普光气藏储层流体特征及其演化过程  

Characteristic and Evolution Process of Fluid in Puguang Gas Reservoir

作　　者：傅太宇 李葆华[1] 顾雪祥[2] 付绍洪[3] 徐仕海[1] 董晓燕[1] 许龙[1] 吴大伟[1] 

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]中国地质大学(北京)地质过程与矿产资源国家重点实验室,北京100083 [3]中国科学院地球化学研究所,贵阳550002

出　　处：《地质科技情报》2016年第1期134-139,共6页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41372094)

摘　　要：为了研究普光气藏储层流体的演化过程，对气藏包裹体进行了显微观察和显微测温研究。结果表明：普光气藏储层流体包裹体可划分为3期，即成岩早期（第1期），成岩晚期早阶段（第Ⅱ期）和成岩晚期晚阶段（第Ⅲ期）。第1期以气液水包裹体和液相水包裹体为主，均一温度为85～117℃，盐度（叫B）为15．55％～20．43％，属于浅埋藏环境；第Ⅱ期包裹体类型有含沥青气相烃包裹体、残余沥青包裹体和气液水包裹体，含沥青气相烃包裹体及残余沥青包裹体是由液相烃包裹体、气一液烃包裹体热裂解而成的，该期包裹体均一温度为116～168℃，盐度为4．94％～19．95％，为中一深埋藏环境；第Ⅲ期包裹体主要为气相烃、烃一水包裹体和气液水包裹体，均一温度为133～250℃，盐度为4．48％～21．05％，属深埋藏环境。从第Ⅰ期到第Ⅲ期随着埋深的增加，均一温度依次升高，盐度大致呈降低的趋势。This paper studies the evolution process of Puguang gas reservoir based on the microscopic ob- servations and the micro thermometry measurement of its inclusions. The result shows that the inclusions are formed in three phases, respectively： the early period of diagenesis（inclusions of period Ⅰ ）, the early stage in the late period of diagenesis （inclusions of period Ⅱ ）,and the late stage in the late period of dia- genesis（inclusions of period Ⅲ）. In period Ⅰ , they are mainly the gas-liquid H2O inclusions, with the homogenization temperature ranging from 85℃ to 117℃, and the salinity 15.55%-20.43%, belonging to shallow buried environment. In period Ⅱ , there are gas-liquid H2O inclusions,gas hydrocarbon inclusions containing bitumen and residual bitumen inclusions. The latter two are thermal cracked from Liquid phase hydrocarbon inclusions, gas-liquid hydrocarbon inclusions. The homogenization temperature gas-liquid H2O inclusions range from 116℃ to 168℃, and the salinity is 4.94%-19.95%, belonging to middle-deep buried environment. In period Ⅲ, inclusions are mainly hydrocarbon inclusions, hydrocarbon-H2O inclu- sions and gas-liquid H2O inclusions, with the homogenization temperature ranging from 133℃ to 250℃, and a wide range of salinity：4.48%-21.05%, corresponding to the dry gas stage,belonging to deep burial environment. From stage Ⅰ to stage Ⅲ, with the increase of depth and evolution, the homogenization temperature increased gradually and the salinity showed a decreasing trend.

关 键 词：普光气藏 包裹体岩相学特征 显微测温 储层流体演化过程 

分 类 号：TE311.1[石油与天然气工程—油气田开发工程]