CN-116733457-B - Fracture-cavity type oil reservoir residual oil detection device

CN116733457BCN 116733457 BCN116733457 BCN 116733457BCN-116733457-B

Abstract

The invention provides a fracture-cavity type oil reservoir residual oil detection device which comprises a shell, a well logging instrument, a fixing plate, a transmission mechanism and a fixing mechanism, wherein the well logging instrument is arranged in the shell, the fixing plate is used for fixing the well logging instrument in the vertical direction, the fixing plate is arranged in the shell and is located above the well logging instrument, the transmission mechanism is used for adjusting the vertical position of the fixing plate, the fixing mechanism is used for fixing the well logging instrument in the transverse direction, the fixing mechanism and the transmission mechanism form linkage, and the fixing plate and the fixing mechanism can be driven simultaneously through the transmission mechanism so as to fix the well logging instrument in the shell.

Inventors

CHEN YONG
TAN TAO
GUO CHEN
XIE HUI
ZHAO JIN
HUI JIAN
XIE SHUANG
YANG ZHANHONG

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司西北油田分公司

Dates

Publication Date: 20260505
Application Date: 20220304

Claims (9)

1. A fracture-cavity type reservoir residual oil detection device, comprising: a housing (1); A logging tool (3) arranged inside the housing; A fixing plate (4) for fixing the logging tool in the vertical direction, the fixing plate being arranged inside the housing and above the logging tool, and A transmission mechanism (50) for adjusting the vertical position of the fixed plate; A securing mechanism (60) for securing the tool in a lateral direction; wherein the fixing mechanism and the transmission mechanism form linkage, the fixing plate and the fixing mechanism can be driven simultaneously through the transmission mechanism so as to fix the logging instrument in the shell, The device also comprises a stabilizing mechanism (70) for fixing the fixing plate, wherein the stabilizing mechanism comprises two stabilizing units symmetrically distributed on two lateral sides of the logging instrument, the stabilizing units comprise fixing blocks (13) fixedly connected to the lower end face of the fixing plate, and clamping grooves are formed in two lateral sides of the fixing blocks; the device comprises a shell (7) with an open upper end, a box body (8) which is embedded on the transverse side wall of the shell and is fixed in an inner cavity of the shell through a connecting plate (9), a push block (10) which can move vertically along the box body is arranged in the box body, the upper end of the push block penetrates through the top surface of the box body, a clamping piece which comprises a rotating rod (11) symmetrically distributed on two transverse sides of the box body and a push rod (14) which is hinged between the corresponding rotating rod and the push block, one end of the rotating rod is hinged with the box body, the other end of the rotating rod is fixed with a clamping block (12) which is used for adapting to the clamping groove, a third transmission assembly which comprises a threaded rod (17) which penetrates through the bottom surface of the box body and is fixedly connected with the push block, a threaded rod (18) sleeved on the threaded rod, a third transmission sprocket (19) which is respectively fixedly arranged on a transmission shaft and the threaded rod, and a third transmission chain (20) which is adapted to the third transmission sprocket, wherein the transmission shaft and the corresponding third transmission sprocket are hinged with the corresponding third transmission sprocket are capable of forming a downward torque limiting assembly through the third transmission sprocket, the push block drives the push rod to rotate inwards and pulls the rotary rod to rotate inwards, so that each clamping block is clamped into the corresponding clamping groove, and the clamping piece clamps the fixed block.
2. The fracture-cavity oil reservoir residual oil detection device according to claim 1, wherein a first base plate (2) is fixed on a bottom plate of the housing, a second base plate (5) is fixed on a lower end surface of the fixed plate, and the logging instrument is located between the first base plate and the second base plate.
