摘要
针对陕北斜坡中部AS油田沿河湾地区特低渗透储层识别主体骨架砂体微相带及筛选含油有利区工作，提出利用多种测井响应提取单渗砂层能量厚度信息，使其曲线形态、特征和数据大小能够集中反映相对高渗的单渗砂层最大沉积能量及厚度变化，确认出三角洲前缘水下分流河道微相及其河道叠置型河口坝微相骨架砂体的发育、规模及分布范围。通过该区长6特低渗透储层段自然电位、自然伽马、密度、中子、声波测井曲线和岩性、孔隙度及其能量厚度统计，建立起单渗砂层能量厚度下限标准，在该区长6目的层段储层中提取单渗砂层及其沉积能量信息，划分出有利沉积微相带及其骨架砂体分布，预测和筛选出不同类型相对高渗高产含油有利区。克服了单一测井参数不能准确表征特低渗透储层中单渗砂层能量厚度的问题，特别是有效避免了层段中几个成因相近薄砂层或砂泥互层中砂层累加厚度划分有利沉积微相带及其含油有利区，为该区特低渗透油田增储上产提供有利目标和重点层位及井区。
To identify main framework sandbody microfaeies belt and filter the favorable oil-bearing areas of extra-low permeability reservoir of Yanhewan area in AS oilfield in the middle of Shanbei Slope, the information of single permeability sand energy thickness is extracted from multiple log responses, the curve forms, characters and data sizes from which could reflect the highest sedimentary energy and thickness changes. The above information confirms the sand body development, scale and distribution range of distributary channel and overlying mouth bar sedimentary microfacies. We created the bottom criterion of single permeability sand energy thickness with the statistics of natural potential, combination gamma ray neutron laterolog, density, neutron and acoustic wave logging trace and lithology, porosity and energy thickness in chang6 ultra low permeability reservoir. The criterion is used to control favorable sedimentary microfacies belt and framework sand body distribution and forecast favorable oil-bearing areas which have relative high permeability and production. The problem is solved that single logging parameters couldn＇t accurately characterize single permeability sand energy thickness of extra-low permeability reservoir, and it availably avoids the fault of classifying favorable sedimentary microfacies belt of several thin sands and ble and important sand-shale interbeds which have close origins. The above results offer favoralayers and well blocks for enlarging reservoirs and raising yield in extra-low permeability reservoirs.
出处
《测井技术》
CAS
CSCD
北大核心
2011年第B12期652-656,共5页
Well Logging Technology
基金
中国石油天然气股份有限公司“十二五”科技攻关项目“致密气藏测井采集处理与储层评价技术研究”（编号：2010E-23）,国家自然科学基金项目“基于核向量机的油藏历史拟合代理模型研究”（编号：40872087）和西安石油大学全日制硕士研究生创新基金资助
关键词
测井资料
沉积环境
精细评价
沉积能量标准
单渗砂层优势微相带
log information, sedimentary environment, fine evaluation, depositional energy standard, favorable sedimentary microfacies belt
