CN-116950599-B - Equipment and method for simulating temporary blocking of heterogeneous reservoir blasthole

CN116950599BCN 116950599 BCN116950599 BCN 116950599BCN-116950599-B

Abstract

The invention provides equipment for simulating temporary plugging of a blasthole of a heterogeneous reservoir, which comprises a blasthole temporary plugging model, a perforation model, a release device and a pressure and flow detection device, wherein the blasthole temporary plugging model is used for simulating heterogeneous reservoirs with different permeabilities, the perforation model is arranged in the blasthole temporary plugging model and is used for simulating perforation blastholes in the heterogeneous reservoirs, the release device is used for releasing carrying liquid containing temporary plugging agents to the blasthole temporary plugging model, and the pressure and flow detection device is used for detecting and obtaining inlet end pressure data and outlet end flow data of the blasthole temporary plugging model in the process of temporary plugging of the blasthole. The invention solves the problem that the prior art can not simulate the influence of reservoir heterogeneity on the injection Kong Baoyan temporary plugging, and provides theoretical support for the on-site borehole temporary plugging design.

Inventors

ZHANG LUFENG
LI FENGXIA
WANG HAIBO
HE JIAYUAN

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石油勘探开发研究院

Dates

Publication Date: 20260508
Application Date: 20220418

Claims (7)

1. An apparatus for simulating a temporary plugging of a borehole in a heterogeneous reservoir, the apparatus comprising: a blasthole temporary plugging model for simulating heterogeneous reservoirs having different permeabilities; the perforation model is arranged in the porthole temporary plugging model and is used for simulating perforation portholes in the heterogeneous reservoir; A releasing device for releasing a carrying liquid containing a temporary plugging agent to the blasthole temporary plugging model; the pressure and flow detection device is used for detecting and obtaining inlet end pressure data and outlet end flow data of the blasthole temporary plugging model in the blasthole temporary plugging process; The borehole temporary plugging model comprises a shaft simulation part and a heterogeneous reservoir simulation part, wherein the shaft simulation part is used for simulating a shaft, the heterogeneous reservoir simulation part is used for simulating heterogeneous reservoirs with different permeabilities, and a linking area of the shaft simulation part and the heterogeneous reservoir simulation part is of a net structure; The heterogeneous reservoir simulation part comprises a plurality of simulation reservoirs which are adjacent in sequence, each simulation reservoir has different permeability, and the simulation reservoirs are separated by using a gauze to simulate a barrier; The perforation model comprises a plurality of simulated blastholes for simulating perforation blastholes, the simulated blastholes are in one-to-one correspondence with the simulated reservoirs, and the simulated blastholes are arranged in the simulated reservoirs and are used for simulating heterogeneous reservoirs with the perforation blastholes; The pressure and flow detection device comprises an outlet flow measurement device, a pressure and flow detection device and a pressure and flow detection device, wherein the outlet flow measurement device is arranged at the outlet end of the blasthole temporary plugging model and is used for detecting and obtaining flow data of the outlet end of the blasthole temporary plugging model in real time in the blasthole temporary plugging process, and when the blasthole temporary plugging model comprises a plurality of simulated reservoirs with different permeabilities, one outlet flow measurement device is configured for each simulated reservoir; in order to collect the liquid flowing out of the outlet end of the porthole temporary plugging model, when the porthole temporary plugging model comprises a plurality of simulated reservoirs with different permeabilities, an effluent collecting device is configured for each simulated reservoir.
2. The apparatus for simulating a temporary plugging of a blasthole in a heterogeneous reservoir according to claim 1, wherein the blasthole temporary plugging model comprises, but is not limited to, a vertical blasthole temporary plugging model, a horizontal blasthole temporary plugging model, a highly deviated well blasthole temporary plugging model, a cluster well blasthole temporary plugging model, and a well factory blasthole temporary plugging model.
3. An apparatus for simulating a temporary plugging of a borehole in a heterogeneous reservoir according to claim 1, wherein said release means comprises: An intermediate container for storing a temporary plugging agent and carrying a liquid; The high-power pump is connected with the first end of the intermediate container and is used for pumping carrying liquid containing temporary plugging agent to the blasthole temporary plugging model; and the large-size temporary plugging ball adding device is connected with the second end of the intermediate container and is used for adding the large-size temporary plugging balls into the carrying liquid containing the temporary plugging agent.
4. A device for simulating a transient plugging of a borehole in a heterogeneous reservoir according to claim 3, wherein the device comprises: A first valve disposed at a second end of the intermediate container; The second valve is arranged at the outlet end of the temporary plugging ball adding device; and the third valve is arranged at the inlet end of the blasthole temporary plugging model.
5. The apparatus for simulating a temporary plugging of a borehole in a heterogeneous reservoir according to claim 1, wherein said pressure and flow sensing means further comprises: And the inlet pressure measuring device is arranged at the inlet end of the blasthole temporary plugging model and is used for detecting and obtaining the pressure data of the inlet end of the blasthole temporary plugging model in real time in the blasthole temporary plugging process.
6. A method of simulating a temporary plugging of a borehole in a heterogeneous reservoir, the method being performed by an apparatus according to any one of claims 1 to 5, the method comprising the steps of: simulating heterogeneous reservoirs with different permeabilities through a blasthole temporary plugging model; simulating a perforation blasthole in a heterogeneous reservoir by a perforation model arranged in the blasthole temporary plugging model; releasing carrying liquid containing temporary plugging agents to the porthole temporary plugging model through a release device; And detecting by a pressure and flow detection device to obtain inlet end pressure data and outlet end flow data of the stemming temporary blocking model in the stemming temporary blocking process.
7. A storage medium containing a series of instructions for performing the method steps of claim 6.

