论文部分内容阅读
本世纪二十年代以来,南Casper Creek油田(位于怀俄明州Natrona县)风成海相沉积的Tensleep砂岩一直生产低比重的原油。直到最近,仍认为该储层是相对均匀的砂岩体,并以此对始于七十年代末,八十年代初的二次开采工作进行了模拟。由于二次开采性能较差,从而对储层进行重新评估。油田开采者,加利福尼亚联合石油公司(UNOCAL)的特征研究组,以及科罗拉多矿业学院的储层描述项目组对Tensleep储层图进行了彻底的修改。他们对有意义的地层、成岩作用和构造的不均匀性进行了识别和成图,并与先导性蒸汽驱程序下的生产率图作了相关分析。这种把地质和地球物理综合起来得到的结果是很有意义的,它关系到Tensleep层及其区域相关层系的二次开采。
Since the 1920s, the Tensleep sandstones of the South Casper Creek oilfield (located in Natrona County, Wyoming) have been producing marine sediments with low specific gravity. Until recently, the reservoir was still considered as a relatively homogeneous sandstone body and was used to simulate secondary mining that began in the late 1970s and early 1980s. Reservoirs are reevaluated due to poor secondary recovery. The Tensleep reservoir map was completely modified by the oilfield miners, the UNOCAL’s Feature Study Group, and the Colorado School of Mines Reservoir Description Program. They identified and mapped the significance of stratigraphy, diagenesis and structural inhomogeneities and correlated them with the productivity map under the pilot steam flooding program. This combination of geophysical and geophysical results makes sense and relates to the secondary recovery of the Tensleep layer and its associated strata.