CN-121980700-A - Fracturing equipment integrated tool design method and device based on offshore mobile platform

CN121980700ACN 121980700 ACN121980700 ACN 121980700ACN-121980700-A

Abstract

The invention discloses a fracturing equipment integrated tool design method and device based on an offshore mobile platform, wherein the method comprises the steps of constructing an optimized parameter system consisting of fracturing equipment parameters, tool structure parameters, platform adaptation parameters and operation constraint parameters; constructing an objective function which aims at maximizing space utilization rate and fracturing displacement standard reaching rate and a constraint function which covers structural safety, operation functions and platform adaptation, solving parameters based on SACS modeling, CFD simulation and a hybrid optimization algorithm, and obtaining an integrated tool with an optimal configuration. The invention not only can obviously reduce the total weight of the fracturing equipment integrated tool, but also can obviously reduce the installation time of the device on the offshore mobile platform and the installation difficulty of the device, thereby obviously reducing the cost of the fracturing equipment integrated tool.

Inventors

XU CHANGGUI
SUN DONGZHENG
LIU HEXING
ZHAO QIBIN
MA LEI
XU FABIN
Liao Xingao
TONG YUE

Assignees

中海石油(中国)有限公司湛江分公司

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. A fracturing equipment integrated tool design method based on an offshore mobile platform is characterized by comprising the following steps: S1, constructing an optimization parameter system; S2, constructing an objective function and a constraint function; and S3, solving the optimized parameter system constructed in the step S1 based on the objective function and the constraint function established in the step S2 to obtain the integrated tool with the optimal configuration.
2. The method for designing the integrated tool of the fracturing equipment based on the offshore mobile platform according to claim 1, wherein the optimized parameter system comprises fracturing equipment parameters, tool structure parameters, platform adaptation parameters and operation constraint parameters.
3. The method for designing the integrated tool of the fracturing equipment based on the offshore mobile platform, which is disclosed in claim 2, is characterized in that the parameters of the fracturing equipment comprise the number of core equipment, the overall dimension, the weight, the barycentric coordinates and the working load of each core equipment, the parameters of the tool structure comprise the number of modular tool layers, the net height among modular tool layers, the section dimension of a supporting beam, the type of a connecting node, the length of a sliding rail and the traction force parameters of a sliding mechanism, the parameters of the platform adaptation comprise the available area of a deck, the bearing threshold of different areas, the working radius of a cantilever beam, the maximum hoisting capacity of a crane and the capacity of a mud pit, and the parameters of the working constraint comprise the fracturing target displacement, the threshold of equipment operation and maintenance space, the minimum curvature radius of a pipeline and the upper limit of a safe load.
4. The method for designing the fracturing equipment integration tool based on the offshore mobile platform according to claim 1, wherein the objective function is double-objective with maximized space utilization rate and maximized fracturing displacement standard reaching rate; The mathematical expression of the objective function is: ; Wherein: ; 。
5. The fracturing equipment integrated tool design method based on the offshore mobile platform, as set forth in claim 1, is characterized in that the constraint function is a triple constraint system consisting of structural safety constraint, operation function constraint and platform adaptation constraint; the structural safety constraint comprises a support beam stress utilization factor UC less than or equal to 1, a node maximum Z-displacement less than or equal to Liang Kuaju/240, a device hoisting load less than or equal to the rated load of a crane and a tool total load less than or equal to the safe load of a deck area; The operation function constraint comprises that the equipment spacing is more than or equal to 0.65m, the wind speed of a heat dissipation channel of a fracturing pump is more than or equal to 3m/s, and the traction force of a sliding mechanism is less than or equal to the rated traction force of a winch; the platform adaptation constraint comprises that the overall dimension of the tool does not exceed the boundary of a deck, the projection of the gravity center of equipment falls in the range of a main spandrel girder of the platform, and the pipeline layout and the existing facilities of the platform have no conflict.
6. The method for designing the fracturing equipment integration tool based on the offshore mobile platform according to claim 1, wherein the step S3 specifically comprises the following steps: S31, automatically generating a plurality of groups of feasible initial arrangement schemes through an integration tool by combining the constraint boundary of the optimized parameter system constructed in the step S1 based on engineering practice rules of offshore oil engineering equipment layout; S32, establishing a mechanical model of a tool structure, simulating the stress condition of the tool under the operation load and the hoisting load, and outputting core structure data, analyzing the heat dissipation characteristics of equipment, and outputting key heat dissipation data; and S33, solving by adopting a steepest descent method and genetic algorithm hybrid optimization strategy to obtain the integrated tool with the optimal configuration.
7. The method for designing the fracturing equipment integration tool based on the offshore mobile platform according to claim 6, wherein the production quantity of the initial arrangement scheme is 30-100 groups according to the conventional quantity of ocean engineering multi-scheme comparison.
8. The method for designing the integrated tool of the fracturing equipment based on the offshore mobile platform as set forth in claim 6, wherein the mechanical model of the tool structure is established by SACS software applied in the field of ocean engineering, and the core structure data comprises parameters of support beam stress utilization factor, node Z-direction displacement, tool overall weight and support beam section size adaptability The device heat radiation characteristic analysis adopts an integrated ANSYS Fluent CFD simulation module, and the key heat radiation data comprises the average temperature of a device dense region, the wind speed distribution of a heat radiation channel, the position of a hot spot region, a temperature value and a fan adaptive power requirement.
9. An integrated tooling design device for a fracturing device based on an offshore mobile platform for implementing the method of one of claims 1 to 8, comprising: The parameter selection module is configured to select an optimized parameter system and support data import; the function construction module is configured to construct an objective function and a constraint function; The optimization execution module is configured to solve and output an optimal configuration through modeling, simulation and algorithm; and the verification module is configured to finish strength, hoisting and compatibility verification.
10. The fracturing equipment integrated tool design device based on the offshore mobile platform, as set forth in claim 9, wherein the optimization execution module integrates a SACS structure modeling plug-in, a CFD simulation module and a steepest descent method+genetic algorithm hybrid optimization strategy, the solving time is less than or equal to 30 minutes, and the parameter optimizing precision is more than or equal to 99%.

