Discussion of Triassic Chang7 ordos basin tight reservoir production techniques

With the recent years exploration of Hujianshan oilfield advanced,Chang-7 pay zone exhibits greater lateral continuity,large-scale, and contributes to many production wells, thus showing a promising prospect. Chang7 reservoir is of 8.9 % average porosity with 0.19 mD permeability,which is considered to be tight reservoir.With the beginning of production tests in 2010,multiple problems have been revealed.For example,effective waterflooding system is hard to establish,production decline is far from optimistic,single well productivity remains low,plus swept layers.Under these circumstances,by comparing the outcomes of a number of production tests conducted in recent years,this paper is casting light on the aspects of horizontal wells' network pattern and reservoir reconstruction parameters to discuss production techniques of Chang7 reservoir.