江汉盆地拖市油田低渗透油藏储层特征——古物理化学特征分析  

CHARACTERISTICS OF LOW PERMEABLE RESERVOIR IN TUOSHI OILFIELD IN JIANGHAN BASIN--ANALYSIS OF PALAEO-PHYSICAL AND CHEMICAL CHARACTERISTICS

作　　者：罗蛰潭[1] 倪师军[1] 王绪本[1] 

机构地区：[1]成都理工学院,四川成都610059

出　　处：《特种油气藏》1994年第1期8-14,共7页Special Oil & Gas Reservoirs

摘　　要：通过镜质体反射率积分法计算地层平均古地温梯度,实验测定硬石膏包裹体“均一”温度,应用声发射(AE)Kessier效应确定古构造应力场,由CO_2浓度法计算古流体压力(P_1);同时,对裂缝充填物进行了热释光与中子活化分析。研究结果表明,成岩过程中,硬石膏和方解石所处的温度、压力及化学环境接近或类似于现代储层物理、化学环境;裂缝中硬石膏脉体呈分接段沉淀特征;裂缝充填物质主要来自于泥岩。This paper calculates the average palaeogeothermal gradient of reservoir with the method of vitrinite reflectance integration as well as the palaeofluid pressure (PL)with the method of CO2 concentration and determines the 'homogeneous' temperature of anhydrite inclusion through experiments and the palaeostructural stress field using Kessier effect of acoustic emission(AE):meanwhile,thermoluminescence (TL)and neutron activation analysis is conducted as respects of fracture fillings. The results indicate that the temperature, pressure and chemical environment of anhydrite and calcite in the course of diagenesis are similar to modern physical and chemical reservoir environment; the anhydrite vein is charac terized by stage precipitation;the fracture fillings mainly come from mudstone.

关 键 词：低渗透储集层 包裹体 古地温 古压(应)力 中子活化分析 热释光 江汉盆地 拖市油田 

分 类 号：P618.13[天文地球—矿床学]