3. The fracture-cavity reservoir residual oil detection device of claim 1, wherein the transmission mechanism comprises: a drive shaft (6) oppositely disposed in lateral side walls of the housing, an upper end of one of the drive shafts passing through a top plate of the housing and protruding outward for connection to a drive motor; A first transmission assembly, through which the two transmission shafts form a transmission connection, through which the two transmission shafts can be driven to rotate simultaneously by the drive motor, and Two lifting screws (22) symmetrically distributed in the transverse direction, one end of each lifting screw is fixedly connected with the corresponding fixing plate, and the other end of each lifting screw is in transmission connection with the corresponding transmission shaft through a second transmission assembly; The transmission shafts can drive the corresponding lifting screws to move synchronously along the vertical direction through the first transmission assembly and the second transmission assembly, so that the fixing plate moves along the vertical direction.
4. A fracture-cavity reservoir residual oil detection device as claimed in claim 3, wherein the first transmission assembly comprises: First drive sprockets (28) fixedly mounted at respective lower ends of the drive shafts; A first drive chain (29) adapted to the first drive sprocket; the bottom plate of the shell is internally provided with a first cavity extending along the axial direction, and the first transmission assembly is arranged in the first cavity.
5. The fracture-cavity reservoir residual oil detection device of claim 4, wherein the second transmission assembly comprises: a transmission sleeve (23) sleeved on the lifting screw; A second drive sprocket (24) fixedly mounted to the drive shaft and the drive sleeve, respectively, and A second drive chain (25) adapted to the second drive sprocket; The transmission sleeve is in threaded connection with the lifting screw, and the transmission shaft can drive the transmission sleeve to rotate through the second transmission chain wheel and the second transmission chain, so that the lifting screw moves vertically.
6. The fracture-cavity reservoir residual oil detection device of claim 5, wherein the securing mechanism comprises securing units symmetrically disposed on lateral sides of the logging tool, the securing units comprising: The bevel gear transmission piece comprises a driving bevel gear (31) fixedly arranged on the transmission shaft, driven bevel gears (32) meshed with the driving bevel gear and distributed vertically to each other, and a central shaft (33) connected with the driven bevel gears, and the transmission shaft can drive the bevel gear transmission piece to drive a central connecting shaft to rotate; a connecting sleeve (34) which is connected with the central shaft in an adapting way, an extrusion block (36) is fixed at the tail end of the connecting sleeve, the central shaft is rotated to enable the connecting sleeve to drive the extrusion block sleeve to move along the transverse direction, and A connecting block (35) fixed on the bottom plate of the housing, the connecting sleeve passing through the connecting block and forming a sliding fit with the connecting block; The two fixing units can apply opposite acting forces to the logging instrument under the action of the corresponding transmission shafts at the same time so as to fix the logging instrument in the transverse direction, a second cavity is formed in the transverse side wall of the shell, the transmission shafts penetrate through the corresponding second cavity, and the bevel gear transmission piece is arranged in the second cavity.
7. The device for detecting residual oil in a fracture-cavity reservoir according to claim 6, wherein the transmission shaft is connected to the corresponding first transmission sprocket, second transmission sprocket, and drive bevel gear via torque limiters, respectively.
8. The fracture-cavity oil reservoir residual oil detection device according to any one of claims 1 to 5, wherein a plurality of pre-tightening springs (27) are arranged between a top plate of the shell and the fixed plate, two ends of each pre-tightening spring are fixedly connected with the top plate of the shell and the fixed plate respectively, symmetrically-distributed limiting blocks (26) are fixed on the transverse side end face of the fixed plate, symmetrically-distributed limiting grooves (261) are formed in the inner wall face of the transverse side wall of the shell, and the limiting blocks are adaptively installed in the corresponding limiting grooves and can vertically slide along the limiting grooves.
9. The device for detecting residual oil in a fracture-cavity reservoir according to claim 6, wherein, The stabilizing unit also comprises an auxiliary element arranged between the rotating rod and the shell, the auxiliary element comprises a plurality of uniformly distributed telescopic rods (16) and telescopic springs (15) sleeved on the telescopic rods, two ends of the telescopic rods are respectively hinged with the rotating rod and the inner wall surface of the shell, The telescopic spring can drive the telescopic rod to extend and can apply a force towards the fixed block to the rotating rod when the fixed unit clamps the fixed block, so that the clamping block is assisted to clamp the fixed block.

