准噶尔盆地温压系统演化与油气远源成藏

发布时间：2018-04-20 09:35

本文选题：温压系统 + 温度场　；参考：《石油实验地质》2017年04期

【摘要】：准噶尔盆地温压系统的形成与演化对油气远源成藏具有明显的控制作用。以系统热力学理论为指导,在盆地温度场和压力场分析基础上,系统研究了盆地温压系统的特征、演化及其对油气远源成藏的控制作用。研究表明盆地隆起区具有高地温、高地温梯度和高大地热流的特征,坳陷区则相反;坳陷区普遍发育超压,并向盆地边缘呈不规则环状降低,盆地南部及腹部坳陷区发育强超压,盆地东部次之,西北缘以弱超压为主。垂向上盆地发育P-T3、J1-J1s和K1tg-E2-3a三套相对封闭的温压系统。海西期盆地沉降速率较快,P-T3期温压系统超压积聚;至燕山期构造运动强烈,凸起边缘切穿盖层的断裂活动频繁,地层温压场调整,油气突破盖层运移与聚集,是该区远源油气藏形成的主要时期;喜马拉雅期盆地主要为南降北升的掀斜运动,断裂活动微弱,相对封闭性温压系统的发育使油气保存条件优越。平面上远源岩性油气藏主要分布在盆地西北缘、莫北莫索湾地区、陆梁隆起及东部隆起等低温压场区,是准噶尔盆地远源油气藏勘探的有利区。
[Abstract]:The formation and evolution of temperature-pressure system in Junggar Basin have obvious controlling effect on oil and gas reservoir formation. Based on the theory of system thermodynamics and the analysis of temperature field and pressure field in the basin, the characteristics, evolution and controlling effect of the temperature and pressure system on the formation of oil and gas are studied systematically. The study shows that the uplift area of the basin has the characteristics of high geothermal temperature, high geothermal gradient and high geothermal flux, whereas the depression area is opposite. Strong overpressure developed in the southern part of the basin and the abdominal depression, followed by the eastern part of the basin, and the weak overpressure dominated in the northwest margin. Three sets of relatively closed temperature and pressure systems, P-T _ 3N _ J _ 1-J _ 1s and K1tg-E2-3a, have been developed in the vertical basin. The subsidence rate of Hercynian basin is faster than that of P-T3 period, and the accumulation of overpressure in P-T3 period, the strong tectonic movement in Yanshanian period, the frequent fracture activity of cutting through the caprock at the uplift margin, the adjustment of formation temperature and pressure field, the migration and accumulation of oil and gas through the caprock. The Himalayan basin is mainly an uplift movement from the south to the north with weak fault activity and superior preservation conditions due to the development of the relatively closed system of temperature and pressure. The remote lithologic reservoirs are mainly distributed in the northwestern margin of the basin, Mobei Mosuowan area, Luliang uplift and eastern uplift, and are favorable areas for exploration of the far source reservoirs in Junggar Basin.
【作者单位】：山东科技大学地球科学与工程学院;
【基金】：国家自然科学基金(41172108) 国家油气重大专项(2016ZX05041005,2016ZX05001003)资助
【分类号】：P618.13

【相似文献】