CN201924919U

CN201924919U - Supercritical fluid drilling and completion simulation test device

Info

Publication number: CN201924919U
Application number: CN201120017722XU
Authority: CN
Inventors: 王瑞和; 倪红坚; 杜玉昆; 岳伟民; 霍洪俊; 雷鹏
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2011-01-15
Filing date: 2011-01-15
Publication date: 2011-08-10
Anticipated expiration: 2021-01-15

Abstract

The utility model discloses a supercritical fluid drilling and completion simulation test device which comprises a main circulating loop composed of a storage tank, a booster pump, a heater, a drilling and completion simulation test board, a separator and a cooler which are connected sequentially by a pipeline, wherein the drilling and completion simulation test board comprises a well shaft, a simulated core is arranged at the bottom of the well shaft, a drill rig is arranged above the simulated core, the drill rig is provided with a hollow drill rig channel for supercritical fluid to pass through, an annular cavity is formed between the drill rig and the inner wall of the well shaft, and a well shaft outlet communicated with a well shaft cavity is arranged on the side wall at the upper part of the well shaft. The supercritical fluid drilling and completion simulation test device can more objectively and veritably simulate the supercritical fluid drilling and completion test process and intuitively reflects the parameter distribution on the well shaft and the effect on the stratum in the supercritical fluid drilling and completion simulation process. The supercritical fluid drilling and completion simulation test device has wide application range and can be used for various function expansion tests besides the supercritical fluid drilling and completion simulation test.

Description

Supercritical fluid bores the completion simulation test device

Technical field

The utility model relates to oil, natural pneumatic drill completion technique field, specifically, relates to a kind of supercritical fluid and bores the completion simulation test device.

Background technology

Under current energy-intensive situation, for guaranteeing the energy security of China, must form new method, the new technology of development, effectively improve the exploration and development efficient of petroleum resources.Being that the supercritical fluid of representative had both had gas like lower viscosity and easy diffusivity with the supercritical carbon dioxide, also having the high density and the good characteristics of dissolubility of liquid, is the brill well completion fluid medium that has petroleum resources exploration and development application potential.Supercritical fluid bores the development of completion technique, at first need to research and develop indispensable experimental rig, carry out fundamental research, yet the existing conventional fluid bores the completion experimental rig exists following deficiency: operating pressure or operating temperature are too low, required primary condition in the time of can't satisfying supercritical fluid modulation and work; Parameters such as pit shaft internal pressure, temperature can not accurately be controlled, and can't simulate the accurate transformation of actual brill completion process medium fluid state; The measureing equipment specific aim is poor, can't reflect real-time and accurately that the parameter that supercritical fluid bores in the completion process changes.Therefore setting up a cover supercritical fluid and bore the simulation test device of completion, is the necessary ways that present supercritical fluid bores completion technique research.

The utility model content

Technical problem to be solved in the utility model is: provide a cover supercritical fluid to bore the completion simulation test device for carrying out basic theory, make its more objective reality simulation supercritical fluid bore the completion process of the test, the supercritical fluid of reflection simulation intuitively bores completion process pit shaft parameter distribution and to the effect situation on stratum.

For solving the problems of the technologies described above, the technical solution of the utility model is: supercritical fluid bores the completion simulation test device, comprise main circulation loop, described main circulation loop is connected successively by pipeline by storage tank, booster pump, heater, brill completion simulation test bench, eliminator and cooler and forms; Described brill completion simulation test bench comprises pit shaft, the bottom of described pit shaft is provided with the simulation core, the top of described simulation core is provided with drilling tool, described drilling tool has the drilling tool passage that supplies supercritical fluid to flow through of hollow, be provided with movably baffle plate between described simulation core and the described drilling tool, form toroidal cavity between the inwall of described drilling tool and described folding, the sidewall of described upper wellbore is provided with the pit shaft outlet that is communicated with the inner chamber of described pit shaft.

As optimized technical scheme, described drilling tool comprises the drill string that stretches into from the top of described pit shaft in the pit shaft, described drill string has the drill string passage that supplies supercritical fluid to flow through of hollow, and the bottom of described drill string is equipped with drill bit, and described drill bit is provided with the bit nozzle that flows out for supercritical fluid.

As optimized technical scheme, on described main circulation loop, in the pit shaft of described brill completion simulation test bench and be respectively equipped with some pressure sensor interfaces, temperature sensor interface and flow meter interface around the described simulation core.

