Research On Geological Characteristics And Evaluation On Potential Of Addiitonal Reserves For Mao805-mao807Blocks

From the tectonic perspective, Mao805-Mao807blocks located in the transition zonebetween Sanzhao SAG in songliao basin and furrow in Chaoyanggou, and in dipping parts ofthe NNW structural nose in Toutai, the main part located in Southwest terrace ofChaoyanggou. In recent years, this blocks is an important areas that for turning over controlof oil reserves and proving reserves, and is a typical of low-permeability oil reservoirs. Withthe large-scale development of oil field, the Blocks have exposed the following problems,such as low prediction of reservoir level, understanding of the structures and fault does notclear, complex oil-water distribution, and potential distribution is not clear. In order to betterdevelopment the area that has submitted to the reserve, we need to fine evaluate the reservoir,at the same time, in order to develop additional reserves, we need to study the feasibility ofexpansion well in Putaohua reservoir and Fuyu Reservoir, and preferentially select thefavorable block, complete the evaluation on potential of additional reserves and welldeployment of the appraisal well.In this paper, on the basis of collation and analysis of the data for all the evaluation wellsand development wells in the studied blocks, first we carefully explains the characteristics ofstructure, fault block, reservoir distribution and oil-water separation for the blocks have beendeveloped, to guide The late development of oilfield and adjustment of oilfield water injection;Secondly, for the expansion blocks, Using the seismic inversion and fine sedimentary faciesdescription technology, we predict the development status of reservoir and characteristics ofspatial distribution, to guide the well site deployment; At last, we study the main factors ofreservoir forming for Fuyu reservoir, and master the oil-water distribution rule, to guide thelater large-scale development.On the basis of the study in the reservoir, structure, oil-water and so on, we selectfavorable block, and arrange9recommendation well, these have important guidingsignificance for the block later large-scale development.