高精度随机反演方法研究及其在SLG气田应用
发布时间：2018-10-13 18:32
【摘要】：中国陆上岩性油气藏探明储量从20世纪90年代初占总探明储量的20%逐步上升到目前的55%左右,显示出岩性油气藏在油气开发中的重要地位。精细勘探将是影响油气增储上产的关键因素之一,而对于精细油气勘探来说,高精度地震反演成果在油藏描述及油气储层预测等研究工作中发挥着越来越重要的作用,因为其反演结果能较真实地反映出地下的地质构造和储层的岩性特征,可以大大提高钻井的成功率。SLG气田是中国陆地上发现的一个特大型气田之一,属于隐蔽性砂岩气藏。其储层具有气层单层有效厚度薄、砂体横向连续性较差,空间变化大、单层平面分布不稳定,并且非均质性较强、砂体沉积类型复杂等特点。为了对SLG地区隐蔽性砂岩气藏的薄互层储层进行精细分析研究,本文从常规确定性叠后反演方法到精细的高精度随机反演方法进行了系统的分析,对反演过程中的关键技术和参数进行了详细的研究,并在此基础之上以研究区内目的层段H8段为目标,在高精度反演结果上对砂体展布进行分析。取得了以下研究成果:1、在常规叠后反演的优缺点分析与研究基础上,通过对常规随机方法的优化和改进提出了一种高精度随机反演方法,并对SLG气田的地层划分、沉积特征、储层特征进行了全面的分析与总结,结合其特点建立了一套适合于SLG气田的反演流程;2、通过对叠后地震反演影响因素的研究和试验,确定了影响反演结果的关键参数,并对其精细分析,以保证反演的精确性;3、通过比较常规随机反演方法与高精度随机反演方法的反演结果,认为高精度随机反演结果在SLG气田有更好的效果;4、在高精度反演结果的基础上,结合地质认识,对SLG地区砂体分布特征进行了综合分析,并通过单井砂体误差分析进一步对高精度随机反演结果可靠性进行验证。综上所述,高精度随机反演在SLG气田取得了不错的应用效果,提高储层预测精度,具有重要的实际应用价值。
[Abstract]:The proven reserves of onshore lithologic reservoirs in China have gradually increased from 20% of the total proven reserves in the early 1990s to about 55% at present, indicating the important position of lithologic reservoirs in oil and gas development. Fine exploration will be one of the key factors affecting the increase of oil and gas reservoir production. For fine oil and gas exploration, high-precision seismic inversion results play a more and more important role in reservoir description and oil and gas reservoir prediction. Because the inversion results can reflect the underground geological structure and lithologic characteristics of the reservoir, it can greatly improve the success rate of drilling. SLG gas field is one of the super large gas fields discovered on land in China, which belongs to the concealed sandstone gas reservoir. The reservoir is characterized by thin effective single layer thickness of gas reservoir, poor horizontal continuity of sand body, large spatial variation, unstable plane distribution of single layer, strong heterogeneity and complex sedimentary types of sand body. In order to analyze and study the thin interbed reservoir of concealed sandstone gas reservoir in SLG area, this paper makes a systematic analysis from the conventional deterministic poststack inversion method to the fine high-precision random inversion method. The key techniques and parameters in the inversion process are studied in detail. On the basis of this, the distribution of sand bodies is analyzed on the basis of the H8 section of the target layer in the study area. The results are as follows: 1. On the basis of the analysis and research of the advantages and disadvantages of conventional poststack inversion, a high-precision stochastic inversion method is proposed by optimizing and improving the conventional stochastic method, and the stratigraphic division and sedimentary characteristics of SLG gas field are also discussed. The reservoir characteristics are comprehensively analyzed and summarized, and a set of inversion processes suitable for SLG gas field are established according to their characteristics. 2. By studying and testing the influencing factors of post-stack seismic inversion, the key parameters affecting the inversion results are determined. In order to ensure the accuracy of the inversion, the inversion results of the conventional stochastic inversion method and the high-precision stochastic inversion method are compared. The results of high precision random inversion are considered to be more effective in SLG gas field. (4) on the basis of high precision inversion results, combined with geological understanding, the distribution characteristics of sand bodies in SLG area are comprehensively analyzed. The reliability of high precision random inversion results is further verified by single well sand body error analysis. To sum up, high precision random inversion has achieved good application effect in SLG gas field and improved reservoir prediction accuracy, which has important practical application value.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4
本文编号：2269550
[Abstract]:The proven reserves of onshore lithologic reservoirs in China have gradually increased from 20% of the total proven reserves in the early 1990s to about 55% at present, indicating the important position of lithologic reservoirs in oil and gas development. Fine exploration will be one of the key factors affecting the increase of oil and gas reservoir production. For fine oil and gas exploration, high-precision seismic inversion results play a more and more important role in reservoir description and oil and gas reservoir prediction. Because the inversion results can reflect the underground geological structure and lithologic characteristics of the reservoir, it can greatly improve the success rate of drilling. SLG gas field is one of the super large gas fields discovered on land in China, which belongs to the concealed sandstone gas reservoir. The reservoir is characterized by thin effective single layer thickness of gas reservoir, poor horizontal continuity of sand body, large spatial variation, unstable plane distribution of single layer, strong heterogeneity and complex sedimentary types of sand body. In order to analyze and study the thin interbed reservoir of concealed sandstone gas reservoir in SLG area, this paper makes a systematic analysis from the conventional deterministic poststack inversion method to the fine high-precision random inversion method. The key techniques and parameters in the inversion process are studied in detail. On the basis of this, the distribution of sand bodies is analyzed on the basis of the H8 section of the target layer in the study area. The results are as follows: 1. On the basis of the analysis and research of the advantages and disadvantages of conventional poststack inversion, a high-precision stochastic inversion method is proposed by optimizing and improving the conventional stochastic method, and the stratigraphic division and sedimentary characteristics of SLG gas field are also discussed. The reservoir characteristics are comprehensively analyzed and summarized, and a set of inversion processes suitable for SLG gas field are established according to their characteristics. 2. By studying and testing the influencing factors of post-stack seismic inversion, the key parameters affecting the inversion results are determined. In order to ensure the accuracy of the inversion, the inversion results of the conventional stochastic inversion method and the high-precision stochastic inversion method are compared. The results of high precision random inversion are considered to be more effective in SLG gas field. (4) on the basis of high precision inversion results, combined with geological understanding, the distribution characteristics of sand bodies in SLG area are comprehensively analyzed. The reliability of high precision random inversion results is further verified by single well sand body error analysis. To sum up, high precision random inversion has achieved good application effect in SLG gas field and improved reservoir prediction accuracy, which has important practical application value.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4
【参考文献】
相关期刊论文 前4条
1 杨敏芳;杨瑞召;;随机岩性反演在茂兴地区薄储层预测中的应用[J];石油天然气学报;2009年03期
2 刘勇江;邓萍;;井约束地震反演在YB地区长兴组的应用[J];江汉石油科技;2012年04期
3 孙友权;熊晓军;罗鑫;王嘉;;高精度随机反演方法及在苏里格气田的应用[J];科学技术与工程;2014年32期
4 林功成;雷新华;张新;刘豪杰;徐宏节;;随机反演在薄储层预测中的应用——以长岭断陷登娄库组为例[J];油气地球物理;2012年04期
，本文编号：2269550
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2269550.html
