Research On The Reservoir Characteristics Of The Dalinghe Oil Layer Of Block Shu1-38-32 In Liaohe Western Depression

Fully based on the use of drilling and logging data,combining the regional geology background,sediment condition and diagenism characteristics,this investigate is systematically studying the reservoir characteristics of the Da Linhe oil layer of Block Shu1-38-32.In the course of the study,according to the stratigraphic comparison and division principle,the top and bottom of the oil-bearing section are controlled by the marker layer.According to the sedimentation cycle(auxiliary marker),the oil layer can be divided into the oil layer,the sandstone group and the sedimentary rhythm subdivision layers.On the basis of petrology,sedimentology and core data,the sedimentary facies model is established,the logging facies is divided,and the longitudinal evolution and the distribution law of the plane of the sedimentary microfacies are studied.Carry out the research on reservoir characteristics,including petrology,physical properties,four-sex relationship,heterogeneity,micro-pore structure,etc.Study the occurrence and the plane distribution law of the interlayer and what effect they can do on the reservoir development result.Based on the research,the study block is located at the root to the middle of the fan of the off-shore gravity flow under water fan.The reservoir is mainly composed by the sandstone of the distributary channel.The sediment came from the western bulge which was located at the western of LiaoHe fault depression western sunken.The mineral compartment of rock is alpha quart,feldspar and rock debris.The elements of rock debris are mainly igneous rock.The compositional maturity and textural maturity are quite low.The sandstone is continuous distribution in the plane.The average thickness for the single well is 70 meters.The largest thickness of the sandstone is in the middle part,which is reduction to all around.The main cementation type is substrate system.The pore type cementation is limited between the small grains.The reservoir stratum is belonging to the high porosity and permeability.The pore-type identified is mainly protogenesis intergranular pore,and it is complementary by the fracture.The throat of the reservoir is middle to the large construction.There is no stable mudstone interlayer in the oil sandstone.The extended distance of the interlayer which is unstable commonly less than half of the well spacing.The shape of the interlayer is lentoid distributed and the number of the interlayer is small.The anisotropy of the DaI2 to III1 reservoir is weak,and it became larger in the Da1.The anisotropy of the DaIII2 is the largest.