西湖凹陷中北部绿泥石对储层发育的控制作用  

Controlling Effect of Chlorite on Reservoir Development in the North-central Xihu Depression

作　　者：席敏红 XI Minhong(SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司,上海200120

出　　处：《海洋石油》2023年第4期72-76,共5页Offshore Oil

摘　　要：近年来西湖凹陷中北部深层油气勘探获得重大突破,证实了深部储层的勘探前景,但深层储层的非均质性、复杂性是勘探面临的主要难题,落实优质储层发育的主控因素是提高勘探成功率的关键。该文在已有研究成果的基础上,通过大量的岩石薄片、扫描电镜、X衍射等实验室分析资料研究,重点分析了研究区绿泥石发育的控制因素及不同期次成因、绿泥石的作用效率及作用范围,探讨了对研究区深层优质储层发育起关键作用的绿泥石膜-残余粒间孔的成岩作用的反应机理,认为自生绿泥石膜对深层砂岩储层的成岩作用起建设性作用,通过抑制碎屑岩硅质胶结与压溶作用,促进了深层砂岩储层孔隙的保存。通过研究,明确了研究区深层存在优质储层发育的条件,对于该地区的油气勘探工作具有参考意义。In recent years,major breakthroughs have been made in deep oil and gas exploration in the North-central Xihu Depression,which confirms the prospect of deep reservoir exploration.However,the heterogeneity and complexity of deep reservoir are the main problems in exploration.The key to improve the success rate of exploration is to determine the main controlling factors of high-quality reservoir development.On the basis of the existing research results,through a large number of laboratory analysis data such as rock flakes,scanning electron microscopy and X-ray diffraction,this paper focuses on analyzing the controlling factors of chlorite development,the different sub-genesis,action efficiency and range of chlorite in the study area.The reaction mechanism of diagenesis of chlorite film-residual intergranular pores,which plays a key role in the development of deep high-quality reservoir in the study area is discussed.It is believed that authigenic chlorite film plays a constructive role in the diagenesis of deep sandstone reservoir,and promotes the preservation of deep sandstone reservoir pores by inhibiting the siliceous cementation and pressure dissolution of clastic rock.Through the research,the conditions for the development of high-quality reservoirs in the deep layer of the study area are defined,which is of reference significance for the oil and gas exploration in this area.

关 键 词：西湖凹陷 深部储层 绿泥石 成岩作用 反应机理 

分 类 号：P618.13[天文地球—矿床学]