溱潼凹陷西部斜坡戴南组地层油气藏地震解释技术研究

发布时间：2018-04-27 04:36

本文选题：溱潼凹陷 + 地层油气藏　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：苏北盆地溱潼凹陷是一个勘探程度相对较高的盆地,过去主要是针对构造圈闭进行勘探。随着油气勘探程度不断深入,构造类型圈闭识别难度越来越大,岩性地层油气藏勘探成为当前勘探开发工作的热点[1]。地层油气藏勘探在溱潼凹陷刚刚起步,为了更好地开展该类油气藏的勘探,需要形成一套适合于苏北盆地复杂小断块地区地震资料解释技术。本文通过研究近几年地层油气藏勘探地震解释工作成果,初步总结了一套适用于苏北盆地溱潼凹陷戴南组地层油气藏勘探的地震解释技术。对于适用于构造解释的地震资料,在解释性处理中通过感兴趣有效频率识别、拓频、谱平衡等技术的应用,突出感兴趣频带的振幅谱,可以提高数据的分辨率,有效地改善资料质量。在地层圈闭精细描述中通过相干分析、瞬时相位及频谱分解等技术的应用有利于地层超剥线的识别。针对地震同相轴识别的尖灭点与实际地层超剥尖灭点之间的误差,通过建立夹角外推量板,可以更加准确识别实际地层超剥尖灭位置。地震反演工作前通过测井曲线归一化、标准化等预处理和利用拟合声波有利于提高地震反演精度,同时,明确了在井资料比较丰富的地区,利用基于地质统计学的随机反演有利于提高砂体预测的精度。通过地震属性的分析,识别了戴一段地层油气藏勘探中对储集层的敏感度相对较高的地震属性,确定了利用“亮点”技术和高频衰减梯度属性可以进行含油气性检测。通过多种地震解释技术的运用,在苏北盆地溱潼凹陷戴一段地层油气藏勘探中取得了较好的油气勘探成果。在溱潼西部斜坡陈家舍、帅北和白马地区实现了戴南组超覆尖灭带类型的油藏突破,新落实含油面积2.16km~2,落实优质商业储量235×10~4t,累建产能3.9×10~4t。
[Abstract]:Qintong sag in Subei basin is a basin with relatively high exploration degree, which was mainly aimed at structural traps in the past. With the deepening of oil and gas exploration, it is more and more difficult to identify the traps of structural types, and the exploration of lithostratigraphic oil and gas reservoirs has become a hot spot in the current exploration and development work [1]. Reservoir exploration in Qintong sag is just beginning. In order to better carry out the exploration of this kind of oil and gas reservoirs, a set of seismic data interpretation techniques suitable for complex small fault blocks in Subei Basin should be formed. Based on the study of seismic interpretation of stratigraphic oil and gas reservoir exploration in recent years, a set of seismic interpretation techniques suitable for exploration of formation oil and gas reservoirs in Qintong sag of Qintong depression in northern Jiangsu Basin are preliminarily summarized in this paper. For seismic data suitable for structural interpretation, the amplitude spectrum of the band of interest can be highlighted by the application of the techniques of effective frequency identification, frequency extension and spectral balance in the interpretation processing, which can improve the resolution of the data. Effectively improve the quality of data. The application of coherent analysis, instantaneous phase and spectrum decomposition in the fine description of stratigraphic traps is beneficial to the recognition of strata overstripping lines. In view of the error between the pinning-out point identified by the cophase axis of the earthquake and the overstripping extinguishing point of the actual stratum, the location of the overpeeling and extinguishing of the actual stratum can be more accurately identified by establishing the angle extrapolation plate. Before seismic inversion work, preprocessing and using fitting sound wave, such as normalization of logging curve, standardization and so on, are helpful to improve the precision of seismic inversion. At the same time, it is clear that the area with abundant well data is clear. Stochastic inversion based on geostatistics is helpful to improve the accuracy of sand body prediction. Based on the analysis of seismic attributes, the seismic attributes with relatively high sensitivity to reservoir in the exploration of formation oil and gas reservoirs in Dayi formation are identified, and the oil-bearing gas properties can be detected by using "bright spot" technique and high-frequency attenuation gradient attribute. Through the application of many seismic interpretation techniques, good oil and gas exploration results have been obtained in the exploration of formation reservoirs in Qintong Sag, Qintong Sag, North Jiangsu Basin. In Chenjiashe, Shuaibei and Baima area of Qintong western slope, the reservoir breakthrough of the type of overlying tip-out zone in Dainan formation has been realized, the oil area of 2.16kmm2 has been newly implemented, the commercial reserves of high quality have been realized 235 脳 10104t, and the cumulative production capacity 3.9 脳 104t has been realized.
【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;P631.4

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