靖边气田陕384~陕400井区奥陶系岩溶古地貌及储层特征研究

发布时间：2018-03-17 16:42

本文选题：靖边气田　切入点：马家沟组　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：古岩溶地貌形态对碳酸盐岩风化壳岩溶型优质储层的发育与分布起着重要的控制作用。靖边气田陕384井区位于下古生界奥陶系顶部风化壳内,但长期以来对该井区岩溶古地貌及其对储层控制作用,缺乏细致研究。本论文以鄂尔多斯盆地靖边气田陕384井区马家沟组马五段岩溶古地貌恢复为研究对象,在研究区钻录井资料、测井资料、分析化验资料、试气资料及生产动态资料综合分析与研究的基础上,恢复研究区岩溶古地貌,并探讨其对储层的影响。研究取得了以下几个方面的认识:1、研究区马五段各小层保存程度差异较大,西北部各小层剥蚀强烈,东南部各小层保存程度好,自西北向东南、自上而下剥蚀程度依次减弱。2、研究区风化壳岩溶作用强烈,储层孔隙以溶孔、晶间孔、微裂隙和膏模孔为主,其中:马五1~3和马五4~(1a)平均孔隙度和平均渗透率均较高是研究区的主要目的层。3、综合印模法、残厚法和古地质法研究发现,研究区发育残丘、岩溶洼地及其间斜坡(陡坡和缓坡)等岩溶地貌单元;残丘区马五13表生岩溶作用强烈,表生岩溶带、垂直渗流与水平潜流交替带发育,溶孔、晶间孔、微裂隙发育;岩溶洼地区马五41a溶蚀强烈,但该处表生岩溶带和垂直渗流基本不发育。4、钻测井、孔渗、生产资料证实残丘区,即马五13残留区,表生岩溶作用强烈,溶孔、晶间孔、微裂隙发育,为有利勘探区。其次为岩溶洼地区马五41a溶蚀区,该区水平潜流形成的溶孔、微裂隙和膏模孔较发育。据此,对有利区进行了预测,并对研究区主要目的层进行了有利区预测。
[Abstract]:The paleokarst geomorphology plays an important role in controlling the development and distribution of karst high quality reservoirs in carbonate weathering crust. Shaan384 well area of Jingbian gas field is located in the weathering crust on the top of Ordovician system of Lower Paleozoic. However, for a long time, the karst paleogeomorphology and its controlling effect on reservoir in this well area are not studied in detail. This paper takes the restoration of karst paleogeomorphology in Majiagou formation of Majiagou formation in Jingbian gas field, Ordos Basin, as the research object. On the basis of comprehensive analysis and study of drilling logging data, logging data, analysis of laboratory data, gas test data and production dynamic data, the karst paleogeomorphology of the study area is restored. And discussed its influence on the reservoir. The study obtained the following several aspects of understanding: 1, the study area Ma five member of each layer preservation degree difference is big, northwest each small layer erosion is strong, the southeast each small layer preservation degree is good, from northwest to southeast, The degree of denudation decreases from top to bottom. 2. The karst effect of weathering crust is strong in the study area. The porosity of reservoir is mainly dissolved pore, intergranular pore, microfracture and mold pore. The high average porosity and average permeability are the main target layer of the study area. The synthetic impression method, the residual thickness method and the paleogeology method show that the residual mound is developed in the study area. Karst depressions and their interslope (steep and gentle slopes) karst geomorphologic units, the residual mound area Ma 513 supergene karstification strong, supergene karst zone, vertical seepage and horizontal subsurface flow alternate zone development, solution pore, intergranular pore, microfracture development; The dissolution of Mawu41a in Karst area is strong, but the supergene karst zone and vertical percolation in this area are basically not developed. 4. Drilling logging, pore permeability, production data confirm that the residual hill area, that is, the residual area of Ma Wu 13, has strong supergene karstification, dissolution pore, intergranular pore, etc. The development of microfissures is favorable for exploration, followed by the dissolution area of Mawu41a in karst area, where the dissolution pores formed by horizontal subsurface flow, microfissures and mold holes are relatively developed. Based on this, the favorable areas are predicted. The favorable zones were predicted for the main target layers in the study area.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P534.42

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