吉林大老爷府地区高台子油层地质特征研究

发布时间：2018-08-09 15:41

【摘要】：经多年钻井开发及井网加密,吉林大老爷庙油田的储层发育较好的主体区块都已先后投入生产,复杂性与难点逐步加深,在老油田内寻找新的有利区也越来越难,故为了弄清吉林大老爷府地区的石油天然气地质储量及技术可采储量,进一步制定详细开发方案,提高开采效率,对研究区开展了油藏地质特点的研究工作。吉林大老爷府地区,上至下共发育有三套含油气层系:葡萄花油气层(姚家组一段)、高台子油气层(青山口组一段)、扶余油气层(泉头组四段)。其中高台子油气层是油田开发产能建设重点含油层位之一,具有较大的扩边建产潜力,为了进一步研究,特开展此次工作,文章充分利用前人研究成果和认识,结合三维地震资料,运用层序地层学,沉积学、石油地质学以及构造学等多学科相关理论,通过综合分析吉林大老爷府地区的地震、测井、岩心资料的,完成了大老爷府地区高台子油层的地质特征研究工作。论文结合工区已有资料,条理分明的对工区地质特征逐级分布进行研究。首先,以松辽盆地构造演化特征为背景,开展了构造与断裂特征的研究,根据油层组岩性、岩相变化的旋回性及其反映在电测曲线形态上的组合特征,总结区域沉积地层演变规律将目的层段划分为1个长期旋回,4个中期基准面旋回,11个短期基准旋回。以合成记录为桥梁,对层位精细标定,完成GI、GII、GIII、GIV四个砂组及各砂组11个小层的构造解释。利用时深关系建立适合的三维速度场,并成取构造图件,并在构造图和地震资料的基础上,对研究区目的层段分析构造特征,断裂特征。研究区目的层段构造演化遵循松辽盆地构造演化背景,盆地经历了四个阶段的演化历程,形成了独具特色的沉积地层及层序格架。在构造上,整体形态是一背斜构造,继承性良好,圈闭条件有利。断层主要分布在边缘地区,穹窿内部不发育。其次,结合研究区沉积环境背景建立单井、联井相模式,结合属性特征,绘制沉积相图,研究沉积地质特征。高台子油层各砂组砂岩分布稳定。分析沉积特征属于三角洲沉积相。再次,利用岩心钻井资料,结合砂体展布情况,分析总结高台子油层储层物性特点,砂体连通性好,叠加连片,中低孔渗。最后,结合生储盖组合与成藏模式及油水分布规律等,开展成藏规律研究,建立研究区地区油气成藏模式,分析油藏类型,优选有利勘探目标。文章深入的研究了高台子油层的地质特征,分析了油层动态,精确的预测有利区带。更拓宽了研究思路,对加快吉林地区油气勘探工作的步伐有着积极的促进作用,此外,还可以为老油区的井网加密调整和更深一步油藏评价提供技术支持。
[Abstract]:After many years of drilling and development and well pattern infilling, the main blocks with good reservoir development have been put into production successively, and the complexity and difficulties have gradually deepened, and it is becoming more and more difficult to find new favorable areas in the old oil fields. Therefore, in order to make clear the petroleum and natural gas geological reserves and the technically recoverable reserves in the Dalaoyefu area of Jilin Province, to further formulate the detailed development plan and improve the production efficiency, the research work on the reservoir geological characteristics has been carried out in the study area. There are three sets of oil-bearing gas reservoirs: Putaohua oil and gas reservoir (first member of Yaojia formation), Gaotaizi oil and gas reservoir (one member of Qingshankou formation) and Fuyu oil and gas reservoir (fourth member of Quantou formation) in the Da'laoyefu area of Jilin Province. Among them, Gaotaizi oil and gas reservoir is one of the key oil-bearing layers in the development and productivity construction of oil field, and it has great potential to expand the edge to build production. In order to further study, this paper makes full use of the previous research results and understanding. Combining with 3D seismic data and using the relevant theories of sequence stratigraphy, sedimentology, petroleum geology and tectonics, through comprehensive analysis of seismic, logging, and core data in the Dalaoyefu area of Jilin Province, The geological characteristics of the Gaotaizi reservoir in the Dariyiefu area have been studied. Based on the existing data, this paper studies the distribution of geological features in the area. First of all, based on the tectonic evolution characteristics of Songliao Basin, the structural and fault characteristics are studied. According to the lithology, the cyclicity of lithofacies change and the combination characteristics reflected in the shape of the electric survey curve, the structure and fault characteristics are studied. According to the evolution of regional sedimentary strata, the target interval is divided into one long-term cycle, four medium-term base-level cycles and 11 short-term datum cycles. With the composite records as a bridge, the fine calibration of the layers is carried out, and the tectonic interpretation of the four sand formations and the 11 sub-layers of each sand formation are completed. A suitable 3-D velocity field is established by using time-depth relationship and structural maps are obtained. On the basis of structural maps and seismic data, structural characteristics and fault characteristics of the target zone in the study area are analyzed. The tectonic evolution of the target formation in the study area follows the tectonic evolution background of Songliao Basin. The basin has undergone four stages of evolution and formed a unique sedimentary stratigraphy and sequence framework. The whole structure is an anticline structure with good inheritance and favorable trap conditions. The fault is mainly distributed in the marginal area and is not developed within the fornix. Secondly, combined with the background of sedimentary environment in the study area, the single well and the combined well facies model were established, and the sedimentary facies diagram was drawn in combination with the attribute characteristics to study the sedimentary geological characteristics. The sandstone distribution of each sand formation in Gaotaizi reservoir is stable. The sedimentary characteristics belong to delta sedimentary facies. Thirdly, based on the core drilling data and the distribution of sand body, the physical characteristics of the reservoir in Gaotaizi reservoir are analyzed and summarized. Finally, based on the combination of source, reservoir and caprock assemblage and oil / water distribution, the study of reservoir formation law is carried out, the oil and gas accumulation model in the study area is established, the reservoir type is analyzed, and favorable exploration targets are selected. In this paper, the geological characteristics of Gaotaizi reservoir are deeply studied, and the reservoir dynamics are analyzed, and the favorable zones are accurately predicted. It can also provide technical support for well pattern infilling adjustment and further reservoir evaluation in old oil area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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