四川盆地侏罗系致密油形成条件、资源潜力与甜点区预测

doi:10.7623/syxb201707002

石油学报 ›› 2017, Vol. 38 ›› Issue (7): 740-752.DOI: 10.7623/syxb201707002

四川盆地侏罗系致密油形成条件、资源潜力与甜点区预测

李登华¹, 李建忠², 张斌², 杨家静³, 汪少勇²

1. 国土资源部油气资源战略研究中心北京 100034;
2. 中国石油勘探开发研究院北京 100083;
3. 中国石油西南油气田公司勘探开发研究院四川成都 610041

收稿日期:2016-11-24 修回日期:2017-05-25 出版日期:2017-07-25 发布日期:2017-08-10
通讯作者: 李登华,男,1972年11月生,1994年获同济大学海洋地质专业学士学位,2007年获中国石油勘探开发研究院矿产普查与勘探专业博士学位,现为国土资源部油气资源战略研究中心副研究员,主要从事油气资源评价和石油地质综合研究。Email:lidh@sinooilgas.org.cn
作者简介:李登华,男,1972年11月生,1994年获同济大学海洋地质专业学士学位,2007年获中国石油勘探开发研究院矿产普查与勘探专业博士学位,现为国土资源部油气资源战略研究中心副研究员,主要从事油气资源评价和石油地质综合研究。Email:lidh@sinooilgas.org.cn
基金资助:
国土资源部重大科技专项"全国油气资源动态评价"（2015YQKYQ01）和中国石油天然气股份有限公司重大科技专项"四川盆地侏罗系石油勘探开发关键技术研究"（2012E-2601）、"中国石油第四次油气资源评价"（2013E-0502）资助。

Formation condition,resource potential and sweet-spot area prediction of Jurassic tight oil in Sichuan Basin

Li Denghua¹, Li Jianzhong², Zhang Bin², Yang Jiajing³, Wang Shaoyong²

1. Strategic Research Center of Oil and Gas Resources, Ministry of Land and Resources, Beijing 100034, China;
2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
3. Institute of Exploration and Development, PetroChina Southwest Oil and Gas Field Company, Sichuan Chengdu 610041, China

Received:2016-11-24 Revised:2017-05-25 Online:2017-07-25 Published:2017-08-10

摘要/Abstract

摘要：

通过大量岩心、岩屑和原油样品测试分析，结合456口井的生产动态数据，明确了四川盆地侏罗系4套主要烃源岩的生烃潜力和3套主力产层的成藏特征，指出凉高山组、大安寨段和东岳庙段烃源岩以生油为主，珍珠冲段烃源岩以生气为主，富有机质烃源岩控制致密油甜点分布，工业油井绝大多数位于TOC>1.2%的优质烃源岩区，微米级孔喉是致密油有效储集空间，裂缝是开采初期高产的关键。四川盆地侏罗系致密油整体呈现油质轻、气油比高、异常高压的特点，有利于致密油流动和产出。采用小面元法、资源丰度类比法、EUR类比法和有机碳法4种方法，评价四川盆地侏罗系致密油地质资源量在（20~30）×10⁸t。通过资源富集主控因素分析，建立了四川盆地致密油地质资源评价分级标准，运用小面元法计算Ⅰ类地质资源量为16.11×10⁸t，Ⅱ类地质资源量为4.77×10⁸t，Ⅲ类地质资源量为2.89×10⁸t。预测大安寨段在南充-遂宁一带及梁平以东勘探潜力最大，凉高山组在广安-南充-遂宁-仪陇一带最为有利，东岳庙段在广安-遂宁一线以南具有较好的勘探前景。

关键词: 致密油, 形成条件, 地质特征, 甜点, 资源评价, 优质烃源岩

Abstract:

Through the test analysis of massive core, rock debris and crude oil samples in combination with the production performance data of 456 wells, the hydrocarbon generation potentials of four sets of chief source rocks are identified as well as the accumulation characteristics of three sets of major oil-producing layers. It is pointed out that the source rocks of Lianggaoshan Group, Da'anzhai Member and Dongyuemiao Member are dominant in oil generation, while those of Zhengzhuchong Member are dominant in gas generation. The organic-rich source rocks control the distribution of tight-oil sweet spots, and most of industrial oil wells are located in the high-quality source rock area with TOC value more than 1.2%. Micron-sized pore throats are the effective reserving space of tight oil, and the fractures play a key role in the initial high yield. Meanwhile, Jurassic tight oil in Sichuan Basin is wholly characterized by light oil, high gas-oil ratio and abnormal high-pressure, conductive to tight oil flow and output. Using four methods, including, small bin method, resource abundant analogy method, EUR analogy method and total organic carbon method, the geological resources of Jurassic tight oil in Sichuan Basin are evaluated to be (20-30)×10⁸t. Through analyzing the main control factors of resource enrichment, the geological resources evaluation rating criteria of tight oil in Sichuan Basin are established, and the small bin method is used to obtain the Class I geological resources of 16.11×10⁸t, the Class Ⅱ geological resources of 4.77×10⁸t and the Class Ⅲ geological resources of 2.89×10⁸t. It is predicted that Nanchong-Suining area and the east of Liangping are favorable exploration regions of Da'anzhai Member, Guang'an-Nanchong-Suining-Yilong area is the most favorable exploration zone of Lianggaoshan Group, and Dongyuemiao Member has a good exploration prospect in the south of Guang'an-Suining area.

Key words: tight oil, formation conditions, geological characteristics, sweet spot, resource assessment, high-quality source rock

中图分类号:

TE122.3

李登华, 李建忠, 张斌, 杨家静, 汪少勇. 四川盆地侏罗系致密油形成条件、资源潜力与甜点区预测[J]. 石油学报, 2017, 38(7): 740-752.

Li Denghua, Li Jianzhong, Zhang Bin, Yang Jiajing, Wang Shaoyong. Formation condition,resource potential and sweet-spot area prediction of Jurassic tight oil in Sichuan Basin[J]. Acta Petrolei Sinica, 2017, 38(7): 740-752.

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四川盆地侏罗系致密油形成条件、资源潜力与甜点区预测

Formation condition,resource potential and sweet-spot area prediction of Jurassic tight oil in Sichuan Basin

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