渤海A油田边底水稠油油藏隔夹层研究及应用

Study and application of interlayers in heavy oil reservoirs with edge and bottom water in Bohai A oilfield

应用基于测井响应分析的井点隔夹层识别和基于地震属性分析的平面井间隔夹层描述技术,对渤海A油田明化镇组边底水稠油油藏含油层段开展沉积特征及隔夹层研究,结果表明,该区隔夹层有4种类型,可划分为强遮挡、中遮挡、弱遮挡三种级别;结合数值模拟方法,提出了油井间次生底水油藏储层顶部区、夹层下部未动用区、过渡带夹层局部纯油区三种剩余油分布样式;同时结合实际井动态资料进一步验证了隔夹层认识的可靠性,为深入挖潜研究区剩余油提供了依据。

The interlayer identification technique of well points based on logging response analysis and the description technique of interlayers between wells based on seismic attribute analysis, the study on sedimentary characteristics and the interlayers of the oil-bearing strata from Minghuazhen formation in heavy oil reservoirs with edge and bot-tom water in Bohai oilfield A oilfield was carried out. The results show that there are 4 types of interlayers in this area, which can be divided into strong occlusion,medium occlusion and weak occlusion. Combined with the numerical simulation method, three types of remaining oil distribution patterns are proposed, including the top area of the secondary bottom water reservoir between oil wells, the unexploited area under the interlayer and the local pure oil area in the interlayer of transition zone. Meantime, the reliability of the interlayer recognition is further verified by combining with the actual well dynamic data, which provides a basis for further exploring the remaining oil in the study area.