靖边气田高桥-杏河地区马家沟组五_(1+2)段储层发育特征及其主控因素研究  

Study on reservoir development characteristics and main controlling factors of 5_(1+2) member of Majiagou Formation in Gaoqiao Xinghe Area,Jingbian Gas Field

作　　者：李朝旭 王汝阳 唐宏 孙靖虎 LI Zhaoxu;WANG Ruyang;TANG Hong;SUN Jinghu(Gas Field Development Division,Changqing Oilfield Company,PetroChina,Xi'an 710018,China;No.6 Gas Production Plant,Changqing Oilfield Company,PetroChina,Yulin 718600,China)

机构地区：[1]中国石油长庆油田分公司气田开发事业部,陕西西安710018 [2]中国石油长庆油田分公司第六采气厂,陕西榆林718600

出　　处：《中国矿业》2022年第3期164-172,共9页China Mining Magazine

摘　　要：为查明靖边气田高桥-杏河地区马五_(1+2)段储层的发育特征及主控因素,本文通过观察岩芯、薄片及压汞实验分析储层孔隙结构及物理特性,分析沉积过程、成岩作用及构造因素对储层空间发育的影响。结果表明:马五_(1+2)段的储集空间为后期膏溶孔、溶蚀缝和构造缝,其吼道宽度较大,原生晶间孔少量发育,孔吼细小,储层渗透率整体较低,裂缝发育段渗透率明显增高。马五_(1)亚段储层孔隙度和渗透率之间为简单的线性关系,马五_(2)亚段储层孔隙度和渗透率之间关系不明显。强蒸发环境下的膏质沉积为储层的形成提供了物质基础,后期白云岩化作用增大储层的脆度,有利于构造微缝的形成,石膏的溶解有助于膏溶孔的形成,而石英和方解石充填作用等破坏储层空间的形成,因此构造作用产生的微裂缝为石膏溶解提供通道的同时也加大储集空间,沟通孤立孔隙,是后期溶蚀孔隙发育的主要因素。In order to ascertain the development characteristics and main controlling factors of Ma 5_(1+2) member of the Majiagou formation in Gaoqiao-Xinghe Area of the Jingbian Gas Field,the pore structure and physical properties of the reservoir are analyzed by core thin section observation and mercury injection experiment,and the influence of diagenesis and tectonic factors in the sedimentary process on the reservoir space development is analyzed.The results show that the reservoir space of Ma 5_(1+2) member is late gypsum solution pore,dissolution fracture and structural fracture.Its roar channel width is large,a small number of primary intergranular pores are developed,the pore roar is small,the overall reservoir permeability is low,and the permeability of fracture development section is significantly increased.The relationship between the surface degree and permeability of the Ma 5_(1) sub-member is a simple linear relationship,while of the Ma 5_(2) sub-member is not obvious.The gypsum deposit in the strong evaporation environment provided the material basis for the formation of the reservoir.The later period of dolomitization increases the brittleness of the reservoir,which would be conducive to the formation of structural micro-fractures.The dissolution of gypsum helps the formation of gypsum-dissolved pores.The filling of quartz and calcite destroys the formation of the reservoir space,and the micro-fractures produced by the tectonic process provide channels for the dissolution of gypsum.At the same time,it also enlarges the reservoir space and communicates isolated pores,which are the main factors for the development of later dissolved pores.

关 键 词：储层 主控因素 马五_(1+2)段 高桥-杏河地区 

分 类 号：P54[天文地球—构造地质学]