commonly used environmental flow evaluation techniques range in complexity. some requires stream flow records alone, and some accounts for the habitat requirements of individual species life-stages and physical characteristics of the stream. hydrological based methods for environmental flow assessment are the first step in planning for environmental allocation in developing countries. for deter...

Accurately predicting oilfield development indicators (such as oil production, liquid current formation pressure, water cut, production rate, recovery cost, profit, etc.) is to realize the rational and scientific of oilfields, which an important basis ensure stable oilfield. Due existing index prediction methods being difficult accurately reflect complex nonlinear problem in field process, usin...

Abstract After a century of development, China's petroleum industry has introduced numerous and various industrial heritage elements, which collectively embody the value significance heritage. Currently, all levels government departments are trying to protect heritage, but only limited types elements included in official conservation lists, is not conducive systematic To achieve this study glob...

The reservoir in different parts of buried-hill draping zone is often quite different, so it great significance to clarify the characteristics for exploration and development. Based on core, well logging, seismic data production data, oil layer Ⅱ lower second member Dongying Formation L oilfield, Bohai Bay Basin, offshore eastern China are systematically studied. Analyses facies, well-seismic c...

C oilfield is a heavy oil field developed by horizontal wells and single sand body in Bohai oilfield. The edge bottom water of the reservoir active natural energy development mode adopted. comprehensive cut was 95.3%, which had entered stage high production. Some reservoirs were limited crude viscosity column height. Under condition existing well pattern, some reserves not produced or degree pr...

After long-term water flooding development in old oilfields, oil layers are generally flooded. Accurate and rapid recognize the layer is key to later infill well layout plan adjustment. In this paper, taking Xingbei area of Daqing Oilfield as an example, on basis clarifying characteristics water-flooded curve, through logging curve optimization, data preprocessing algorithm model optimization p...