Description

Equipment and method for simulating temporary blocking of heterogeneous reservoir blasthole Technical Field The invention relates to the technical field of oil and gas field development fracturing yield improvement, in particular to equipment and a method for simulating temporary plugging of a blasthole of a heterogeneous reservoir. Background The hydraulic fracturing yield increasing transformation is an important technology for unlocking the potential of deep and compact unconventional oil and gas reservoirs and realizing economic development. Because of the natural crack development of unconventional oil and gas reservoirs and strong reservoir heterogeneity, the single main crack transformation generated by traditional hydraulic fracturing has small volume and low efficiency of communicating with the natural crack, and the uniform and efficient transformation of a huge thick layer (vertical well) and a long horizontal well section (horizontal well) can not be realized. Compared with the traditional mechanical layering/segmentation construction, the method has the advantages of long time consumption, high difficulty, high risk and cost, high efficiency, safety and economy of chemical temporary blocking, and gradually becomes a main layering/segmentation method. The temporary plugging is realized by using a temporary plugging material, which is the chemical temporary plugging method with the widest application and the most prospect at present, and is characterized in that a temporary plugging ball (or the temporary plugging ball is mixed with powder, particles, fibers and the like) is pumped in to plug a perforation blast hole, so that subsequent fracturing fluid is forced to turn to an unmodified area, and layering/segmented modification is realized. The prior art (CN 104963672A) discloses a reservoir reconstruction method for forming a fracture network by temporarily plugging a borehole by a clean steering material, which comprises the steps of injecting fracturing fluid/active fluid into a stratum to form a fracture, injecting carrier fluid containing temporary plugging material into the fracture and the corresponding borehole, and finally using fracturing fluid to replace the fracture fluid to finish the segmented fracture network reconstruction of the reservoir, the prior art (CN 110608019A) discloses a steering layered fracturing experiment simulation device and a using method thereof, a high-strength transparent material is used for simulating a sleeve and perforating, the device can simulate and observe dynamic plugging of the perforating borehole in real time, and the prior art (CN 110887645A) discloses a device and a method for testing temporary plugging ball seat sealing of the borehole in a shale gas horizontal well pipe, wherein perforation guide pipes distributed radially are arranged in the circumferential direction of the sleeve, so that the time, the efficiency and the pressure-bearing capacity of the temporary plugging of the borehole can be simulated under the conditions of different temporary plugging ball particle sizes, displacement and the like. However, the prior art related to the temporary plugging of the blasthole mainly focuses on a temporary plugging process, a temporary plugging device of the blasthole and a preparation method of a temporary plugging agent. The conventional borehole temporary plugging device can simulate the borehole temporary plugging process and effect, but does not consider the influence of reservoir heterogeneity on borehole temporary plugging. Aiming at the problems in the prior art, the invention provides equipment and a method for simulating temporary plugging of a blasthole of a heterogeneous reservoir. Disclosure of Invention In order to solve the problem that the prior art cannot simulate the temporary blocking of the blasthole of the heterogeneous reservoir, the invention provides equipment for simulating the temporary blocking of the blasthole of the heterogeneous reservoir, which comprises: a blasthole temporary plugging model for simulating heterogeneous reservoirs having different permeabilities; the perforation model is arranged in the porthole temporary plugging model and is used for simulating perforation portholes in the heterogeneous reservoir; A releasing device for releasing a carrying liquid containing a temporary plugging agent to the blasthole temporary plugging model; The pressure and flow detection device is used for detecting and obtaining inlet end pressure data and outlet end flow data of the blasthole temporary plugging model in the blasthole temporary plugging process. According to one embodiment of the invention, the blasthole temporary plugging model comprises, but is not limited to, a straight well blasthole temporary plugging model, a horizontal well blasthole temporary plugging model, a high-inclination well blasthole temporary plugging model, a cluster well blasthole temporary plugging model and a well factory blasthole te