Fluid Control Valve Opening Adjustment for Balanced Layer Production
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Solution Overview
Problem
The uneven distribution of oil and natural gas resources and complex interlayer energy relations in oil and gas fields lead to mutual interference among flowing layers, affecting production and necessitating a method to automatically adjust fluid control valve opening degrees for balanced recovery.
Innovation Solution
A method involving simulation-based calculation of fluid control valve opening degrees using different step sizes, numerical simulation models, and dichotomy adjustments to achieve balanced production by evaluating production layers and adjusting orifice openings to match average production levels, incorporating pressure differences and valve spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If friction is used to impede and reduce liquid flow to control pressure drop, then pressure control is improved, but the casing is prone to wear and tear leading to failure
Solution Approach 1:
The patent replaces friction-based pressure control with pressure-based control using adjustable pressure control valves. Instead of relying on friction between moving parts to create pressure drop, the system directly controls pressure differential across each layer segment, eliminating the wear and durability issues associated with friction-based mechanisms.
2Ease of operation
If conventional completion techniques are used, then implementation is simple, but they cannot meet the requirements of production control in complex interlayer energy relations
Solution Approach 1:
The patent divides the completion system into multiple independently controllable layer segments, each with its own pressure control valve. This segmentation allows precise control of each layer's production while maintaining relative simplicity in implementation. Each segment can be independently adjusted to account for complex interlayer energy relations, overcoming the limitations of conventional completion techniques.
3Productivity
If flow control filters are used to distribute production volume, then production distribution is improved, but accurate control of exploitation rate is difficult
Solution Approach 1:
The patent transitions from flow rate control to pressure differential control. By precisely controlling the pressure difference across each layer segment, the system achieves accurate control of exploitation rates. The pressure control valves allow for fine-tuned adjustment of pressure differential, providing superior control accuracy compared to flow control filters.
Data Source
AI summary
A method, an apparatus and a system for automatically adjusting an opening degree of a fluid control valve, relating to the technical field of oil and gas exploration and development. The method includes: establishing a fluid control valve having an orifice structure in oil and gas production; using a numerical simulation method to obtain the influence law of minimum opening degree adjustment step on oil and gas production; obtaining relevant production test data of the oil and gas well, and calculating the total oil and gas production and the oil and gas production of each production layer based on the production test data of the oil and gas well; dividing the production layer segments into high, middle and low-production layers according to the production ratio of each production layer segment; respectively calculating the average productions of the high, middle and low-production layers.