摘要
开发实践证明,厚油层内部隔夹层的分布规律是影响油田开发中后期单砂体注采关系及剩余油分布的主控因素。柴达木盆地昆北油田A区下干柴沟组下段油藏发育厚油层,厚油层内部泥质隔夹层发育,在岩芯标定测井的基础上,建立了泥质隔夹层识别模式,并以此模式为标准开展了全区隔夹层的识别及分布规律研究,根据隔夹层的纵向分布、平面展布特征将区内隔夹层分为稳定型隔夹层、次稳定型隔夹层和不稳定型隔夹层等3种类型。水动力条件及基准面旋回是控制隔夹层厚度变化及分布规模的主要因素。在分析3种隔夹层分布规律的基础上,以泥质含量参数下限值为约束条件利用随机建模方法预测了井间隔夹层的空间分布,建立了研究区隔夹层的三维展布模型,为油藏注采关系调整、提高水驱储量动用程度提供了地质依据。
In the middle and late stage of oilfield development, the distribution of the interlayer within thick reservoir is the main factor affecting the injection-production relation of single sand body and the remaining oil distribution. The lower segment of Xiaganchaigou formation （E13） develops thick reservoir in the Q6 Block of Kunbei oilfield, Qaidam basin, and the thick oil reservoir develops muddy interlayer. In this paper, an identification model of Muddy interlayer was set up by core calibration logging, and this model is taken as a standard to carry out the identification of the interlayer in the entire area. According to the profiles, plane distribution characteristics of the interlayer, the interlayer in the study area is divided into the stable, sub-stable and unstable types. On the analysis of distribution law of 3 kinds of interlayer, the shale content parameter lower limit value is taken as constraint condition, and stochastic modeling is used to predict the space distribution of the interlayer, 3D distribution model of the interlayer is establishedto improve geological basis for injection-production relationship adjustment and water drive reserves producing degree of the reservoir.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第4期67-72,共6页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
中国石油天然气股份公司科技重大专项(2011E-0308)
关键词
厚油层
隔夹层
识别模式
随机建模
昆北油田
柴达木盆地
thick reservoir
interlayer
identification model
stochastic modeling
Kunbei Oilfield
Qaidam Basin
