济阳坳陷惠民凹陷中央隆起带与邻区黏土矿物成岩演化及古地温变化

发布时间：2017-12-27 09:30

本文关键词：济阳坳陷惠民凹陷中央隆起带与邻区黏土矿物成岩演化及古地温变化　出处：《天然气地球科学》2016年10期 　论文类型：期刊论文

【摘要】：惠民凹陷中央隆起带是胜利油田重要的油气富集带,对其成岩演化及古地温研究有助于进一步弄清该构造带的地质作用过程。选取了中央隆起带及临南洼陷带沙河街组大量样品,通过X-射线衍射、电子探针等进行黏土矿物成分分析及古地温计算,结果表明:该区沙河街组黏土矿物主要为高岭石、伊/蒙混层、伊利石和绿泥石,总体反映黏土矿物演化程度不高,盆地热演化程度较低的特点;成岩作用基本处于中成岩阶段,可进一步划分为早期和晚期2个阶段,早期主要是无序伊/蒙混层矿物(伊利石含量=38.2%~60.3%);晚期是有序伊/蒙混层矿物(伊利石含量=60.3%~82.4%)。在中央隆起带,早期和晚期的转换深度界线大致为1 700m,而在临南洼陷带该界线大致为2 600m;中央隆起带沙二段(Es_2)矿物热演化程度明显低于洼陷带,表明中央隆起带可能在沙二段沉积期开始了快速抬升,形成了与洼陷带不同的成岩环境;洼陷带沙河街组古地温梯度为40.8℃/km,中央隆起带的古地温梯度计算结果明显异常(76.72℃/km),表明该构造带遭受了强烈抬升与剥蚀作用,剥蚀量大约为880m。
[Abstract]:The central uplift belt of Huimin sag is an important oil and gas accumulation zone in Shengli Oilfield. Its diagenetic evolution and paleotemperature research will help further clarify the geological process of the tectonic belt. The central uplift belt and Linnan depression belt of Shahe Street group of a large number of samples by X- ray diffraction and electron microprobe analysis of clay mineral composition and paleo temperature calculation, the results show that the district Shahe Street group of clay minerals including kaolinite, illite / smectite, illite and chlorite, generally reflect the degree of clay minerals evolution is not high, the characteristics of the thermal evolution of the basin with low degree; diagenesis basically in the diagenetic stage, can be further divided into early and late 2 stages, the early mainly disordered illite montmorillonite (=38.2%~60.3% illite content); late ordered illite montmorillonite (=60.3%~82.4% illite content). In the central uplift belt, conversion of early and late depth line is approximately 1 700m, while in the Linnan sag with the boundary is approximately 2 600m; Sha two section in the central uplift belt (Es_2) mineral thermal evolution degree was significantly lower than that of sag zone, central uplift may start rapid uplift during the deposition period of two sand with the formation of sag, different diagenetic environment; Shahe Street Group paleogeothermal gradient sag is 40.8 DEG /km, paleogeothermal gradient of the central uplift calculation results significantly abnormal (76.72 degrees /km), that has been subjected to intense uplift and denudation in the tectonic belt, erosion was about 880m.
【作者单位】：国土资源部金矿成矿过程与资源利用重点实验室;山东省金属矿产成矿地质过程与资源利用重点实验室;山东省沉积成矿作用与沉积矿产重点实验室山东科技大学;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;山东科技大学化学与环境工程学院;
【基金】：山东省自然科学基金项目“济阳坳陷惠民—东营凹陷中央隆起带差异隆升机制研究”(编号:ZR2013DM007) 国土资源部金矿成矿过程与资源利用重点实验室和山东省金属矿产成矿地质过程与资源利用重点实验室项目(编号:2013006)联合资助
【分类号】：P618.13
【正文快照】： 2.山东省金属矿产成矿地质过程与资源利用重点实验室,山东济南250013;3.山东省沉积成矿作用与沉积矿产重点实验室,山东科技大学,山东青岛266590;4.海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266071;5.山东科技大学化学与环境工程学院,山东青岛266590)sion[

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