| The domestic and international research and practice show that fracturing transformationis low permeability, low permeability sandstone reservoir high efficiency of the most effectivemeans of development. But fracturing transformation exists a duality: on the one hand, thecrack formation high diverting capacity, improve the percolation flow channel; On the otherhand fracture fluid into the reservoir, will bring partial damage. So, for low permeability, lowpermeability reservoir production transformation, should be in to reduce as far as possible onreservoir damage, and on the basis of the construction scale, optimize fracturing made longseam, so as to improve the yield of single well.This article in view of the extension of the ancient world gas field born gas reservoircharacteristics and CO2foam fracture characteristics, carried out the fracturing of thedepartment of VES clean liquid screening study and evaluation, and using high parameterfoam circuit simulation fracturing construction conditions, to evaluate the VES-CO2foamfracture fluid rheological properties, static suspended sand performance, dynamic performancewith sand, for field application provides experiment basis, and carried out the fracturingfracture parameters and CO2foam fracturing construction optimization of parameters, andformulated the VES-CO2foam fracture site construction with liquid with the process,construction procedures and pressure back and other supporting technology solutions liquid.At last, according to try3Wells mountain layer2the physical situation, completed VES-CO2bubble (repeat) fracturing design and field test.This paper studies the formation for prolong life of the ancient world gas reservoirVES-CO2foam fracturing technology, it can not only improve the extension of lowpermeability, low permeability reservoir fracturing transformation technique level, but also foraccurately evaluate reservoir productivity, achieve prolong natural gas production, on the scaleof the provide important technical support. |
PDF Full Text Request