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文昌A油田珠二段I油组是该油田的主力油组,其生产现状表明隔夹层的类型、对地层水的封隔能力以及空间展布严重影响油藏的开发效果。岩芯观察、薄片鉴定及物性分析后认为,研究区珠二段I油组广泛存在着钙质、泥质和物性3类隔夹层,其中钙质隔夹层对开发的影响最大。由于井少,井网密度稀,取芯有限,仅从岩芯和测井上识别隔夹层不足以研究全区隔夹层的空间分布规律。在小层精细划分对比,沉积微相,测井精细解释研究的基础上,充分利用水平井水平段的信息,结合地球物理信息,通过井震结合,创新性地应用相控约束下的地震协同序贯高斯随机模拟方法建立隔夹层的模型预测隔夹层三维空间展布规律。预测结果与生产动态吻合,为油田增产和剩余油挖潜措施提供了有力的依据。
Wenchang A Oilfield Pearl II section I oil group is the main oil group in the field, the production status shows that the type of interlayer, the sealing capacity of formation water and space distribution seriously affect the development of the reservoir. The results of core observation, thin slice identification and physical property analysis suggest that there are 3 types of intercalated layers of calcareous, argillaceous and physical properties widely distributed in Zhu 2 Member I of the study area, of which calcareous intercalation has the greatest influence on development. Due to the small number of wells, the low density of well pattern and the limited coring, it is not enough to identify the intercalation layer only from the core and log to study the spatial distribution of the intercalation interlayer. On the basis of fine division and correlation of sedimentary microfacies, sedimentary microfacies and fine interpretation of well logging, we make full use of the information of the horizontal well, combined with geophysical information, through the combination of well and earthquake, and creatively apply the seismic synergy The sequential Gaussian random simulation method is used to establish the model of intercalation to predict the distribution of three-dimensional space in intercalation. The predicted results are consistent with the production dynamics, providing a strong basis for oilfield stimulation and remaining oil tapping measures.