油水过渡带发现整装油藏的启示——以准噶尔盆地西缘春风油田西南部排691块为例  

Discover integrity reservoir pointer of oil-water transitional zone: A case study of southwest Chunfeng Oilfield P691 block in western margin of Junggar Basin

作　　者：王学忠 乔明全 Wang Xuezhong;Qiao Mingquan(XinjiangXinchun Oil Company, Sinopec, Dongying, Shandong 257000, China)

机构地区：[1]中石化新疆新春石油开发有限责任公司

出　　处：《非常规油气》2019年第5期109-114,共6页Unconventional Oil & Gas

基　　金：国家科技重大专项“准噶尔盆地碎屑岩层系大中型油气田形成规律与勘探方向”(2011ZX05002-002);胜利油田科技项目“浅层超稠油油藏HDNS开发技术研究”(YKY1107)联合资助

摘　　要：继准噶尔盆地西缘春风油田规模开发和薄浅层储层预测技术成熟之后,通过老井复查、细分小层、精细地层对比和沉积相展布特征研究,突破了该区钻遇一个薄油层、南部油水过渡带开发潜力很小的固有认识,形成春风油田西南部地区沙湾组一段物源来自南部的三角洲沉积、储层厚度自南向北厚度减薄、易于形成水进退积上倾尖灭油藏的新认识。在加强地震与地质融合基础上,以沉积相模式为指导,积极寻找单砂体上倾尖灭油气藏。排691块N1s21完钻了6口探井,3口井蒸汽吞吐后获商业油流,迅速探明一个千万吨级浅层整装稠油油藏。其成藏模式:沙湾凹陷二叠系烃源岩供烃、调整后再聚集、骨架砂岩与不整合面横向输导、断层纵向输导、前缘砂体上倾尖灭成藏,油气富集在远源体系砂体的上倾尖灭带、砂体内部的断层遮挡区和近源体系的扇体中。After scale development and ripe thin shallow reservoir prediction technology in Chunfeng Oilfield in the western margin of Junggar Basin, from old well reexamination, sub-members, fine formation correlation and facies sand distribution, which breakthrough the old understanding:which has multiple sets of sand body development zone in this area, there is smaller potential of exploration and development in oil-water transition zone.Formed a new perspective :provenance of southwest of N 1 s 1 in Chunfeng Oilfield from Southern deltaic deposits, Thickness of Reservoir thinned from south to north, easy to form transgressive updip pinchout reservoir. On the basis of strengthening seismic and geological fusion,guided by the sedimentary facies model,looking for single sandbody upward pinchout reservoir. P691 block N 1 s 2 1 deployment 6 exploratory wells, which 3 exploratory wells steam huff and puff obtained commercial oil flow. and quickly proved a ten-million-ton integrated shallow heavy oil reservoir. Its accumulation pattern:Shawan Sag Permian source rocks-supply, re-accumulation after adjustment, skeletal sand body and unconformity interface hydrocarbon lateral migration, vertical conduction of faults, front subfacies sandbody upward pinchout reservoir, oil and gas enrichment in distal system sandbody updip pinch-out sandstone, sand-body internal faults shielding region and near-source Fan.

关 键 词：油水过渡带 整装油藏 老井复查 浅层超稠油 春风油田 

分 类 号：P631.4[天文地球—地质矿产勘探]