Taking a block of an oilfield as the engineering background, by analyzing the relationship between lithology and electrical properties, physical properties and electrical properties, as well as the relationship betwee...Taking a block of an oilfield as the engineering background, by analyzing the relationship between lithology and electrical properties, physical properties and electrical properties, as well as the relationship between oil-producing properties and electrical properties, four diagrams, namely, well right diagram, spontaneous potential curve, natural gamma curve, microelectrode curve, acoustic time difference curve, 4.0 m apparent resistance curve (2.5 m) and induction curve, were obtained, and porosity data (acoustic time difference) and induction curve were determined. It is suggested to establish an empirical formula by using acoustic time difference curve and tank porosity analysis, and further determine the limit thickness as fine sandstone. Through comprehensive analysis of the lower limit thickness of effective lithology and the lower limit electrical property of oil-bearing category, it is concluded that the oil-bearing category is oil-bearing category. The effective thickness is determined by using geological records of adjacent wells, laboratory analysis and oil testing (production) data and interlayer is subtracted, which provides an important reference link for determining the thickness of such tanks.展开更多
文摘Taking a block of an oilfield as the engineering background, by analyzing the relationship between lithology and electrical properties, physical properties and electrical properties, as well as the relationship between oil-producing properties and electrical properties, four diagrams, namely, well right diagram, spontaneous potential curve, natural gamma curve, microelectrode curve, acoustic time difference curve, 4.0 m apparent resistance curve (2.5 m) and induction curve, were obtained, and porosity data (acoustic time difference) and induction curve were determined. It is suggested to establish an empirical formula by using acoustic time difference curve and tank porosity analysis, and further determine the limit thickness as fine sandstone. Through comprehensive analysis of the lower limit thickness of effective lithology and the lower limit electrical property of oil-bearing category, it is concluded that the oil-bearing category is oil-bearing category. The effective thickness is determined by using geological records of adjacent wells, laboratory analysis and oil testing (production) data and interlayer is subtracted, which provides an important reference link for determining the thickness of such tanks.
