渤海海域沙垒田凸起西段花岗岩潜山优质储层形成控制因素及综合预测

发布时间：2018-01-29 11:51

  本文关键词： 花岗岩潜山 优质储层 成因分析 灰度能量属性 沙垒田凸起　出处：《中国石油勘探》2017年04期 　论文类型：期刊论文

【摘要】：为弄清低勘探程度区花岗岩潜山优质储层的分布特征,以地质模式为指导,利用刻画花岗岩风化壳效果明显的灰度能量属性,精细描述了渤海海域沙垒田凸起西段花岗岩优质储层的范围和厚度,综合分析构造活动、风化淋滤及古地温变化等因素对花岗岩储层的控制模式和分布特征的影响,探索了一套地质成因与地球物理相结合的预测方法。利用该方法对沙垒田凸起西段花岗岩潜山优质储层进行预测,研究结果表明:研究区花岗岩潜山长石等脆性矿物含量高,为优质储层的形成奠定了基础;断层两盘地层的错动引发诱导裂缝的发育,褶皱脊部的引张作用力促使高角度裂缝的发育,构造隆升引起的温压变化控制了近水平裂缝的发育;研究区西南缘为3类裂缝的叠加区,裂缝极为发育,且研究区西南缘长期接受风化淋滤作用,是花岗岩优质储层发育带。预测结果与实钻揭示的实际地质情况相符合,这说明地质成因与地球物理相结合研究方法能有效预测研究区优质储层的分布,为低勘探程度区花岗岩潜山优质储层预测提供参考。
[Abstract]:In order to understand the distribution characteristics of high quality granite buried hill reservoirs in low exploration area, the grayscale energy attribute which depicts the effect of granite weathering crust is used to depict granite weathering crust under the guidance of geological model. The range and thickness of the high quality granite reservoirs in the western section of the Shalieda uplift in Bohai Sea are described in detail, and the tectonic activities are comprehensively analyzed. The influence of weathering and leaching and paleogeothermal variation on the control pattern and distribution characteristics of granite reservoir. A set of prediction method combining geological genesis and geophysics is explored, which is used to predict the high quality reservoir of granite buried hill in the western section of Shalitian uplift. The results show that the content of brittle minerals such as granite buried hill feldspar in the study area is high, which lays a foundation for the formation of high quality reservoir. The development of induced fractures is caused by the dislocation of the two layers of the fault, the development of high angle fractures is promoted by the extensional force in the fold ridge, and the development of the near horizontal fractures is controlled by the variation of temperature and pressure caused by the uplift of the structure. The southwest edge of the study area is a superimposed area of three types of fractures, and the fracture is extremely developed, and the southwest edge of the study area has been subjected to weathering and leaching for a long time. The prediction results are consistent with the actual geological conditions revealed by real drilling, which indicates that the combination of geological genesis and geophysics can effectively predict the distribution of high quality reservoirs in the study area. It provides a reference for the prediction of high quality granite buried hill reservoir in low exploration level area.
【作者单位】： 中海油研究总院;
【基金】：国家科技重大专项“中国近海富烃凹陷优选与有利勘探方向预测”(2016ZX05024-002) 中国地质调查局“中国矿产地质与成矿规律综合集成和服务(矿产地质志)”(DD20160346)
【分类号】：P618.13
【正文快照】： 随着渤海油气勘探的不断深入,花岗岩潜山作为一种重要的油气储层,日益成为渤海油区增储上产的重要领域[1-6],但其储层非均质性强[7-13],勘探风险大,优质储层预测成为低勘探程度区花岗岩潜山评价的关键。花岗岩储层预测不同于碎屑岩,碎屑岩储层多为“相控”,其优质储层的分布与，

本文编号：1473349