Mechanisms of Petroleum Accumulation of Structural Reservoir in No.5 Unit of Lenghu Area in Qaidam Basin

Abstract

Abstract: No.5 unit of Lenghu area is one of important targets for exploration of Lenghu structural zone in northern margin of Qaidam basin, where the huge source rocks of Jurassic was found by Well Lenke-1, thus demonstrating its abundant source potentials in this area. This paper presents the typical mode of hydrocarbon accumulation of structural reservoirs in Lenghu-5 structural zone, showing that there exist two stages of hydrocarbon accumulation, accordingly forming two sets and types of reservoirs. One is deep and the other is shallow. The original deep one (J-E) was formed during E₃-N₁, and the secondary shallow one (N) formed after end of N₂. The shallow one is lower than the deep one in hydrocarbon maturity; the former is characterized by early charging and late forming, and the latter is by early forming and long-term charging.

Key words: Qaidam basin, Lenghu structural zone, source rock, oil-generating window, hydrocarbon migration, hydrocarbon accumulation

CLC Number:

TE111

SUN De-qiang, LIU Hai-tao, YU Hui-long, LIU Jin-cheng, ZHANG Tao. Mechanisms of Petroleum Accumulation of Structural Reservoir in No.5 Unit of Lenghu Area in Qaidam Basin[J]. Xinjiang Petroleum Geology, 2006, 27(4): 435-439.

References

[1] 张厚福, 方朝亮, 高先志, 等. 石油地质学[M]. 北京: 石油工业出版社, 1999. 263.
[2] 王连捷, 张利容, 定佳音, 等. 地应力与油气运移[J]. 地质力学学报, 1996, 2(2): 3-10.
[3] 刘震, 曾宪斌. 沉积盆地地温与地层压力关系分析[J].地质学报, 1997, 7(2): 180-185.
[4] 王红才, 王蔽, 王连接, 等. 油田三维构造应力场数值模拟与油气运移[J]. 地球学报, 2002, 23(2): 175-178.
[5] Magoon L B, DowWG. 含油气系统——从烃源岩到圈闭[M].张刚, 获希源, 高泳生, 等译. 北京: 石油工业出版社,1998.
[6] 赵文智. 中国含油气系统基本特征与评价方法[M]. 北京: 科学出版社, 2003. 118-124.
[7] 张厚福. 石油地质学新进展[M]. 北京: 石油工业出版社,1998. 37-86.
[8] Hunt J M. Generation and migration of petroleum from abnormally pressured fluid compartments[J].AAPG Bulletin. 1990, 74(1): 1-12.
[9] 郝石生. 封存箱[J]. 中国海上油气(地质), 1993, 7(1): 61-69.
[10] 罩建雄, 张长俊, 李天生, 等. 西昌盆地流体包裹体及其在油气勘探中的应用[J]. 石油与天然气地质, 1994, 15(3): 216-224.
[11] 高先志, 陈发呆. 应用流体包裹体研究油气成藏期次——以柴达木盆地南八仙油田第三系储层为例[J]. 地学前缘, 2000, 7(4): 548-554.
[12] 李明诚. 石油与天然气运移研究综述[J]. 石油勘探与开发, 2000, 27(4): 3-10.
[13] 康永尚, 庞雄奇. 油气成藏流体动力系统分析原理及应用[J]. 沉积学报, 1998, 16(3): 80-84.
[14] 龚再升, 杨甲明. 油气成藏动力学及油气运移模型[J].中国海上油气(地质), 1999, 13(1): 235-239.
[15] 张厚福, 方朝亮. 盆地油气成藏动力学初探——21 世纪油气地质勘探新理论探索[J]. 石油学报, 2002, 23(4): 7-12.