收稿日期: 2013-06-13
修回日期: 2013-07-11
网络出版日期: 2014-07-10
基金资助
中国石油科技创新基金(编号:2011D-5006-0101);黑龙江省普通高等学校新世纪优秀人才培养计划(编号：1252-NCET-012)；国家科技重大专项(编号：2011ZX05007-001)联合资助.
Gas Generation Characteristics and Resource Potential of the Deep Source Rockin Xujiaweizi Fault Depression,Northern Songliao Basin
Received date: 2013-06-13
Revised date: 2013-07-11
Online published: 2014-07-10
徐家围子断陷深层天然气藏是目前全球唯一在深层成功勘探的非常规火山岩气藏，已探明天然气储量超过2 400×108m3。气藏围绕深部烃源岩在断裂附近分布，具有明显“源控”、“断控”、“火山机构控制”等特点。从深层烃源岩热模拟实验出发，结合靶区埋藏史、热演化史，对深层烃源岩的生气动力学特征和生气量进行了研究。结果显示：徐家围子断陷深层烃源岩厚度大，有机质丰度高，类型以II型为主，处于高过成熟阶段，生气潜力大。不同层位烃源岩在时间、空间上具有接力生气特点，生气期长。徐家围子断陷深层天然气总生成量为33.75×1012m3，其中沙河子组烃源岩生气量占总生气量的75.78%，煤系生气总量占深层烃源岩总生气量的25.61%，徐家围子深层天然气资源量为(5 020~7 530)×108m3(运聚系数取1.6%~2.4%)。
王民,孙业峰，王文广，王岩，石蕾 . 松辽盆地北部徐家围子断陷深层烃源岩生气特征及天然气资源潜力[J]. 天然气地球科学, 2014 , 25(7) : 1011 -1018 . DOI: 10.11764/j.issn.1672-1926.2014.07.1011
The natural gas reservoir in deep layers of Xujiaweizi fault depression is a successful case of deep layer exploration of unconventional gas in volcanic rock in the world.So far,the proven gas reserves are up to 240 billion cubic meters.The gas reservoirs,distributing near the deep layer source rocks and the fractured zone,have distinct features of “source control”,“fault control” and “volcanic apparatus control”.Based on the thermal simulation experiment of source rocks in deep layer,and combined with its burial history and thermal history,the gas generation kinetic characteristics and gas generating amount were studied.The results show that source rocks in deep layers of Xujiaweizi fault depression have great thickness and high abundance of organic matter,the kerogen type is mainly type Ⅱ,the organic matter is at the stage of high maturity to post maturity and has huge gas generation potential.Source rocks of different layers have a characteristic of relay gas generation in time and space,and have a long gas generation period.The total amount of gases generated in the deep Xujiaweizi fault depression is 33.75×1012m3,and the natural gas generation amount of Shahezi Formation accounts for 75.78% of the total.The gas generation amount of coal strata makes up to 25.61% of the total amount.The natural gas resource quantity of the deep layer is (5 020-7 530)×08m3 (migration and accumulation coefficient is between 1.6%-2.4%).
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