阿尔金山前东段牛东地区侏罗系成岩作用及其对储层物性的影响

doi:10.3969/j.issn.1673-8926.2016.01.007

Lithologic Reservoirs ›› 2016, Vol. 28 ›› Issue (1): 58-64.doi: 10.3969/j.issn.1673-8926.2016.01.007

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Diagenesis of Jurassic and its influence on reservoir properties in Niudong area, eastern Altun foreland

Wu Zhixiong¹,Wang Bo¹,Zhao Jian¹,Zou Kaizhen¹,Zhou Fei¹,Xiong Kun²

1. Research Institute of Exploration and Development ， PetroChina Qinghai Oilfield Company ， Dunhuang 736202 ， Gansu ， China ； 2. No. 1 Oil Production Plant ， PetroChina Qinghai Oilfield Company ， Dunhuang 736202 ， Gansu ， China

Online:2016-01-20 Published:2016-01-20

Abstract

Abstract:

Based on the data of cores, cast thin sections, scanning electronic microscope and physical properties, the reservoir characteristics of Jurassic in Niudong area of Altun foreland in northern margin of Qaidam Basin were studied, and the controlling factors of reservoir development were analyzed. The results show that clastic reservoirs of Jurassic are mainly of feldspathic litharenite and lithic arkose; primary intergranular pore, dissolved pore and fracture are the main reservoir space types, and the dissolved pore is the key factor for improving the reservoir properties; diagenesis has great influence on the reservoir properties. Compaction and cementation made the reservoir properties poor, but dissolution and fracturing improved the reservoir properties.

Key words: shale reservoir , nitrogen adsorption method , pore structure , organic matter , mineral composition , Yanchang Formation , Ordos Basin

Wu Zhixiong,Wang Bo,Zhao Jian,Zou Kaizhen,Zhou Fei,Xiong Kun. Diagenesis of Jurassic and its influence on reservoir properties in Niudong area, eastern Altun foreland[J].Lithologic Reservoirs, 2016, 28(1): 58-64.

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