As optimized technical scheme, be provided with pressure controller and the temperature controller that is used to control pit shaft internal pressure and temperature in the outside of described pit shaft.

As optimized technical scheme, described supercritical fluid bores the completion simulation test device and also comprises the pressure regulation branch road, and described pressure regulation branch road is communicated with described main circulation loop, and described pressure regulation branch road is provided with overflow valve.

Owing to adopted technique scheme, the beneficial effects of the utility model are: the utility model in use, at first sealing simulation core makes it keep certain confined pressure and pore pressure, next opens the temperature adjusting element, it is heater, the temperature controller of cooler and pit shaft outside, valve on the main circulation loop is opened successively, the fluid of emitting in the storage tank makes it be full of main circulation loop, start and the adjusting booster pump, heater, the flow of modulation fluid, pressure and temperature, make it reach supercriticality, pressure by the control of the overflow valve on pressure regulation branch road main circulation loop, make the fluid in the main circulation loop form stable circulation, when fluid reaches the test requirements document condition, baffle plate in the pit shaft is shifted, the beginning experimental test, supercritical fluid enters drill bit from the pit shaft inlet by drill string, after the bit nozzle ejection, act on the simulation core, afterwards, the fluid that carries simulation core impurity flows out to eliminator along returning on the toroidal cavity through the pit shaft outlet, carries out solid phase and liquid phase separation, fluid after the separation is got back to storage tank after the cooler refrigeration, can analyze solid phase impurity after separating and simulation core afterwards.

The utility model can record in the pit shaft and the pressure field and the thermal field of simulating the core sidewall with pressure sensor of simulating the core arranged around and temperature pick up in pit shaft, cooperate the monitoring instrument of peripheral hardware can carry out along stroke pressure, the real-time collection and the analysis of temperature and flow, by the timely and effective evaluation test effect of data acquisition and analysis system, boring completion simulation core specification can be according to the follow-up test adjustment, the distortion factor is little, evaluation of test result degree of accuracy height, bore the completion simulation test bench and can control pit shaft temperature inside and pressure, the actual completion operating mode of boring of simulation by the pressure controller and the temperature controller that are located at the pit shaft outside.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the experiment process figure of the utility model embodiment;

Fig. 2 is the structure cross-sectional schematic of boring the completion simulation test bench among the utility model embodiment;

Among the figure: the 1-storage tank; The 2-booster pump; The 3-heater; 4-bores the completion simulation test bench; The 5-eliminator; The 6-cooler; 7-drill string passage; The 8-drill string; The 9-drill bit; The 10-bit nozzle; The 11-baffle plate; The 12-damper actuator; The outlet of 13-pit shaft; The 14-toroidal cavity; The 15-pit shaft; 16-simulates core; 17-pit shaft bottom outlet; The 18-overflow valve.

The specific embodiment

As shown in Figure 1, supercritical fluid bores the completion simulation test device, comprises main circulation loop, described main circulation loop by storage tank 1, booster pump 2, heater 3, bore completion simulation test bench 4, eliminator 5 and cooler 6 and connect successively by high pressure line and form.Wherein, described storage tank 1 is provided with explosion-proof control valve, and described booster pump 2 is provided with temperature controller.

As shown in Figure 2, described brill completion simulation test bench 4 comprises pit shaft 15, the bottom of described pit shaft 15 is provided with simulation core 16, the top of described simulation core 16 is provided with drilling tool, described drilling tool has the drilling tool passage that supplies supercritical fluid to flow through of hollow, be provided with movably baffle plate 11 between described simulation core 16 and the described drilling tool, the outside of described pit shaft 15 is provided with damper actuator 12 corresponding to the position of described baffle plate 11, form toroidal cavity 14 between the inwall of described drilling tool and described pit shaft, the sidewall on described pit shaft 15 tops is provided with the pit shaft outlet 13 that is communicated with the inner chamber of described pit shaft, the bottom of described pit shaft 15 is provided with the pit shaft bottom outlet 17 of can shutoff or connecting with atmosphere, described pit shaft bottom outlet 17 also can connect high-pressure bottle, is used for the simulated formation pore pressure.In the present embodiment, described drilling tool comprises the drill string 8 that stretches into from the top of described pit shaft 15 in the pit shaft, described drill string 8 has the drill string passage 7 that supplies supercritical fluid to flow through of hollow, and the bottom of described drill string 8 is equipped with drill bit 9, and described drill bit 9 is provided with the bit nozzle 10 that flows out for supercritical fluid.

