Experiment device and method for stimulating current-limiting and sectional fracturing of horizontal well

Abstract

The invention relates to the technical field of oil field exploitation and discloses an experiment device and method for stimulating current-limiting and sectional fracturing of a horizontal well. The experiment device comprises a plurality of sealed stimulated reservoir cavity bodies connected through pipelines, wherein horizontal well tubes are arranged in the stimulated reservoir cavity bodies, a plurality of bullet holes capable of being turned on or off are arranged on the cavity body walls of the horizontal well tubes, adjacent horizontal well tubes are connected through pipelines with pipe diameter selectable, liquid inlet ends of the horizontal well tubes are communicated through a sand mulling system, the connection pipelines are further provided with plunger pumps, flow meters and valves, a plurality of pressure sensors are arranged in the stimulated reservoir cavities and the horizontal well tubes and respectively connected with a data acquisition control panel through cables, and the data acquisition control panel is connected with a computer. The experiment device can perform stimulation experiments on sectional fracturing of the horizontal well according to the underground reservoir distribution condition so as to study the hole friction and erosion and the on-way friction resistance law during the sectional fracturing construction of the horizontal well, and bullet hole parameters can be optimized; and optimization on the horizontal sectional fracturing construction parameters can be facilitated.

Description

technical field [0001] The invention relates to the technical field of oil field exploitation, in particular to an experimental device and an experimental method for simulating flow-limited staged fracturing of a horizontal well. Background technique [0002] The development of horizontal wells has become an important way to improve the comprehensive benefits of oilfield exploration and development. Most low-permeability oilfields require horizontal well fracturing to achieve efficient development of oil and gas reservoirs. Simultaneously staged fracturing of layers. Due to the complex distribution of underground reservoirs, it is impossible to conduct repeated construction experiment analysis in order to optimize the parameters of staged fracturing operations in reservoirs during the flow-limited staged fracturing construction of reservoirs. Because it is necessary to simulate the flow-limited fracturing process and parameters indoors, and then optimize the actual flow-lim...

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Problems solved by technology

[0003] The current design and construction technology of flow-limited staged fracturing in horizontal wells are mainly optimized by theoretical calculations and post-fracturing tests; however, there are the following problems: 1. There is no experimental device and equipment for simulating flow-limited staged fracturing in horizontal wells. method

2. Lack of effective experimental data to optimize perforation parameters, fracturing fluid and horizontal well section friction calculation of sand-carrying fluid under different sand ratios, research on hole erosion law and the impact of different displacements on the amount of sand added in each section

3. There is no method to adjust the formation pressure of the two perforation sections

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