火山岩天然气成藏要素时空匹配及对成藏的控制作用: 以徐家围子地区深层为例

付广; 王有功

火山岩天然气成藏要素时空匹配及对成藏的控制作用: 以徐家围子地区深层为例

付广,
王有功

大庆石油学院地球科学学院, 黑龙江大庆 163318

基金项目:

国家重大基础研究“973” 2001CB209104

博士学科点专项科研基金 20060220002

详细信息

作者简介:
付广(1962-), 男, 教授, 从事油气藏形成与保存条件研究.E-mail: fuguang2008@126.com

中图分类号: P618.13
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出版历程
- 收稿日期: 2008-01-16
- 刊出日期: 2008-05-25

Time and Space Matching Relation among Accumulation Essential Factors of Gas Reservoirs in Volcanic Rock and Its Controlling to Gas Accumulation: A Case Study of Deep Strata of Xujiaweizi Region

Geoscience College, Daqing Petroleum Institute, Daqing 163318, China

摘要

摘要: 通过研究徐家围子地区深层火山岩气藏3个主要成藏要素——沙河子组气源岩、火山岩圈闭和断裂输导通道的时空匹配关系, 得到该区火山岩圈闭与沙河子组气源岩在空间上可以直接接触, 也可以在空间上相距一定距离, 但均由断裂沟通连接.沙河子组气源岩、火山岩圈闭和断裂输导通道在泉头组沉积末期-青山口组沉积中期、嫩江组沉积末期和明水组沉积末期三者时间匹配关系最好, 有利于天然气在火山岩中大规模富集成藏.通过3个主要成藏要素时空分布与火山岩气藏分布之间关系研究得到, 沙河子组气源岩区、Ⅰ、Ⅱ类火山岩储集圈闭和断裂分布在空间上共同控制着火山岩气藏的形成与分布.泉头组沉积末期-青山口组沉积末期、嫩江组沉积末期和明水组沉积末期应是该区火山岩气藏形成的主要时期, 3个主要成藏要素良好的时空匹配关系是造成该区深层火山岩中能形成大、中型气田的根本原因.
- 徐家围子地区 /
- 火山岩 /
- 成藏要素 /
- 匹配关系 /
- 圈闭 /
- 断裂 /
- 源岩
Abstract: Gas source rock of K₁sh, traps of volcanic rock and transport pathway of fault are three main factors that influence Xujianweizi gas reservoirs in volcanic rock.By studying the time and space matching relation of the three factors, we find that traps of volcanic rock can directly contact gas source rock of K₁sh, or a distance can exist between gas source rock of K₁sh and traps of volcanic rock, however, traps of volcano rock are all connected with gas source rock of K₁sh by faults.The time matching relation among gas source rock of K₁sh, traps of volcanic rock and faults is the best from the end of K₁q to the middle of K₁qn, the end of K₁n and the end of K₂m.It is favorable for gas to accumulate in a large scale.According to the study of relation between time and space distribution of gas reservoirs of volcanic rock, gas source rock area of K₁sh, traps of best and better volcanic rock and the distribution of faults spacely controlled the distribution and formation of gas reservoirs of volcano rock.The end of K₁q to the middle of K₁qn, the end of K₁n and the end of K₂m are main accumulation periods of gas reservoirs of volcano rock in Xujiaweizi region.The good matching relation among three accumulation essential factors is the basic cause for the formation of large and medium gas fields in volcanic rock.
- Xujianweizi region /
- volcanic rock /
- accumulation essential /
- matching relation /
- traps /
- fault /
- source rock

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图 1 徐家围子地区深层构造分区图

Fig. 1. Distribution of structure unit of deep strata in Xujiaweizi region

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图 2 徐家围子地区沙河子组气源岩生气强度与火山岩气藏关系

Fig. 2. Relation between generation gas intensity of K₁sh source rock and gas reservoirs in volcanic rock of Xujiaweizi region

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图 3 徐家围子地区深层火山岩气藏与储层评价及断裂关系

Fig. 3. Relation among gas reservoir of volcanic rock and evaluation result of reservoir faults in Xujiaweizi region

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图 4 徐家围子地区火山岩气藏3个主要成藏要素空间匹配关系示意图

a.昌德东气藏; b.徐深1气藏; c.升深2气藏; d.汪903井气藏; 1.砂泥岩; 2.气源岩; 3.气藏; 4.火山岩; 5.断裂输导通道

Fig. 4. Sketch for space matching relation among three main accumulation essential factors of gas reservoirs in volcanic rock of Xujiaweizi region

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图 5 徐家围子断陷沙河子组气源岩、火山岩圈闭和断裂输导通道时间匹配关系

1.断裂输导通道和火山岩裂缝圈形成时期; 2.火山岩孔隙型圈闭开始形成时期

Fig. 5. Time matching relation among gas source rock of K₁sh, traps of volcanic rock and transport pathway of fault in Xujiaweizi region

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图 6 徐家围子地区深层火山岩天然气注入期次

Fig. 6. Gas accumulation periods of volcanic rock of deep strata in Xujiaweizi region

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