Baikouquan Formation Of Triassic Of Wu36 Well Block In Wuerhe Oilfild

Wuerhe oil field is located in Wu-Xia fault belt in northwestern margin of Junggar Basin.The sand body of Baikouquan formation is developing in this area, which can be important replacement block in the following reservoir evaluation in this area. Although research in the area has several years of history but mainly for exploration early Permian and Triassic Karamay group, for Baikouquan formation only made some preliminary studies, fine to the oil reservoir level the sedimentary system and the distribution of reservoir quality work is not carried out.The Paper, referring to modern sedimentology and Petroleum Geology,deeply studies the provenance, sedimentary characteristics and reservoir of Baikouquan formation of.Wu36 Well block in Wuerhe oil field with core observation,logging, slice analysis, systemically analyzed the controlling factors of the advantageous reservoir and the distribution.With synthetic application of high resolution sequence stratigraphy and cycle isochronous correlation technology,91 wells were stratigraphic division and correlation. The Baikouquan formation of Triassic in Wuerhe oilfield can be divided into one long-stage semi-cycle,three mid-stage cycles and seven short-stage cycles which are in correspondence with the sandbody development period In the end, delicate sequence stratigraphic framework of Baikouquan Formation of Triassic is built according to these rules.The features of sandstone matrix minerals, heavy minerals and sand body distribution of characteristics of studies identified in the study area Baikouquan group is mainly derived from the northeast. Moreover, according to core logging, core analysis the author studies the sedimentary system of Baikouquan formation of Triassic in research zone.studies show that Baikouquan alluvial fan depositional system, which can be divided into the middle-fan subfacies and the front-fan subfacies and the inter-fan depressions,On the plane, the above subfacies can be divided into braided fluvial channel, cribellate deposit, mudflow deposit, front-fan sheetflod deposit, T1b3 is the important reservoir in study area,which belongs to braided fluvial channel filled Sedimentary and cribellate deposits.By petrology and reservoir microscopic characteristics of the study area to determine Baikouquan reservoir characteristics, study shows Baikouquan porosity 2.1% and 28.7%, average 16.26%; permeability 0.08mD and 1798.59mD, Average 17.67mD. The main types of storage space remaining primary intergranular pores, pore type holes, the small jets-small roar pore, comprehensive evaluation of reservoir porosity and permeability reservoir, the reservoir further divided into three categories, and identified spatial distribution of various types of reservoirs. Finally, quality control factors for reservoir development studies, research shows that sedimentary facies and diagenesis control the quality reservoir development factors.