三塘湖油田牛东区块石炭系火山岩油藏储量参数研究

Study on Reserve Parameters of Carboniferous System Volcanic Reservoir in Block Niudong in Santanghu

三塘湖油田牛东区块石炭系卡拉岗组构造为一近东西走向的断鼻型圈闭,储层岩性主要为受风化淋滤作用改造后的玄武岩和安山岩,油藏主要控制因素为岩性、岩相,其次为地层和大型鼻状构造背景,油藏类型为构造——地层、岩性复合型。按照"成分+结构"岩石命名原则,确定岩心岩性,根据岩心与电测资料的对应关系,建立该区火山岩岩性识别图版和标准,进而划分储量计算单元,圈定含油面积,建立有效孔隙度、地层原始含油饱和度测井解释模型及有效层识别标准,多信息识别裂缝、计算裂缝孔隙度和含油饱和度,以油藏为研究单元研究流体参数等,为该油藏储量计算和开发方案编制奠定了坚实基础。

Carboniferous Kalagang formation structure in Block Niudong in Santanghu oilfield is almost east- west forward faulted - nose trap. Reservoir lithology is dominated by basalt and andesite changed by weathering and leaching, mainly dominated factors of the oil reservoir are lithology, lithofaeies, stratum and large nose - type structure setting, the type of reservoir is structure - formation and lithology compound. According to the rock＇ s naming principle of ＂composition and structure＂, core lithology is determined; according to the correlation of core and e- lectrle - log information, chart and criteria for the lithology identification of volcanic rock in this region are estab- lished, therefore reserve calculation units are classified; oil -bearing area are determined; log interpretation model about effective porosity and original oil saturation, identification eriteria of effective pay are build in order to identify fracture, calculate fracture porosity and oil saturation, and take reservoir being study unit to study fluid parameters, which established solid base for reservoir reserve calculation and development scheme design.