准噶尔盆地吉木萨尔凹陷东部二叠系梧桐沟组湖底扇沉积特征及展布

doi:10.7623/syxb201506005

石油学报 ›› 2015, Vol. 36 ›› Issue (6): 688-698.DOI: 10.7623/syxb201506005

准噶尔盆地吉木萨尔凹陷东部二叠系梧桐沟组湖底扇沉积特征及展布

德勒恰提·加娜塔依¹, 张明玉², 陈春勇³, 谭强³, 李玲¹

1. 新疆大学地质与矿业工程学院新疆乌鲁木齐 830047;
2. 中国石油新疆油田公司油藏评价处新疆克拉玛依 834000;
3. 中国石油新疆油田公司准东采油厂地质研究所新疆阜康 831500

收稿日期:2014-11-07 修回日期:2015-04-30 出版日期:2015-06-25 发布日期:2015-08-06
作者简介:德勒恰提·加娜塔依,女,1962年7月生,1984年获新疆工学院学士学位,1992年获西南石油学院硕士学位,现为新疆大学地质与矿业工程学院研究员,主要从事石油天然气地质综合研究。Email:deleqiati@sina.com
基金资助:
新疆维吾尔自治区自然科学基金项目(2015211C253)资助。

Sedimentary characteristics and distribution of sublacustrine fan in Permian Wutonggou Formation,eastern Jimsar sag, Junggar Basin

Deleqiat Janney¹, Zhang Mingyu², Chen Chunyong³, Tan Qiang³, Li Ling¹

1. Institute of Geology and Mining Engineering, Xinjiang University, Xinjiang Urumqi 830047, China;
2. Reser voir Evaluation Department, PetroChina Xinjiang Oilfield Company, Xinjiang Karamay 834000, China;
3. Geological Research Institute, Zhundong Oil Production Plant, PetroChina Xinjiang Oilfield Company, Xinjiang Fukang 831500, China

Received:2014-11-07 Revised:2015-04-30 Online:2015-06-25 Published:2015-08-06

摘要/Abstract

摘要：

准噶尔盆地吉木萨尔凹陷东斜坡二叠系梧桐沟组发育多套厚薄不等的砂砾岩体,是研究区重要的含油气储集体。通过岩心描述、薄片观察、重矿物及粒度分析,结合测井及地震资料解释,从该套砂砾岩体的古地理特征、物源条件及岩石学特征等方面,确定其为湖底扇相沉积。通过研究吉17井区梧桐沟组一段湖底扇相标志、相类型及砂体展布,认为研究区主要为内扇亚相和中部扇亚相,以及主沟堤微相、漫溢微相、辫状沟道微相、主沟道微相等沉积微相。结合储层物性和构造特征分析,认为湖底扇相具备形成岩性油气藏的条件,油气藏形成于辫状河三角洲前缘的外围半深湖区,其沉积厚度大,分布相对稳定,储集物性好,油源充足,油气侧向和纵向上运移通道良好,运移距离较短,是发育在凹陷斜坡区半深湖相中主要的岩性油藏勘探目标。

关键词: 吉木萨尔凹陷, 梧桐沟组, 湖底扇相, 二叠系, 展布

Abstract:

As important hydrocarbon-bearing reservoirs in the study area, multiple sets of glutenite with different thicknesses are developed in Permian Wutonggou Formation on the east slope of Jimsar sag, Junggar Basin. Through core description, slice observation, heavy mineral and grain size analysis in combination with well logging and seismic data, this region was identified as sublacustrine fan facies sediments in terms of the paleo-geographic characteristics, provenance conditions and petrological characteristics of glutenites. According to the analyses on sublacustrine fan facies marks, facies types and sand body distribution in Member 1 of Wutonggou Formation, Well Ji-17, it is considered that the study area is dominated by inner-fan subfacies and middle-fan subfacies with sedimentary microfacies, such as main levee microfacies, overflow microfacies, braided channel microfacies and main channel microfacies. Based on the analyses on physical properties and tectonic characteristics of reservoirs, it is regarded that sublacustrine fan facies has favorable conditions for the formation of lithologic reservoirs. The reservoirs were formed in the semi-deep lake area in the periphery of braided river delta front, characterized by large sediment thickness, stable distribution, favorable reservoir physical properties, sufficient oil sources, good lateral and vertical migration channels for oil and gas, as well as short migration distance. These reservoirs are the main target of lithologic reservoir exploration and development in the semi-deep lake facies of sag slope area.

Key words: Jimsar sag, Wutonggou Formation, sublacustrine fan facies, Permian, distribution

中图分类号:

TE111.3

德勒恰提·加娜塔依, 张明玉, 陈春勇, 谭强, 李玲. 准噶尔盆地吉木萨尔凹陷东部二叠系梧桐沟组湖底扇沉积特征及展布[J]. 石油学报, 2015, 36(6): 688-698.

Deleqiat Janney, Zhang Mingyu, Chen Chunyong, Tan Qiang, Li Ling. Sedimentary characteristics and distribution of sublacustrine fan in Permian Wutonggou Formation,eastern Jimsar sag, Junggar Basin[J]. Acta Petrolei Sinica, 2015, 36(6): 688-698.

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准噶尔盆地吉木萨尔凹陷东部二叠系梧桐沟组湖底扇沉积特征及展布

Sedimentary characteristics and distribution of sublacustrine fan in Permian Wutonggou Formation,eastern Jimsar sag, Junggar Basin

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