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塔里木盆地作为中国海相碳酸盐岩油气勘探的重点区域,近年来发现了一系列重大油气田,中国陆上油气勘探不断向深层(>4 500m)拓展,深层地层温压特征与油气藏分布规律息息相关,而深层气藏的高温高压加大了勘探开发的难度。通过综合158口井试油静温数据、13口井泥岩压实曲线和49口井实测压力资料,详细分析顺南-古隆地区地温场、地压场特征,并探讨其与奥陶系油气藏的关系,研究认为,顺托果勒隆起-古城墟隆起东部地区的多期构造活动使得地温异常,平面上经历区域性的剥蚀-热事件演化过程;顺南地区奥陶系局部地层压力异常,天然气以干气为主,具有一定的原油裂解气的特征,并提出构造挤压和原油裂解可能是造成储层异常高压的因素。顺南-古隆地区发育单一式常压型和折线式高压型两类地温-地压系统,其中高压型发育于顺托果勒隆起南部,油气纵向上主要分布在超压系统顶部,不同构造带热演化差异影响油气藏平面展布。温压系统特征表明,顺南-古隆地区奥陶系深层高温高压系统具备形成大型天然气藏潜力。
Tarim Basin, a key oil and gas exploration area for marine marine carbonate in China, has discovered a series of major oil and gas fields in recent years. The onshore oil and gas exploration in China continues to expand to deep (> 4 500m) depths, the features of temperature and pressure and the distribution of oil and gas reservoirs And the high temperature and pressure of deep gas reservoirs increase the difficulty of exploration and development. By comprehensively analyzing 158 oil well test data, 13 mudstone compaction curves and 49 measured pressure data, the characteristics of geothermal field and pressure field in Shunnan-Gulong area are analyzed in detail and their relationships with Ordovician oil and gas The study suggests that the Shuntenguerle uplift - the multi-phase tectonic activity in the eastern part of the ancient city ruins uplifted the anomalous geothermal anomalies, and experienced the regional erosion-thermal event evolution on the plane. The Ordovician local stratigraphic pressure anomalies Natural gas is mainly dry gas, which has the characteristics of certain crude oil pyrolysis gas. It is also suggested that tectonic extrusion and crude oil cracking may be the factors that cause abnormally high pressure in the reservoir. There are two types of geotemperature and geostress systems in Shunnan-Gulong area: single-pressure type and fold-line pressure type, of which the high-pressure type is developed in the southern part of Shuntuo-Gloria Uplift and the hydrocarbon is mainly distributed in the top of overpressure system in vertical direction. Differences in thermal evolution affect reservoir distribution. The characteristics of the warm pressing system show that Ordovician deep high temperature and high pressure system in Shunnan-Gulong area has the potential to form a large natural gas reservoir.