Research By1061Well Area Of Reservoir Rock

In this paper， logging data， studied the Southern District of Ordos Basin oil wellsrocky marsh Chang6reservoir rock characteristics Chang4+5oil group， diagenesis andpore structure of the microscopic characteristics and reservoir evaluation.4+5sedimentaryanalysis phase is mainly sedimentary plains long delta plain， long six major delta front，where long4+51，4+52mainly developed long distributary channel， floodplain，crevasse splay and natural levee and other micro-phase， length of6major delta frontfacies， mainly developed underwater distributary channel， between the bay and the rivermouth bar microfacies. Distributary channel， underwater distributary channel primarily in aNE-SW trending，provenance study area should mainly come from the north east direction.4+5long，long six reservoirs are mainly feldspathic sandstone，high debris content，lowcompositional maturity. Sorting， etc.-well， second round sub-angular， high texturalmaturity. Compaction is deteriorated Yanchang main reason; cementation make poorreservoir properties， secondary porosity formation and dissolution improve reservoirreservoir performance. Chang4+5， Chang6reservoir mezzanine density and frequencywere higher permeability coefficient of variation， differential high， strong heterogeneity.Comprehensive Evaluation of Chang4+5， Chang6reservoir can be divided into threecategories， the first category expulsion reservoir pressure and low pressure values， theaperture is the hole; throat throat is fine hole， mainly in fine-grained sandstone and finesandstone， is a major oil reservoir in the study area. The second category mediandisplacement pressure and the pressure medium and small pore throat radius， is a small hole-the hole; throat is a micro throats. Such reservoirs are mainly found in the delta plain andthe leading edge of the embankment deposited thin-siltstone， poor physical properties， oilis generally poor or no oil. The third type of reservoir pressure and high expulsion medianpressure， pore throat radius is small， the case pores-pore type， pore throats are-Microthroat， pore throat sorting poor， thin crooked degrees.