欢喜岭下台阶非常规油气藏勘探潜力评价

发布时间：2018-09-18 13:23

【摘要】：欢喜岭油田下台阶欢95块沙四段是油田相对开发程度较低的区块之一,该区域沙四段埋藏深,储层物性差。在勘探开发初期部分探井仅仅试油后就上返至上层系开发,大部分探井和开发井甚至未钻遇或钻穿该层位,甚至可以说基本没有认识。因此亟需弄清其地质特征及其勘探潜力,满足开发调整需求。本论文以欢喜岭下台阶欢95区块为研究区域,以地震资料与测井资料为基础,以查明沙四段地质特征及勘探开发潜力为目的,重点开展了精细构造解释、沉积微相研究与勘探潜力评价,并完成部署井位建议。主要细分为:(1)建立下台阶沙河街组四段地层等时地层构架,对沙河街组四段地层进行重新划分对比。在利用岩芯观察和测井资料综合解释的基础上,建立精细等时地层格架。(2)利用高分辨率三维地震资料,结合重新划分和精确标定的层位,对沙河街组四段以及太古界潜山进行构造解释。(3)对沙四段地层进行沉积微相研究,进行沙四段物源分析.利用地震、岩心资料进行沉积充填研究,并从大相出发进行微相研究。(4)通过地震属性与地震相研究,完成沙四段非常规储层发育段的预测与分析,最终确定有利区带,提出有优势井位部署建议。研究表明,研究区沙四段东南方向沉积厚度最大,其中杜I比杜II整体更厚。从波组特征上来看,Tex、Tes与Tg三个反射层整体上能量都较强,在全区范围内连续性与范围性都比较好,三层都主要显示为两到三个相位。研究区构造整体上具有继承性,凹陷内的主干断层以拉张运动为主,整体构造从东北向西南方向呈单斜形态,主要发育以一系列北东向、北北东向的正断层。研究区整体物源方向来自于来自于由西北自东南方向的西八千物源。研究区特殊岩性段烃源岩有机质丰度相对较好,TOC值普遍超过了1.5%。结合上述研究结果,在进行有利区叠合图的基础上最终完成了三口井的井位部署建议,为后续勘探开发提供了有利的研究思路。
[Abstract]:The fourth member of Huan95 block in the lower steps of Huanxiling Oilfield is one of the relatively low development blocks in the oilfield. The fourth member of the formation is buried deep and the reservoir physical property is poor. In the early stage of exploration and development, part of the exploration wells are developed back to the upper layer only after testing, and most of the exploration wells and development wells have not even been drilled or drilled through this layer, which can even be said to be basically unknown. Therefore, it is urgent to clarify its geological characteristics and its exploration potential to meet the needs of development adjustment. Based on seismic data and logging data, the paper takes Huan95 block of lower steps of Huanxiling as the research area, and focuses on fine structural interpretation for the purpose of ascertaining geological characteristics and exploration and development potential of the fourth member of Shahejie formation. Sedimentary microfacies research and exploration potential evaluation, and completion of the deployment of well site recommendations. The main subdivisions are as follows: (1) the isochronous stratigraphic framework of the fourth member of the Shahejie formation is established, and the fourth member of the Shahejie formation is reclassified and correlated. On the basis of core observation and comprehensive interpretation of logging data, a fine isochronous stratigraphic framework is established. (2) using high-resolution 3-D seismic data, combined with the re-division and accurate calibration of the horizon, The fourth member of Shahejie formation and Archaean buried hill are interpreted. (3) the sedimentary microfacies of the fourth member of Shahejie formation are studied and the provenance analysis of the fourth member of Shahejie formation is carried out. Using seismic and core data to study sedimentary filling and microfacies from large facies. (4) through seismic attribute and seismic facies study, the prediction and analysis of the unconventional reservoir development section in the fourth member of Shahejie formation are completed, and the favorable zone is finally determined. The suggestion of well location deployment is put forward. The results show that the thickness of sediment is the largest in the southeast direction of the fourth member of Sha, in which du I is thicker than du II as a whole. According to the characteristics of the wave group, the energy of the three reflectors of Tes and Tg is relatively strong, and the continuity and range are better in the whole region, and the three layers are mainly displayed as two to three phases. The main faults in the sag are extensional movement, the whole structure is monoclinic from northeast to southwest, and there are a series of normal faults in NNE and NNE direction. The whole provenance direction of the study area comes from the western 8,000 provenances from northwest to southeast. The organic matter abundance of the source rocks in the special lithologic member of the study area is relatively good and the TOC value is generally higher than 1.5. Based on the above research results, the well location deployment proposal of three wells is finally completed on the basis of the stacking map of favorable areas, which provides a favorable research idea for further exploration and development.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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