宁夏古峰庄～红井子地区长A、长B复杂油藏成藏富集规律研究

摘要

鄂尔多斯盆地西缘古峰庄~红井子地区横跨西缘逆冲带和天环坳陷两大构造带,构造环境复杂,导致成藏控制因素及分布规律复杂,特别是长B油藏试油试采矛盾突出,产能主控因素不明,给油藏评价工作带来很大困难.本文重点从物源、沉积特征、构造(断层)圈闭、储层物性等因素对油藏控制,归纳总结该地区长A、长B的成藏主控因素及富集规律,剖析影响长A、长B产能主控因素.重点总结出了古峰庄~红井子地区受到了早期鼻状隆起带圈闭成藏、逆断层圈闭成藏及晚期天环坳陷东正断层改造型圈闭油藏,通过对该区圈闭成藏特点研究,有利于对后期宁夏增储评价有重要指导意义.%Ordos basin Gufengzhuang~Hongjingzi area across the western margin thrust belt and Tianhuan depression two tectonic belt, tectonic environment is complex.Leading to ac-cumulation distribution and controlling factors of the complex, especially the Chang B reser-voir oil production capacity contradictions, the main controlling factors is unknown, which brings great difficulties to the reservoir the evaluation work. This paper mainly from the source, the sedimentary characteristics, tectonic(fault)trap, reservoir and other factors on the reservoir control, summarize and enrichment regularity of the Chang A and Chang B reservoir controlling factors, analyzing the impact of Chang A and Chang B capacity main controlling factors.The key to summarize Gufengzhuang~Hongjingzi area by early nose uplift belt trap, reverse fault trap and late Tianhuan depression orthodox reformed fault trap reser-voir.The reservoir characteristics of research in this area is conducive to the late trap,Ningx-ia reservoir evaluation has an important guiding significance.