莲花油层中粘土矿物分布规律研究  

The Study of Clay Minerals Distribution in Lianhua Reservoir

作　　者：唐洪明[1] 曾凡刚[2] 陈忠[1] 赵敬松[1] 沈明道[1] 唐清山[2] 柴利文[2] 魏桂萍[2] 

机构地区：[1]西南石油学院石工院,四川南充637001 [2]中央民族大学生物化学系,北京100081

出　　处：《沉积学报》2001年第2期233-238,共6页Acta Sedimentologica Sinica

基　　金：西南石油学院"油气藏地质及开发工程"国家重点实验室开放基金项目!(PLN0 1 1 4 )研究内容

摘　　要：辽河高升油田莲花油层富含稠油 ,搞清储层中粘土矿物的类型、含量、平面和纵向分布规律对整个稠油油藏开发方案的设计、油层保护、提高采收率等开发措施实施和稠油油藏形成条件等研究都具有极其重要的意义。本文利用X—衍射、电镜、热反应实验对高升油田莲花油层中的粘土矿物进行了系统研究。研究表明 ,莲花油层中的粘土矿物以蒙脱石为主 ,粘土矿物类型、含量分布主要受岩石类型和沉积相控制 ,含油饱和度大小对粘土矿物类型影响不大。蒸汽驱采油会导致储层中蒙脱石的含量减少 。The Lianhua reservoir of Shahejie group(geology period E1) in Gaosheng Oil field, located in Liaohe granen faulting basin, is rich in heavy crude oil, with the burial depth being 1 450～1 700 m.The reservoirs have been under development for 22 years. The company has made great profit from the reservoir development by means of steam flooding technology, but some problems have been found in the reservoir with the technology application, because the difficulty in reservoir development is increasing with the frequency of applying the technology. By the end of 1998 the average steam flooding for every well has been four times, but the more steam flooding, the less satisfactory the efforts to increase the production. Therefore, a more comprehensive study of the types, content, and the horizontal and vertical distribution characteristics of the clay minerals in the reservoir is of most important consequence to the design of the heavy crude oil development, reservoir protection, reservoir evaluation, and enhanced oil recovery (EOR) etc. The clay minerals in Lianhua reservoir are systematically studied by means of X ray diffraction, scan electronic microscope and heat simulation experiments. The Lianhua reservoir is a sediment by gravity flow, with the rock types being gravel, sandstone, and mudstone, and the sedimentary depth being 50～600 m. Lianhua reservoir has excellent physical property, with the porosity being 20%～26% and the permeability being 1～4 μm 2. The studies show that the major clay minerals in Lianhua reservoir are montmorillonite(60%～85%), illite (8%～20%), kaolinite (5%～25%), and chlorite (<5%). The montmorillonite content decreases with the increase of the burial depth, but the kaolinite and illite content are just the opposite, because the porosity fluid in sandstone and gravels more easily circulative than that in mudstone, and the montmorillonite in sandstone can more easily convert into other clays. For the study of the relationship between oil saturation and clay t

关 键 词：莲花油层 粘土矿物 蒸汽驱 沉积相 储层 分布规律 形成条件 稠油油藏 

分 类 号：P618.13[天文地球—矿床学] TE12[天文地球—地质学]