Fine Reservoir Description Of A 31 Fault Block

A 31 fault block is the main block of Anan oilfield,since 1989,since put into development,has experienced two layers subdivision,well pattern encryption and late water and oil comprehensive management,and achieved good development results,water Flooding recovery rate of 41%.With the development of the degree of deepening,the development of increasingly prominent contradictions,the old area current block of oil recovery rate of only 0.78%,water 89.5%,"layer is unclear,well pattern is not perfect,well condition difference" has become three major factor to improve oil recovery of the A 31 block.Based on the sequence stratigraphy and the regional geological background,this paper is based on the original data of the detailed system,with the advanced practical technology as the means,with solid,systematic and meticulous work as the guarantee,based on the new three-dimensional data,taking into account the multi-data comparison verification,multi-disciplinary organic combination,according to the principle of "fine implementation of the structure,fine stratigraphic comparison,fine description of the reservoir".This paper conducted a comparison of oil group levels.On this basis,a small layer and a single sand layer was fine,and three-dimensional construction model was established based on the in-situstratification and top-surface figure and constrainted with fault plane.Using deterministic modeling and the sedimentary microfacies plan the lithofacies model was established.Then using phased modeling method the reservoir attribute model was established.Through this study,we have a more accurate understanding,and laying a foundation on finding out the remaining oil distribution and planing adjustment program.