Technology countermeasures of improving single well productivity of Chang 7 tight oil reservoir of Hujianshan oilfield

Chang 7 formation of Hujianshan oilfield in Ordos basin has a big resource potential. At present, the probable reserve is 1.3×108 t, with characteristics of low reserves abundance, developed barrier and interbedded layers, poor reservoir property, big development difficulty and low single well productivity, with less than 2.0 t per well. Around the theme of "improving single well productivity and enhancing development benefit", through characteristics analysis of structure, sedimentary facies and development situation, and comparision evaluation of production testing and formation testing of 6 different kinds of well pattern and spacing has been carried out and then the technology countermeasures of improving single well productivity have been achieved, which provides reference opinions for increasing production and enhancing benefit in the later period of the area.