Reservoir modification method of low-seepage heavy oil reservoir

Abstract

The invention provides a reservoir modification method of a low-seepage heavy oil reservoir. The reservoir modification method of the low-seepage heavy oil reservoir comprises the steps of 1, determining reservoir parameters, and selecting a test site; 2, determining the reservoir compressibility of the test site; 3, determining the well wall stability and the eyelet stability under the reservoircondition of the test site; 4, determining the fracture shape of radial eyelet auxiliary fracture under a specific reservoir condition of the test site; 5, determining radial eyelet parameters; 6, determining the single well production cost and the construction cost, and then determining the exploitation economy. By means of the reservoir modification method of the low-seepage heavy oil reservoir,efficient development of the deep-layer low-seepage sensitive heavy oil reservoir can be achieved, existing technological difficulties are overcome, theoretical support is provided for the exploitation of the oil reservoir, and theoretical insufficiencies of an artificial diversion system in the reservoir exploitation technology are made up for.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a reservoir reconstruction method for low-permeability heavy oil reservoirs. Background technique [0002] Due to the influence of rock mechanical properties, reservoir physical properties, sensitivity and fluid properties, low-permeability heavy oil reservoirs have extremely low mobility, and the reservoir lithology has dual characteristics of heavy oil unconsolidated sandstone and low-permeability tight sandstone. It is characterized by strong sensitivity and extremely difficult development, and effective production must be achieved through reservoir stimulation. Field tests have shown that both fracturing sand control and hydraulic radial jetting can improve seepage, but none of them has achieved a breakthrough in production capacity. For this reason, we invented a new method for reservoir reconstruction of low-permeability heavy oil reservoirs, which solved the...

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Problems solved by technology

[0002] Due to the influence of rock mechanical properties, reservoir physical properties, sensitivity and fluid properties, low-permeability heavy oil reservoirs have extremely low mobility, and the reservoir lithology has dual characteristics of heavy oil unconsolidated sandstone and low-permeability tight sandstone. characteristics, strong sensitivity, and extremely difficult development, effective production must be achieved through reservoir stimulation. Field tests have shown that both sand control through fracturing and hydraulic radial jetting can improve seepage, but none of them has achieved a breakthrough in production capacity

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