Characteristic Study Of Chang 6 Reservoir In Cao Duo Wan Block Of Yong Ning Oil Field

This article comprehensively uses the theory and method of sequence stratigraphy,structural geology, sedimentary petrology, reservoir geology, petroleum geology, geological logging and other related disciplines, theories and research methods as a guide. Based on logging data, combined with logging, and laboratory analysis of core information, we made researehes of fine reservoir stratigraphic division and correlation of sedimentary facies analysis,reservoir sand body distribution and characteristics of research for the study of Chang6 formation.The Paper conclusion that Chang6 belonged to lake delta plain, the provenance was from north east and mainly developed two deposits micro-phase type of plain distributary channel and interchannel. The sand body distribution strictly controlled by sedimentary facies, channel sand for the skeleton, Chang61, Chang62, Chang63, Chang64 sand body has a good inheritance. Chang 6 reservoir is fine-medium-grained feldspathic sandstore compositional maturity is low, sub-select, etc. Chang 6 reservoir is 9.98% average porosity and permeability average of 0.53 ×10-3μm2, that is belongs to the hole in the low-permeability reservoirs. Diagenesis strong intergranular corrosion hole is the most important types of secondary porosity. Comprehensive evaluation of micro-pore region Chang 6 reservoirs are mainly in low-permeable hole, part of the permeable and low permeability type. Classification and evaluation of the reservoir, the Chang 6 reservoir is typically Ⅲ.We overally examine the sedimentary microfacies, sand distribution, reservoir properties and reservoir comprehensive evaluation of various factors, Selecte the favorable area for prospecting of Chang6 formation. These above Provide evidences for further exploration and exploitation.