Casing pipe-cement sheath-stratum consolidated body integrity simulation experiment device

Abstract

The invention discloses a casing pipe-cement sheath-stratum consolidated body integrity simulation experiment device, and relates to the field of oil and gas drilling and extracting. The device comprises a supporting structure, a well body structure, a cement paste injecting system, a hydraulic system and a testing system; the well body structure is arranged on the supporting structure; the well body structure comprises stratum pipe columns and casing pipe columns which are vertically arranged on a supporting frame, wherein cement sheath cavities are formed among the stratum pipe columns and the casing pipe columns, and the cement sheath cavities communicate with the cement paste injecting system; the stratum pipe columns comprise upper stratum pipe columns and lower stratum pipe columns,wherein the upper stratum pipe columns and the lower stratum pipe columns are fixedly connected through oblique cut plates and oblique plate bolts, and the outer walls of the upper stratum pipe columns is connected with the hydraulic system; and the testing system involves DAS monitoring optical fiber, and the DAS monitoring optical fiber is spirally wound on the outer walls of the casing pipe columns. According to the device, the casing pipe-cement sheath-stratum integrity failure cause is explored from the perspective of experiments, the wellbore integrity failure mechanism is clarified, andthe theoretical support is provided for providing a corresponding prevention and control mechanism.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a casing-cement sheath-formation consolidation body integrity simulation experiment device. Background technique [0002] In the process of oil and gas drilling and production, the casing-cement sheath-formation is the most typical wellbore structure of oil and gas wells, and its integrity is the key to ensure the stability of the wellbore and the isolation of formation fluids. However, with the continuous development of my country's oil and gas resources and the continuous complexity of the geological environment, oil and gas leakage and wellbore integrity failure accidents related to wellbore quality are rapidly increasing. Therefore, the integrity analysis of the casing-cement sheath-formation system has always been a key research field to ensure the safe and efficient production of oil and gas resources. [0003] The failure of the casing-cement sheath-formation...

AI Technical Summary

Problems solved by technology

However, the results of numerical simulation often need to be verified by relevant tests, and most of the existing test devices are built solely considering the strength test of the casing, or the device considering the sealing of the cement sheath, lacking the casing-cement sheath-formation integral Integrity failure simulation test device under the combined effects of the above geological and engineering factors

Images