A Fracturing Technology Realizing Ultra-High Conductivity

Abstract

The invention relates to a fracturing technology for implementing the ultrahigh flow conductivity, which comprises the following steps: 1, judging whether geomechanics parameters of a target reservoir is suitable for the fracturing technology disclosed by the invention or not; 2, judging whether completion perforation of a target well is suitable for the fracturing technology disclosed by the invention or not, and if no, changing a perforating scheme of a well bottom; 3, before fracturing, selecting related fracturing materials; 4, carrying out fracturing on the target well by using a unique pumping program of the fracturing technology disclosed by the invention. According to the fracturing technology, proppant struts are formed in a stratum; flow conductivity of a stratum fracture is not improved by a filling layer of a proppant, but oil gas passes through by passages between the proppant struts; the flow conductivity is obviously improved by the open flowing passages; the flow conductivity of an existing conventional fracturing technology is not more than 200mum<2>*cm generally, but the flow conductivity of the fracturing technology for implementing the ultrahigh flow conductivity, which is disclosed by the invention, is higher than that of the conventional fracturing technology by 1 to 3 orders of magnitude; the fracturing technology reduces a pressure drop in the fracture, is helpful for improving drainage capacity and increases the effective fracture half-length and the production increase volume of the reservoir so as to improve yield.

Description

technical field [0001] The invention relates to a fracturing process for realizing ultra-high conductivity, and belongs to the technical field of oil and gas field development and research. Background technique [0002] Low-permeability, ultra-low-permeability, and unconventional (such as coalbed methane, shale gas, tight sandstone oil and gas) oil and gas reservoirs in China are widely distributed and have huge reserves. Among various production stimulation measures, hydraulic fracturing is a commonly used and effective method. In hydraulic fracturing, whether a high fracture conductivity can be formed is the key to hydraulic fracturing operations, so the placement of proppant in fractures plays a vital role in the success of the operation. [0003] At present, in domestic oilfield field fracturing, there are mainly two injection forms of proppant in fractures: one is to continuously inject proppant of one specification into formation fractures during construction; the oth...

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Problems solved by technology

These injection methods mainly improve the conductivity of fractures through the filling layer of proppant. This method can improve the conductivity of fractures, but because the fracturing fluid gel-breaking residues and proppant broken particles will block the pores, it is still difficult to The internal contamination of the fracture caused by the embedding of proppant will greatly reduce the conductivity of the fracture, and the fracture permeability measured by the well test after fracturing is often far lower than the value measured in the laboratory

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