论文部分内容阅读
针对环江油田长7储层的典型致密油藏,常规的储层评价方法已不再适用,根据对油藏分布规律的分析,认为长7_1致密砂岩油藏主要受沉积砂体分布、储层物性、含油性的差异以及源储配置等因素控制。故提出从砂体结构、视储能系数、烃源岩评价等方面对储层进行综合评价的方法,将研究区长7_1砂岩储层划分为三种类型:Ⅰ类储集层分布在水下分流河道、砂质碎屑流沉积相带上,砂体结构为多期次叠置的厚层块状砂岩,视储能系数大于2.0,其烃源岩配置好;Ⅱ类储集层分布在砂质碎屑流浊积岩沉积相带上,砂体结构为厚层多夹层型,视储能系数分布在1.0~2.0,其烃源岩配置中等;Ⅲ类储集层分布在砂质碎屑流浊积岩沉积相带上,砂体结构为单期沉积型,薄砂、泥互层型,视储能系数小于1.0,其烃源岩配置差。该评价标准较好地满足了环江油田开发生产长7_1储层的实际需要。
For the typical tight reservoirs of Chang 7 reservoir in Huanjiang Oilfield, conventional reservoir evaluation methods are no longer applicable. According to the analysis of reservoir distribution, it is believed that Chang 7-1 tight sandstone reservoirs are mainly affected by the distribution of sedimentary sand bodies, Physical, oily differences and the source of storage configuration and other factors control. Therefore, a comprehensive evaluation method of reservoir from the aspects of sand body structure, apparent energy storage coefficient and hydrocarbon source rock evaluation is proposed. Three types of reservoirs are divided into three types: Class Ⅰ reservoirs are distributed under water Distributary channel and sandy debris flow sedimentary facies belt, the sand body structure is a multi-stage overlying massive thick sandstone with a reservoir energy factor greater than 2.0 and well-configured source rocks. Class II reservoirs are distributed over Sandy debris flow turbidite sedimentary facies belt, the sand body structure is a thick multi-sandwich type, depending on the energy storage coefficient of distribution in the 1.0 to 2.0, the source rock configuration is medium; Ⅲ type reservoir distribution in the sand broken On the sedimentary facies of the turbidite sedimentary facies, the sand body structure is single phase sedimentary type, thin sand and mud interbedded type, with apparent energy storage coefficient of less than 1.0 and poor source rock configuration. The evaluation standard meets the actual needs of Chang 7_1 reservoir in the development and production of the Huanjiang Oilfield well.