昆北断阶带基岩储层特征及油气成藏条件

doi:10.3969/j.issn.1673-8926.2015.02.010

Lithologic Reservoirs ›› 2015, Vol. 27 ›› Issue (2): 62-69.doi: 10.3969/j.issn.1673-8926.2015.02.010

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Characteristics of basement reservoirs and hydrocarbon accumulation conditions in the northern Kunlun fault zone

LIU Guizhen¹， ZHANG Deshi²， LI Nengwu²

1. School of Earth Science and Engineering ， Xi ’ an Shiyou University ， Xi ’ an 710065 ， China ； 2. Research Institute of Exploration and Development ， PetroChina Qinghai Oilfield Company ， Dunhuang 763202 ， Gansu ， China

Online:2015-03-03 Published:2015-03-03

Abstract

Abstract:

Based on core observation, thin section identification, scanning electron microscopy analysis, logging data and physical properties, this paper studied the characteristics of basement reservoirs and hydrocarbon accumulation conditions in the northern Kunlun fault zone. The results indicate that the basement reservoirs are mainly of granite and metamorphic slate, the reservoir spaces of granite are mainly dissolved fractures, tectonic fractures and dissolved pores, and the main reservoir spaces of slate is tectonic fractures. The main conditions of hydrocarbon accumulation in the basement rocks include good source conditions, rich reservoir spaces of tectonic fractures, dissolved fractures and dissolved pores, as well as various traps and good migration system. Multi-stage faults, unconformity surface and weathering crust are the controlling factors of hydrocarbon accumulation.

Key words: tight sand, seismic attributes, petrophysics, pre-stack inversion, reservoir prediction

LIU Guizhen， ZHANG Deshi， LI Nengwu. Characteristics of basement reservoirs and hydrocarbon accumulation conditions in the northern Kunlun fault zone[J].Lithologic Reservoirs, 2015, 27(2): 62-69.

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