塔河油田九区三叠系油气藏隔夹层识别及其展布研究

 隔夹层的分布特征是厚油层层内非均质性的主要控制因素。针对塔河油田九区三叠系油气藏阿克库勒组阿1段厚层三角洲分流河道砂体，综合岩心、测井资料，将其内部隔夹层划分为泥质和钙质两类，建立两类隔夹层定量划分标准。根据研究区的沉积环境确定了隔夹层的分布特征，综合水平井资料和局部密井网区隔夹层对比结果确定其平面展布范围。优选示性点模拟方法对隔夹层的展布进行随机模拟，再根据隔夹层分布特征修正随机模拟结果，最终人机交互建立确定性的隔夹层三维地质模型。隔夹层研究成果为油藏开发方案编制和调整提供了地质依据。

Identification and Distribution of Intercalated Strata in the Triassic Petroleum Reservoir of the 9th Area, Tahe Oilfield

The distribution of stratigraphic intercalations is a major controlling factor that accounts for heterogeneity in many thick, oil-prone sedimentary layers. Using as an example the Triassic reservoir of the A I member of Akekule Formation in Block 9 of the Tahe Oilfield, which comprises a thick layer of delta distributary channel sand bodies, and combined with core and well log data, the stratal intercalations can be quantitatively classified into two types of clay and carbonate. On this basis, quantitative criteria for the classification of the two types of intercalations are established. Based on the sedimentary environment of the study area, horizontal well data and correlation of interbedded strata in the local dense drilling zone, the pattern and extent of the intercalations are determined. Marked point process simulation is the preferred method to determine the distribution of intercalations during random simulation, and subsequently the random simulation results are modified by data spread. Consequently the three-dimensional certainty geological model of the intercalations is established by human-computer interaction. Intercalations research results provide a geological basis for petroleum reservoir development planning and management.