Oil and gas reservoir test fracturing method and oil and gas reservoir fracturing method

Abstract

The invention relates to the technical field of oil well exploitation, and specifically provides an oil-gas reservoir test fracturing method and an oil-gas reservoir fracturing method based on the test fracturing method. The oil and gas reservoir test fracturing method provided by the invention can recognize the actual characteristic parameters of the reservoir in a short time and can adjust and optimize the construction parameters accordingly. In the oil and gas reservoir fracturing method provided by the present invention, the integration of test fracturing and main fracturing is integrated, and the pump stop time between test fracturing and actual fracturing construction is very short, which can effectively reduce construction time and save construction costs, and Improve the effect of fracturing.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an oil-gas reservoir testing and fracturing method and an oil-gas reservoir fracturing method. Background technique [0002] During the fracturing design and construction of exploration wells, pre-exploration wells and evaluation wells, it is difficult to obtain various reservoir characteristic parameters required for fracturing design due to the lack of reservoir geological characteristic data and limited evaluation methods. Therefore, it is necessary to carry out small-scale test fracturing before the formal main fracturing construction, in order to obtain accurate key reservoir parameters such as comprehensive fluid loss coefficient, natural fracture characteristics, and in-situ stress. [0003] At present, after small-scale test fracturing, it is necessary to stop the pump for a long time, generally determined by 1 to 2 hours, so as to calculate parameters such as fractu...

AI Technical Summary

Problems solved by technology

For medium-permeability reservoirs, a pump stop time of 1 to 2 hours is appropriate, but it may not be enough for ultra-low permeability and ultra-low permeability reservoirs, because the fractures may not be closed at this time. Closing pressure may not be accurate

[0004] In addition, the current small-scale test fracturing is generally tested separately, and the pump needs to be stopped for a long time before the main fracturing operation, so it is not only time-consuming, but also requires a lot of construction costs alone

In addition, sometimes the construction pressure in the wellbore is abnormal because the mud is not cleaned, and the blockage such as mud has been blocking the smooth extension of the fracture during the fracture expansion process, which cannot truly reflect the actual situation of the reservoir. There may be a risk of being forced to stop the pump and suspend the construction

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