新场构造带须家河组二段储层成岩相研究

发布时间：2018-03-14 13:53

本文选题：新场构造带　切入点：须家河组二段　出处：《成都理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：新场构造带须家河组二段埋藏较深,主要处于中成岩B期,属于特低孔、低渗透致密砂岩储层,非均质性很强,成岩作用对储层的影响非常显著,是控制储层质量的关键因素,而成岩相是储层中各种成岩作用的直接表现。本文以新场构造带须家河组二段为研究对象,以岩芯观察和薄片鉴定为基础,结合扫描电镜、X-射线衍射、阴极发光、电子探针、包裹体测温、碳、氧同位素测试、物性分析等手段进行了储层岩石学特征、成岩作用和成岩相类型及特征的研究。通过对测井响应特征分析建立的成岩相测井解释模型是研究区成岩相划分的重要手段,再以成岩相常规划分方法为基础,综合研究录井显示、测井解释和生产测试等资料,总结出了各主要成岩相的综合判别标准。再通过单井和连井成岩相的划分与对比分析,明确了研究区须二段成岩相空间展布特征,并且进一步分析了其中有利成岩相控制因素。论文取得的主要成果如下:1.研究区须家河组二段储层砂岩最主要的岩石类型为岩屑砂岩、岩屑石英砂岩和长石岩屑砂岩。须二段各亚段储层砂岩在组分、结构、胶结物类型及孔隙类型上都存在着差别。2.研究区须家河组二段储层砂岩的破坏性成岩作用有压实作用和胶结作用;建设性成岩作用有溶蚀作用和破裂作用;保持性成岩作用有绿泥石环边胶结作用及部分早期碳酸盐、硅质胶结作用。3.研究区须家河组二段整体处于中成岩阶段B期,各亚段具有不同的成岩演化历史。压实作用是造成研究区须家河组储层孔隙度降低的第一重要因素,碳酸盐胶结作用和硅质胶结作用使研究区砂岩进一步致密化。4.研究区须家河组二段主要成岩相类型有压实相、溶蚀相、钙质胶结相、硅质胶结相、绿泥石胶结相、破裂相以及溶蚀—压实相、溶蚀—胶结相和胶结—压实相等。5.须二段有利于相对优质储层发育的成岩相为绿泥石胶结相、破裂相和溶蚀相,硅质胶结相和溶蚀-压实相在一定程度上也是有利的成岩相,是较有利的成岩相,而钙质胶结相、压实相和胶结-压实相则不利于储层的发育。6.成岩相的控制因素主要有砂岩岩石学特征、沉积微相和裂缝发育程度。
[Abstract]:The second member of Xujiahe formation in Xinchang structural belt is deeply buried and is mainly in the B stage of middle diagenesis. It belongs to ultra-low porosity, low permeability tight sandstone reservoir, strong heterogeneity, and the diagenesis has a very significant influence on reservoir, which is the key factor to control reservoir quality. The diagenetic facies are the direct manifestation of diagenesis in reservoir. In this paper, the second member of Xujiahe formation in the new field structural belt is taken as the object of study, based on core observation and sheet identification, combined with scanning electron microscopy (SEM), X-ray diffraction, cathodoluminescence, electron probe, etc. The petrological characteristics of reservoir were carried out by means of inclusion temperature measurement, carbon and oxygen isotope measurement, physical property analysis, etc. Study on diagenesis, types and characteristics of diagenetic facies. The diagenetic facies log interpretation model established by analyzing log response characteristics is an important means of diagenetic facies division in the study area, and is based on the conventional diagenetic facies classification method. Comprehensive study of logging data, well logging interpretation and production testing data, summed up the main diagenetic facies comprehensive discrimination criteria, and then through the single well and continuous well diagenetic facies division and correlation analysis, The spatial distribution characteristics of diagenetic facies in Xu2 member of the study area are defined. The main results obtained in this paper are as follows: 1. The main rock types of reservoir sandstone in the second member of Xujiahe formation are lithic sandstone. Lithic quartz sandstone and feldspar lithic sandstone. There are differences in cementation type and pore type. 2. The destructive diagenesis of sandstone in the second member of Xujiahe formation in the study area has compaction and cementation, constructive diagenesis has dissolution and fracture action, and the formation of sandstone in the second member of Xujiahe formation in the study area has been studied. Retention diagenesis includes chlorite ring cementation and some early carbonate and siliceous cementation .3.The second member of Xujiahe formation in the study area is in stage B of the middle diagenetic stage. Each submember has different diagenetic evolution history. Compaction is the first important factor to decrease reservoir porosity in Xujiahe formation. Carbonate cementation and siliceous cementation further densify sandstone in the study area. 4. The main diagenetic facies in the second member of Xujiahe formation are compacted facies, dissolution facies, calcareous cementation facies, siliceous cementation facies and chlorite cementation facies. Fracture facies and dissolution compaction facies, dissolution cementation facies and cementation compaction equal .5.Diagenetic facies in the second member of Xu2 are chlorite cementation facies, fracture facies and solution facies, which are favorable for the development of relatively high quality reservoir. The siliceous cementation facies and the dissolution compaction facies are also favorable diagenetic facies to some extent, while the calcareous cementation facies are the favorable diagenetic facies. Compaction facies and cement-compaction facies are unfavorable to reservoir development .6.The controlling factors of diagenetic facies are mainly sandstone petrology, sedimentary microfacies and fracture development degree.
【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

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