鄂尔多斯盆地甘泉—富县地区长7烃源岩地球化学特征

doi:10.3969/j.issn.1673-8926.2018.01.004

岩性油气藏 ›› 2018, Vol. 30 ›› Issue (1): 39–45.doi: 10.3969/j.issn.1673-8926.2018.01.004

鄂尔多斯盆地甘泉—富县地区长7烃源岩地球化学特征

袁媛, 杜克锋, 葛云锦, 吴凤, 宋健

陕西延长石油(集团)有限责任公司研究院, 西安 710069

收稿日期:2017-08-10 修回日期:2017-10-09 出版日期:2018-01-21 发布日期:2018-01-21
第一作者:袁媛(1987-),女,硕士,工程师,主要从事石油地质研究工作。地址:(710069)陕西省西安市太白北路229号西北大学313信箱。Email:523509365@qq.com。
基金资助:
陕西延长石油（集团）有限责任公司研究院科研专项“甘泉—富县有利区预测”（编号：YCSY2016 KY-A-07）资助

Geochemistry of hydrocarbon source rocks of Chang 7 in Ganquan-Fuxian area,Ordos Basin

YUAN Yuan, DU Kefeng, GE Yunjin, WU Feng, SONG Jian

Research Institute of Shaanxi Yanchang Petroleum(Group) Co., Ltd., Xi'an 710069, China

Received:2017-08-10 Revised:2017-10-09 Online:2018-01-21 Published:2018-01-21

摘要/Abstract

摘要： 鄂尔多斯盆地甘泉—富县地区是延长油田致密油主要发育区，为了解决延长组长7油层组致密油资源潜力不清、富集规律不明、勘探开发风险大等问题，利用岩心和测井资料，研究了长7暗色泥岩的分布特征，并通过烃源岩总有机碳、烃源岩热解参数、氯仿沥青“A”族组成、镜质体反射率（R_oc）等的分析测试，评价了长7烃源岩的生烃潜力。结果表明：烃源岩有机质丰度高，主要为Ⅰ和Ⅱ₁型，有机质热演化程度普遍达到成熟生油阶段，生油潜力大，总体评价为较好—好烃源岩；烃源岩的分布明显受沉积格局控制，靠近湖盆中心的深湖—半深湖沉积区的西北部是长7烃源岩的主要发育区，厚度为50～70 m，可作为下一步致密油勘探的重点区域。该研究成果对类似地区的烃源岩地球化学特征、生烃潜力评价、预测油气有利区具有指导作用。

关键词: 地质知识库, 多点地质统计学, 地质建模, 致密砂岩气藏, 苏里格气田

Abstract: Ganquan-Fuxian area is a main enrichment area of tight oil in Yanchang Oilfield,Ordos Basin,however, the resource potential and enrichment law are unclear,and the exploitation risk is large. The data of cores and logging were used to study the distribution of Chang 7 source rocks,and the total organic carbon,pyrolysis,chloroform bitumen "A" and vitrinite reflectance(R_oc)were analyzed to evaluate the hydrocarbon-generating potentials of Chang 7 source rocks. The results show that the organic matter is mainly of Ⅰ and Ⅱ 1 type and in a maturate oil generation stage,with great hydrocarbon-generating potential,which is determined to be relatively good source rocks. The thickness and organic matter abundance of Chang 7 source rocks are controlled by sedimentary environment. The Chang 7 source rocks are mainly distributed in northwestern deep to semi-deep lake sedimentary area near the center of the lake basin,with the thickness of 50-70 m,which can be the key area for the next tight oil exploration. The research result is helpful for guiding the evaluation of hydrocarbon geochemical characteristics and hydrocarbon generation potential and the prediction of favorable oil and gas areas.

Key words: geological knowledge database, multiple-point geostatistics, geological modeling, tight sandstone gas reservoir, Sulige Gas Field

中图分类号:

TE122.1+13

袁媛, 杜克锋, 葛云锦, 吴凤, 宋健. 鄂尔多斯盆地甘泉—富县地区长7烃源岩地球化学特征[J]. 岩性油气藏, 2018, 30(1): 39–45.

YUAN Yuan, DU Kefeng, GE Yunjin, WU Feng, SONG Jian. Geochemistry of hydrocarbon source rocks of Chang 7 in Ganquan-Fuxian area,Ordos Basin[J]. Lithologic Reservoirs, 2018, 30(1): 39–45.

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鄂尔多斯盆地甘泉—富县地区长7烃源岩地球化学特征

Geochemistry of hydrocarbon source rocks of Chang 7 in Ganquan-Fuxian area,Ordos Basin

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