Fishbone well injection-production experimental device
An experimental device, fishbone well technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problem of difficulty in judging the water breakthrough time and contribution of the main wellbore and lateral wellbore, and the shooting of the main wellbore and lateral wellbore. The location and number of holes are limited, and they cannot meet the needs of different experimental conditions.
Pending Publication Date: 2022-07-29
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology
[0004] This application provides a fishbone well injection and production experimental device, which is used to solve the problem that the main wellbore and branch wellbore of the fishbone well model in the prior art share the main wellbore circulation channel, and it is difficult to judge the water breakthrough time and contribution of the main wellbore and branch wellbore. , and the location and number of perforations in the main wellbore and branch wellbore are limited, which cannot meet the needs of different experimental conditions
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[0028] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.
[0029] First, the terms involved in this application are explained:
[0030] Water breakthrough time: refers to the time when water starts to flow out from the output end of the production well;
[0031] Contribution: refers to the ratio of the number of effective or useful results to the amount of resource consumption, that is, the ratio of output to input, or the ratio of income to cost. In th...
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The invention provides a fishbone well injection-production experimental device. The device comprises a visual model, a fishbone well, an injection well and a locking switch, an inner cavity of the visual model is used for being filled with quartz sand, and the injection well and the fishbone well are arranged in the inner cavity of the visual model and used for injecting water / oil into the inner cavity of the visual model and discharging water / oil out of the inner cavity of the visual model. The fishbone well comprises a main shaft, branch shafts, a main shaft circulation channel, branch shaft circulation channels and perforations, the main shaft is connected with the main shaft circulation channel, the branch shafts are connected with the branch shaft circulation channels, the branch shafts are connected with the main shaft at preset angles, and the main shaft and branch shaft bodies are each provided with the multiple perforations. The locking switch is connected with the main shaft circulation channel and the branch shaft circulation channel and used for controlling the flow of the main shaft output end and the branch shaft output end of the fishbone well. According to the device, the water breakthrough time and contribution degree of the main shaft and the branch shaft can be conveniently distinguished, the perforation position and number are controllable, and different experiment condition requirements can be met.
Description
technical field [0001] The application relates to the technical field of injection and production of oil and gas fields, in particular to an experimental device for injection and production of fishbone wells. Background technique [0002] Fishbone well is a kind of multilateral well, also known as fishbone-shaped horizontal branch well, fishbone well includes main well and branch well. Fishbone well technology is an important method in the process of oil and gas field development, which can reduce the cost of oil production per ton, improve oil drainage efficiency, and achieve the effect of improving oil recovery. [0003] Before the development of fishbone wells on site, indoor physical simulation experiments are generally carried out. The structure of the injection-production experimental device used in the existing indoor physical simulation experiment includes a fishbone well model, and the fishbone well model is used to simulate the actual production of oil and gas wel...
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IPC IPC(8): E21B47/002E21B43/20
CPCE21B47/002E21B43/20
Inventor 黄世军杨明洋赵凤兰闫成双
Owner CHINA UNIV OF PETROLEUM (BEIJING)