CN-116044504-B - Small-spacing well cavity-making test device for salt cavern gas storage

CN116044504BCN 116044504 BCN116044504 BCN 116044504BCN-116044504-B

Abstract

The invention provides a small-space pair well cavity-making test device for a salt cavern gas storage, which comprises a framework, a slidable test piece bearing platform, a main upright post, a pair of outer sleeves, a pair of inner sleeves, a salt rock test piece, a peristaltic pump and a double-cylinder water tank, wherein the slidable test piece bearing platform is arranged at the bottom of the framework, the salt rock test piece is arranged on the slidable test piece bearing platform, the main upright post and the peristaltic pump are arranged at the top of the framework, the pair of outer sleeves are sleeved on the outer sides of the pair of inner sleeves in a one-to-one correspondence manner, the pair of outer sleeves and the pair of inner sleeves are arranged in the main upright post, the bottom ends of the pair of outer sleeves and the bottom ends of the pair of inner sleeves penetrate through the framework and are inserted into the salt rock test piece, and the double-cylinder water tank is arranged in the framework and is connected with one inner sleeve of the pair of inner sleeves and the double-cylinder water tank respectively.

Inventors

LI LONG
LIU HAOSHENG
XIE NAN
LI JIANJUN
HOU LEI
CHEN JIASONG
FAN LILIN
GENG HUAN
WANG CHENGLIN
HE JUN
YU BO

Assignees

国家石油天然气管网集团有限公司

Dates

Publication Date: 20260505
Application Date: 20230129

Claims (1)

1. A small-space well cavity-making test device for a salt cavern gas storage is characterized by comprising a framework, a slidable test piece bearing platform, a main upright post, a pair of outer sleeves, a pair of inner sleeves, a salt rock test piece, a peristaltic pump and a double-cylinder water tank, wherein the slidable test piece bearing platform is arranged at the bottom of the framework, the salt rock test piece is arranged on the slidable test piece bearing platform, the main upright post and the peristaltic pump are arranged at the top of the framework, the pair of outer sleeves are sleeved on the outer sides of the pair of inner sleeves in a one-to-one correspondence manner, the pair of outer sleeves and the pair of inner sleeves are arranged in the main upright post in a one-to-one correspondence manner, the bottom ends of the pair of outer sleeves and the pair of inner sleeves penetrate through the framework and are inserted in the salt rock test piece, the double-cylinder water tank is arranged in the framework, the peristaltic pump is respectively connected with one inner sleeve and the double-cylinder water tank of the pair of inner sleeves, a top control box is arranged at the top end of the main upright post, a control panel and a digital display screen are arranged between the main upright post and the framework, the control panel is sleeved on the outer sleeve is connected with the top of the framework, the pair of outer sleeves is connected with the top of the stepping pump respectively, the LED is connected with the top of the inner sleeve is connected with the inner sleeve through the stepping pump respectively, the top end of the LED is connected with the top control box respectively, the top end of the inner sleeve is connected with the inner sleeve through the pair of the LED is connected with the inner sleeve through the top control box respectively, the laser imaging device is adjacent to the slidable test piece bearing platform, a plurality of pulleys are arranged at the bottom of the slidable test piece bearing platform, bearing platform pulley locking devices are arranged on the inner wall of the bottom end of the framework, a cabinet door is arranged on one side of the framework, a containing groove for containing the cabinet door is arranged at the bottom of the framework, a sliding groove is arranged on the side wall of the main upright post, a pair of outer sleeves are provided with lifting handles which are slidably arranged in the sliding groove, auxiliary support posts are sleeved outside the main upright post, the bottoms of the auxiliary support posts are connected with the top of the framework, gaps are reserved between the auxiliary support posts and the main upright post, protective liquid is arranged in the pair of outer sleeves, inner pipe adapters are respectively arranged on the pair of inner sleeves, and outer pipe adapters are respectively arranged on the pair of outer sleeves.

Description

Small-spacing well cavity-making test device for salt cavern gas storage Technical Field The invention relates to the technical field of cavity-making experimental equipment, in particular to a small-spacing well cavity-making experimental device for a salt cavern gas storage. Background The vertical well single-cavity-making method is a method mainly adopted in the current construction of salt cavern gas storage. But the layered rock salt is different from the salt dome geological conditions, and has the characteristics of thin salt layer thickness, multiple layers and the like. The single vertical well cavity-making method has the disadvantages of long cavity-dissolving time, low cavity-making efficiency, high cavity-making cost and low salt layer utilization rate in engineering application. The small-spacing cavity-making method for the well is a novel cavity-making method and has the advantages of shortening the cavity-making period, reducing the cost, improving the gas injection and production efficiency, increasing the cavity volume and the like. The main process is to hit two shafts close to the target salt layer, then connect the bottoms of the two shafts by adopting a horizontal drilling technology, and make a cavity by convection corrosion by utilizing the two shafts. As a new cavity creating method, the small-spacing well cavity creating technology has few engineering application cases and is still in a research stage. The cavitation rule and cavitation parameter setting of the technology are not fully researched, and a large number of experiments are needed to be researched. There is currently no set of well-to-well testing devices to complete similar model tests. Disclosure of Invention The invention aims to solve the technical problem of providing a small-space well cavity-making test device for a salt cavern gas storage aiming at the defects of the prior art. The technical scheme includes that the small-space double-well cavity-making test device for the salt cavern gas storage comprises a framework, a slidable test piece bearing platform, a main upright post, a pair of outer sleeves, a pair of inner sleeves, a salt rock test piece, a peristaltic pump and a double-cylinder water tank, wherein the slidable test piece bearing platform is arranged at the bottom of the framework, the salt rock test piece is arranged on the slidable test piece bearing platform, the main upright post and the peristaltic pump are arranged at the top of the framework, the pair of outer sleeves are sleeved on the outer sides of the pair of inner sleeves in a one-to-one correspondence manner, the pair of outer sleeves and the pair of inner sleeves are arranged in the main upright post, the bottom ends of the pair of outer sleeves and the bottom ends of the pair of inner sleeves penetrate through the framework and are inserted into the salt rock test piece, the double-cylinder water tank is arranged in the framework, and the peristaltic pump is respectively connected with one inner sleeve of the pair of inner sleeves and the double-cylinder water tank. The technical scheme has the advantages that the two casing strings can simulate two sets of brine injection and discharge pipe strings in the well cavity construction engineering, fresh water can be injected into the cavity model through the inner casing pipe by the peristaltic pump, brine pressure can be formed when the cavity is filled with brine, and brine can be discharged along the other casing string. And performing model test guidance engineering operation on the well cavity construction engineering according to the salt cavern gas storage, and developing an indoor similar model test to guide engineering parameter setting. And setting different cavity-making parameters to perform a similar model test, and inverting and correcting the cavity-making parameters according to test results. The setting of the cavity-making parameters of the well cavity-making engineering is directly guided, and the construction quality of the salt cavern gas storage engineering is improved. The method can be used for exploring the characteristics of cavity shape development rule, brine concentration distribution rule and the like in the cavity making process, and forms a method for controlling cavity shape expansion by different cavity making parameters. In addition, different similar models can be built according to engineering site conditions, and cavity-building parameters which are referenced to the site construction conditions are applied to predict cavity shape changes and guide the construction of the small-spacing cavity-building engineering of the salt cavern gas storage. Further, a top control box is arranged at the top end of the main upright post, a control panel and a digital display screen are arranged between the main upright post and the framework, and the control panel, the digital display screen and the peristaltic pump are all connected with the top control box. The t