苏里格地区石炭-二叠系天然气充注特点及充注能力  

Characteristics and potential of gas charging in the Permo-Carboniferous of Sulige region

作　　者：陈义才[1] 林杭杰[1] 唐波[1] 赵鹤森[1] 魏新善[2] 刘新社[2] 赵惠涛[2] 

机构地区：[1]成都理工大学,四川成都610059 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710021

出　　处：《石油与天然气地质》2011年第1期91-97,共7页Oil & Gas Geology

基　　金：国家杰出青年基金项目(40602012)

摘　　要：苏里格地区石炭-二叠系烃源岩广泛分布。在区域构造平缓和储层物性普遍较差的背景下,天然气二次运移以气体膨胀驱动为主。天然气充注能力的大小不仅取决于烃源岩的有效排气量,而且与被充注的储层厚度及储层孔隙度有关,从而提出用储层天然气充注指数定量评价天然气的充注能力。参考储层气、水两相渗流实验分析结果,确定储层天然气强充注、中等充注和弱充注的储层天然气充注指数评价标准。苏里格地区石炭-二叠系天然气有效充注主要发生在石炭系本溪组-二叠系盒8段之间,储层天然气充注指数在多数地区为0.4~0.6,总体上属于中等-强充注。The Permo-Carboniferous source rocks are widely distributed in the Sulige region.With a flat regional structural relief and poor reservoir poroperm characteristics as background,the secondary migration of gas in the region is mainly driven by gas expansion.Gas charging potential is not only depended on the amount of gas expelled from the source rocks but also closely related to the thickness and porosity of the reservoirs to be charged.The author therefore proposes in the paper a quantitative method for gas charging potential evaluation by using reservoir charging index（RCI）.Experimental results of two phase（gas-water） flow were also used to determine the evaluation standards of RCI at high,mediocre and low gas charging potentials respectively.For the Permo-Carboniferous in Sulige Region,effective gas charging mainly occurs between the Carboniferous Benxi Formation and the 8th member of the Permian Shihezi Formation.Their RCI values are in the range from 0.4 to 0.6,indicating a medium to high gas charging potential as a whole.

关 键 词：储层 气体膨胀 储层天然气充注指数 石炭-二叠系 苏里格气田 

分 类 号：TE122.1[石油与天然气工程—油气勘探]