澳大利亚博文盆地中部地区煤层气富集主控因素分析

被引：9

作者：

俞益新 ^{[1
]}

吴晓丹 ^{[1
]}

谷峰 ^{[1
]}

唐颖 ^{[1
]}

石雪峰 ^{[2
]}

机构：

[1] 中海石油气电集团有限责任公司技术研发中心

[2] 中海油能源发展股份有限公司工程技术分公司

来源：

资源与产业 | 2017年 / 19卷 / 02期

关键词：

博文盆地; 煤层气; 主控因素; 含气性; 构造条件; 保存条件;

D O I：

10.13776/j.cnki.resourcesindustries.20170323.013

中图分类号：

P618.13 [石油、天然气];

学科分类号：

0709 ; 081803 ;

摘要：

澳大利亚博文盆地是典型的弧后聚煤盆地,煤层气商业化开发较早,其中部地区勘探程度低,是潜在的储量接替区,但煤层气富集规律尚不清楚,为此,分析盆地中部地区的构造特征、煤层发育特点、煤岩煤质与含气性等地质特征。研究结果表明,该区构造变形强烈,煤层埋深处于100～800 m,煤层厚8～22m,煤岩灰分与惰质组含量较高,Ro为1.5%2.5%,煤层含气量普遍较高。通过深入剖析构造动力条件、煤岩演化条件及煤质条件与含气量的相关关系,认为:该区煤层气富集以构造动力条件为主要影响因素,斜坡、逆断层下盘等保存条件好的区域煤层含气量高,在背斜轴部、靠近断层等区域,煤层气保存条件差,含气量低;在相似的构造条件下,煤层气富集还受到煤质及演化程度的影响。

引用

页码：57 / 65

页数：9

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