岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 176–182.doi: 10.3969/j.issn.1673-8926.2015.05.029

• 油气地质 • 上一篇    下一篇

中西部地区中小盆地碎屑岩储层特征及含油气性分析

黄军平1,2,杨占龙1,2,刘洪军3,邸 俊1,黄云峰1,2,韩小锋4   

  1.  1. 中国石油勘探开发研究院 西北分院,兰州 730020 ; 2. 中国石油天然气集团公司油藏描述重点实验室,兰州 730020 ; 3. 西安石油大学 地球科学与工程学院,西安 710065 ; 4. 中国地质调查局西安地质调查中心,西安 710054
  • 出版日期:2015-09-26 发布日期:2015-09-26
  • 第一作者:黄军平( 1983- ),男,硕士,工程师,主要从事石油天然气地质综合研究方面的工作。 地址:( 730020 )甘肃省兰州市城关区雁儿湾路 535号。 E-mail : cnhjp2007@163.com 。
  • 基金资助:

    国家重大科技专项“岩性地层油气藏成藏规律、关键技术及目标评价”(编号: 2011ZX05001 )、中国石油天然气股份有限公司重大科技专项“中国石油第四次油气资源评价”(编号: 2013E-0502 )与“玉门油田重上百万吨勘探开发关键技术研究”(编号: 2013E-3302 )联合资助

Clastic reservoir characteristics and oil-bearing properties within middle and small-sized basins in the central and western regions of China

Huang Junping12, Yang Zhanlong12, Liu Hongjun3, Di Jun1, Huang Yunfeng12, Han Xiaofeng4   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest , Lanzhou 730020 , China ; 2. Key Laboratory of Reservoir Description , CNPC , Lanzhou 730020 , China ; 3. School of Earth Science and Engineering , Xi ’ an Shiyou University ,Xi ’ an 710065 , China ; 4. Xi ’ an Center of Geological Survey , China Geological Survey , Xi ’ an 710054 , China
  • Online:2015-09-26 Published:2015-09-26

摘要:

中西部地区中小盆地油气显示丰富,但勘探程度总体较低,油气发现较少。 以碎屑岩储层为研究对象,依据岩心观察、野外地质调查与实验分析,对中小盆地碎屑岩储层特征及含油气性影响因素进行了深入研究。结果表明:①中西部地区中小盆地共发育 5 套碎屑岩储层,分别为处于海陆过渡相沉积环境的石炭系—二叠系和三叠系、处于陆相沉积环境的侏罗系含煤层系和白垩系非含煤层系及处于冲积扇沉积环境的古近系—新近系;②砂岩储层较为发育,但其物性较差,属于低孔、低渗型储层,且含油气饱和度较低;③砂岩储层的矿物成分以石英、长石、黏土矿物、方解石和白云石为主,不同构造背景与沉积环境形成的储层,其矿物成分存在差异;④砂岩储层储集空间类型丰富,主要有粒内孔、粒间孔、微裂缝和有机质孔等 4 种类型;⑤砂岩储层的含油气性主要受沉积相带、岩石矿物组成、储层物性和储集空间类型等因素影响。

关键词: 砂(砾)岩, 稀土元素, 物源, 白垩系, 鸭儿峡地区, 酒西盆地

Abstract:

The oil and gas shows are enriched in middle and small-sized basins in the central and western regions of China, but only few proven reserves were found with low exploration degree. Based on core observation, field outcrop data and experimental analysis, the clastic reservoir characteristics and the controlling factors of oil-bearing properties were analyzed. The results show that: (1) there are developed five sets of clastic reservoirs in the middle and smallsized basins, which are respectively in the Carboniferous-Permian and Triassic strata in transitional facies depositional environment, in the Jurassic coal-bearing strata and Cretaceous non-coal-bearing strata in continental depositional environment, and in the Tertiary strata in alluvial fan depositional environment; (2) the sandstone reservoirs are well developed, but they have poor properties with low porosity, low permeability and low hydrocarbon saturation; (3) the mineral compositions of sandstone reservoir are mainly quartz, feldspar, clay minerals, calcite and dolomite, and different tectonic setting and depositional environment affected mineral compositions of the reservoir; (4) the reservoir space types are rich, including intraparticle pores, interparticle pores, microcracks and organic-matter pores; (5) the oil-bearing properties of sandstone reservoirs are mainly affected by sedimentary facies, rock and mineral compositions, reservoir properties and reservoir space types and other factors.

Key words:  sandstone ( conglomerate ), rare earth elements, provenance , Creaceous , Yaerxia area , Jiuxi Basin

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