石楼西区块致密砂岩气藏精细描述及开发对策

发布时间：2018-01-13 11:42

  本文关键词：石楼西区块致密砂岩气藏精细描述及开发对策　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 致密砂岩气藏 地层对比 沉积相 气藏精细描述 三维地质建模

【摘要】：石楼西区块属于低压、低丰度的致密砂岩气藏,钻井揭示的主要含气层位有石盒子组盒8段和山西组,产气层位多,而沉积环境又不尽相同,导致地质情况较为复杂。各层位岩性不同,孔隙类型及结构特征也不同,储层非均质性强,砂体及有效气层连续性和连通性较差。本文以完钻井资料为基础,综合应用钻井、录井、测井资料,识别地层对比标志层,在标志层控制下,采用“旋回对比、分级控制、逐井追索、剖面闭合”的方法,完成48口直井的地层对比工作,在此基础上进行构造特征研究。结合区域的沉积背景,多次到现场观察岩心及野外露头,应用测井及岩心分析化验资料识别不同沉积环境的测井相类型,展开单井相及连井剖面相研究,进而绘制各主力小层的平面沉积相展布图。从岩性、孔隙类型及结构、物性、成岩作用及非均质性等特征的研究入手,全面掌握储层特征,最后建立了储层三维地质模型,可以以任何形式展示和调用各种属性模型,真正实现了气藏静态参数的数字化、地质体和地质属性模型化。通过对区块的气藏精细描述,取得以下认识:区块地层分布稳定,对比标志层较多,地层对比与划分准确;区块构造较为简单,局部微构造发育;区块沉积环境变化频繁,山2段主要发育近海潮汐三角洲平原沉积,山1段主要发育近海潮控三角洲前缘沉积,盒8段为辫状河三角洲前缘亚相沉积;山2段以石英砂岩、岩屑石英砂岩为主,溶孔—粒间孔型,山1段以岩屑砂岩为主,晶间孔—岩屑溶孔型,盒8段以岩屑砂岩为主,岩屑溶孔—晶间孔型,各层位非均质性均较强;区块主要储层具有超低孔——特低孔、超低渗特征,各小层物性山23段相对较好,其次是山13、盒86、山21;综合评价,主要储层以山2段相对最好,其次为山1、盒8。山2段相对含气富集区域有YH30—YH33井区、YH15—YH18井区、YH38井区,山1段相对含气富集区域有YH19—YH20井区,盒8段相对含气富集区域有YH9—YH7井区、YH15—YH17井区。在气藏描述的基础上,提出了开发对策,并优选一个水平井先导试验区。
[Abstract]:The stone floor of west block belongs to the low pressure, low abundance of tight sandstone gas reservoirs, drilling revealed the main gas bearing strata have Shihezi 8 section and the Shanxi gas group, the multiple layers, and the sedimentary environment is not the same, leading to the geological situation is more complicated. Each layer of different lithology, pore types and structure characteristics are different. Strong reservoir heterogeneity, reservoir sand body and effective continuity and connectivity is poor. Based on the finished drilling data, comprehensive application of drilling, logging, logging data, formation identification of symbol layer in the layer under the control of the "cycle comparison and hierarchical control, well tracing method section closed" complete, 48 vertical wells in the stratigraphic correlation, the study on structural characteristics on the basis of combining the regional sedimentary background, has been to the scene to observe cores and outcrops, the sedimentary environment of different applications of logging and core analysis data recognition Logging facies, single well facies expansion and the well section of the plane sedimentary facies, and then draw the main small layer map. From the lithology, pore types and structure properties, the study of diagenesis and heterogeneity characteristics of a comprehensive grasp of the reservoir characteristics, the three-dimensional geological model of reservoir set up, can be displayed in any form and various properties of call model, realize the digital reservoir static parameters, geological body and geological attribute model. Based on the block reservoir fine description, obtain the following understanding: the formation distribution of symbol layer stability, more accurate stratigraphic division and correlation of block structure is relatively simple; the local micro structure development; block, frequent changes of the sedimentary environment, mainly developed 2 mountain offshore tidal delta plain, mountain mainly developed 1 offshore tidal delta front facies, box 8 section of braided river delta front 缂樹簹鐩告矇绉，

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