基于标准测井的克拉玛依油田一区克下组储层精细解释研究

Fine Reservoir Interpretation of Karamay Oilfield in District 1 Based on Type Logs

标准测井系列能够反映油藏的岩性信息和储层特征,也是研究剩余油分布规律的重要资料。针对克拉玛依油田一区三叠统克拉玛依组下亚组(简称"克下组",T2k1)的标准测井曲线,依据密闭取心井的岩性资料提取出砾岩油藏的岩性敏感参数,确定了基于0.25m电位电阻率(ρU(0.25m))和标准自然电位(Usp)的岩性识别图版,在此基础上利用岩心分析数据和测井曲线的对应关系分岩性建立了储层物性和含油性的解释模型,并且结合试油和产液剖面资料确定了T2k1不同岩性有效储层和油层的识别标准。建立的模型和标准应用于实际油藏的单井精细解释中,岩性的识别准确率达到85%以上,孔隙度的解释误差小于5%,渗透率的解释误差小于30%,含水饱和度的解释误差小于10%,油层的划分结果与试油结论基本相符,达到了实际测井解释的要求,为油藏的数值模拟和剩余油的评价提供了技术支撑。

The type logs could reflect lithological information and characteristics of hydrocarbon reservoir,and was also the important data of studying remaining oil distribution.In allusion to the characters of type log curves in Kexia Formation of Triassic in District 1of Karamay Oilfield,the lithological sensitivity parameters of conglomerate reservoir were collected according to lithological data of sealing core wells,the lithological identification chart-board was established based on two parameters such as potential resistivity R025and normal natural potential BZSP.On the basis stated,the interpretation models of reservoir property and oil-bearing of different lithologies are established by using corresponding relationships between core analysis data and well log curves,moreover,the identification criteria of effective reservoir and oil layer of different lithologies in Kexia Formation are determined in the light of well testing and liquid production profile data.The established models and criteria are applied for fine interpretation of single well in actual reservoirs,the accuracy of lithological identification is more than 85%and the interpretation error of effective porosity is less than 5%,permeability error is less than 30%and water saturation error is less than 10%,the identification result is consistent with that of well testing.The application results are satisfied with the requirements of well log interpretation,it provides technical support for reservoir numerical simulation and remaining oil evaluation.