摘要
尕斯库勒油田是柴达木盆地油气最富集的地区,发育了E31油藏和N1—N21油藏。对这两个油藏48个原油样品进行了常规柱色谱分离,应用含氮化合物参数并结合其复杂背斜构造的地质背景、E31和N1—N21油藏砂体展布及E31油藏解剖研究,系统分析了该区深、浅油藏原油的运移方向和油气充注点。E31油藏Ⅰ+Ⅱ和Ⅲ+Ⅳ油层组油气运移方向为从背斜中北部向南北两侧运移,其油源区为茫崖凹陷和尕斯断陷;Ⅰ+Ⅱ油层组的油气注入点为背斜中部的9-7井的两侧,而Ⅲ+Ⅳ油层组油气注入点为8-34井和9-38井的位置;N1—N21油藏中的油气沿着整个断层面向上运移到储集层内并聚集成藏,油源区主要为茫崖凹陷。尕斯库勒油田的主要运移通道为断层和砂岩储集体,形成以背斜为主的油气藏。
Gasikule Oilfield is an area rich in oil and gas in the Qaidam Basin and contains the E3^1 and N1-N2^1 oil reservoirs. Through conventional column chromatographic extraction of 48 oil samples, this paper investigates the oil migration and charge direction using the nitrogen compounds, the sandbody distribution in E3^1 and N1-N2^1 , and the E3^1 reservoir dissection. Oil in the Ⅰ＋Ⅱ and Ⅲ＋ Ⅳ oil layers of the E3^1 reservoir migrates from middle-north of the anticline to its south and north, and its oil source areas are the Mangya Sag and the Gasi rift-subsidence. The injection spots of the Ⅰ＋Ⅱ oil layer are the two sides of Well 9-7 in the middle of the anticline, and the injection spots of the Ⅲ＋ Ⅳ oil layer are Wells 8-34 and 9-38. The N1-N2^1 reservoir oil is mainly from the Mangya Sag and migrates to reservoirs upwards along faults. Faults and sandbodies are the main transport channel in the field and most reservoirs are anticlinal.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2008年第3期301-307,共7页
Petroleum Exploration and Development
基金
中国石油天然气股份有限公司科技工程项目(970208-02)