Description

Fracture-cavity type oil reservoir residual oil detection device Technical Field The invention belongs to the technical field of oil reservoir residual oil detection, and particularly relates to a fracture-cavity type oil reservoir residual oil detection device. Background Reservoir refers to the substantial accumulation of oil with the same pressure system in a single trap. If only oil is accumulated in one trap, known as a reservoir, only natural gas is accumulated, known as a reservoir. When a reservoir contains several oil-bearing sand layers, it is referred to as a multi-layer reservoir. The pulse neutron technology is mainly applied to the petroleum field and is a residual oil evaluation well logging technology. The pulse neutron logging instrument can accurately detect the condition of a reservoir (distribution conditions of oil, gas and water in the reservoir, and the like), determine the key reservoir parameters after the oil field is developed, namely the saturation of the residual oil, and further provide basis for research on the distribution rule of the residual oil, research on the flooding difference in the layer, identification of a gas-containing layer and an oil-water interface, determination of a water blocking layer, lithology judgment, and the like. The existing pulse neutron logging instrument does not have a protection function when in use, and most of the pulse neutron logging instrument is placed in a supporting plate to be used when in use and is exposed to the air, so that the pulse neutron logging instrument is easy to collide with the outside when in use and is inconvenient to carry, the pulse neutron logging instrument is easy to shake due to the fact that the pulse neutron logging instrument is not protected in the carrying and using processes, the pulse neutron logging instrument is easy to damage, stability of the pulse neutron logging instrument when in use cannot be guaranteed, and accuracy of measurement results of the pulse neutron logging instrument is reduced. Disclosure of Invention Aiming at the technical problems, the invention aims to provide a fracture-cavity type oil reservoir residual oil detection device which can effectively protect a logging instrument so as to prevent the logging instrument from being knocked by the outside, effectively fix the logging instrument and greatly improve the stability of the logging instrument. To this end, according to the present invention, there is provided a fracture-cavity type reservoir residual oil detection device comprising a housing; A logging tool disposed inside the housing; A fixing plate for fixing the logging instrument in the vertical direction, the fixing plate being arranged inside the housing and above the logging instrument, and The transmission mechanism is used for adjusting the vertical position of the fixed plate; a fixing mechanism for fixing the logging tool in a lateral direction; The fixing mechanism and the transmission mechanism form linkage, and the fixing plate and the fixing mechanism can be driven simultaneously through the transmission mechanism so as to fix the logging instrument in the shell. In one embodiment, a first backing plate is fixed on the bottom plate of the shell, a second backing plate is fixed on the lower end face of the fixed plate, and the logging instrument is positioned between the first backing plate and the second backing plate. In one embodiment, the transmission mechanism includes: A drive shaft oppositely disposed in lateral side walls of the housing, an upper end of one of the drive shafts penetrating a top plate of the housing and protruding outward for connection to a drive motor; A first transmission assembly, through which the two transmission shafts form a transmission connection, through which the two transmission shafts can be driven to rotate simultaneously by the drive motor, and Two lifting screws symmetrically distributed in the transverse direction, wherein one end of each lifting screw is fixedly connected with the fixed plate, and the other end of each lifting screw is in transmission connection with the corresponding transmission shaft through a second transmission assembly; The transmission shafts can drive the corresponding lifting screws to move synchronously along the vertical direction through the first transmission assembly and the second transmission assembly, so that the fixing plate moves along the vertical direction. In one embodiment, the first transmission assembly includes: The first driving chain wheels are respectively and fixedly arranged at the lower ends of the corresponding driving shafts; a first drive chain adapted to the first drive sprocket; the bottom plate of the shell is internally provided with a first cavity extending along the axial direction, and the first transmission assembly is arranged in the first cavity. In one embodiment, the second transmission assembly includes: A transmission sleeve sleeved on the lifting screw; A s