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Mudstone sample, device and method for reshaping mudstone sample using cuttings

A mudstone and sample technology, which is applied in the field of mudstone samples and the device field of using cuttings to reshape mudstone samples, can solve problems such as the performance evaluation of mudstone layers in disaster-stricken sections and the difficulty in determining the location of abandoned wells

Active Publication Date: 2019-10-25
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the abandoned wells have been abandoned for 30 years, and it is particularly difficult to determine the location of the abandoned well, and it is even more difficult to obtain the mudstone layer in the accident section for its performance evaluation

Method used

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  • Mudstone sample, device and method for reshaping mudstone sample using cuttings
  • Mudstone sample, device and method for reshaping mudstone sample using cuttings
  • Mudstone sample, device and method for reshaping mudstone sample using cuttings

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Experimental program
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Effect test

Embodiment 1

[0073] The mudstone samples provided by the present invention are prepared from mudstone drilling debris. Through the mechanical evaluation of the remolded mudstone samples, the sealing performance of abandoned wells can be evaluated, and further reference can be made for whether to carry out workover operations.

Embodiment 2

[0075] See attached Figure 1~3 The device for reshaping a mudstone sample using cuttings provided in Embodiment 1 of the present invention includes a sleeve 23, a bottom plate 35, a pressing plate 32 and a force applying mechanism. The shape of the bottom plate 35 is the same as the inner cross-sectional shape of the sleeve 23, so that the bottom plate 35 can be embedded in the sleeve 23; A sliding pair is formed between the bottom plate 35, the inner wall of the sleeve 23, and the pressure plate 32 to form a first accommodation space for the mudstone drilling debris 38 to be pressed; the bottom plate 35, the sleeve 23, and the pressure plate 32 are at least provided with A permeable hole is used to drain the water overflowing from the mudstone formation drilling debris 38 to be pressed during the pressing process; the force applying mechanism is used to provide a pressing force from the upper part of the pressing plate 32 to the mudstone formation drilling debris 38 to be pr...

Embodiment 3

[0084] See attached Figure 4 Unlike the device for reshaping mudstone samples using cuttings provided in Embodiment 1 of the present invention, the device for reshaping mudstone samples using cuttings provided in Embodiment 2 of the present invention further includes a support and a hydraulic mechanism 16 . The assembled sleeve 23 , bottom plate 35 , pressing plate 32 and force application mechanism are carried on the bracket, and the hydraulic mechanism 16 is used to control the force applied by the force application mechanism to the pressure plate. In this case, the pressing operation is more robust.

[0085] Wherein, the bracket includes an upper loading plate 1 , a lower loading plate 2 , and at least two uprights, and the two uprights include a first upright 3 and a second upright 4 . One end 5 of the first column 3 is rigidly connected to the upper loading plate 1, and the other end 8 of the first column 3 is rigidly connected to the lower loading plate 2; one end of t...

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Abstract

The invention discloses a mud rock sample and a device and a method for remodeling the mud rock sample by rock fragments, and belongs to the technical field of deep oil and gas reservoir drilling and depleted gas reservoir utilization. The mud rock sample is prepared from mud rock drilling fragments. The device comprises a sleeve, a bottom plate, a pressing plate and a force application mechanism. The method includes the steps: acquiring the mud rock seam drilling fragments; grinding the mud rock seam drilling fragments to obtain grinded mud rock seam drilling fragments; adding water into the grinded mud rock seam drilling fragments and stirring the fragments to obtain mud rock seam drilling fragments capable of being pinched and lumped; placing the mud rock seam drilling fragments capable of being pinched and lumped in the device, pressing the fragments and taking out pressed fragments to obtain the mud rock sample. By performing mechanics evaluation of the remodeled mud rock sample, the sealing performance of an abandoned well can be evaluated, and a reference is further provided for whether to perform workover treatment or not.

Description

technical field [0001] The invention relates to the technical field of deep oil and gas reservoir drilling and utilization of depleted gas reservoirs, in particular to a mudstone sample, a device and a method for reshaping the mudstone sample by cuttings. Background technique [0002] Wellbore stability in shale has always been a major difficulty in oil exploration and development, especially in the oil and gas drilling in the 1970s and 1980s, due to insufficient understanding of the characteristics of shale caprock, the occurrence of For complex accidents such as well collapse, lost circulation, and stuck pipe, the drilling was completed after various treatment methods failed. However, with the increase in demand for energy in recent years, the construction of underground natural gas storage has entered a period of rapid development. Since underground gas storage plays an irreplaceable role in peak regulation and ensuring gas supply security, the construction of undergroun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 郭印同杨春和王磊徐峰侯振坤魏元龙汪虎
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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