# Indoor Evaluation of a Temperature-Controlled Gel Intelligent Diversion System

## TL;DR

This paper presents a new temperature-controlled gel system to improve oilfield production by blocking dominant flow paths and evenly distributing treatment fluids.

## Contribution

A novel intelligent diversion system using temperature-controlled gel for enhanced reservoir management in heterogeneous oilfields.

## Key findings

- The system shows excellent injectability and controllable solidification time and phase change temperature.
- It achieves high plugging strength and rapid plugging rate, meeting construction requirements effectively.
- The technology enables a 'liquid–solid–liquid' phase transition, ensuring even fluid distribution in the reservoir.

## Abstract

The Bohai SZ36-1 oilfield, the largest offshore oilfield in China, features a high-porosity, high-permeability reservoir with significant heterogeneity and permeability variations. After extended water injection, the reservoir’s pore structure evolved, increasing heterogeneity and reducing the effectiveness of traditional production methods. To address these issues, this study introduces an intelligent diversion and balanced unblocking technology, using a temperature-controlled diversion system to block dominant flow channels and ensure even distribution of treatment fluids while maintaining reservoir integrity. The technology’s scientific validity and feasibility were confirmed through extensive testing. Results show that the diversion system offers excellent injectability, with controllable solidification time, phase change temperature, and strong compatibility, allowing for a “liquid–solid–liquid” phase transition in the reservoir. The technology also demonstrates high plugging strength, rapid plugging rate, significant diversion effects, and moderate injection intensity, all meeting construction requirements.