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××地区为断层控制的断块油田。从1978年下半年勘探以来,已证实该地区为单井日产30～60吨的油田。从开始勘探就对全部有油气显示的井做了数字处理与解释。目前已处理了18口井,见到显著的地质效果。××油田主要含油层为沙二～三段地层,其主要特点是:岩性细,大多为粉砂岩、泥质粉砂岩;含油饱和度低,原油性质轻(一般原油比重小于O.8838,粘度小于30厘泊);孔隙度一般为20～30％,渗透率一般为50～300毫达西;地层水矿化度低(一般为8000～12000PPM)。因此,水层电阻率一般为3～4欧姆米,较好的油层电阻率为7～8欧姆米,仅为
× × area fault-controlled fault block oil field. Since the exploration in the second half of 1978, it has been confirmed that the area is 30 to 60 tons of oilfields per day. From the beginning of exploration, all the oil and gas wells have been digitally processed and interpreted. Has processed 18 wells, to see the significant geological effects. The main oil-bearing layer in the ×× Oilfield is the second to the third member of the strata. Its main features are: fine lithology, mostly siltstone and argillaceous siltstone; low oil saturation and light crude oil (the proportion of common crude oil is less than O.8838, Viscosity less than 30 cps); porosity is generally 20 to 30%, permeability is generally 50 to 300 millidarcy; formation water salinity is low (usually 8000 ~ 12000PPM). Therefore, the water layer resistivity is generally 3 to 4 ohm meters, the preferred resistivity of the oil layer is 7 to 8 ohm meters, only