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Method and device for testing expansion and shrinkage of cement paste

A technology of expansion and contraction and cement slurry, which is applied in the field of oil and gas well cementing, and can solve the problems that the volume change of cement slurry cannot be truly reflected, and the expansion and contraction of cement slurry cannot be tested at the same time.

Active Publication Date: 2021-09-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the related art, the expansion and contraction of the cement slurry in the axial direction can only be tested by the axial testing device, but the expansion and contraction of the cement slurry in the axial and radial directions cannot be tested at the same time. volume change

Method used

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  • Method and device for testing expansion and shrinkage of cement paste
  • Method and device for testing expansion and shrinkage of cement paste
  • Method and device for testing expansion and shrinkage of cement paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] In this embodiment, the expansion and contraction of the transmission medium in the axial and radial directions are not considered as an example for illustration.

[0140] Step 1: inject cement slurry and transmission medium into the first kettle body, and inject cement slurry and transmission medium into the second kettle body.

[0141] The cement slurry is the 7-inch liner cementing cement slurry of X1 Well X1 in the Sichuan-Chongqing Gas Field, which is a flexible cement slurry with a large temperature difference and a density of 1.90g / cm 3 . The transmission medium is water.

[0142] Step 2: Control both the first kettle body and the second kettle body at 21MPa and 120°C.

[0143]Step 3: Test the expansion and contraction of the cement slurry and the transmission medium in the axial direction through the first kettle body, test the expansion and contraction of the cement slurry and the transmission medium in the radial direction through the second kettle body, and...

Embodiment 2

[0150] This embodiment is described by taking the expansion and contraction of the transmission medium in the axial and radial directions as an example.

[0151] Step 1: inject cement slurry and transmission medium into the first kettle body, and inject cement slurry and transmission medium into the second kettle body.

[0152] The cement slurry is the same as that in Example 1, and the transmission medium is also the same.

[0153] Step 2: Control both the first kettle body and the second kettle body at 21MPa and 120°C.

[0154] Step 3: According to the expansion and contraction of the transmission medium in the axial direction, test the expansion and contraction of the cement slurry in the axial direction through the first kettle body; test the cement through the second kettle body according to the expansion and contraction of the transmission medium in the radial direction The amount of expansion and contraction of the slurry in the radial direction; the thickening time re...

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Abstract

The invention discloses a method and device for testing expansion and shrinkage of cement paste, and belongs to the technical field of oil and gas well cementation. According to the device for testing the expansion and shrinkage of cement paste provided by the embodiment of the invention, the expansion and shrinkage amounts of the cement paste and a transmission medium in the axial direction are tested through a first kettle body; the expansion and shrinkage amounts of the cement paste and the transmission medium in the radial direction are tested through a second kettle body; the expansion and shrinkage amount of the transmission medium in the radial direction and the expansion and shrinkage amount of the transmission medium in the axial direction are determined under preset temperature and preset pressure obtained through a data storage system; the thickening time of the cement paste is tested through a thickening instrument; the static gelling time of the cement paste is tested through a static gelling strength analyzer; the volume change amount of the cement paste is determined through a data acquisition system; and therefore, continuous measurement of the volume change of the cement paste at high temperature and high pressure is realized, the volume change of the cement paste in a well is truly reflected, and a support is provided for guaranteeing and evaluating the integrity of an oil-gas well shaft.

Description

technical field [0001] This application relates to the technical field of oil and gas well cementing. In particular, it relates to a test method and device for expansion and contraction of cement slurry. Background technique [0002] In the field of oil and gas well cementing technology, if the cementing quality is poor, gas channeling will occur, and the fluid in the high-pressure layer will channel into the low-pressure layer, resulting in the loss of oil and gas resources or damage to the reservoir. However, the volume change of the cement slurry used in well cementing under high temperature and high pressure downhole will affect the cementing quality. Therefore, it is necessary to test the comprehensive expansion and contraction of the cement slurry in the radial and axial directions, that is, the volume change of the cement slurry , so as to ensure the quality of cementing and prevent gas channeling in oil and gas wells. [0003] In the related art, the expansion and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38G01N25/16G01N19/00
CPCG01N33/383G01N25/16G01N19/00Y02W30/91
Inventor 王福云马辉运唐诗国郑友志李杰夏宏伟李维焦利宾辜涛谢明华杨涛余江青胜兰郭枫林付嫱赵晓丽卿阳宋文豪马云龙
Owner PETROCHINA CO LTD