塔里木盆地地温场对油气成藏过程的控制作用——以古城墟隆起为例

发布时间：2018-03-22 03:12

本文选题：地温场　切入点：热蚀变　出处：《石油学报》2017年05期 　论文类型：期刊论文

【摘要】：塔里木盆地是中国海相碳酸盐岩油气勘探的重点区域,近几年中国石油化工股份有限公司在古城墟隆起西段奥陶系天然气勘探获得较大突破,但气藏的高温高压加大了勘探开发难度,且油气性质使得富集规律更为复杂。通过对地温场、油气碳同位素特征以及油气成藏过程剖析,认为古城墟隆起的多期构造活动使得地温异常,平面上具有剥蚀-热事件的差异演化;原油海西中—晚期聚集成藏,经历高温热蚀变,原油组分碳同位素变重;天然气为高成熟度干气,具有一定的原油裂解气的特征,喜马拉雅期聚集成藏;SHN1井成藏过程表征了热液对碳酸盐岩储层的建设作用和对油气的破坏与建设双重作用,使得奥陶系碳酸盐岩层系具有形成大型天然气藏的潜力。
[Abstract]:The Tarim Basin is a key area for marine carbonate oil and gas exploration in China. In recent years, China Petroleum and Chemical Co., Ltd. has made a great breakthrough in the exploration of Ordovician natural gas in the western section of Gucheng Hui uplift. However, the high temperature and high pressure of the gas reservoir increase the difficulty of exploration and development, and the enrichment law is more complicated due to the oil and gas properties. Through the analysis of the geothermal field, the characteristics of hydrocarbon carbon isotopes and the process of oil and gas accumulation, It is considered that the multi-stage tectonic activity of the ancient city market uplift makes the geothermal anomaly and the differential evolution of denudation-thermal events on the plane, and that the middle and late Hercynian crude oil accumulates to form reservoirs, which undergo high temperature thermal alteration, and the carbon isotopes of the crude oil components become heavier. Natural gas is a dry gas with high maturity and has the characteristics of crude oil cracking gas. The process of accumulation and formation of SHN1 well in Himalayan stage indicates the effect of hydrothermal solution on the construction of carbonate reservoir and the destruction and construction of oil and gas. The formation of Ordovician carbonate rocks has the potential to form large natural gas reservoirs.
【作者单位】：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、P15115)资助
【分类号】：P618.13

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