高石梯—磨溪震旦系灯四段碳酸盐岩储层特征研究

发布时间：2018-02-24 12:42

本文关键词： 构型储层特征地质建模　出处：《成都理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：研究区高石梯-磨溪区块近年来成为研究的热点地区,该区储层主要为受岩溶控制的碳酸盐岩储层,缝洞分布复杂,非均质性强。在此之前,相关学者对研究区的构造特征、沉积环境、储层成因等方面进行了初步的研究,但是随着区块勘探及开发的不断深入,逐渐获取了更多的地质资料,新的问题就会不断出现,因此迫切需要深入开展有关地质方面的工作。本论文针对研究区灯四段碳酸盐岩储层特征进行研究,对明确研究区勘探方向、优选勘探目标和后期气藏开发具有重要的指导意义。研究区层序地层的划分是在前人三级层序划分的基础上,运用P.Vail经典层序地层学理论,以区域层序界面标志为主控,考虑岩性、沉积旋回和电性组合特征相辅,从取心基干井出发,由点到线,从线到面,兼顾“就近、闭合”的原则,从长时间尺度到短时间尺度将灯四段储层划分为6个四级准层序。此外,通过对野外剖面、钻井取芯,测井资料的观察分析,结合岩石学特征、结构、构造以及测井曲线等相标志,从单井沉积相分析以及沉积相平面展布两个方面来对研究区灯四段储层沉积相进行研究,认为灯四段主要发育丘滩和台坪亚相,其中丘滩亚相主要发育在研究区中部,四周则主要发育的是台坪亚相,泻湖亚相欠发育,仅在SQ4-1小层可见。通过岩心观察、野外剖面、测井资料的观察分析,从储层岩性特征、物性特征以及构型特征这几个方面对储层特征进行研究,其中着重从构型特征的角度来对储层特征进行研究。构型的研究是在对储集空间及其组合特征的研究基础上进行的,将灯四段储层构型划分为层状溶洞构型、葡萄花边状溶洞构型、角砾间溶洞构型、缝洞组合构型这4类,并总结了每类构型的特征。此外利用测井的方法建立储层构型的识别模板,为下一步“构型”相控建模打下基础。各储层构型在空间上的分布可以反映储层的非均质性。因此在对储层构型的研究基础上,充分理解前人对碳酸盐岩储层的建模思路,借鉴碎屑岩中相控建模的思路,利用储层构型的分布作为储层物性参数分布的控制条件,建立了储层的三维地质模型。另外,由于缝洞型碳酸盐储层属于多重介质,本文对基质—裂缝—溶洞三重介质的属性建模作了探索性的研究。在建立的地质模型的基础上,分析储层构型在纵向上和平面上分布情况,并对研究区有利区带进行预测。研究区有利的储层主要为层状溶洞构型以及缝洞组合构型类储层。纵向上,层状溶洞构型以及缝洞组合构型在储层构型中发育的厚度大,构型顺层发育明显,横向延伸远,纵向变化快,差异大。平面上,无论是层状溶洞构型还是缝洞组合构型,都主要发育西侧南北条带区,中部次之,东部最少。因此,研究区西侧南北向带状区以及部分中部区域为储层发育的有利区块,其储层要优于东部地区。
[Abstract]:In recent years, Gaoshititi-Moxi block has become a hot area in the study area. The reservoir in this area is mainly carbonate reservoir controlled by karst. The distribution of fractures and cavities is complex and heterogeneity is strong. Before that, the structural characteristics of the study area were studied by relevant scholars. The sedimentary environment, reservoir genesis and other aspects have been preliminarily studied. However, with the deepening of exploration and development in the block, more geological data have been gradually obtained, and new problems will continue to emerge. Therefore, there is an urgent need to carry out geological work in depth. In this paper, the characteristics of carbonate reservoir in the fourth member of the study area are studied, and the exploration direction of the study area is defined. The classification of sequence stratigraphy in the study area is based on the previous third-order sequence division, and the main control is based on P.Vail 's classical sequence stratigraphy theory, with the regional sequence interface mark as the main control. Considering the characteristics of lithology, sedimentary cycles and electrical combination, starting from the core base stem well, from point to line and from line to surface, the principle of "proximity and closure" is taken into account. From long time scale to short time scale, the fourth member reservoir is divided into 6 four grade quasi sequences. In addition, through the observation and analysis of field profile, core drilling and logging data, combined with the petrological characteristics and structure, Structure and logging curve are used to study the reservoir sedimentary facies of the fourth member of the study area from two aspects: single well sedimentary facies analysis and sedimentary facies plane distribution. It is considered that the dome and Taiping subfacies are mainly developed in the fourth member of the formation. The hilly subfacies mainly developed in the middle of the study area, while the Taiping subfacies and the lagoon subfacies were underdeveloped around the study area. Through the observation and analysis of core observation, field profile and logging data, the lithologic characteristics of the reservoir were analyzed from the reservoir lithology. The reservoir characteristics are studied in the aspects of physical and structural characteristics, especially from the perspective of structural characteristics. The study of configuration is based on the study of reservoir space and its assemblage. The reservoir structures of the fourth member of the Chang Chang formation are divided into four types: the layered cave configuration, the grape lace-shaped cavity configuration, the breccia karst cavity configuration, and the fracture-cavity combination configuration. The characteristics of each type of configuration are summarized. In addition, the identification template of reservoir configuration is established by using logging method. The spatial distribution of each reservoir configuration can reflect the heterogeneity of the reservoir. Therefore, based on the study of the reservoir configuration, we fully understand the previous ideas of carbonate reservoir modeling. Based on the idea of facies control modeling in clastic rocks and using the distribution of reservoir configuration as the control condition for the distribution of reservoir physical parameters, a three-dimensional geological model of reservoir is established. In this paper, the attribute modeling of matrix, fissure and cavern triple media is studied. On the basis of the geological model, the distribution of reservoir configuration in vertical and plane is analyzed. The favorable zones in the study area are predicted. The favorable reservoirs in the study area are mainly stratified cave configuration and fracture-cavity combination type reservoirs. On the plane, both the layered cave configuration and the joint-cavity combination configuration are mainly developed in the north and south of the western side, followed by the middle part, and the eastern part is the least. The south-north zonal zone and part of the central part of the study area are favorable blocks for reservoir development, and the reservoir is superior to that in the eastern region.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

【相似文献】