准噶尔盆地东部台13井区八道湾组水流及砂体延伸方向
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摘要
准噶尔盆地北三台油田台13井区目前在八道湾组发现有油,展示该区有良好的油气勘探前景。但由于构造复杂、地震资料品质差、钻井少、砂砾岩储集层延伸展布方向预测难度大,给油田井位部署和高效开发造成了很大障碍。前人根据少量钻井资料编制的砂体等厚图,推测其古水流方向是从南向北,物源来自其南部的博格达山。据此,结合附近露头研究、钻井资料和区域地质背景,对该区古水流方向和砂体延伸方向进行了研究。结果表明,台13井区八道湾期,古水流方向是从北东向南西,河道砂体呈北东-南西向延伸,物源应来自准噶尔盆地东部的奇台凸起。
Well Tai-13 area in North Santai field in Junggar basin is located in east part of Fudong fault belt near Bogeda mountain, belonging to piedmont thrustfault belt. At present, oil is found in Badaowan formation, showing good prospect for petroleum exploration in this area. However, this area is characterized by complex structure, poor seismic data quality, few drilling well, difficult prediction of glutenite reservoir extension direction, so these give rise to big barriers for well location deployment and effective development in this field. Based on fewer drilling data, previous researchers plotted the sand body isopach map, predicting that its paleocurrent direction was from the south to the north, the source came from Bogeda mountain in its south. According to these, integrated with vicinal outcrop studies, drilling data and regional geologic setting, the paleocurrent direction and sand body extending direction are studied in this paper. The results show that in period of Badaowan formation in Well Tai-13 area, the paleocurrent direction was trending from NE to SW, the channel sands extending from NE to SW; the source should come from Qitai swell in eastern Junggar basin.
Well Tai-13 area in North Santai field in Junggar basin is located in east part of Fudong fault belt near Bogeda mountain, belonging to piedmont thrustfault belt. At present, oil is found in Badaowan formation, showing good prospect for petroleum exploration in this area. However, this area is characterized by complex structure, poor seismic data quality, few drilling well, difficult prediction of glutenite reservoir extension direction, so these give rise to big barriers for well location deployment and effective development in this field. Based on fewer drilling data, previous researchers plotted the sand body isopach map, predicting that its paleocurrent direction was from the south to the north, the source came from Bogeda mountain in its south. According to these, integrated with vicinal outcrop studies, drilling data and regional geologic setting, the paleocurrent direction and sand body extending direction are studied in this paper. The results show that in period of Badaowan formation in Well Tai-13 area, the paleocurrent direction was trending from NE to SW, the channel sands extending from NE to SW; the source should come from Qitai swell in eastern Junggar basin.
引文
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