靖边气田西部地区奥陶系顶部侵蚀面解释技术  

Interpretation techniques of the Top Ordovician erosional surface in Jingbian Gas-field,western region of the Ordos Basin

作　　者：郭庆[1,2] 孙卫[1] 余小雷 曾令帮 王妍[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069 [2]东方地球物理勘探公司研究院长庆分院,陕西西安710021

出　　处：《西北大学学报（自然科学版）》2013年第6期947-951,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(41102081)

摘　　要：靖边气田西侧奥陶系顶部风化壳马家沟组气藏是一个与古岩溶或不整合面有关的大型古地貌-岩性气藏,前石炭纪古地貌台、沟、坑共存的特征控制了储层的分布和天然气的运移、聚集。因此,准确恢复古地貌是揭示马家沟组气藏规模的关键。文中从该气藏的区域地质背景、地质、地球物理特征分析入手,通过模型正演、层拉平、地震属性分析、相对纵波阻抗反演为主的奥陶系顶部侵蚀面解释技术对研究区前石炭纪岩溶古地貌进行恢复。经钻探实践的检验,该技术系列具有工业化生产能力,在靖边气田马家沟组气藏探明储量的提交以及井位优选中可发挥重要的作用。Majiagou group gas reservoir is a large palaeogeomorphology-lithologic gas reservoir relevant to ancient karst or unconformity of the top Ordovician in Jingbian Gas-field western region. The coexistence of pre-Carbonifer- ous palaeogeomorphology platform, trenches, pits controls reservoir distribution and gas migration and accumula- tion. Hence, the accurate recovery palaeogeomorphology is the key to reveal the size of the gas reservoir of Majia- gou group. In this article it is to analyze from regional geological setting of the gas reservoir, geological, geophysi- cal characteristics by drilling practice test, the technical series has the industrialized production capacity, and has an important role in submitting proved reserves of Majiagou group gas reservoir and selecting well location in Jingbi- an Gas-field.

关 键 词：鄂尔多斯盆地 马家沟组 侵蚀沟槽 潜台 残丘 潜坑 

分 类 号：TE132[石油与天然气工程—油气勘探]