The Comprehensive Study On Yan 9 And Yan 10 Reservoirs In Baitugou Oil Region

At present,most of the oil Wells in baitugou oil area are out of production due to their dependence on the energy production of natural reservoirs.It is urgent to carry out detailed reservoir description research to lay a foundation for the formulation of water injection development plan.In this paper,formation correlation,logging Interpretation,sedimentary facies,sand body distribution,reservoir type and geological reserve recalescence are studied for the bottom-water reservoirs of Yan 9 and Yan10.The specific research results are as follows:the reservoirs of yan-9 and yan-10 are divided into 7 small layers,the dominant phases are the microfacies of the beach and the microfacies of the channel filling,and the distribution of sand body is controlled by sedimentary facies.The reservoir generally presents a slope structure of"east high,west low",but the nose structure of different size is developed locally,these local structures are conducive to oil and gas accumulation.The logging curve interpretation template was established and the logging interpretation was carried out to determine the distribution characteristics of oil and water layers.The geological reserves of the reservoir were 274.85×10⁴t,And then provide the basis for reservoir distribution for the development of cloth wells.Determine the study horizon as low porosity and low permeability reservoir,the reservoir heterogeneity was determined to be weak from three aspects:intra-layer,interlayer and plane.Application of grey relation method,the?,?,?of Yan 9 reservoir accounted for 20%,48%and 32%respectively;the?,?,?reservoir of Yan 10 reservoir accounted for 34%,48%and 18%respectively,And complete the reservoir classification evaluation to identify high-quality areas,And determine Y9₁¹,Y9₁² and Y10₁¹ as high-quality main layer.This study provides geological basis for future development plan adjustment.