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A device for testing the waterproof channeling performance of cement slurry

A cement slurry and performance technology, which is applied in the direction of measuring devices, flow characteristics, instruments, etc., can solve the problems of inability to effectively and accurately reflect the waterproof performance, poor repeatability, large errors, etc., and achieve accurate measurement of waterproof performance and external factors The effect of less and simple operation

Active Publication Date: 2022-07-19
CNPC BOHAI DRILLING ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing technology lacks the targeted technical means of water channeling performance before the cement slurry is solidified. Some scholars (Lu Haichuan, Zhao Yue, Song Weibin, etc.. Research and performance evaluation of new water channeling materials for cementing[J]. Drilling fluid and Completion Fluid, 2017,34(4):75-79) provides a simple evaluation device composed of U-shaped tube and rubber tube, which has poor repeatability, and the gel strength measurement process is affected by temperature, operators, water flow There are many influencing factors such as speed, and the error is large, which cannot effectively and accurately reflect the anti-channeling performance of the cement slurry before it solidifies

Method used

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  • A device for testing the waterproof channeling performance of cement slurry
  • A device for testing the waterproof channeling performance of cement slurry

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Experimental program
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Effect test

Embodiment 1

[0037] According to the cement slurry formula: Shengwei G-grade cement slurry + 3% BH-D301L + 7% BH-G502S + 3% BH-F201L + 0.1% BZXP-1 + 40% water (BH-D301L is oil well cement drag reducing agent, Produced by PetroChina Bohai Drilling Engineering Company; BH-G502S is oil well cement anti-channeling agent, produced by PetroChina Bohai Drilling Engineering Company; BH-F201L is oil well cement water loss reducer, produced by PetroChina Bohai Drilling Engineering Company; BZXP-1 is oil well cement defoamer The cement slurry prepared according to GB / T19139-2012 was poured into the cement slurry cylinder of the water channeling simulation device, and the constant temperature heater was turned on in advance to heat the water temperature to the required temperature of 75 °C, and the low-speed circulating pump was turned on. The cycle time For 15min, observe the experimental phenomenon: a small amount of cement slurry around the simulated hole and crack dissolves, and a small amount of c...

Embodiment 2

[0039] According to the cement slurry formula: Shengwei Grade G cement slurry + 3% BH-D301L + 3% BH-F201L + 0.1% BZXP-1 + 40% water (BH-D301L is a drag reducer for oil well cement, produced by PetroChina Bohai Drilling Engineering Company ; BH-F201L is oil well cement water loss reducing agent, produced by PetroChina Bohai Drilling Engineering Company; BZXP-1 is oil well cement defoamer, produced by PetroChina Bohai Drilling Engineering Company), prepared cement slurry according to GB / T19139-2012 and poured into water channeling In the cement slurry cylinder of the simulated device, turn on the constant temperature heater in advance to heat the water temperature to the required temperature of 75 °C, turn on the low-speed circulating pump, and the circulation time is 15 minutes. Simulate the flow of formation water to dissolve and migrate a large amount of cement slurry. After the 15min experiment, turn off the low-speed circulating pump, and set the six-speed rotational viscom...

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Abstract

The invention discloses a device for testing the waterproof channeling performance of cement slurry, comprising a constant temperature heating water tank, a low-speed circulating pump, a rotational viscometer, a water channeling simulation device and a sewage tank. The slurry cylinder is a bottomed cylinder with a sandwich structure. A water inlet is provided at the lower part of the outer cylinder wall of the cylinder body, and a drainage outlet is provided at the upper part of the outer cylinder wall on the opposite side. The inner side wall of the cylinder body There are several simulated holes and slits to simulate the formation pores. The water inlet is connected to the constant temperature heating water tank through a low-speed circulating pump. The drainage port is connected to the sewage tank. The drainage outlet is discharged into the sewage tank to simulate the flow of formation water, and the rotational viscometer is used to measure the viscosity of the cement slurry loaded in the cement slurry cylinder. It can accurately measure the waterproof channeling performance of cement slurry and provide experimental basis for the adjustment of cement slurry formula.

Description

technical field [0001] The invention relates to the technical field of cementing, in particular to a device for testing the waterproof channeling performance of cement slurry. Background technique [0002] At present, most onshore oilfields in China have entered the stage of high water-cut development. Although water injection development can maintain formation productivity, it also brings water channeling problems to cementing construction, which seriously restricts the implementation of oilfield development strategies and the improvement of oil and gas recovery. Therefore, annular water channeling has become one of the main concerns in the field of oil and gas well cementing. Cementing cement slurry begins to wait for setting after the replacement is in place. During the waiting-setting process, the cement slurry develops into a solid state. During the process, the structure of the slurry is neither solid nor liquid. This cementing characteristic (cementing strength) deter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38G01N11/14
CPCG01N33/383G01N11/14
Inventor 李小林刘文明闫振峰凌勇齐奔付家文宗勇于倩倩郑其林黄伟佳
Owner CNPC BOHAI DRILLING ENG