Method for quickly determining multi-stage fracturing transformation mode of tight oil horizontal well

Abstract

The invention relates to the technical field of multi-stage fracturing transformation of tight oil horizontal wells, and particularly discloses a method for quickly determining a multi-stage fracturing transformation mode of a tight oil horizontal well. The method comprises the steps that 1, geological data and fracturing construction data of a target well area are sorted out, and a tight oil reservoir hydraulic fracturing crack propagation simulation model is established; 2, crack propagation simulation of hydraulic fracturing under different parameter combinations is carried out; 3, underground fracturing fracture forms under different parameter combinations are judged, and a fracture form recognition plate for hydraulic fracturing of the tight oil reservoir is established; and 4, counting the parameter combination value of the target well area, and quickly determining the multi-stage fracturing transformation mode of the tight oil horizontal well. According to the method, the fractal dimension of fracture distribution of hydraulic fracturing under the combination of typical natural fracture density and horizontal ground stress difference parameters is calculated, the undergroundfracturing fracture form is judged, and the tight oil horizontal well multistage fracturing transformation mode is quickly determined by establishing a tight oil reservoir hydraulic fracturing fracture form recognition chart.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to the technical field of multi-stage fracturing reconstruction of tight oil horizontal wells. Background technique [0002] my country is rich in tight oil reservoir resources, which are widely distributed in Songliao, Ordos, and Sichuan Basins. Fracturing is the most effective technical means for the development of tight oil reservoirs. At the same time, the multi-stage fractures and fracturing scale generated by fracturing are also determined by the well pattern deployment. important reference. Therefore, in order to ensure the effect of fracturing stimulation and improve the pertinence of fracturing scheme design, it is necessary to determine the multi-stage fracturing stimulation method suitable for the actual tight oil reservoir conditions before the field construction scheme design, which has always been an urgent problem to be solved in oilfields . [...

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Problems solved by technology

[0004] However, the comprehensive cost of the existing tight oil reservoir stimulation technology shown above is still relatively high. At the same time, due to the strong heterogeneity of tight oil reservoirs and the large difference in rock mechanical properties, cutting fracturing and fracture network fracturing technologies Applicable geological conditions also need to be further understood, and the fracture morphology of multi-stage fracturing still needs to be described by means of microseismic monitoring after fracturing, and it is still impossible to determine the appropriate fracturing method before the multi-stage fracturing operation plan of tight oil horizontal wells is designed.

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