Application of volume fracturing technology in deep tight sandstone gas reservoirs in Tuha oilfield
The deep tight sandstone oil(gas)reservoir in Qiudong sag of Taibei sag in Tuha oilfield is characterized by deep burial,medium-strong water sensitivity,low porosity,ultra-low permeability and strong heterogeneity.The reservoir temperature is high(140～150℃),and the conventional fracturing technology measures in early oil test have poor effect and cannot be economically used.With the oilfield production,the volume fracturing technology of horizontal wells in the deep tight sandstone oil(gas)reservoir in Qiudong sag of Taibei sag in Tuha oilfield has been solved.Through lithology evaluation,in-situ stress analysis,fracturing fluid system and proppant combin ation,detailed research and field application have been carried out,forming the main fracturing process route of the block.It effectively solves the technical problem that deep tight sandstone reservoirs cannot be used,and pro-vides strong technical support for oilfield production.
deeptight sandstonelow porosity-extra low permeabilityhorizontal well and volumetric fracturing
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