郑庄油区吴旗区域长6储层描述及油藏评价

发布时间：2018-11-13 08:03

【摘要】：郑庄油区吴旗区域油藏埋深较浅,主要开采层位为长6油层组,地层能量较低,油井产量较低,对油藏地质特征和开发特征的认识不够精细,储层描述和油藏评价还有待进一步提高。为了认清油藏的地质特征,本文首先从油藏的地层特征出发,确定长6油层组的划分界限,研究储层的沉积背景和砂体展布特征,认清油藏的岩石学特征,进而确定油藏的类型,分析油藏的孔隙流体和压力温度特征,确定油藏的非均质程度。对岩心资料的实验结果进行分析,建立孔隙度解释模型,采用不同方法计算得到本区油藏的含油饱和度,建立渗透率与孔隙度的回归公式求解油藏的渗透率值,进一步确定油藏的孔渗下限值,计算长6油层组的储量,对试油试采特征进行研究发现油井几乎没有自然产能,地层能量明显不足。对油藏进行开发效果评价,发现为了提高产量需要补充地层能量,对补充地层能力开发的必要性进行论证,证实了注水开发的可行性,并对储层的注水开发采收率进行预测,在此基础上,进一步进行开发层系划分,计算井网密度,确定合理的井网井距,对长6油层的单井产能和注水量进行研究,最终确定油藏的合理注采比。
[Abstract]:The reservoir depth in Wuqi area of Zhengzhuang oil area is shallow, the main production horizon is Chang 6 oil formation, the formation energy is low, the oil well production is low, and the understanding of reservoir geological characteristics and development characteristics is not precise enough. Reservoir description and reservoir evaluation need to be further improved. In order to recognize the geological characteristics of the reservoir, this paper first determines the division boundary of the Chang 6 reservoir group, studies the sedimentary background and the distribution characteristics of the sand body, and recognizes the petrological characteristics of the reservoir, starting from the stratigraphic characteristics of the reservoir. Then the type of reservoir is determined, the pore fluid and pressure temperature characteristics of reservoir are analyzed, and the heterogeneity degree of reservoir is determined. The experimental results of the core data are analyzed, the porosity interpretation model is established, the oil saturation of the reservoir in this area is calculated by different methods, and the regression formula of permeability and porosity is established to solve the permeability value of the reservoir. Further determine the reservoir porosity and permeability limit, calculate the reserves of Chang 6 reservoir group, and study the characteristics of oil test production test. It is found that the oil well has almost no natural productivity, and the formation energy is obviously insufficient. The evaluation of reservoir development effect shows that in order to increase the production rate, the formation energy needs to be replenished, the necessity of replenishing formation capacity development is demonstrated, the feasibility of water injection development is confirmed, and the oil recovery factor of reservoir water injection development is predicted. On this basis, further division of development layers, calculation of well pattern density, determination of reasonable well spacing, study of single well productivity and water injection rate of Chang 6 oil formation are carried out to determine the reasonable injection-production ratio of the reservoir.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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