The Study Of Resivoirs Deposition Characters In The North Of Songfangtun Oil Field

Defining the provenance by the method of both heavy mineral and S/L,both core description and grain size analysis attest depositional environment,and establish 9 kinds of macrofacies standard facies model.there are detail classifies for macrofacies in plain.the main resivoirs are included in underwater distributary channel , mouth bar . putaohua resivoirs belong to middle pore-low permeability resivoirs,resivoirs physical property distribute disproportionation from plain.Aeolotropism is strong,resivoirs property change is obvious from vertical,PI52,PI6 sedimentary units'property distribute more well,PI1,PI9 are worst;that's B/C of both sedimentary environment and diagonis'infuluence.The pore structure study demonstrate that putaohua resivoirs have high breakthrough press,low pore throat match,high clay mineral contain and so on by the method of mercury penetration,cast,SEM.micronegation is strong,there are a little relationship between pore structure character parameters and poroty,permeability.putaohua resivoirs can be divided into 3 kinds of resivoirs,that's have relationship with microfacies intently.Syrosem feldspar siltstone and commixture siltstone is the mainly distribute in putaohua resivoirs by optic observe. cement styles are hole-slight-regenerate and slight-contact-regenerate,putaohua resivoirs diagnosis mainly are compaction,cement,dissolution,metasomasis.Velocity sensitivity become increase with permeability descent,it become aggravation when corpuscle qulity is more than 8%;it present a little water sensitivity when clear water were flown in;putaohua resivoirs present middle~strong acide sensitivity,the permeability commenly descent after acidify.The sedimentary environment mainly the same from both putaohua resivoirs and fuyang resivoirs comparative analysis,fuyang resivoirs'physical property is less than putaohua resivoirs,fuyang resivoirs micropore develop and pore structure parameters are poor compared with putaohua resivoirs B/C of the strong diagonios.it demonstrate that useless resivoirs have a higher development B/C of the reasonably injection/production relationship compared with putaohua resivoirs in songfangtun oil field.putaohua resivoirs change not very obviously with the development going on through comparative analysis between fang55-57 and fang96-jian103.wo also find that each sand layer's employ extent not high,it can be advanced by further improving the injection/production relationship.