Wherein, on described main circulation loop, in the pit shaft 15 of described brill completion simulation test bench 4 and be respectively equipped with if in pressure sensor interface, temperature sensor interface and flow meter interface (not shown) around the described simulation core 16.

Wherein, be provided with pressure controller and the temperature controller (not shown) that is used to control pit shaft 15 internal pressures and temperature in the outside of described pit shaft 15.

Wherein, described supercritical fluid bores the completion simulation test device and also comprises the pressure regulation branch road, and described pressure regulation branch road is communicated with described main circulation loop, and described pressure regulation branch road is provided with overflow valve 18.

Operating principle: when adopting the utility model to carry out supercritical fluid brill completion simulated test, at first shutoff pit shaft bottom outlet 17 seals simulation core 16, makes it keep certain confined pressure and pore pressure; Next opens the temperature adjusting element, it is heater 3, the temperature controller of cooler 6 and pit shaft 15 outsides and the temperature controller on the booster pump 2, valve on the main circulation loop is opened successively, the fluid of emitting in the storage tank 1 makes it be full of main circulation loop, start and adjusting booster pump 2, heater 3, the flow of modulation fluid, pressure and temperature, make it reach supercriticality, pressure by the 18 control main circulation loops of the overflow valve on the pressure regulation branch road, make the fluid of main circulation loop form stable circulation, when fluid reaches the test requirements document condition, baffle plate in the pit shaft 15 11 is shifted by damper actuator 12, the beginning experimental test, supercritical fluid enters drill bit 9 from the drill string passage 7 of drill string 8, after bit nozzle 10 ejections, act on the simulation core 16 of bottom, afterwards, the fluid that carries simulation core impurity is along returning on the toroidal cavity 14, flow out to eliminator 5 through pit shaft outlet 13, carry out solid phase and liquid phase separation, fluid after the separation is got back to storage tank 1 after cooler 6 refrigeration, can analyze solid phase impurity after separating and simulation core afterwards.

The above only is giving an example of the utility model preferred forms, and the part of wherein not addressing in detail is those of ordinary skills' common practise.Protection domain of the present utility model is as the criterion with the content of claim, and any equivalent transformation that carries out based on technology enlightenment of the present utility model is also within protection domain of the present utility model.

Claims

1. supercritical fluid bores the completion simulation test device, it is characterized in that: comprise

Main circulation loop, described main circulation loop are connected successively by pipeline by storage tank, booster pump, heater, brill completion simulation test bench, eliminator and cooler and form;

Described brill completion simulation test bench comprises pit shaft, the bottom of described pit shaft is provided with the simulation core, the top of described simulation core is provided with drilling tool, described drilling tool has the drilling tool passage that supplies supercritical fluid to flow through of hollow, be provided with movably baffle plate between described simulation core and the described drilling tool, form toroidal cavity between the inwall of described drilling tool and described pit shaft, the sidewall of described upper wellbore is provided with the pit shaft outlet that is communicated with the inner chamber of described pit shaft.

2. supercritical fluid as claimed in claim 1 bores the completion simulation test device, it is characterized in that: described drilling tool comprises the drill string that stretches into from the top of described pit shaft in the pit shaft, described drill string has the drill string passage that supplies supercritical fluid to flow through of hollow, the bottom of described drill string is equipped with drill bit, and described drill bit is provided with the bit nozzle that flows out for supercritical fluid.

3. supercritical fluid as claimed in claim 1 bores the completion simulation test device, it is characterized in that: on described main circulation loop, in the pit shaft of described brill completion simulation test bench and be respectively equipped with some pressure sensor interfaces, temperature sensor interface and flow meter interface around the described simulation core.

4. supercritical fluid as claimed in claim 1 bores the completion simulation test device, it is characterized in that: be provided with pressure controller and the temperature controller that is used to control pit shaft internal pressure and temperature in the outside of described pit shaft.

5. bore the completion simulation test device as each described supercritical fluid of claim 1 to 4, it is characterized in that: described supercritical fluid bores the completion simulation test device and also comprises the pressure regulation branch road, described pressure regulation branch road is communicated with described main circulation loop, and described pressure regulation branch road is provided with overflow valve.