Staged fracturing yield prediction method of low-permeability gas reservoir horizontal well

Abstract

The invention provides a staged fracturing yield prediction method of a low-permeability gas reservoir horizontal well, and belongs to the fracturing field of the low-permeability gas reservoir horizontal well in development of oil-gas fields. According to the method, horizontal well fracturing design is firstly carried out to obtain original data, then geological modeling is carried out according to the original data to obtain a geological model, finally area network refinement and fracturing crack simulation are carried out on the geological model, and therefore the yield of the horizontal well under different crack parameters is calculated. By combing FracProPT2007 and Eclipse, the staged fracturing yield prediction method of the low-permeability gas reservoir horizontal well can accurately capture the shapes of fracture cracks and flowing parameters of the fracture cracks in each position, can simulate the flowing of multi-layer and multi-phase fluid flowing into the cracks and flowing into a shaft from the cracks, and analyzes the influence of the geometic shapes of the cracks, the flow guide capacity, the crack positions, the interval, the included angle of the cracks, the base material permeability and other parameters on yield, and leakage of fracturing liquid and the flow-back process of the fracturing liquid are taken into account.

Description

technical field [0001] The invention belongs to the field of fracturing of low-permeability gas reservoir horizontal wells in the development of oil and gas fields, and in particular relates to a method for segmental fracturing productivity prediction of low-permeability gas reservoir horizontal wells, which provides effective guidance for fracturing design. Background technique [0002] In recent years, with the advancement of drilling technology and the continuous reduction of drilling costs, horizontal wells have been applied to more and more types of reservoirs, and have become an effective means to convert development methods and improve recovery in low-permeability reservoirs. With the continuous improvement and maturity of fracturing technology, applying fracturing technology to the field of horizontal well production has become a new research direction of horizontal well production technology. In low-permeability oil and gas reservoirs, fracturing horizontal wells to ...

AI Technical Summary

Problems solved by technology

For example, the Eclipse black oil model can be used to simulate the hydraulic fracturing fractures of horizontal wells and calculate the productivity, but this method is extremely cumbersome. It is almost impossible to input the positional permeability, conductivity and other parameters in sequence, and can only take the average value, and the simulation process does not consider the damage of fracturing fluid filtration and flowback after fracturing during the fracturing process, and these factors are especially important for low-permeability gas reservoirs. Important, so such a conventional numerical simulation method is not closely combined with the fracturing design, it is difficult to represent the real fracture properties and it is difficult to truly reflect the post-fracture gas production process, thus bringing inaccurate calculation results of productivity prediction

Images