Study and application of fracture and reform tech for low pressure and heavy dense natural gas reservoir

Abstract

To the features of "four low" (low abundance, low porous pressure, low porosity and low permeability) and "two high" (high water-sensitive damage, high heterogeneity) of Hongtai natural gas reservoir, and actuality of producing sand at postfrac, low production and short constant flow rate period, through technical innovation and progress of fracture technique, a set of technique system has been come into true and the result in field application is obvious. The integrated tech of fracture and putting in to production among them, preventing back flow against proppant is prominent at domestic to supply a powerful technical guarantee for forming a stable production volume of natural gas at 50 million m3 per day which provides a successful experience for exploiting similar gas field.