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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 11    November 2018

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Reservoir characteristics and hydrocarbon accumulation of Carboniferous volcanic weathered crust of Zhongguai high area in the western Junggar Basin, China
LI Hu(李虎)1, 2, TANG Hong-ming(唐洪明)1, 2, QIN Qi-rong(秦启荣)1, 2, FAN Cun-hui(范存辉)1, 2,HAN Song(韩嵩)3, YANG Cang(杨仓)4, ZHONG Cheng(钟城)1, 2

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,
Southwest Petroleum University, Chengdu 610500, China;
2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
3. Research Institute of Petroleum Exploration and Development, Petrochina Southwest Oil & Gasfield Company, Chengdu 610000, China;
4. CNPC International (Nile) Ltd., Beijing 100034, China

Abstract:Based on the drilling, cores, logs, seismic, laboratory analysis and so on, reservoir characteristics and hydrocarbon accumulation of Carboniferous volcanic weathered crust in Zhongguai high area are studied. Volcanic rocks were formed in an island arc environment. The lithology is mainly andesite and tuff; Reservoir spaces are mainly secondary pore, fracture and their combination forms, fractures have a better effect on reservoir seepage; There are four layer structures of volcanic weathered crust, weathered clay layer, strongly weathered zone, weakly weathered zone and unweathered zone and strongly weathered zone is the best, which is the main reservoir development zone; The development of reservoir is mainly affected by weathering-leaching, lithology and lithofacies, and fault (fracture); Effective reservoirs could reach to 480 m thickness (high quality reservoirs are within 240 m). Carboniferous volcanic reservoirs are distributed along three zones, which are near the fault zone, high structural part, favorable lithofacies development zone, and one plane, which is near the unconformity.

 

Key words: reservoir characteristics; volcanic weathered crust; fracture; hydrocarbon accumulation; Carboniferous; Zhongguai high area

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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