading platforms based on the required reserve range of the floating production, storage and offloading platform, the geological reserves and production characteristics of the oil reservoir, the required length of the underwater pipeline and the length of the underwater pipeline required to connect the injection and production wells to the floating production, storage and offloading platform; A connection scheme between the floating production storage and offloading platform and at least one oil reservoir is determined according to the number and distribution of injection and production wells and the number of floating production storage and offloading platforms.

6. The method according to claim 1, characterized in that The process of determining resource processing capacity data includes: The processing capacity of oil, gas and water of the floating production storage and offloading platform is determined according to the oil and gas production, production oil-gas ratio and water content change data of the injection and production wells connected to the floating production storage and offloading platform.

7. The method according to claim 1, characterized in that Based on the processing and gathering data required for the entire life cycle of each solution, combined with the economic evaluation data of production and investment sensitivity, the target connection solution, the scale and selection of the floating production storage and offloading platform device are determined, including: Under the condition that the resource processing capacity data of the floating production storage and offloading platform of each connection scheme meets the resource production volume of the connected injection and production wells, economic evaluation is performed to obtain economic evaluation data, and production investment sensitivity analysis is performed to determine production investment sensitivity analysis data; Determine the target connection plan based on economic evaluation data and output investment sensitivity analysis data.

8. A device for selecting a floating production storage and offloading platform for ultra-deepwater oil fields, characterized in that: The device comprises: The oil reservoir geological reserve prediction module is used to determine the oil reservoir scale, reservoir, fault distribution and sedimentary phase characteristics of ultra-deepwater oil fields based on seismic data and geological data, and predict the oil reservoir geological reserves of the oil reservoir based on the oil reservoir scale, reservoir, fault distribution and sedimentary phase characteristics; The production characteristic prediction module is used to predict the production characteristics of the reservoir and each single well throughout its life cycle based on the production characteristics of the test wells; A connection scheme determination module, for determining a connection scheme between at least one floating production storage and offloading platform and at least one oil reservoir according to the geological reserves of the oil reservoir, the production characteristics and the length of the underwater pipeline required for connection with the floating production storage and offloading platform; The target connection scheme determination module is used to determine the target connection scheme, the scale and selection of the floating production storage and offloading platform device based on the processing and transportation data required for the entire life cycle of each scheme, combined with the economic evaluation data of production and investment sensitivity.

9. An electronic device, characterized in that: The device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for selecting a floating production, storage and offloading platform for an ultra-deepwater oil field as described in any one of claims 1-7.

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