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A method for evaluating the comprehensive performance of foam

A comprehensive performance evaluation, foam technology, applied in the direction of analyzing materials, instruments, etc., can solve the problem that the comprehensive foaming ability expression cannot meet the requirements and so on

Active Publication Date: 2020-04-17
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once the foam is injected into the reservoir, it is difficult to foam again. Therefore, in the process of foam flooding for fracture-cavity reservoirs, extremely high requirements are placed on foam stability, and the original expression of comprehensive foaming ability can no longer meet the requirements. Require

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  • A method for evaluating the comprehensive performance of foam
  • A method for evaluating the comprehensive performance of foam
  • A method for evaluating the comprehensive performance of foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] This embodiment provides a foam comprehensive performance evaluation method, which includes the following steps;

[0084] Step 1: At room temperature, use the Waring Blender method to measure the foam volume V of each foaming agent 0 and the solution half-life t 50 , the specific steps are: pour 200ml of the prepared foaming agent solution into the high-speed mixer container, set the rotation speed to 4000r / min, and stir for 2min, pour the generated foam into a 2000ml measuring cylinder, and quickly read the foam volume V 0 (ml), and pour 200ml 220,000 salinity salt water into the vector cylinder (the salt water contains Na 2 SO 4 139mg / L, NaHCO 3 192mg / L, NaCl 69253mg / L, CaCl 2 13702mg / L, MgCl 2 1183mg / L), and record the time taken by the liquid separated from the foam to the 300ml mark of the graduated cylinder, and use this time as the half-life t of the liquid separation of the foaming agent foam 50 . The Waring Blender test experiment of each foaming age...

Embodiment 2

[0094] This embodiment provides a foam comprehensive performance evaluation method, which includes the following steps;

[0095] Step 1: At room temperature, use the Waring Blender method to measure the foam volume V of the foaming agents AOS, SDS and SS-163 0 and the half-life t of solution in brine with different salinities 50 , the specific steps are: pour 200ml of the prepared foaming agent solution into the high-speed mixer container, set the rotation speed to 4000r / min, and stir for 2min, pour the generated foam into a 2000ml measuring cylinder, and quickly read the foam volume V 0 (ml), and pour 200ml of different salinity salt water into the vector cylinder (the salt water contains Na 2 SO 4 139mg / L, NaHCO 3 192mg / L, NaCl 69253mg / L, CaCl 2 13702mg / L, MgCl 2 1183mg / L), and record the time taken from the liquid separated out from each foaming agent solution foam to the 300ml mark of the graduated cylinder, and use this time as the half-life t of the correspondin...

Embodiment 3

[0117] This embodiment provides a foam comprehensive performance evaluation method for any two compound systems of AOS, SDS, and SS-163 three foaming agents, which includes the following steps:

[0118] Step 1: Mix any two foaming agents according to the mass ratio of 0:10, 1:9, 2:8, 3:7, 4:6, 5:5 to form a foaming agent compound system, Then at room temperature, utilize the Waring Blender method to measure the foam volume V of each foaming agent compound system 0 and the half-life t of solution in brine with different salinities 50 , the Waring Blender test experiment of each foaming agent compound system was repeated three times, and the final result was the average value of the three repeated experiments. 4 mg / L, 10×10 4 mg / L and 15×10 4 mg / L;

[0119] Step 2: Calculate the comprehensive foaming ability F of each foaming agent compound system under the condition of clear water and liquid according to the formula (6) for calculating the comprehensive foaming ability of f...

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Abstract

The invention provides a comprehensive performance evolution method for foams. The method comprises the following steps: preparing a foaming agent solution, and testing a foam volume V0 of the foamingagent solution and drainage half-life period t50 of the foaming agent solution under different mineralization degrees; respectively calculating a comprehensive foaming capacity Fi of a foaming agentunder conditions of fractured-vuggy reservoirs and sand-rock reservoirs, evaluating an applicable reservoir type of the foaming agent and an applicable mineralization degree range according to Fi, wherein Fi is calculated through a formula (as shown in the description), i*10000mg / L represents the mineralization degree, and f(t) represents a curvilinear equation of the foam volume changed along thetime.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to a foam comprehensive performance evaluation method. Background technique [0002] Foam volume and half-life (including liquid analysis half-life and defoaming half-life) are two basic parameters to describe foam performance. Foaming volume and half-life are two relatively independent parameters, one reflects the difficulty and quantity of foaming, and the other reflects the stability of the foam, but neither of these two parameters is sufficient to reflect the foaming agent in the foam. Foaming properties in porous media. Because the mobility adjustment ability of foam in the formation is affected by the combination of foam quantity (foaming volume) and stability (half-life). At present, the concept of comprehensive foaming ability is usually used to evaluate the static performance of foam in sandstone reservoir foam flooding technology. For fracture-vuggy reservo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/14
CPCG01N7/14
Inventor 侯吉瑞屈鸣宋兆杰马仕希王倩
Owner CHINA UNIV OF PETROLEUM (BEIJING)