Description

Fracturing equipment integrated tool design method and device based on offshore mobile platform Technical Field The invention belongs to the technical field of offshore oil and gas development equipment optimization, and particularly relates to a fracturing equipment integration tool design method and device based on an offshore mobile platform. Background The offshore shale oil resource reserves are rich, and the areas such as the northern bay of the south China sea, the Bohai sea and the like have ascertained that the total resource quantity reaches hundreds of millions of tons, so that the offshore shale oil resource reserves are important strategic reserves for guaranteeing the national energy safety. Along with shale oil exploitation technology iteration, large-scale fracturing operation becomes a core technology path for improving recovery efficiency, and the core requirements are intensively reflected in 'large discharge capacity (not less than 10m 3/min), high sand quantity (thousand square steps) and long-time continuous operation', and domestic and foreign industry practice clearly develops towards the fracturing technology direction of dense cutting and high power. However, the inherent characteristics of offshore mobile platforms create multiple severe constraints on fracturing operations, becoming a key bottleneck restricting the large-scale development of offshore shale oil, particularly in the following three aspects: Space constraint is maximized, the available area of a platform deck is limited, a conventional 2500 type fracturing pump is taken as an example, the area of the deck is required to be occupied by the planar arrangement of 6 equipment, the maximum available area of a main deck of a drilling ship and a cantilever Liang Jiaban is only 450m 2~500m2, the space limitation of a jacket platform is more prominent, the equipment deployment requirement of large-scale fracturing cannot be met, the operation space is insufficient due to equipment arrangement congestion, and potential safety hazards are easily caused. The load bearing capacity is differentiated, the load threshold value difference of unit area of different areas (pipe rack area, non-pipe rack area and below the cantilever beam) of the platform deck is obvious (1.2 t/m 2~2.0t/m2), the tiling arrangement of the traditional heavy type integrated fracturing equipment easily causes the local load to exceed the standard, the safety of the platform structure is influenced, the operation scale is difficult to be lifted by simply increasing the number of the equipment, and the fracturing operation efficiency is limited. The integration technology is deficient in that the existing equipment is lack of a targeted modularized design, small auxiliary equipment (a liquid adding pump and a generator pry) is arranged in a mixed mode with a large fracturing pump and a sand tank, space is further wasted, meanwhile, equipment hoisting is limited by the operation range of a cantilever beam and the crane capacity, the space utilization rate is lower than 30% due to poor hoisting accessibility of a part of areas, the problems of low heat dissipation efficiency (the temperature of an equipment dense area exceeds 85 ℃), the pipeline layout is disordered and the like are also derived, and the equipment maintenance difficulty and the operation fault risk are increased. The mature land high-density fracturing technology cannot be directly migrated due to special working conditions such as space, bearing and hoisting of an offshore platform, and a special tooling technology which is suitable for three-dimensional layout, modularized integration and efficient positioning of offshore scenes is not formed in the current industry, so that the requirements of offshore large-scale fracturing operation are difficult to meet. Therefore, the development of the fracturing equipment integrated tool optimization scheme with strong adaptability and safety and high efficiency becomes a core requirement for breaking through the development bottleneck of the offshore shale oil. Disclosure of Invention The invention provides a fracturing equipment integration tool design method and device based on an offshore mobile platform, which are used for solving the problems of low space utilization rate, poor bearing matching, difficult equipment positioning, insufficient operation efficiency and the like in the fracturing operation of the mobile platform caused by limited space, bearing differentiation and integration technology deficiency of the offshore mobile platform in the prior art. The invention is realized by the following technical scheme: A fracturing equipment integration tool design method based on an offshore mobile platform comprises the following steps: S1, constructing an optimization parameter system; S2, constructing an objective function and a constraint function; and S3, solving the optimized parameter system constructed in the step S1 based on the objectiv