摘要
丘东洼陷是吐哈盆地台北凹陷深层致密砂岩油气勘探的接替领域。针对丘东洼陷多口水平井试采油气产量及含水率差异大,深层致密油气平面及纵向差异富集的因素不明等难题,基于勘探开发实践,利用地震、地球化学、分析测试等资料,系统开展了台北凹陷丘东洼陷三工河组致密砂岩油气富集主控因素研究。结果表明:①三工河组致密油气源于八道湾组煤系烃源岩和三工河组顶部湖相泥岩,湖相泥岩平面分布稳定,厚度20~40 m,既是烃源岩,又是一套良好的区域性盖层,与八道湾组煤系烃源岩及三工河组辫状河三角洲河道砂体形成“三明治”型源-储-盖(源)组合,具备较好的成藏条件;②三工河组断-缝体系为深层油气纵向、侧向运移提供有利通道,同时,有效改善深层致密砂岩储层物性,是深层致密砂岩油气富集关键因素;③三工河组顶部泥岩区域稳定发育,岩性较纯,为下部油气在三工河组储层富集保存提供良好盖层条件;④丘东洼陷近源斜坡区三工河组断-缝-盖体系发育,储层物性相对较好,是寻找深层致密砂岩油气藏有利区。该成果对吐哈盆地深层致密砂岩油气勘探具有重要指导意义。
The Qiudong Sub-sag is the replacement field for oil and gas exploration in the deep tight sandstone of the Taibei Sag in the Turpan-Hami Basin.In view of the problems such as large differences in oil and gas production and water content in the test production of multiple horizontal wells in the Qiudong Sub-sag and unknown factors for the horizontal and vertical differential enrichment of deep tight oil and gas,based on exploration and development practice,this study systematically investigates the main controlling factors for the enrichment of oil and gas in tight sandstone of the Sangonghe Formation in the Qiudong Sub-sag of the Taibei Sag with seismic,geochemical,analytical testing,and other data.The results show the followings.①The tight oil and gas of the Sangonghe Formation originate from the coal-measure source rocks of the Badaowan Formation and the lacustrine mudstone of the top of the Sangonghe Formation.The lacustrine mudstone has a stable plane distribution and a thickness of 20-40 m.It is source rocks and also a set of good regional caprocks,forming a sandwich-like source-reservoir-cap(source)combination with the coal-measure source rocks of the Badaowan Formation and the braided river delta channel sand bodies of the Sangonghe Formation,with good reservoir-forming conditions.②The Sangonghe Formation fault-fracture system provides favorable channels for vertical and lateral migration of deep oil and gas.At the same time,it effectively improves the physical properties of deep tight sandstone reservoirs and is a key factor in the enrichment of oil and gas in deep tight sandstone.③The mudstone area at the top of the Sangonghe Formation is stably developed,and the lithology is relatively pure,which provides good caprock conditions for the enrichment and preservation of oil and gas under it in the Sangonghe Formation reservoir.④The fault-fracture-cap system is developed in the Sangonghe Formation of the proximal slope of the Qiudong Sub-sag,and the physical properties of reservoirs are relatively
作者
陈旋
贾雪丽
王波
刘俊田
鲁宽
武超
田琳
姚宗森
CHEN Xuan;JIA Xueli;WANG Bo;LIU Juntian;LU Kuan;WU Chao;TIAN Lin;YAO Zongsen(PetroChina Tuha Oilfield Company,Hami,Xinjiang 839009,China;PetroChina Hanzhou Research Institute of Geology,Hangzhou,Zhejiang 310023,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2024年第6期26-38,共13页
China Offshore Oil and Gas
基金
中国石油天然气股份有限公司攻关性应用性科技专项“深地煤岩气成藏理论与效益开发技术研究(编号:2023ZZ18)”
中国石油天然气股份有限公司油气和新能源分公司科技项目“吐哈探区风险勘探领域和目标研究、工程技术攻关及现场试验(编号:2023YQXNCS001-09)”部分研究成果。
关键词
深层
致密砂岩
断-缝-盖
富集因素
三工河组
吐哈盆地
丘东洼陷
deep layer
tight sandstone
fault-fracture-cap
enrichment factors
Sangonghe Formation
Turpan-Hami Basin
Qiudong Sub-sag
