塔里木盆地顺南-古隆地区深层奥陶系地温-地压特征与油气分布关系

发布时间：2018-04-17 16:46

本文选题：深层 + 奥陶系　；参考：《矿物岩石》2017年01期

【摘要】：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。
[Abstract]:The Tarim Basin, as a key area for marine carbonate exploration in China, has discovered a series of important oil and gas fields in recent years, and the onshore oil and gas exploration in China has been continuously expanded to the deep layer of 4500m.The characteristics of deep formation temperature and pressure are closely related to 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 synthesizing the static temperature data of 158 wells and mudstone compaction curves of 13 wells and the measured pressure data of 49 wells, the characteristics of geotemperature field and pressure field in Shunnan-Gulong area are analyzed in detail, and the relationship between them and Ordovician oil and gas reservoirs is discussed.The multiple tectonic activities in the eastern part of the Shuntogol uplift-Gucheng Hui uplift make the geothermal anomaly and the evolutional process of regional denudation-thermal events on the plane, the Ordovician local formation pressure anomaly in Shunnan area, and the natural gas is dominated by dry gas.It is suggested that tectonic compression and crude oil cracking may be the factors causing abnormal high pressure of reservoir.In Shunnan-Gulong area, there are two types of geotemperature and ground pressure systems, one is normal pressure type and the other is broken line type high pressure type, in which the high pressure type develops in the southern part of Shuntogol uplift, and the oil and gas mainly distribute at the top of the overpressure system longitudinally.The difference of thermal evolution in different structural zones affects the plane distribution of oil and gas reservoirs.The characteristics of temperature and pressure system indicate that the Ordovician deep high temperature and high pressure system in Shunnan-Gulong area has the potential to form large natural gas reservoirs.
【作者单位】：同济大学海洋与地球科学学院;中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所;中国石油化工股份有限公司西北油田分公司勘探开发研究院;
【基金】：国土资源部课题(14B12XQ2302) 中国石油化工股份有限公司科技开发部项目(P16090) 江苏省“双创计划”双创博士基金
【分类号】：P618.13

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