满南地区中-上奥陶统生物礁地震解释及其含油气性

在塔里木盆地满南地区的地震剖面上,中-上奥陶统有一种类似背斜形态的丘状异常反射,曾被认为是沉积过程中形成的岩隆,但与塔北中-上奥陶统生物礁及国内外生物礁的地震反射特点对比后确认,该丘状异常反射为生物礁的反映.礁属枢纽带碳酸盐岩沉积体系的台地边缘堤礁,礁后发育滩,礁前缘发育倒石锥,礁体宽2～4km,东西方向延伸90km,呈S形展布,与塔北中-上奥陶统生物瞧构成马蹄形礁群,礁体最大厚度可达500m,礁体储集性能良好.满南礁体将是今后盆地油气勘探的一个重要目标.

SEISMIC INTERPRETATION AND PRESENCE OF HYDROCARBON OF MID-UPPER ORDOVICIAN REEF IN MANNAN AREA. XJPG,

Mound seismic anomaly with resemblance to anticline has been identified in seismic profile of Mid-Upper Ordovician over Mannan area of Tarim basin, which was interpreted previously as buildup formed in sedimentary process. However, reef was widely accepted following comparism with seismic reflection characteristics of reef in Mid-Upper Ordovician of Tabei area and elsewhere in the world. The reef belonged to platform marginal barrier reef of carbonate sedimentary system in hinge zone, extending 90 km from east to west with width of 2 ~ 4 km, distributed "S" type along with the reef of Mid-Upper Ordovician. It formed the horseshoe-shaped reef group in Tabei area, with the thickness up to 500 m and good reservoir quality. The reef in Mannan area should be an important target for oil and gas exploration in the future.