塔河油田西部深层微幅构造综合评价

塔河油田西部古近系库姆格列木群发育了一系列受北东—南西向雁行式断裂带牵引所形成的微幅构造圈闭群。通过油气运聚方向综合分析与多属性识别流体性质相结合评价圈闭的含油气性,利用地质力学模型分析等定性化圈闭识别手段与地震时间切片、相干体分析技术以及变速构造成图等定量化圈闭解释技术相结合评价圈闭的落实程度,形成了一套针对微幅构造的综合评价技术,有效指导了研究区油藏的滚动评价工作。研究结果表明,该区古近系库姆格列木群油藏的油气具有＂垂向调整、侧向运移、断裂控藏＂的特点,微幅构造圈闭的闭合幅度与断裂的发育规模呈正相关关系,弧长属性异常可作为判别圈闭内富集流体性质的参考依据。

Comprehensive evaluation of tiny amplitude structure in deep formation in western Tahe Oilfield

A series of tiny amplitude structure attracted by the en echelon fault blocks ranged NW-SE is developed in Kumugeliemu group in western Tahe Oilfield. This paper evaluated the hydrocarbon-bearing quality of traps through the multidisciplinary analysis of hydrocarbon migration and accumulation direction and identifying fluid properties by seismic multi-attributes analysis, evaluated the implementation degree of traps by qualitative trap identification techniques such as geomechanical model and by the quantitative trap interpretation techniques such as seismic time slice, coherency analysis technique and variable velocity mapping. Based on these, a series of comprehensive evaluation technique of tiny amplitude structure was formed to guide the rolling evaluation effectively. The research results show that the oil and gas of Kumugeliemu group reservoirs has the characteristics of ＂vertical adjustment, lateral migration and reservoir controlled by the fault＂. There is a positive correlation between the closed amplitude of tiny structural traps and the development scale of fault. The abnormal are length attribute can be reference to discriminate the fluid properties accumulated in the traps.