Mud cake solidification intensity evaluating method and mud cake solidification intensity detecting device

Abstract

The invention discloses a mud cake solidification intensity evaluating method and a mud cake solidification intensity detecting device. The mud cake solidification intensity evaluating method includes the steps that a drilling fluid mud cake is made through a dehydration cylinder, and the mud cake has certain intensity through the activation function; the prepared and activated mud cake is placed on a pressure sensor of the mud cake solidification intensity detecting device, a metal rod is manually operated to act on the mud cake downwards, and force when a steel needle punctures the mud cake is tested; ABAQUS software is used for setting up a model of the mud cake, and the elasticity modulus and Poisson ratio of the mud cake are obtained through an ultrasonic measurement device, and stress analysis is carried out on the mud cake to obtain the intensity of the mud cake. The solidification degree of the mud cake can be presented in a quantified mode through the mud cake solidification intensity detecting method, and a foundation is laid for research of the mud cake solidification technology.

Description

technical field [0001] The invention relates to the field of cementing quality research, in particular to a mud cake solidification strength evaluation method and a mud cake solidification strength detection device. Background technique [0002] Well cementing is one of the important links in the process of oil and gas well construction. It is a downhole operation project involving a wide range of areas, high risk, high operation requirements and strong technicality. The quality of cementing directly affects whether the well can continue to drill, whether it can be produced smoothly, the life of oil and gas wells, and the recovery rate of oil and gas reservoirs. In cementing engineering, the interface between the casing and the cement is called the first cementing interface, and the interface between the cement and the formation is called the second cementing interface. Interface cementation has always been considered as the weak link of the overall structure, and it is als...

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Problems solved by technology

However, in the research of mud cake solidification technology, the strength evaluation of solidified mud cake is a problem that many researchers have not solved at present, mainly because the physical parameters and morphology characteristics of mud cake are very different from those of ordinary metals and cement-based materials. Large, conventional material strength testing is difficult to meet technical research requirements

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