哈浅101地区三叠系稠油油藏勘探成效分析

Exploration achievement of Triassic heavy oil reservoir in Haqian 101 area

针对乌夏断裂带哈山南缘南东倾斜坡地层超剥带构造特征及地层超剥关系复杂的情况,改进了地震采集和解释技术,得到了叠前时间偏移、叠前深度偏移时间域、深度域三套高精度三维地震数据.重建了工区中生界构造模式,地层呈底超顶剥特征,整体呈单倾斜坡,内部被次级断层切割,形成多个断块.建立了哈浅101地区三叠系成藏模式,油源断层沟通,垂向运移,毯内横向运移,在高部位聚集成藏.钻探的哈浅101井首次在该区钻遇到三叠系油层,埋深为202 ～258 m,厚度为52.1 m/3层,热采获得了工业油流,从而找到了1块相对优质的储量.建议在直井热采获工业油流基础上,试验水平井热采,提高单井产能.

Seismic acquisition and interpretation technology was improved for the complexity and characteristics of the overlap-denudation structure in the south-east slope in south Hala'alt,Wu-Xia fault zone,Junggar Basin,thereby acquired high resolution 3D seismic data,including pre-stack time migration,pre-stack depth migration time domain and depth domain. Mesozoic tectonic model was reconstructed for the study area,presenting as bottom overlap and top denudation,monocline slope on the whole,cut by secondary faults,and formed many fault blocks. A model of hydrocarbon accumulation was established for Triassic Haqian 101 area,in which oil source is communicated by faults,and oil accumulates in structural high. Haqian101 is the first well drilled into Triassic reservoir in this area. The reservoir depth is 202 ~ 258 m,the thickness is 52. 1m for 3 layers,and commercial oil flow is obtained by thermal recovery,thus discovered a high quality reserve. It is suggested that horizontal well thermal recovery be attempted to improve well productivity on the premise of commercial oil obtained by vertical well thermal recovery.