Study On Reservoir Characteristic Of Chang-2Member Of Yangma Oilfield

Ordos Basin is one of the earliest discovered oilfields in China, the oil and gas explorationhas made remarkable achievements through several generation of oilman hard working. Tirassicof Ordos Basin is the most important oil-bearing series,and oil-beairng area, oil geologicalreserves and production were increasing year by year. Reservoir type mainly belongs tolithological or con struct-litho logical reservoir, which is also the low porosity and permeabilityoilfield, the reservoir has low mineral matuirty and high textural maturity, its characteristics wereparticle mixed, highly homogeneous, strong compaction, epigenesis, low oirginal intergranularpore.YangMaHe area in WaYaoBao oilifeld located in Zichang county, Shaanxi province,reservoir position located in shanbei slope of Ordos Basin. Reservoir also had samecharacteirstics, such as low porosity, law permeability and low oil saturation, which belonged tolithological reservoir of weak geological tectonic activity. Through years of exploration, it hasbeen found rich oil and gas shows in the exploration areas.However, the following research is much less in the area,such as Chang2reservoir, its sandgroup, small layers of sedimentary microfacies and sand body distirbution. Study of reservoircharacteirstics is far rfom enough, including petrology characteirstics, physical characteirstics,pore structure, diagenesis, reservoir comprehensive evaluation. It would become "bottleneck"which limits development of Chang2reservoir.In order to break through the grasp the research distirct2reservoir distirbution, providetheoretical basis for further exploration and development of science, the research an reservoircharacteirstics, and understanding of reservoir lithology, physical property, Diagenesis and porestructure characteirstics, finally it is necessary to evaluate reservoir.Based on the comprehensivestudies of reservoir detailed, further understand the characteristics of the reservoir, on the wholeblock provides a geological basis for subsequent development.