油气勘探新理念及其在准噶尔盆地的实践成效  

New concepts for deepening hydrocarbon exploration and their application effects in the Junggar Basin, NW China

作　　者：赵文智[1] 胡素云[1] 郭绪杰 李建忠[1] 曹正林[1] ZHAO Wenzhi;HU Suyun;GUO Xujie;LI Jianzhong;CAO Zhenglin(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;PetroChina Exploration and Production Company,Beijing 100007,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油勘探与生产分公司,北京100007

出　　处：《石油勘探与开发》2019年第5期811-819,共9页Petroleum Exploration and Development

基　　金：国家科技重大专项“岩性地层油气藏成藏规律、关键技术及目标评价”(2017ZX5001)

摘　　要：准噶尔盆地是中国陆上主要含油气盆地之一,油气资源丰富。2010年前后,受地质认识和勘探技术制约,面临西北缘“跳出断阶带,走向斜坡区”石油勘探徘徊不前、腹部“寻找下一个大型岩性地层油气藏”久攻不克,以及天然气勘探继克拉美丽气田发现后再无重大突破的窘境,寻找大油气田方向与目标不明朗。以富油气凹陷“满凹含油”理论为指导,基于对盆地油气成藏条件与特征的长期研究和思考,先后提出西北缘斜坡区存在古冲断带“二台阶”、盆地区存在6大“迎烃面”,以及找气潜力值得高度重视等新理念,对推动准噶尔盆地玛湖1井、盐北1井的突破以及玛湖凹陷二叠系、三叠系10×10^8 t级油区建设等都有指导作用。天然气勘探也展现出好苗头,逼近富油气凹陷高熟气源灶部署的阜26、高探1和前哨2井相继获天然气勘探新发现,指明了盆地深化勘探寻找大中型气田的方向。The Junggar Basin is one of the major petroliferous basins with abundant oil and gas resources in onshore China. Around 2010 and thereafter, the hydrocarbon exploration for finding giant fields in the basin faced tough difficulties: in the northwestern margin area, no significant breakthrough has been made for long since seeking to 'escape from the step-fault zone and extend to the slope area';in the central part, the exploration for large lithologic-stratigraphic reservoirs stood still;since the discovery of the Kelameili gas field, no important achievement has been made in gas exploration. Under the guidance of 'whole sag-oil-bearing' theory in the petroliferous basin, and based on the long-term study and thinking of the petroleum accumulation conditions and characteristics, the authors proposed several new concepts, i.e., a 'thrust-induced second-order fault step' hiding under the northwestern slope area;six 'hydrocarbon migrationward surfaces' favorable for hydrocarbon accumulation;promising natural gas resource. These concepts have played an important role in the discoveries of Wells Mahu1 and Yanbei1 as well as the confirmation and expansion of Permian-Triassic billion-ton-scale petroliferous areas in Mahu. The fairway of new discoveries has also appeared for natural gas exploration in Wells Fu26, Gaotan1 and Qianshao2, suggesting that the surrounding regions of the highly matured source kitchen are of high possibility to form gas accumulations.

关 键 词：二台阶 迎烃面 有利相带 岩性地层油藏 满凹含油 天然气 潜力与方向 准噶尔盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]