1. Overview
Reservoir damage refers to the process that when the reservoir is opened, the physical and chemical changes occur due to the interaction between the internal or external components of the reservoir and the reservoir components, resulting in the adjustment of the structure of the rock and the internal liquid and the decrease of the absolute permeability of the reservoir. Protection techniques are the measures used to protect the reservoir from damage.
This device is mainly used to study the degree of reservoir damage caused by the means of improving the recovery rate in the process of oil and gas exploitation, and to find a reasonable way to reduce the reservoir damage.
The high temperature and high pressure core dynamic damage evaluation tester belongs to the field of oil and gas layer protection experimental equipment in oil exploration and development. It consists of constant speed and constant pressure pump, mud pump, high pressure liquid tank, multi-point core holder for end surface circulation, flowmeter, gas source, pressure sensor, ring pressure pump, back pressure controller, data collector and computer. Under the conditions of simulating formation temperature, pressure and flow rate, the original permeability value of each section of the core is measured first, without taking out the core, the fluid entering the well in the high-pressure liquid tank is driven by the mud pump, the permeability value of each section of the core is measured, and the depth and degree of damage of each section of the core by the fluid entering the well are evaluated, so as to optimize the drilling fluid and completion fluid system to meet the protection of the oil and gas layer.
Main technical parameters of 2.
1. System pressure: 10000psi
2. System temperature: RT ~ 180 ℃
3. Maximum displacement: 30 ml/min
4. Rock sample specification: Φ25 × 25~80mm; Φ38 × 38~100mm