Tight oil reservoir horizontal well staged fracturing fracture parameter design method

Abstract

A tight oil reservoir horizontal well staged fracturing fracture parameter design method comprises the steps: acquiring tight oil reservoir geological development data, and establishing a staged fracturing horizontal well development numerical simulation model through the tight oil reservoir geological development data; changing the parameter combination value of the crack spacing and the crack flow conductivity in the horizontal well development numerical simulation model, and calculating the effective production time and the effective cumulative oil yield under the current parameter combination value; establishing a relation curve between the daily average oil production capacity of the tight oil reservoir staged fracturing horizontal well and a fracturing production increasing potentialfactor; and according to the daily average oil production capacity design value of the tight oil reservoir staged fracturing horizontal well, determining the fracture interval and fracture flow conductivity parameter combination value of the staged fracturing horizontal well. According to the tight oil reservoir horizontal well staged fracturing fracture parameter design method, the fracture spacing and fracture flow conductivity combined scheme matched with the daily average oil production capacity design value of the tight oil reservoir staged fracturing horizontal well can be rapidly and accurately determined, and the tight oil reservoir horizontal well staged fracturing fracture parameter design method is beneficial to improving the staged fracturing design efficiency of the tight oilreservoir horizontal well.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method for designing fracture parameters of staged fracturing of horizontal wells in tight oil reservoirs. Background technique [0002] my country is rich in tight oil reservoir resources, which are widely distributed in the Songliao, Ordos, and Sichuan Basins. It is generally believed that the most effective way to develop tight oil is multi-stage fracturing stimulation of horizontal wells, and to ensure the effect of fracturing stimulation, it is necessary to provide a complete fracturing construction design plan before on-site construction. Among many design parameters, the selection of fracture spacing and fracture conductivity has an important impact on the stimulation effect of horizontal well staged fracturing design and post-fracture production efficiency. [0003] In the prior art, the invention patent with the application number 201410168072.7 ...

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Problems solved by technology

[0004] However, most of the existing staged fracturing fracture parameter design methods are optimized for specific horizontal wells to be fractured, lacking the universality of blocks or even similar reservoirs, and most of them need to be solved by complex mathematical models. , it is difficult to apply for ordinary designers on site, and the efficiency of fracturing design is low

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