准西车排子地区中生界油气成藏主控因素分析

发布时间：2018-04-25 23:26

本文选题：准噶尔盆地 + 车排子凸起　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：准噶尔盆地西缘车排子地区中生界勘探程度相对较低,油气来源及油气成藏过程的研究较为薄弱,油气成藏控制因素不明确。针对研究区存在的这些问题,以石油地质学、油气地球化学、沉积学和油气成藏理论为指导,利用野外露头、岩心、测录井、地震及分析化验资料等,采用成藏要素数理统计、地球化学分析测试等技术手段和方法,重点开展储层特征及油源分析研究,探讨车排子地区中生界油气成藏特征,查明研究区中生界油气成藏的控制因素,建立成藏模式,明确下步勘探方向与目标。通过钻井取心的岩心观察、粒度资料分析以及岩石薄片镜下观察等技术手段多手段、多角度对单井沉积相类型进行判别,系统厘定了沉积相带类型,建立了沉积相模式。利用分布函数曲线法对准西地区侏罗、白垩系有效储层物性下限进行了明确。白垩系储层埋深1000米以内,有效储层物性下限为14.3%,侏罗系为13.8%。储层岩性主要为长石岩屑砂岩和岩屑长石砂岩,储集空间类型主要为裂缝与溶蚀孔隙,综合评价为中孔中渗储层。油源对比确定车排子凸起东翼地区原油来自沙湾凹陷中二叠统下乌尔禾组湖相烃源岩,凸起中段原油属二叠系与侏罗系原油混合贡献区,凸起西翼原油来源于四棵树凹陷下侏罗统八道湾组湖相烃源岩。在成藏过程研究的基础上,根据油气富集特点,认为车排子地区中生界油气成藏主要受两个方面的控制:断毯的输导效能和储层砂体的储集性。断层、毯砂控制油气分布层位,砂体储集性控制含油气好坏。车排子凸起中生界油气成藏具有双源供烃,两期充注(J2—K、E-N)、浮力驱动、断层-毯砂输导为主、毯缘聚集成藏的特征,在成藏过程中,断层-砂体构成的输导体系起到至关重要的作用,控制油气的成藏及分布,砂体储集性控制油气的富集。以输导体系为核心,建立了准西车排子地区中生界远源供烃,断层-毯砂输导、砂体储集性主控成藏与富集油气成藏模式。
[Abstract]:The exploration degree of Mesozoic in the area of the west edge of the Junggar basin is relatively low, the source of oil and gas and the process of hydrocarbon accumulation are relatively weak, and the controlling factors for hydrocarbon accumulation are not clear. By measuring logging, seismic and analysis, using mathematical statistics, geochemical analysis and testing, the reservoir characteristics and oil source analysis are carried out. The reservoir characteristics of the Mesozoic oil and gas accumulation in the area of the PAI Zi area are discussed, and the control factors of the hydrocarbon accumulation in the Mesozoic in the study area are found out, and the reservoir forming model is established. Through the core observation of the drilling coring, the analysis of grain size data and the observation of the thin film under the microscope, the types of the single well sedimentary facies are judged by the multi angle. The sedimentary facies type is determined by the system, and the pattern of sedimentary facies is established. The method of distribution curve is used to aim at the Jurassic in the west area and the Cretaceous system. The lower limit of physical property of the reservoir is clear. The Cretaceous reservoir depth is less than 1000 meters, and the lower limit of the effective reservoir is 14.3%. The Jurassic 13.8%. reservoir lithology is mainly feldspar lithic sandstone and lithic feldspar sandstone. The reservoir space type is mainly fractured and dissolved pores, comprehensive evaluation is medium porosity and permeability reservoir. Oil source comparison determines car platoon convex. The crude oil from the east wing area is derived from the lake facies source rock in the lower two strata of the lower middle strata of the Shawan sag, the middle section of the crude oil belongs to the mixed contribution area of the Permian and Jurassic crude oil, and the West Wing crude oil comes from the lake facies source rocks of the lower Jurassic eight Dao Wan formation in the four tree sag. The Mesozoic hydrocarbon accumulation in the subregion is mainly controlled by two aspects: the transmission efficiency of the broken blanket and the reservoir of the reservoir. The fault, the blanket sand controls the oil and gas distribution, the sand body is used to control the oil and gas. The Mesozoic oil and gas accumulation in the car platoon convex has two sources of hydrocarbon supply, the two phases of filling (J2 - K, E-N), buoyancy drive and fault blanket sand transport In the process of reservoir formation, the fault sand body transport system plays a vital role in controlling the accumulation and distribution of oil and gas, and the accumulation of sand body controls the accumulation of oil and gas in the process of reservoir formation. The reservoir and accumulation model of oil and gas accumulation are controlled.

【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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